Journal of the Taiwan Institute of Chemical Engineers最新文献

{"title":"Buoyancy-driven nano-suspension subject to interstitial solid/nanofluid heat transfer coefficient: Role of local thermal non-equilibrium (LTNE)","authors":"Marouan Kouki ,&nbsp;Amjad Ali Pasha ,&nbsp;M.K. Nayak ,&nbsp;Salem Algarni ,&nbsp;Talal Alqahtani ,&nbsp;Kashif Irshad","doi":"10.1016/j.jtice.2024.105702","DOIUrl":"10.1016/j.jtice.2024.105702","url":null,"abstract":"<div><h3>Background</h3><p>Because of the prominent temperature discrepancy between fluid and solid in porous material, local thermal equilibrium (LTE) is not suitable in case of high-conductivity foams and electronic equipment. In view of above situation, Darcy-Brinkman-Forchheimer model subject to local thermal non-equilibrium (LTNE) is implemented. LTNE technique finds real world applications include groundwater pollution, geothermal extraction, microwave heating, industrial separation process, and transpiration cooling featuring with porous structure. The present study aims at the investigation of the entropy and hydrothermal characteristics of buoyancy-driven TiO₂-H₂O nanofluid inside a cross-shaped domain embodying two hot and cold rings influenced by LTNE.</p></div><div><h3>Methods</h3><p>Finite element method (FEM) has been considered to solve the dimensionless form of governing equations.</p></div><div><h3>Significant findings</h3><p>Amplification of interstitial solid/nanofluid heat transfer coefficient accounts for the intensification of streamlines, velocities, and diminution of isothermal lines in both nanofluid and solid matrix phases under the influence of LTNE. Strengthening of medium porosity whittles down entropy due to thermal effects in both nanofluid and solid phases, and that ameliorates entropy due to fluid friction and porous medium irreversibilities. Local and average Nusselt numbers in nanofluid phase reduce by 29.31 %, 20.72 %, 17.16 %, and 14.78 % while that in solid phase decays by 13.18 %, 7.63 %, 4.9 %, and 2.8 % for rise in εfrom 0.1 to 0.3, 0.3 to 0.5, 0.5 to 0.7, and 0.7 to 0.9, respectively. Introduction of Darcy-Brinkman-Forchheimer model subject to LTNE yielded better results in hydrothermal behavior of TiO₂-H₂O nanofluid inside a cross-shaped domain emplacing two hot and cold rings than earlier published results.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105702"},"PeriodicalIF":5.5,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142047815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of substitution on corrosion inhibition properties of 4-(substituted fluoro, chloro, and amino) Benzophenone derivatives on mild steel in acidic medium: A combined Electrochemical, surface characterization and theoretical approach","authors":"Sanmugapriya Ravi,&nbsp;Silda Peters,&nbsp;Arockia Selvi J","doi":"10.1016/j.jtice.2024.105726","DOIUrl":"10.1016/j.jtice.2024.105726","url":null,"abstract":"<div><h3>Background</h3><p><strong>:</strong> In this study, three mono-substituted Benzophenone (BP) derivatives, 4-Fluorobenzophenone (4-F.BP), 4-Chlorobenzophenone (4-C.BP), and 4-Aminobenzophenone (4-A.BP) were investigated using a combined electrochemical, surface characterization and theoretical approach.</p></div><div><h3>Methods</h3><p><strong>:</strong> In experiment, the effectiveness of 4-F.BP, 4-C.BP, and 4-A.BP in inhibiting mild steel corrosion in a 1 N HCl solution were investigated using gravimetric measurements at several temperatures (303–333 K), electrochemical measurements (Potentiodynamic Polarization (PDP), and Electrochemical Impedance Spectroscopy (EIS)), UV–visible analysis, Surface morphology test (SEM and EDAX analysis, AFM analysis, water contact angle measurement, XPS analysis) as well as theoretical studies.</p></div><div><h3>Significant findings</h3><p><strong>:</strong> Increase in the inhibitor concentrations (160, 200, 240 and 280 ppm) exhibited a maximum percentage of inhibition efficiency (IE %) of 83.75 %, 88.75 %, and 93.75 % for 280 ppm of 4-F.BP, 4-C.BP, and 4-A.BP respectively at 303 K. However, with increase in the temperature from 303 to 333 K, IE % furthermore reduced to 52.41 %, 57.24 %, and 66.20 % at 333 K. The potentiodynamic polarization plots revealed that all molecules acted as mixed-type corrosion inhibitors and had an exceptional ability to inhibit the anodic reaction. Moreover, Scanning Electron Microscopy (SEM), Atomic force microscopy (AFM), and Contact angle measurement (CAM) confirms the formation of protective layer on the metal surface by the chosen inhibitors. The X-ray Photoelectron Spectroscopy (XPS) data confirms the bonding interaction between the functional groups and the metal surface. Furthermore, Density Functional Theory (DFT) calculation and Molecular Dynamics simulations (MD) were carried out to understand inhibition's molecular/atomic mechanisms. In summary, the suggested benzophenone derivatives are effective and economical anticorrosion agents for mild steel surfaces exposed to aggressive environments.