Chemical Engineering Journal Advances最新文献

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The determination of nitrogen-to-carbon ratio in urea synthesis using gamma radiation technique and comparison with oscillation technique 用伽马射线法测定尿素合成中氮碳比并与振荡法比较
IF 7.1
Chemical Engineering Journal Advances Pub Date : 2025-08-27 DOI: 10.1016/j.ceja.2025.100850
S.Z. Islami rad , R. Gholipour Peyvandi
{"title":"The determination of nitrogen-to-carbon ratio in urea synthesis using gamma radiation technique and comparison with oscillation technique","authors":"S.Z. Islami rad ,&nbsp;R. Gholipour Peyvandi","doi":"10.1016/j.ceja.2025.100850","DOIUrl":"10.1016/j.ceja.2025.100850","url":null,"abstract":"<div><div>Accurate ratio control of the components in the urea synthesis section plays a crucial role in achieving stable and efficient operation of the urea process. Additionally, obtaining the optimum yield of urea in the stripping urea process requires the reactants to be present at a specific ratio, known as the N/C ratio. In this study, the gamma radiation technique was employed to measure the density of urea, which has a linear relationship with the N/C ratio. In this technique, a ¹³⁷Cs source and a NaI(Tl) detector were positioned on opposite sides of the outlet pipe to measure the density of urea under processing conditions. The measurements were conducted with an accuracy of better than 0.5 % at 2σ. The NC meter was capable of measuring a density range between 500 kg/m³ and 2000 kg/m³. The measured results were compared with data acquired using the oscillation technique, showing a strong agreement between the two methods. Consequently, the gamma radiation technique demonstrates superior advantages over the oscillation technique and other methods due to its non-contact, non-invasive, non-destructive, online, cost-effective, and real-time characteristics.</div></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"24 ","pages":"Article 100850"},"PeriodicalIF":7.1,"publicationDate":"2025-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144917396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Geometric optimization of venturi reactors for enhanced hydrodynamic cavitation efficiency: From conventional to advanced tandem configurations 文丘里反应器的几何优化,以提高流体动力空化效率:从传统到先进的串联配置
IF 7.1
Chemical Engineering Journal Advances Pub Date : 2025-08-26 DOI: 10.1016/j.ceja.2025.100844
Kimia Nadiri, Soroush Baradaran
{"title":"Geometric optimization of venturi reactors for enhanced hydrodynamic cavitation efficiency: From conventional to advanced tandem configurations","authors":"Kimia Nadiri,&nbsp;Soroush Baradaran","doi":"10.1016/j.ceja.2025.100844","DOIUrl":"10.1016/j.ceja.2025.100844","url":null,"abstract":"<div><div>This research aims to enhance the efficiency of conventional and Tandem cavitating Venturis. To address the limitations of Conventional hydrodynamic cavitation reactors, such as low degradation efficiency and insufficient vapor formation, a series-arranged Venturi system is proposed. Primarily, the impact of three contributing geometric parameters—convergence angle, divergence angle, and throat length—on the performance of a Conventional Venturi was evaluated and validated. After determining the optimal configuration for a Conventional Venturi, key geometric considerations were applied to refine the proposed Tandem Venturi system. The effects of these parameters and interactive effects were analyzed using Response Surface Methodology (RSM). The geometries suggested by RSM were simulated in Ansys Fluent, with the area-weighted average of vapor volume fraction along the venturi serving as the objective function. The results revealed that the divergence angle significantly influenced vapor formation and the cavitation zone in the conventional configuration. Ultimately, the optimization process identified the ideal dimensions for the Conventional Venturi: a convergence angle of 80°, a divergence angle of 8°, and a throat length of 4.65 mm. Utilizing these dimensions as a baseline, the Tandem Venturi system was optimized, resulting in an internal convergence angle of 40°, an internal divergence angle of 6°, and throat diameters of 4 mm and 8 mm. The optimized Tandem Venturi achieved a 28 % increase in cavitating bubble formation compared to the optimal Conventional configuration. This substantial enhancement in bubble formation improves overall cavitation efficiency and expands the cavitation zone.</div></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"24 ","pages":"Article 100844"},"PeriodicalIF":7.1,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phase composition or material morphology, which one plays the pioneering role in promoting microwave absorption and hyperthermia 相组成或材料形态,其中一个在促进微波吸收和热疗中起着先锋作用
