Asia-Pacific Journal of Chemical Engineering最新文献

{"title":"Correction to “Investigation of molecular interaction, performance of green solvent in esterification of ethanol and acetic acid at 298.15 K and at 1 atm”","authors":"","doi":"10.1002/apj.3167","DOIUrl":"https://doi.org/10.1002/apj.3167","url":null,"abstract":"<p>Ramalingam A, Banerjee T, Santhi VM, Mishra DK, Reji DJPM, Nagaraj S. Investigation of molecular interaction, performance of green solvent in esterification of ethanol and acetic acid at 298.15 K and at 1 atm. <i>Asia-Pac J Chem Eng.</i> 2023; 18(2):e2875. doi:10.1002/apj.2875</p><p>Errors included in the original article may be due to the purity of individual components and experimental error, including sample bottle cleaning and the syringe used for density measurements. In addition, the apparent molar volume was calculated using a mathematical expression.</p><p>In Section 4.1, Para 1, Line 7: The following correction has been done.</p><p>“lesser than 0.02%” instead of “lesser than 0.23%”.</p><p>In Section 4.1, Equation (1): The equation was corrected as:</p><p>“\u0000<span></span><math>\u0000 <msub>\u0000 <mi>ρ</mi>\u0000 <mtext>mixture</mtext>\u0000 </msub>\u0000 <mo>=</mo>\u0000 <mi>a</mi>\u0000 <mfenced>\u0000 <mi>T</mi>\u0000 </mfenced>\u0000 <mo>+</mo>\u0000 <mi>b</mi></math>” instead of “\u0000<span></span><math>\u0000 <msub>\u0000 <mi>ρ</mi>\u0000 <mtext>mixture</mtext>\u0000 </msub>\u0000 <mo>=</mo>\u0000 <mi>a</mi>\u0000 <mo>+</mo>\u0000 <mi>b</mi>\u0000 <mfenced>\u0000 <mi>T</mi>\u0000 </mfenced>\u0000 <mo>+</mo>\u0000 <mi>c</mi>\u0000 <msup>\u0000 <mfenced>\u0000 <mi>T</mi>\u0000 </mfenced>\u0000 <mn>2</mn>\u0000 </msup></math>.</p><p>In Section 4.2, Para 2: The following correction has been done.</p><p>“[EMIM][EtSO<sub>4</sub>] > [EMIM][HSO<sub>4</sub>] > EtAc > [ChCl][Gly] > [ChCl][AA] > EtOH > HAc > water”.</p><p>Use the above lines, instead of:</p><p>[EMIM][EtSO<sub>4</sub>] < [EMIM][HSO4] < EtAc < [ChCl][Gly] < [ChCl][AA] < EtOH < HAc < water.</p><p>In Section 4.2, Para 3, Line 3: the following line has been corrected as:</p><p>“It can be observed that the \u0000<span></span><math>\u0000 <msup>\u0000 <mi>V</mi>\u0000 <mi>E</mi>\u0000 </msup></math> values are positive for the binary mixtures of EtOH with EtAc, DES<sub>1</sub> {[ChCl][2AA]}, and DES<sub>2</sub> [ChCl][2Gly] over the entire composition range at all the studied temperatures”.</p><p>Use the above lines, instead of:</p><p>“It can be observed that the \u0000<span></span><math>\u0000 <msup>\u0000 <mi>V</mi>\u0000 <mi>E</mi>\u0000 </msup></math> values are positive for the binary mixtures of EtOH with EtAc, [EMIM][HSO<sub>4</sub>], [EMIM][EtSO<sub>4</sub>], [ChCl][AA], and [ChCl][Gly] over the entire composition range at all the studied temperatures”.</p><p>In Section 4.2, Para 4, Line 7: The following line has been corrected as:</p><p>“The maximum of excess molar ","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"19 6","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/apj.3167","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142759707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new iron recovery and dephosphorization approach from unroasted high-phosphorus oolitic hematite ore via a facile chemical beneficiation process","authors":"Minghui Gong,&nbsp;Likun Gao,&nbsp;Huixin Dai,&nbsp;Xiaosong Tian,&nbsp;Fei He,&nbsp;Mei Liu,&nbsp;Bing Rao,&nbsp;Qingsong Zhang,&nbsp;Zhaobo Yin","doi":"10.1002/apj.3159","DOIUrl":"https://doi.org/10.1002/apj.3159","url":null,"abstract":"<p>Despite the abundance of scientific reports on the treatment of oolitic hematite, it still constitutes a global challenge. The distinctive oolitic structure within the ore is regarded as the primary factor causing the difficulty in the beneficiation of oolitic hematite ore. The objective of this study is to devise an effective approach to tackle the issue of beneficiation of oolitic hematite ore, thereby facilitating the utilization of oolitic hematite ore, which is widely abundant worldwide. Based on the Pourbaix diagram (E_h-pH) of the Al-Si-H₂O system, an alkaline leaching