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105726"},"PeriodicalIF":5.5,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142057964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Facile fabrication of bismuth oxide anchored graphene oxide for the effective electrochemical sensing of diuron","authors":"Nandhini Munusamy ,&nbsp;Francis Packiaraj Don Disouza ,&nbsp;Shen-Ming Chen ,&nbsp;Kumar Krishnan ,&nbsp;Mukesh Kumar Dharmalingam Jothinathan ,&nbsp;B. Prakash","doi":"10.1016/j.jtice.2024.105708","DOIUrl":"10.1016/j.jtice.2024.105708","url":null,"abstract":"<div><h3>Background</h3><p>Diuron (DU), a weed controller widely used in the agricultural industry, prolonged conception of this agrochemical residue contaminated with environmental water bodies and soil sources could cause an acute impact on the human health system. This work utilized the electrochemical determination technique due to their rapid detection, outstanding sensitivity, and economical purpose.</p></div><div><h3>Methods</h3><p>The electrochemical behavior of DU at the γ-Bi₂O₃ microplates interconnected with sheet-like graphene oxide (GO) as a surface-modified electrode was scrutinized by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The surface-modified γ-Bi₂O₃/GO/GCE elucidates superior electrocatalytic performance towards the irreversible oxidation response of diuron than the other surface-modified electrode in the phosphate buffer solution of 0.1 M.</p></div><div><h3>Significant findings</h3><p>The γ-Bi₂O₃/GO/GCE electrode displayed an extensive detection range of 0.1–631 µM with a 0.751 µM lower detection limit furthermore, noticeable 0.0280 µA µM^-1 cm^-2 sensitivity for diuron determination. In addition, the DPV experiment exposed that the γ-Bi₂O₃/GO/GCE electrode achieves stupendous selectivity, durability, and acceptable feasibility of the real-time samples.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105708"},"PeriodicalIF":5.5,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142047817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrosion inhibition assessment of a sustainable inhibitor from the weed plant (Pouzolzia zeylanica L.) on SS-410 surface in 0.5 M HCl acidic medium","authors":"Vibha Tripathi ,&nbsp;Dwarika Prasad ,&nbsp;Rajnish Maithani ,&nbsp;Brahim El Ibrahimii","doi":"10.1016/j.jtice.2024.105693","DOIUrl":"10.1016/j.jtice.2024.105693","url":null,"abstract":"<div><h3>Background</h3><p>The research has looked into the potential of plant extracts as natural corrosion inhibitors as an alternative to synthetic ones. The study aims to investigate the ability of the weed plant <em>Pouzolzia zeylanica</em> L. extract (<em>PZE</em>) to prevent corrosion of stainless steel-410 in a 0.5 M HCl acidic medium.</p></div><div><h3>Method</h3><p>In this work, the leaf extract of <em>PZE</em> is prepared in water, and the functional activity of the prepared <em>PZ</em> water extract (<em>PZE)</em>is evaluated using various techniques. Both electrochemical and gravimetric techniques are employed in this study. The inhibitor from <em>PZ</em> inhibits the anodic region on the SS-410 surface active sites through straightforward adsorption. Experimental techniques such as UV–visible spectroscopy, FTIR, LC-MS, SEM, AFM, EDX, EIS, and computational studies demonstrate the formation of protective layers under inhibiting conditions. The gravimetric data confirms monolayer adsorption, following the Langmuir adsorption isotherm.</p></div><div><h3>Significant findings</h3><p>The data obtained demonstrate that when SS-410 is immersed directly in a corrosive solution containing dissolved inhibitor molecules, it effectively prevents corrosion. Therefore, increasing the concentration of this chemical improves its inhibitory efficiency. Indeed, the PZ inhibitor achieved a favourable experimental outcome with an efficacy of 95 % at 400 mg/L in 0.5 M HCl. Based on polarization analysis, the corrosion inhibitor exhibits anodic nature for SS-410 in 0.5 M HCl.