IF 7.1
Chemical Engineering Journal Advances Pub Date : 2025-08-26 DOI: 10.1016/j.ceja.2025.100845
Zahra Peymaneh , Somayeh Sheykhmoradi , Zahra Nezafat , Arezoo Ghaffari , Vahid Mirkhan , Shaghayegh Ghorbanian-Gezaforodi , Reza Peymanfar
{"title":"Phase composition or material morphology, which one plays the pioneering role in promoting microwave absorption and hyperthermia","authors":"Zahra Peymaneh ,&nbsp;Somayeh Sheykhmoradi ,&nbsp;Zahra Nezafat ,&nbsp;Arezoo Ghaffari ,&nbsp;Vahid Mirkhan ,&nbsp;Shaghayegh Ghorbanian-Gezaforodi ,&nbsp;Reza Peymanfar","doi":"10.1016/j.ceja.2025.100845","DOIUrl":"10.1016/j.ceja.2025.100845","url":null,"abstract":"<div><div>Morphology and phase control have enabled better tuning of microwave absorbing, hyperthermia, and optical characteristics. The phase and morphology of materials determine fundamental factors, including permeability, permittivity, impedance matching, magnetic properties, and optical performance. The nature of each phase individually determines microwave absorption performance based on its permeability and permittivity. Meanwhile, nucleated phases and their modification, based on intrinsic characteristics, as well as size and morphology properties, by improving polarization-relaxation loss, magnetic properties, impedance matching, metamaterial characteristics, multiple reflections and scatterings, microcurrents, and conductive networks, pave the way for microwave attenuation. In the hyperthermia scenario, the crystalline phase offers pioneering magnetic performances such as saturation magnetization and coercivity; on the other hand, the morphology based on the Snoek limit and regulated spin pinning, crystal defect, and unsaturated coordinate states suggests the magnetic characteristics and optimizes the hyperthermia performance. Optimizing these features can significantly improve microwave absorption and hyperthermia performance. Here, the morphology of the CuFe<sub>2</sub>O<sub>4</sub> structure was manipulated, and various crystalline phases, including Cu, CuO, Fe<sub>2</sub>O<sub>3</sub>, and Fe<sub>3</sub>O<sub>4</sub>, were loaded into the structure using innovative precursors and synthetic routes. To fabricate the final composite, polyethersulfone (PES) was used as a polarizable microwave-absorbing medium, thereby regulating the microwave absorption and shielding performance. The phase-modified sample (Fe<sub>2</sub>O<sub>3</sub>/CuO/PES) demonstrated the highest reflection loss (RL) of -95.43 dB at 25.35 GHz and an effective bandwidth of 3.24 GHz, with a thickness of 1.95 mm. Particularly, morphology-modified CuFe<sub>2</sub>O<sub>4</sub>/PES covered the k-band with a thickness ranging from 0.35 to 0.75 mm. The radar cross sections (RCS) results demonstrated that the phase and morphology modification promoted the cloaking capability of the samples. An impressive RCS reduction of 37.61 dBm² was achieved at an angle of 33 degrees. More importantly, the architected samples demonstrated considerable electromagnetic interference shielding effectiveness (EMI SE) and specific absorption rate in hyperthermia therapy.</div></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"24 ","pages":"Article 100845"},"PeriodicalIF":7.1,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144912564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The potential of valuable metal recovery from low-grade mixed waste printed circuit boards: Perspectives from mechanical preprocessing 从低品位混合废印刷电路板中回收有价金属的潜力:从机械预处理的角度
IF 7.1
Chemical Engineering Journal Advances Pub Date : 2025-08-26 DOI: 10.1016/j.ceja.2025.100846
Yidong Xia , Zachary Diermyer , Noah Berglund , Ling Ding , Jordan Klinger , Vicki Thompson , Jiaoyan Li , Samuel Forrest , Shannon Alford