process for eliminating impurities from unroasted oolitic hematite using NaOH solution as the leaching agent was proposed. The optimal parameters were determined as a temperature of 250°C, a NaOH concentration of 16 mol/L, a liquid-to-solid ratio of 4 mL/g, and a reaction time of approximately 2 h. Around 54% of phosphorus (P), 21% of Al₂O₃, and 61% of SiO₂ can be preliminarily removed from unroasted oolitic hematite ore. Through further dephosphorization with dilute sulfuric acid at room temperature, a high-quality Fe concentrate with 63.3% Fe, 0.04% P, and a Fe recovery rate of 96% was obtained. The alkali can be readily regenerated by adding lime to the leaching solution, and the regenerated alkali has a leaching effect comparable to that of the fresh leaching solution. The recycling and utilization of alkaline leaching agents minimize production costs to the greatest extent possible. Mechanical studies have discovered that intact oolites undergo complete dissociation under alkaline leaching, enabling the leaching solution to permeate into the particles and thereby deeply eliminate impurities. The novel method has accomplished efficient processing of oolitic hematite and a reasonable control of production costs during processing, which is significant for expanding the reserves of iron ore resources.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143187292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"KCl supported by γ-Al2O3 for selective adsorption of gaseous oxidized mercury: Preparation and adsorption mechanism","authors":"Jiangyi Tong,&nbsp;Haiyang Li,&nbsp;Rui Jin,&nbsp;Xiaoshuo Liu,&nbsp;Haitao Hu,&nbsp;Yufeng Duan,&nbsp;Xiuyuan Ma,&nbsp;Li Zhong,&nbsp;Lipeng Han","doi":"10.1002/apj.3161","DOIUrl":"https://doi.org/10.1002/apj.3161","url":null,"abstract":"<p>The separation of Hg⁰ and HgCl₂ with selective adsorbents is crucial for mercury speciation detection. KCl is commonly used but has a limited surface area, a short lifespan, and an unclear mechanism for Hg⁰/HgCl₂ adsorption. Hence, KCl supported by γ-Al₂O₃ to create a high-surface-area selective adsorbent to enhance practical performance was proposed and the selective adsorption mechanisms of Hg⁰ and HgCl₂ through experimental investigations and density functional theory (DFT) calculations were elucidated. Compared to the total breakthrough of pure KCl, that of KCl/γ-Al₂O₃ exhibits markedly selective adsorption efficacy on HgCl₂, with a nearly complete breakthrough rate on Hg⁰ at a KCl-to-γ-Al₂O₃ molar ratio of 1, attributed to their favorable porosity and dispersed active sites. The DFT results verify a weak van der Waals force between KCl and Hg⁰, indicating physisorption, while covalent bonding occurs between KCl and HgCl₂, suggesting chemisorption. High-resolution transmission electron microscopy (HRTEM) identifies two crystalline surfaces of 001 and 011 on the developed adsorbent. This clarifies three stable adsorption configurations: 001 Top-Cl, 011 Top-Cl, and 011 Cl–Cl bridge, with adsorption energies of −87.11, −110.74, and −174.91 kJ/mol, respectively. Analyses of the electronic structure and interaction region indicator (IRI) reveal that the Hg atom within HgCl₂ forms covalent bonds with unsaturated Cl atoms on the KCl surface. Additionally, integrated crystal orbital Hamilton population (ICOHP) analysis and electron transfer results demonstrate that the interaction strength of the three configurations with HgCl₂ follows the order of 011 Cl–Cl bridge &gt; 011 Top-Cl &gt; 001 Top-Cl. This matches the three different temperature peaks of 276, 231, and 120°C, respectively, in the analysis of the temperature-programmed desorption of HgCl₂ (HgCl₂-TPD). This study offers a novel insight on mercury speciation partitioning between Hg⁰ and HgCl₂.