Journal of the Taiwan Institute of Chemical Engineers最新文献

{"title":"Granger causality analysis using error correction model for root cause diagnosis in non-stationary industrial processes","authors":"Rui Chen ,&nbsp;Jia-Lin Kang ,&nbsp;Jian-Guo Wang ,&nbsp;Yuan Yao ,&nbsp;Li-Lan Liu ,&nbsp;Zhong-Tao Xie","doi":"10.1016/j.jtice.2025.106288","DOIUrl":"10.1016/j.jtice.2025.106288","url":null,"abstract":"<div><h3>Background</h3><div>Non-stationary characteristics commonly arise in multivariate time series after faults occur. However, existing Granger-based root cause diagnosis (RCD) methods struggle to address the challenges posed by such characteristics.</div></div><div><h3>Methods</h3><div>To overcome this limitation, a novel Granger causality-based method integrating an error correction model derived from cointegration analysis has been developed. The approach begins with Johansen cointegration analysis on the non-stationary multivariate time series to verify whether there is a cointegration relationship among them. To avoid spurious regression, each variable in the full and reduced Granger models is differenced according to its integration order. Because differencing can obscure long-run relationships, we recapture them with cointegration analysis and add an error-correction term that measures departures from equilibrium in the previous period. We then test the resulting prediction residuals for Granger causality significance, yielding a reliable causal diagram of the fault propagation.</div></div><div><h3>Significant findings</h3><div>The proposed method’s effectiveness is demonstrated through a numerical simulation, the benchmark Tennessee Eastman process, and a real-world case involving a coal conveyor motor fault. These examples illustrate its robustness and applicability in diagnosing faults in complex industrial processes.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"175 ","pages":"Article 106288"},"PeriodicalIF":5.5,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144633829","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":"Renewable Co@MOF-808(C) catalyzed PMS for the efficient degradation of 2,4-D: Performance and mechanism","authors":"Bowen Huang ,&nbsp;Jiamiao Li ,&nbsp;Renjuan Wang ,&nbsp;Wenbin Hu ,&nbsp;Panpan Ren ,&nbsp;Hui Xu ,&nbsp;Jin Shao ,&nbsp;Yun Kong ,&nbsp;Qi Chen","doi":"10.1016/j.jtice.2025.106291","DOIUrl":"10.1016/j.jtice.2025.106291","url":null,"abstract":"<div><h3>Background</h3><div>The 2,4-Dichlorophenoxyacetic acid (2,4-D) is widely in agriculture, forestry, and other areas, while it causes environmental pollution problems due to the high chemical stability and poor biodegradability.</div></div><div><h3>Methods</h3><div>A novel Co₃O₄-loaded MOF-derived carbon catalyst (Co@MOF-808(C)) was prepared and its catalytic performance of peroxymonosulfate (PMS) for 2,4-D degradation was evaluated.</div></div><div><h3>Significant findings</h3><div>Results indicated Co@MOF-808(C) could effectively degrade 2,4-D by catalyzing PMS. Under the selected conditions of 500 mg·L⁻¹ Co@MOF-808(C), 3 mM PMS, 45 °C, and without pH adjusting, a remarkable degradation rate (97.3 %) and high mineralization rate (88.7 %) were obtained as 2,4-D concentration was 50 mg·L⁻¹. In addition, the existence of H₂PO₄⁻, CO₃²⁻ (5 mM), or SO₄²⁻ (5 mM) could promote the catalytic degradation of 2,4-D, while other ions (including Cl⁻, NO₃⁻, and humic acid) and higher concentration of CO₃²⁻ or SO₄²⁻ inhibited 2,4-D degradation. Reusability experiment of Co@MOF-808(C) indicated the degradation rate was still remained at 89.4 % after five cycles. Quenching experiment, ESR and XPS results demonstrated SO₄⁻· dominated a crucial role in 2,4-D removal and the Co²⁺/Co³⁺ cycle drove the PMS activation. Furthermore, the LC-MS results illustrated the potential degradation pathway for 2,4-D mainly included decarboxylation, dechlorination, hydroxylation, and ring cleavage; and the ecotoxicological results showed an obvious reduction in the toxicity of 2,4-D after degradation. In summary, the stable chemical properties and excellent catalytic effect of Co@MOF-808(C) offered a potential application for 2,4-D elimination form aquatic environment.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"175 ","pages":"Article 106291"},"PeriodicalIF":5.5,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632289","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":"Investigation on the decomposition kinetics, thermal safety and mechanism of the nitration products of m-xylene: experiment and DFT calculations","authors":"Juncheng Jiang ,&nbsp;Hang Yao ,&nbsp;Jialei Huang,&nbsp;Zhiquan Chen,&nbsp;Lei Ni,&nbsp;Yong Pan","doi":"10.1016/j.jtice.2025.106287","DOIUrl":"10.1016/j.jtice.2025.106287","url":null,"abstract":"<div><div>Background: Nitro-m-xylene (NMX) is a critical raw material and intermediate widely used in the synthesis of fine chemical products and energetic materials. A clear understanding of the thermal hazards and safety performance of NMX is especially critical for practical applications in chemical processes.