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105693"},"PeriodicalIF":5.5,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142047816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Generative Convolutional Monitoring Method for Online Flooding Recognition in Packed Towers","authors":"Yi Liu ,&nbsp;Yuxin Jiang ,&nbsp;Zengliang Gao ,&nbsp;Kaixin Liu ,&nbsp;Yuan Yao","doi":"10.1016/j.jtice.2024.105719","DOIUrl":"10.1016/j.jtice.2024.105719","url":null,"abstract":"<div><h3>Background</h3><p>Data-driven methods play an important role in monitoring the liquid flooding process for ensuring the efficient and safe operation of packed towers. However, their online recognition performance is often limited due to the imbalanced and nonlinear nature of the flooding data.</p></div><div><h3>Method</h3><p>In this work, a generative convolutional monitoring (GCM) method is proposed for online flooding recognition. Firstly, a generative model by integrating variational autoencoder with Wasserstein generative adversarial networks is designed to generate information-rich flooding images for enlarging the diversity of the dataset. Secondly, the convolutional neural network is employed for the online recognition of flooding. Finally, feature visualization explains the details of the GCM method in terms of feature extraction. Consequently, the proposed method extracts nonlinear characteristics while overcoming the difficulties associated with unbalanced data.</p></div><div><h3>Significant findings</h3><p>Experiments on a lab-scale packed tower demonstrate the feasibility of the proposed approach. The flooding state in packed towers can be online detected.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105719"},"PeriodicalIF":5.5,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142040835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrolytic biodiesel production from spent coffee grounds: Optimization through response surface methodology and artificial neural network","authors":"Umaiyambika Neduvel Annal ,&nbsp;Vaithiyanathan. R ,&nbsp;Arunodhaya Natarajan ,&nbsp;Vijayalakshmi Rajadurai ,&nbsp;Paskalis Sahaya Murphin Kumar ,&nbsp;Yuan-Yao Li","doi":"10.1016/j.jtice.2024.105697","DOIUrl":"10.1016/j.jtice.2024.105697","url":null,"abstract":"<div><h3>Background</h3><p>The disposal of waste spent coffee grounds (SCG) presents a pressing environmental concern, necessitating effective pre-treatment strategies to mitigate potential damage. Transesterification emerges as a viable solution for converting SCG lipids into biodiesel, offering both environmental and economic benefits.</p></div><div><h3>Methods</h3><p>In this study, the utilization of SCG as a renewable feedstock for biodiesel production through an innovative electrolysis process has been explored, aiming to address the dual challenges of waste management and sustainable energy production. To obtain maximum conversion of SCG oil to biodiesel, a comprehensive analysis of the fatty acid profile using Gas Chromatography-Mass Spectrometry (GC–MS), was conducted allowing for precise characterization of lipid content. Additionally, Fourier Transform Infrared (FTIR) spectroscopy was employed to categorize functional groups and Nuclear Magnetic Resonance (¹H NMR) spectroscopy was utilized to analyze the molecular structure of the SCG oil. Optimization of process parameters namely, catalyst concentration, electrolysis time, and direct current (DC) voltage was performed using Response Surface Methodology (RSM) and Artificial Neural Network (ANN) techniques. The ANN model, with its ability to capture complex nonlinear relationships, was particularly effective in identifying the optimal combination of parameters, thereby maximizing biodiesel yield.</p></div><div><h3>Significant findings</h3><p>The extracted SCG oil was characterized using FTIR, GC–MS and ¹H NMR analysis. The GC- MS analysis of bio-oil has reported 44.6 % Linoleic acid, 31.6 % Palmitic acid. The extracted oil had got significant amount of key saturated and unsaturated fatty acid making it suitable for transesterification process. Through ANN, the optimal combination of parameters for electrolytic transesterification i.e.,0.75 wt% catalyst loading, 2 h electrolysis time, and 40 V DC voltage, yielded the highest biodiesel production (98.32 wt.%). Comparative analysis indicated superior performance of the ANN model (R² = 0.9931, MAE = 0.123) over RSM (R² = 0.9636, MAE = 1.546). The artificial neural network (ANN) provided a more accurate forecast of the process yield; however, the RSM model effectively predicted the interactions and significance of the pyrolysis factors. The artificial neural network (ANN) provided a more accurate forecast of the process yield; however, the RSM model effectively predicted the interactions and significance of the pyrolysis factors. Biodiesel characterization via FTIR and ¹H NMR analysis showed physiochemical properties within standard limits for SCG biodiesel.