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143187293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A multianalytical approach to benzodiazepine derivatives for the corrosion protection of mild steel in HCl solutions: Electrochemical analysis, SEM/EDX, XPS, DFT, and MDS calculations","authors":"Otmane Kharbouch,&nbsp;Khadija Dahmani,&nbsp;Issam Saber,&nbsp;Marouane El-alouani,&nbsp;Nordine Errahamany,&nbsp;Fatima El hajri,&nbsp;Mouhsine Galai,&nbsp;Said Boukhris,&nbsp;Mohamed Ebn Touhami,&nbsp;Hakima Nassali,&nbsp;Abeer A. AlObaid,&nbsp;Basheer M. Al-Maswari,&nbsp;Mohammad K. Al-Sadoon","doi":"10.1002/apj.3164","DOIUrl":"https://doi.org/10.1002/apj.3164","url":null,"abstract":"<p>This study takes a detailed look at the corrosion inhibition capabilities of two benzodiazepine-derived organic compounds, 3,3-dimethyl-11-(4-nitrophenyl)-2,3,4,5,10,11-hexahydro-1H-dibenzo[b,e][1,4]diazepin-1-one (PNO) and 3,3-dimethyl-11-(2-nitrophenyl)-2,3,4,5,10,11-hexahydro-1H-dibenzo[b,e][1,4]diazepin-1-one (ONO), in a 1.0-M hydrochloric acid environment using a variety of analytical methods, including electrochemical approaches — electrochemical impedance spectroscopy (EIS) and potentio-dynamic polarization (PDP). The results show that the concentration-dependent inhibitory efficacy of PNO and ONO increases with increasing concentration. Both inhibitors exhibit mixed-type behaviour, which is confirmed by the polarization results. At the optimum concentration, the inhibition efficiencies of PNO and ONO are 92.9% (PNO) and 87.6% (ONO), respectively. The effective adsorption of these inhibitors on the metal surface was also confirmed by X-ray photoelectron spectroscopy (XPS) analysis. The existence of a barrier layer surrounding the mild steel was demonstrated using scanning electron microscopy (SEM) and energy-dispersive X-ray analysis (EDX), all of which were used to study the surface characterization. The most important interactions with the iron surface are achieved by inhibitors with electron-accepting properties, according to density functional theory results and molecular dynamic simulation (MDS). With encouraging prospects for industry and metal preservation, these results pave the way for promising applications for effective corrosion protection in a 1.0-M HCl environment.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143187167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CFD modeling of gas–solid flow in a two-stage jetting fluidized bed with an overflow standpipe","authors":"Zhengyu Wang,&nbsp;Teng Wang,&nbsp;Meiyu Zhou,&nbsp;Luhaibo Zhao","doi":"10.1002/apj.3163","DOIUrl":"https://doi.org/10.1002/apj.3163","url":null,"abstract":"<p>The two-fluid model–kinetic theory of granular flow (TFM–KTGF) model and the sub-grid-scale (SGS) model are used to conduct a three-dimensional numerical simulation study on the hydrodynamic characteristics of a two-stage fluidized bed with an integrated overflow pipe. Using various drag models, the gas–solid flows, bed expansions, pressure drop distributions, and equilibrium conditions in the two-stage bed are compared, and the conditions for the formation of a stable overflow in the two-stage bed are thoroughly investigated. In addition, during the simulation of the secondary distribution in the bed, the porous media model simulates the momentum loss caused by the redistribution plate to avoid the direct simulation of the redistribution plate, which requires extensive grid division work and calculation costs. This work can provide technical direction for the industrialization of one-step coal to multistage fluidized bed natural gas technology.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143187256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the flow and heat transfer characteristics of a hybrid nanofluid jet impingement microchannel heat sink with airfoil fins","authors":"Zhiguo Tang,&nbsp;Man Li,&nbsp;Yan Li,&nbsp;Jianping Cheng","doi":"10.1002/apj.3160","DOIUrl":"https://doi.org/10.1002/apj.3160","url":null,"abstract":"<p>Due to the continuously increasing power density of electronic devices, the improvement of the temperature uniformity and the reduction of the irreversible energy losses became crucial in these studies on enhanced cooling capacity of the heat sinks. In this paper, a jet impingement microchannel heat sink with airfoil fins (AF-JIMHS) is proposed. The AF-JIMHS with reversed fins arrangement has very high comprehensive heat