{"title":"The potential of valuable metal recovery from low-grade mixed waste printed circuit boards: Perspectives from mechanical preprocessing","authors":"Yidong Xia ,&nbsp;Zachary Diermyer ,&nbsp;Noah Berglund ,&nbsp;Ling Ding ,&nbsp;Jordan Klinger ,&nbsp;Vicki Thompson ,&nbsp;Jiaoyan Li ,&nbsp;Samuel Forrest ,&nbsp;Shannon Alford","doi":"10.1016/j.ceja.2025.100846","DOIUrl":"10.1016/j.ceja.2025.100846","url":null,"abstract":"<div><div>To recover valuable metals from electronic waste (e-waste), industry prefers feedstock streams by category to improve efficiency. This though ignores the massive mixed waste printed circuit board (WPCBs) that are fragmented, hard to separate, and continue presenting risks to the environment and human health. This work explores the potential of valuable metal recovery from the abundant low-grade mixed WPCBs with perspectives from mechanical preprocessing. A two-stage comminution process involving shredding and cryogenic milling, with a two-stage elemental composition analysis method, is introduced to investigate the concentrations of select valuable metals. The cryogenic mill is specially configured to minimize airborne fines, ensure safe laboratory environment, and achieve over 99 % mass retention. The milled particles are screened successively from 4 to 0.045 mm for accurate analysis of metal concentrations in each size class. Copper is dominant regarding mass percentage and concentrated in larger particles, followed by aluminum. The concentration of barium grows consistently with particle size decreasing from 4 to 0.045 mm, while tin exhibits a peak concentration around 0.5 mm. Beryllium is nearly non-detectable. Optimal milling time for the shredded PCBs depends on the target metals. Our findings indicate a potential to recover target metals from the low-grade mixed WPCBs in separate particle sizes, i.e., larger particles for base metals like copper and smaller particles for higher-value metals like barium and tin. Lead concentration is found higher in smaller particles, highlights the necessity of the proposed fines containment method for milling process.</div></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"24 ","pages":"Article 100846"},"PeriodicalIF":7.1,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A comprehensive evaluation of high-sulfur petroleum coke in CO2 gasification to produce low-carbon syngas 高硫石油焦在CO2气化生产低碳合成气中的综合评价
IF 7.1
Chemical Engineering Journal Advances Pub Date : 2025-08-25 DOI: 10.1016/j.ceja.2025.100842
Hazratul Mumtaz Lahuri , Pooya Lahijani , Abdul Rahman Mohamed
{"title":"A comprehensive evaluation of high-sulfur petroleum coke in CO2 gasification to produce low-carbon syngas","authors":"Hazratul Mumtaz Lahuri ,&nbsp;Pooya Lahijani ,&nbsp;Abdul Rahman Mohamed","doi":"10.1016/j.ceja.2025.100842","DOIUrl":"10.1016/j.ceja.2025.100842","url":null,"abstract":"<div><div>This study investigates the potential of high-sulfur petroleum coke as a feedstock for CO<sub>2</sub> gasification to produce syngas, offering a novel pathway for CO<sub>2</sub> decarbonization and promote a circular economy in oil and gas industry. CO<sub>2</sub> gasification experiments were conducted under isothermal conditions using a thermogravimetric analyzer (TGA). K<sub>2</sub>CO<sub>3</sub> was employed as a catalyst at varying loadings from 0–20 wt.%. The kinetic models, Shrinking Core Model (SCM) and Volume Reaction Model (VRM) were applied to describe the gasification reaction rate and the activation energy. Catalytic enhancement significantly improved the reactivity and lowering activation energy from 150.66 kJ/mol to 96.96 kJ/mol at a 5 wt.% catalyst loading. Multi objective optimization via Response Surface Methodology (RSM) demonstrated high R² values &gt; 93 % for petroleum coke conversion, CO yield and CO<sub>2</sub> composition. Under optimized conditions 62 % petroleum coke conversion and 42 mol% CO yield were achieved. The novelty of this work lies in its integrated approach to petroleum coke- CO<sub>2</sub> gasification by combining study on catalytic enhancement, kinetic modeling and statistical optimization. This contributes to the economic viability of a decarbonization pathway aligned with circular economic principles.</div></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"24 ","pages":"Article 100842"},"PeriodicalIF":7.1,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144912566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Magnetic field aligned carbon nanotube networks for structurally optimized cathodes catalyst layer of polymer electrolyte membrane fuel cells 聚合物电解质膜燃料电池阴极催化剂层磁场定向碳纳米管网络结构优化