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105697"},"PeriodicalIF":5.5,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142021515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preparation and properties of multiphase composite enhanced functional organosilicon nano-coatings","authors":"Peipei Lu ,&nbsp;Yiyao Wang ,&nbsp;Hongfeng Wang ,&nbsp;Wen Zhou ,&nbsp;Nianshun Zhao ,&nbsp;Shengrong Liu","doi":"10.1016/j.jtice.2024.105717","DOIUrl":"10.1016/j.jtice.2024.105717","url":null,"abstract":"<div><h3>Background</h3><p>To improve the inherent stability and environmental compatibility of traditional organosilicon coatings, nano-reinforced composite materials were innovatively designed and synthesized to improve the performance of organosilicon coatings.</p></div><div><h3>Methodology</h3><p>The silicon dioxide (SiO₂) clusters on the surface of graphene oxide (GO) incorporated with calcium carbonate (CaCO₃) and dicyclohexylamine nitrite (Dn) nanocomposites (GO@SiO₂/CaCO₃/Dn) were prepared successfully. Then nanocomposites were integrated into the coating matrix to comprehensively assess their effects on morphology, mechanics, corrosion resistance, and anti-fouling properties.</p></div><div><h3>Significant findings</h3><p>Scanning Electron Microscopy (SEM) observations revealed that 4.0 wt.% of the nanocomposite reinforcement led to stratification within the organosilicon coating. The mechanical properties test shows that the hardness, bonding strength, and maximum impact resistance of SiNC2.0 coating is 10.3 HV, 2.8 MPa, and 75 kg·cm, respectively. Electrochemical assessments confirmed that SiNC2.0 displayed superior corrosion resistance, with a corrosion potential (E_corr) of 0.199 V and a corrosion current density (I_corr) of 7.308 × 10^–6 A/cm². Furthermore, the surface free energy of the nano-coatings is calculated in the range of 20–30 mN/m by contact angle measurement, indicating the anti-fouling and self-cleaning of the organosilicon nano-coatings. Long-term immersion in natural lake water further confirms the stability and durability of the SiNC2.0 coating in real environments.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105717"},"PeriodicalIF":5.5,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142011572","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metallic silver-alloyed copper oxide electro-catalyst: A high-sensitivity platform for propoxur insecticide detection in food samples","authors":"Pulikkutty Subramaniyan ,&nbsp;Yamunadevi Kandeepan ,&nbsp;Tse-Wei Chen ,&nbsp;Shen-Ming Chen ,&nbsp;Manal Abdulaziz Binobead ,&nbsp;Mohamed Farouk Elsadek ,&nbsp;Mohamed Soliman Elshikh","doi":"10.1016/j.jtice.2024.105707","DOIUrl":"10.1016/j.jtice.2024.105707","url":null,"abstract":"<div><h3>Background</h3><p>Carbamate insecticides find widespread use in crop protection. Propoxur (PPX) is a type of pesticide classified as a carbamate insecticide, commonly used to control pests in both agriculture and households. The chances of these compounds being present are quite high. For this reason, it is imperative to perform a quantitative analysis of food samples to assess insecticides.</p></div><div><h3>Methods</h3><p>The development of a sensitive sensor using plate-like metallic silver alloyed copper oxide (m-Ag-CuO) allowed for the detection of PPX in food samples. The physical characteristics of m-Ag-CuO were determined through the use of microscopic and spectroscopic techniques. With its high sensitivity and exceptional selectivity, the electrochemical sensing method provides rapid and accurate results, making it a preferred choice for detect PPX.</p></div><div><h3>Significant findings</h3><p>The fabricated sensor showed impressive performance under optimal experimental conditions, with a limit of detection (LOD), limit of quantification (LOQ) and a sensitivity are 0.62 ng/L and 1.9 ng/L, and 0.67 µA (ng/L)^–1 cm^–2. We assessed the functionality and suitability of the sensor through selective study and analysis of food samples, achieving a recovery rate of 95 – 102 %. This indicates that the sensor successfully adapted to analyze PPX in different food products.