transfer performance. The increase of the internal tangent circle radius and chord length of fin can improve the temperature uniformity of the AF-JIMHS bottom surface and reduce the irreversible energy losses, at the expense of reducing its comprehensive heat transfer performance. Although the increase of the tangent arc length of fin reduces the temperature uniformity and increases the irreversible energy losses of the AF-JIMHS, it improves the comprehensive heat transfer performance in a specific parameter range. The increase of fin height improves temperature uniformity of the AF-JIMHS, while reducing its irreversible energy losses and improving its comprehensive heat transfer performance. Compared with the AF-JIMHS with uniform height fins, the one with decreasing height fins has higher comprehensive heat transfer performance and lower irreversible energy losses. Moreover, the AF-JIMHS with increasing height fins has better temperature uniformity.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143187179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new Co-based cathode with high performance for intermediate-temperature solid oxide fuel cells","authors":"Chaoran Zhou,&nbsp;Zhixian Liang,&nbsp;Hao Qiu,&nbsp;Shanshan Jiang,&nbsp;Wei Wang,&nbsp;Chao Su","doi":"10.1002/apj.3162","DOIUrl":"https://doi.org/10.1002/apj.3162","url":null,"abstract":"<p>Solid oxide fuel cells (SOFCs) as highly effective energy conversation devices have gained substantial recognition and research interest. The electrochemical properties of the traditional SOFCs are restricted by the sluggish reaction kinetics for the cathode material when lowering the operation temperature to below 600°C. In addition, the stability of the cathode at reduced temperatures is also a big challenge for the widely popularization of SOFC technology. Achieving high activities and stable ORR in the cathode is crucial for the development of SOFCs. The doping active metal method has been demonstrated as an effective approach to optimize the phase structure and improve the ORR activity of the cathode. Herein, we successfully develop an Ir-doped SrCoO_3 − δ (SrCo_0.98Ir_0.02O_3 − δ, SCI) cathode for SOFCs. SCI exhibits a low area-specific resistance (ASR) of 0.057 Ω cm² at 650°C, ~ 44% lower than 0.102 Ω cm² of Ir-free SrCoO_3 − δ. The Ni–Sm_0.2Ce_0.8O_1.90 (SDC) anode-supported fuel cell with SDC electrolyte and SCI cathode obtains an excellent output performance (e.g., 1,128 mW cm⁻² at 650°C). The desired results underscore the feasibility of the Ir-doping strategy as an optimized method for the exploitation of advancing cathode in SOFCs.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143187090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficient activation of N and S co-doped magnetic biochar for peroxomonosulfate degradation of tetracycline","authors":"Xi Zhang,&nbsp;Haoyuan Zheng,&nbsp;Hong Xu,&nbsp;Jie Huang,&nbsp;Qianyuan Mo,&nbsp;Guishang Sheng","doi":"10.1002/apj.3156","DOIUrl":"10.1002/apj.3156","url":null,"abstract":"<p>N-S co-doped magnetic biochar (NSMBC) was synthesized by a two-step pyrolysis technique and used for the degradation of tetracycline (TC) by activated persulfate (peroxomonosulfate [PMS]). Batch experiments showed that the pyrolysis temperature and doping ratio affected the catalytic performance of NSMBC. The degradation rate of TC in the NSMBC/PMS system prepared at 350°C with a doping ratio of 33% was up to 94.50%, and the system exhibited strong pH adaptability and resistance to environmental interference. The results of free radical burst and electron paramagnetic resonance (EPR) spectroscopy experiments indicated the free radical pathway (SO₄^•−) for TC degradation. In addition, NSMBC has good stability and excellent magnetic properties favorable for separation and recovery. This study not only provides a new idea for the synthesis of efficient and stable catalysts but also provides a green pathway for the resourceization of pomelo peel waste.