</div><div>Methods: Calorimetric experiments combined with theoretical chemical calculations were applied to investigate the thermal decomposition and kinetic behavior of NMX.</div><div>Significant findings: The average apparent activation energies for the decomposition of NMX, the nitration products of m-xylene, calculated using the DAEM, Starink and Friedman methods were 141.1 kJ/mol, 141.4 kJ/mol and 144.9 kJ/mol, respectively. The most probable decomposition mechanism functions were determined by the master plots method at conversions of 0.05–0.50 and 0.50–0.95 for modes A4 and F2, separately. Furthermore, calculations of thermal safety and thermodynamic parameters revealed the excellent thermal stability of the nitration products, which require an external heat source to trigger decomposition. The C-NO₂ bond was identified as a possible initial decomposition site for 4-NMX by theoretical bond order and dual descriptor analysis. The possible decomposition pathways for 4-NMX were deduced by density functional theory, and alkyl compounds were the main gaseous products, followed by small molecules containing O and N.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"175 ","pages":"Article 106287"},"PeriodicalIF":5.5,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623742","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":"Numerical analysis of melting heat transfer for radiative and dissipative flow of hybrid nanofluid with entropy optimization","authors":"Chandrakanta Parida ,&nbsp;Fahad Saleh Almubaddel ,&nbsp;Shaimaa A.M. Abdelmohsen ,&nbsp;Abdulaziz Bentalib ,&nbsp;Barno Abdullaeva ,&nbsp;Debashis Mohanty ,&nbsp;Ganeswar Mahanta ,&nbsp;Sachin Shaw","doi":"10.1016/j.jtice.2025.106271","DOIUrl":"10.1016/j.jtice.2025.106271","url":null,"abstract":"<div><h3>Background</h3><div>This paper investigates the involvement of nanoparticle morphologies on heat transmission and fluid motion through melting heat surfaces, focusing on the optimization of heat transfer in stagnation point flows by examining the interplay between non-linear thermal radiation and melting points.</div></div><div><h3>Methods</h3><div>Two nanoparticles, <em>Fe</em>₃<em>O</em>₄ and <em>MgO</em>, in spherical, cylindrical, and laminar shapes within <em>H</em>₂<em>O</em> base fluids are studied for their relevance to heating and cooling industries, such as petrochemicals, nuclear reactors, and liquid chromatography. The study addresses melting heat conditions, partial velocity slip, and the role of the melting effect on heat transport properties, while also considering the magnetic influence on hybrid nanofluids with varying densities using the Roseland approximation.</div></div><div><h3>Significant findings</h3><div>Through similarity transformations, partial differential equations are simplified into ordinary differential equations, and the Akbari-Ganji approach validates numerical results, revealing the interactions of momentum, energy, and concentration. The findings show that laminar-shaped <em>MgO</em> − <em>Fe</em>₃<em>O</em>₄/<em>H</em>₂<em>O</em> significantly enhances the temperature profile Θ(ξ) with increasing concentrations φ₁,φ₂, due to superior thermal conductivity, which also raises the velocity profile. The hybrid nanofluid outperforms others, with higher Brinkman numbers and radiation reducing system irreversibility, and resulting in minimal entropy production compared to single nanofluids.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"175 ","pages":"Article 106271"},"PeriodicalIF":5.5,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144632287","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":"Orange yellow S chromophore-functionalized mesoporous silica for ultrasensitive Cu2+ detection and removal","authors":"Mona Saad Binkadem ,&nbsp;Abdullah Akhdhar ,&nbsp;Abdullah Saad Al‐Bogami ,&nbsp;Waleed A El-Said ,&nbsp;Emad Elshehy","doi":"10.1016/j.jtice.2025.106269","DOIUrl":"10.1016/j.jtice.2025.106269","url":null,"abstract":"<div><div>Excessive copper (Cu²⁺) in water poses severe health risks, demanding efficient detection and removal solutions. This study presents a reusable, high-performance optical sensor based on a cubic mesoporous silica monolith (CMM) functionalized with Orange Yellow S dye (CMM-OYS) for selective Cu²⁺ adsorption and sensing. The material, synthesized via direct templating, features a high surface area (380.5 m²/g) and uniform 7.11 nm mesopores, enhancing Cu²⁺ capture. Comprehensive characterization (SEM, TEM, XPS, SAXS, EDX, BET) confirmed its structural integrity. At pH 6.0, CMM-OYS achieved 86.8 mg/g adsorption capacity and 94.8 % removal efficiency, outperforming competitors. A citrate-thiosulfate-tartrate masking system ensured exceptional selectivity against 5 ppm interfering ions. The sensor remained stable for five cycles with only 5 % efficiency loss and successfully extracted Cu²⁺ from e-waste (87.8 % recovery). With a detection limit of 60 µg/L and linear range of 50–500 µg/L, CMM-OYS offers a cost-effective, sustainable solution for trace Cu²⁺ monitoring and remediation in environmental and industrial applications.