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105707"},"PeriodicalIF":5.5,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142006725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improved photocatalytic activity of rGO modified Mn(VO3)2 nanorods for the degradation of rifampicin: Insight into mechanism, pathway and by-product toxicity evaluation","authors":"V. Subhiksha ,&nbsp;L. Sruthi ,&nbsp;J.P. Steffy ,&nbsp;Asad Syed ,&nbsp;Abdallah M. Elgorban ,&nbsp;Islem Abid ,&nbsp;Ling Shing Wong ,&nbsp;S. Sudheer Khan","doi":"10.1016/j.jtice.2024.105692","DOIUrl":"10.1016/j.jtice.2024.105692","url":null,"abstract":"<div><h3>Background</h3><p>The discharge of rifampicin into surface and groundwaters leads to the emergence of antibiotic resistant bacteria which could possess a detrimental threat to human health and aquatic life.</p></div><div><h3>Methods</h3><p>In this work, rod shaped Mn(VO₃)₂ was synthesised by simple co-precipitation method and it was deposited over rGO to enhance the photocatalytic degradation of rifampicin under visible light irradiation.</p></div><div><h3>Findings</h3><p>The study highlighted the enhanced photocatalytic degradation of rifampicin (RFP) by rGO/Mn(VO₃)₂ nanocomposites (NCs) and it was 99.2 % at pH 7 and the photocatalyst was stable even after 6th cycle. The total organic carbon removal was determined to be 97.1 %. To achieve this, rod shaped Mn(VO₃)₂ was prepared and deposited over rGO and it was confirmed by SEM and TEM analysis. While XRD studies confirmed the purity of the synthesized materials, XPS and Raman spectroscopy validated their chemical states and bonding nature respectively. BET and BHJ revealed the enhanced surface area and mesoporous nature of the NCs. Further, PL studies indicated the reduced charge carrier recombination in the NCs. The dominant radicals involved in the degradation was identified to be O₂^•− and ^•OH. The degraded intermediates were identified and the possible degradation pathway was proposed by using GC–MS/MS analysis. The by-product toxicity was assessed by ECOSAR program and were found to be non-toxic to algae, Daphnia and fish. The study demonstrates the promising potential of rGO/Mn(VO₃)₂ NCs with improved behaviour and stability for environmental application.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"165 ","pages":"Article 105692"},"PeriodicalIF":5.5,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142006724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"pH-responsive and NIR photothermal self-healing coating for metal protection","authors":"Chengbin Guo ,&nbsp;Chen Huang ,&nbsp;Yubo Lian ,&nbsp;Zhenyu Chen","doi":"10.1016/j.jtice.2024.105703","DOIUrl":"10.1016/j.jtice.2024.105703","url":null,"abstract":"<div><h3>Background</h3><p>Organic coating has been the most efficient strategy to protect metals. However, organic coatings may be damaged, thereby reducing or even losing their protective performance.</p></div><div><h3>Methods</h3><p>A novel pH-responsive and near-infrared photothermal composite coating was fabricated to improve the anti-corrosion performance of shape memory coating. The core-shell-like microcapsule was prepared by mesoporous silica nanoparticles assembled with a polydopamine (PDA) shell and loaded with benzotriazole (BTA) inhibitors. The mesoporous silica nanoparticles acted as the nanocarrier to load the BTA molecules.</p></div><div><h3>Significant findings</h3><p>The mesoporous silica nanoparticles acted as the nanocarrier to load the BTA molecules, and the PDA shell has the pH-responsive property and acts as the gatekeeper to control the BTA release. Under NIR irradiation, the PDA shell not only facilitates the release of corrosion inhibitors to suppress the corrosion activity but also raises the coating temperature (above 65 °C) to repair the coating scratches. The micromorphology, chemical composition, and element valences of the prepared nanocapsules were confirmed by transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS), respectively. The anti-corrosion performance of the composite coating was investigated by electrochemical impedance spectroscopy (EIS) measurements. These results demonstrated that the prepared nanocapsules have the pH-responsive release property (acid&gt;neutral&gt;alkaline) and NIR photothermal ability. The coating resistance of composite coating with 1.0 wt.% MSN@BTA@PDA loading could be maintained above 108 Ω cm² after 30 days of accelerated corrosion test, which was two orders of magnitude greater than the pure EP coating. Furthermore, the scratched composite coatings could be healed after 300 s of NIR irradiation. These pH-responsive and NIR curing endowed the composite coating with a short-time self-healing ability and an excellent anti-corrosion performance.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"164 ","pages":"Article 105703"},"PeriodicalIF":5.5,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142002476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}