IF 7.1
Chemical Engineering Journal Advances Pub Date : 2025-08-25 DOI: 10.1016/j.ceja.2025.100843
Won-Jong Choi , Inku Kang , Eun-Sun Oh , Wonjong Kim , Yunseo Choe , Yongsil Kim , Sang Jun Yoon , Duk Man Yu , Soonyong So , Keun-Hwan Oh
{"title":"Magnetic field aligned carbon nanotube networks for structurally optimized cathodes catalyst layer of polymer electrolyte membrane fuel cells","authors":"Won-Jong Choi ,&nbsp;Inku Kang ,&nbsp;Eun-Sun Oh ,&nbsp;Wonjong Kim ,&nbsp;Yunseo Choe ,&nbsp;Yongsil Kim ,&nbsp;Sang Jun Yoon ,&nbsp;Duk Man Yu ,&nbsp;Soonyong So ,&nbsp;Keun-Hwan Oh","doi":"10.1016/j.ceja.2025.100843","DOIUrl":"10.1016/j.ceja.2025.100843","url":null,"abstract":"<div><div>The oxygen diffusion resistance and inefficient water removal in conventional cathode catalyst layers (CLs) in polymer electrolyte membrane fuel cells (PEMFCs) restrict their performance at high current densities despite the presence of large pores in the cathode CL. To resolve these issues, a polystyrene sulfonate (PSS)-coated CNT-Fe<sub>3</sub>O<sub>4</sub> (PSS@CNT-Fe<sub>3</sub>O<sub>4</sub>) was introduced for preventing agglomeration and facilitating precise pore control under a magnetic field. This study investigated the effect of the orientation of the magnetic field on the drying position of PSS@CNT-Fe<sub>3</sub>O<sub>4</sub> and its impact on the performance of the cathode CL. A CL dried under a bidirectional magnetic field applied from both the top and bottom achieved the highest performance in the high current density region (2.0 A cm<sup>–2</sup> at 0.4 V). This improvement was attributed to the continuous distribution of pores in the cathode CL, with no ionomer imbalance. In contrast, the ionomer and catalyst became unevenly distributed when the CL was dried with a magnetic field applied from just one direction (either top or bottom), thereby resulting in reduced performance: 1.54 A cm<sup>–2</sup> at 0.4 V (bottom) and 1.87 A cm<sup>–2</sup> at 0.4 V (top). These findings suggest the potential of the proposed approach for enhancing the mass transport efficiency of cathode CLs for PEMFCs.</div></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"24 ","pages":"Article 100843"},"PeriodicalIF":7.1,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144912562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On linear and nonlinear diffusion in liquids according to linear nonequilibrium thermodynamics 根据线性非平衡热力学研究液体中的线性和非线性扩散
IF 7.1
Chemical Engineering Journal Advances Pub Date : 2025-08-24 DOI: 10.1016/j.ceja.2025.100841
Jacek Waniewski
{"title":"On linear and nonlinear diffusion in liquids according to linear nonequilibrium thermodynamics","authors":"Jacek Waniewski","doi":"10.1016/j.ceja.2025.100841","DOIUrl":"10.1016/j.ceja.2025.100841","url":null,"abstract":"<div><div>The derivation of the description of diffusive-convective transport from the linear non-equilibrium thermodynamics (LNT) by Kedem and Katchalsky (KK, 1958) yields a nonlinear diffusion equation (with diffusivity parameter proportional to solute concentration) whereas experimental data frequently can be described by the linear equation with constant diffusivity parameter.</div><div>Three different assumptions on the dependence of Onsager phenomenological parameters on solute concentrations are applied to derive KK model and two new alternative models. All three models have the same expression for total volumetric flow. The alternative models involve linear free self-diffusion but all three models predict a nonlinear term added to diffusion across osmotically active milieu (as permselective membranes); the cross-diffusion parameters are in general dependent on solute concentration and include the additional nonlinear term valid for osmotically active milieu. A theoretical example of diffusion across a permselective membrane in diffusional chamber allow us for the comparison of the predictions from the different models for ideal diluted solutions. Representations of the solute fluxes using solute volumetric velocities are also derived for each model. The analysis of published experimental data on free diffusion in ternary systems and on the diffusive transport across semipermeable membrane in binary systems, with the measurements of transport parameters for different solute concentrations, using the experimentally established diffusivity parameters and Onsager phenomenological parameters, indicates one of the new models instead of the KK model.