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sulfonated carbon–based heterogeneous acid catalysts in direct biomass redox flow fuel cell: A review","authors":"Boniface Ifeanyi Ugwu,&nbsp;Christogonus Oduney Akalezi,&nbsp;Innocent Sunday Ike,&nbsp;Toochukwu Eqwutosi Ogbulie,&nbsp;Emeka Emmanuel Oguzie","doi":"10.1002/apj.3158","DOIUrl":"10.1002/apj.3158","url":null,"abstract":"<p>This review focused on the potential applications of sulfonated carbon–based heterogeneous acid catalysts for the hydrolysis of lignocellulosic biomass (LCB) fuel feedstock and the development of membrane electrode assembly (MEA) for the direct biomass redox flow fuel cell (DBRFFC). LCBs are hydrolysed to yield simple sugars, which are subsequently oxidized over catalysts in the anode tank of the DBRFFC to generate electricity. Ferric chloride used as a catalyst in the DBRFFC is not efficient for glucose production from LCB, such that the power performance of the DBRFFC is affected during glucose oxidation due to low glucose yield from LCB for electron generation. Sulfonated carbon–based solid acid catalysts (SCSACs) have been established as efficient catalysts for the hydrolysis of LCB and as metal catalyst supports for the fabrication of MEA for further oxidation of glucose and its oxidation by-products. These capabilities of SCSACs can be explored and applied to significantly improve the power output of the DBRFFC through efficient hybrid catalyst design. There is still a scarcity of literature on this subject and their combination with ferric chloride to enhance glucose yield and oxidation in DBRFFC. This gap was filled by discussing the various types of sulfonated carbon–based catalysts, highlighting their synthesis routes, and their applications in organic compound synthesis, and membrane electrode development in DBRFFC. The knowledge derived will certainly be beneficial to researchers willing to improve the performance of DBRFFC through molecular catalyst design and electrode membrane development for application in DBRFFC.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142253093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced peroxidase-like activity of MnFe2O4 nanoparticles on halloysite nanotubes for uric acid detection","authors":"Hengxia Shen,&nbsp;Zhenbo Xiang,&nbsp;Anfang Dang","doi":"10.1002/apj.3143","DOIUrl":"10.1002/apj.3143","url":null,"abstract":"<p>Nanozymes have significantly advanced sensing assays by replicating native enzyme functions. However, designing nanozymes with high catalytic activity and easy recyclability remains challenging. The study presented here has resulted in the development of a highly efficient and sensitive colorimetric system for the detection of uric acid, utilizing MnFe₂O₄@HNTs—a novel composite material consisting of MnFe₂O₄ loaded onto halloysite nanotubes. These nanocomposites exhibited outstanding peroxidase-like activity and attractive magnetic properties. The catalytic efficiency of the MnFe₂O₄@HNTs in the oxidation of 3,3′,5,5′-tetramethylbenzidine, in the presence of H₂O₂, was remarkable, leading to a distinct color change from colorless to blue. A linear relationship was observed between absorbance and UA concentration in the range of 1–20 μM, with a detection limit as low as 52 nM. Mechanistic investigations revealed that reactive oxygen species (ROS), specifically singlet oxygen (¹O₂), were generated through the decomposition of H₂O₂, which is responsible for the peroxidase-like activity demonstrated by the MnFe₂O₄@HNTs. The method showed minimal interference from serum substances and high selectivity. Magnetic MnFe₂O₄ allowed easy separation and maintained over 95% activity after seven reuse cycles. The developed assay was successfully applied to the detection of uric acid in human serum, achieving recoveries greater than 98.60%. This research significantly advances the design of recyclable high-performance nanozymes and establishes an effective colorimetric sensing platform for UA detection in clinical samples, potentially improving diagnostic tools for healthcare applications.</p>","PeriodicalId":49237,"journal":{"name":"Asia-Pacific Journal of Chemical Engineering","volume":"20 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}