</div><div>We conclude that the Kedem-Katchalsky approach cannot be confirmed for some experimental systems and another proposed model should be further investigated for the description of solute transport in incompressible fluids.</div></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"24 ","pages":"Article 100841"},"PeriodicalIF":7.1,"publicationDate":"2025-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144926342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Advanced cathode binders for lithium-ion batteries: Molecular design and performance enhancement 锂离子电池的先进阴极粘合剂:分子设计和性能增强
IF 7.1
Chemical Engineering Journal Advances Pub Date : 2025-08-23 DOI: 10.1016/j.ceja.2025.100838
Yi Tian , Jun Xie , Meng Tian , Xuan Luo , Luhan Wang , Shijie Zhou , Yangyang Feng , Linlin Hu
{"title":"Advanced cathode binders for lithium-ion batteries: Molecular design and performance enhancement","authors":"Yi Tian ,&nbsp;Jun Xie ,&nbsp;Meng Tian ,&nbsp;Xuan Luo ,&nbsp;Luhan Wang ,&nbsp;Shijie Zhou ,&nbsp;Yangyang Feng ,&nbsp;Linlin Hu","doi":"10.1016/j.ceja.2025.100838","DOIUrl":"10.1016/j.ceja.2025.100838","url":null,"abstract":"<div><div>As essential components in lithium-ion batteries (LIBs), polymer binders serve the fundamental purpose of effectively binding active particles and conductive agents to the current collector, thereby ensuring the structural integrity and stability of the electrodes. Although polyvinylidene fluoride (PVDF), the conventional cathode binder, is extensively utilized in lithium-ion batteries, it faces significant challenges, including limited adhesion, insufficient mechanical strength, and poor ionic conductivity. In response, significant research efforts are directed toward developing multifunctional polymer binders with improved adhesion, stability, and conductivity to satisfy the increasing demands for performance, cost-effectiveness, and environmental sustainability in advanced LIBs. This review systematically examines recent progress in cathode binder technology, encompassing: (1) comparative analysis of oil-soluble and water-soluble binder systems and their respective influence mechanisms on different cathode materials; (2) systematic summary and analysis of the necessity and preparation methods of functional conductive binders. Finally, we outline the future development prospects and challenges in next-generation binder development.</div></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"24 ","pages":"Article 100838"},"PeriodicalIF":7.1,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144912565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fabrication of graphene oxide vortex ring particle for efficient adsorptive removal of organic dyes from water 高效吸附去除水中有机染料的氧化石墨烯涡旋环颗粒的制备
IF 7.1
Chemical Engineering Journal Advances Pub Date : 2025-08-21 DOI: 10.1016/j.ceja.2025.100840
Kaiwen Nie , M. I. Hossain , Carletta Wong , Yizhen Shao , Maria Iliut , Aravind Vijayaraghavan
{"title":"Fabrication of graphene oxide vortex ring particle for efficient adsorptive removal of organic dyes from water","authors":"Kaiwen Nie ,&nbsp;M. I. Hossain ,&nbsp;Carletta Wong ,&nbsp;Yizhen Shao ,&nbsp;Maria Iliut ,&nbsp;Aravind Vijayaraghavan","doi":"10.1016/j.ceja.2025.100840","DOIUrl":"10.1016/j.ceja.2025.100840","url":null,"abstract":"<div><div>Graphene-based vortex ring aerogels, characterised by high surface area and controllable structures, represent optimistic candidates for the adsorptive removal of pollutants. In this study, graphene oxide-vortex ring (GO-VR) aerogel particles were synthesised by impacting GO droplets onto cetyltrimethylammonium bromide (CTAB) solutions, which drives the formation of a stable VR hydrogel. The hydrogel was then produced into an aerogel after a freeze-drying process. GO concentration and impact height were key parameters in influencing the VR shape formation, while shape evolution was independent of GO droplet volume. Moreover, CTAB concentration did not affect the particle shape but improved the hydrogel stability. Optical microscopy and SEM imaging characterisation techniques confirmed the formation of the core-shell structure and revealed that the donut-shaped GO-VR aerogel particles showed the highest porosity, while ball-shaped exhibited the least. Adsorption experiments with model dyes showed the highest adsorption capacity, particularly the smallest size of 10 μl and the donut shape displayed superior adsorption efficiency equal to its own weight (1 g/g) significantly surpassing reported GO-based materials values. Adsorption Kinetics were studied using Pseudo-second-order (PSO) and intraparticle diffusion (IP) models; donut-shaped GO-VR particles showed the rapid adsorption rate and highest diffusion efficiency. Therefore, promising GO-VR particles offer a novel approach to growing superior adsorbents, which will consequently enhance water purification technologies.</div></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"24 ","pages":"Article 100840"},"PeriodicalIF":7.1,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144912563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced reactivity and electron efficiency of nanoscale zero-valent iron for nitroaromatic compounds reduction through modification with anthraquinone-2-carboxylic acid 蒽醌-2-羧酸修饰纳米级零价铁还原硝基芳香族化合物的反应活性和电子效率提高
IF 7.1
Chemical Engineering Journal Advances Pub Date : 2025-08-01 DOI: 10.1016/j.ceja.2025.100835
Yuxin Li , Shiqi Yang , Zihan Liu , Yiyang Pan , Pengfei Zhang , Zhiqiu Qu , Chao Shan
{"title":"Enhanced reactivity and electron efficiency of nanoscale zero-valent iron for nitroaromatic compounds reduction through modification with anthraquinone-2-carboxylic acid","authors":"Yuxin Li ,&nbsp;Shiqi Yang ,&nbsp;Zihan Liu ,&nbsp;Yiyang Pan ,&nbsp;Pengfei Zhang ,&nbsp;Zhiqiu Qu ,&nbsp;Chao Shan","doi":"10.1016/j.ceja.2025.100835","DOIUrl":"10.1016/j.ceja.2025.100835","url":null,"abstract":"<div><div>Humic substances (HS) modification favors the reactivity of nanoscale zero-valent iron (nZVI) for water decontamination from nitro-compounds like nitrobenzene (NB), whereas the structural complexity of HS hinders the elucidation of its mechanism. Herein, anthraquinone-2-carboxylic acid (AQC) was employed as a typical model molecule for HS. Through AQC modification, the water contact angle of nZVI evidently increased from 6° to 19°-46°, and the rate constant and electron efficiency for NB reduction under aerobic condition was substantially elevated by 6–10.3 times and 2.5–2.8 times, respectively. Among the AQC-modified nZVI materials with varied molar ratios of AQC/Fe (0.1–3 %), 1 % AQC-nZVI not only exhibited the optimal reactivity and electron efficiency, but also demonstrated enhanced reactivity for various nitroaromatic compounds. Moreover, AQC modification could advance the complete reduction of NB by nZVI to aniline and minimize the accumulation of intermediates. In addition, AQC-nZVI materials could maintain an excellent reduction efficiency over a wide pH range (4–9). Mechanistically, the increase of surface hydrophobicity of nZVI owing to AQC modification promoted the adsorption affinity for NB and redirected more electron transfer to NB. Leveraging both anthraquinone and carboxylic groups, AQC served as electron shuttle to mediate the electron transfer from nZVI to NB whilst accelerating the Fe(II)/Fe(III) circulation. Electrochemical impedance spectroscopy revealed a pronounced decrease in the charge transfer resistance of nZVI from 381.4 Ω to 252.8–337.4 Ω due to AQC modification, thereby facilitating the interfacial electron transfer. This study offers insights into the HS-enhanced reactivity and selectivity of nZVI for water decontamination from nitroaromatic compounds.</div></div>","PeriodicalId":9749,"journal":{"name":"Chemical Engineering Journal Advances","volume":"23 ","pages":"Article 100835"},"PeriodicalIF":7.1,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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