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"175 ","pages":"Article 106269"},"PeriodicalIF":5.5,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604391","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":"Tuning annealing temperature to improve the sensing performance of single-walled carbon nanohorn-modified electrodes for simultaneous detection of ascorbic acid, dopamine, and uric Acid","authors":"Yu-Ching Weng ,&nbsp;Jing-Tong Lin ,&nbsp;Chin-Hung Lai","doi":"10.1016/j.jtice.2025.106296","DOIUrl":"10.1016/j.jtice.2025.106296","url":null,"abstract":"<div><h3>Background</h3><div>Ascorbic acid (AA), dopamine (DA), and uric acid (UA) are essential biomolecules in the human body, and abnormal concentrations can impact overall health. Therefore, developing a highly sensitive sensor capable of simultaneously detecting these three substances is crucial for disease prevention.</div></div><div><h3>Methods</h3><div>In this study, single-walled carbon nanohorns (SWCNHs) were heat-treated at different annealing temperatures (200 °C-1200 °C) and modified onto a glassy carbon electrode (GCE) for the simultaneous detection of AA, DA, and UA. The influence of annealing temperature on the surface properties of SWCNHs and their sensing performance was thoroughly analyzed.</div></div><div><h3>Significant findings</h3><div>Among them, SWCNHs annealed at 1200 °C exhibited more defects, enhancing the electrochemically active surface area and significantly improving detection performance. The 1200-SWCNH/GCE electrode demonstrated excellent peak separation. It showed a 3.3-, 3.6-, and 4.0-fold increase in sensitivity compared to the non-annealed electrode, with sensitivities of 0.078 μM/μA, 2.010 μM/μA, and 0.572 μM/μA for AA, DA, and UA, respectively. Additionally, this sensor demonstrated outstanding selectivity, reproducibility, and repeatability. In real sample analysis, the recovery rates for AA, DA, and UA ranged from 99.05 % to 104.03 %, validating the feasibility of 1200-SWCNH/GCE for practical applications.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"175 ","pages":"Article 106296"},"PeriodicalIF":5.5,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144614388","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":"Enhancing photocatalytic performance for H2O2 production and lignin CC bond cleavage via designing carbon nitride-based homojunction photocatalysts","authors":"Jie Xu,&nbsp;Qi Gao,&nbsp;Tianlin Ma,&nbsp;Ganglin Chen","doi":"10.1016/j.jtice.2025.106286","DOIUrl":"10.1016/j.jtice.2025.106286","url":null,"abstract":"<div><h3>Background</h3><div>Hydrogen peroxide (H₂O₂) is a commonly used oxidant in the pulp industry. Compared with traditional anthraquinone technology, photocatalytic H₂O₂ production is a green and sustainable approach. However, the efficiency of photocatalytic H₂O₂ production restricts its development. Meanwhile, lignin is often emitted as waste, which not only pollutes the environment but also wastes resources. Photocatalytic cleavage of lignin C<img>C bonds is an effective method to utilize lignin. However, the efficiency of lignin C<img>C bond cleavage is an urgent problem to be solved. It is essential to improve the photocatalytic efficiency of the above two reactions to promote the value-added utilization of lignin in the pulp industry.</div></div><div><h3>Methods</h3><div>A series of carbon nitride homojunction photocatalysts SCN/CCN-X have been successfully synthesized through a competitive self-assembly strategy. Some characterization techniques and photoelectric analysis revealed the elemental composition, microstructure, and photoelectric properties of the prepared photocatalyst.</div></div><div><h3>Significant Findings</h3><div>The experimental findings revealed that the SCN/CCN-1.5 photocatalyst has the best photocatalytic performance for H₂O₂ production and lignin C<img>C bond cleavage. SCN/CCN-1.5 offers the greatest photogenerated carrier separation efficiency and appropriate redox potential. Moreover, lignin C<img>C bond cleavage and photocatalytic H₂O₂ production have a significant synergistic effect. When the lignin model 1, 2-diphenylethanol was added to a solvent mixture composed of water and acetonitrile (15:5 v/v), the photocatalytic H₂O₂ production rate increased by 13.1 times. Mechanistic studies have shown that photocatalytic H₂O₂ production follows an indirect reaction mechanism. Photocatalytic lignin C<img>C bond cleavage conforms to the C_β radical mechanism. The hydroxyl radicals produced by the photocatalytic decomposition of H₂O₂ promote the lignin C<img>C bond cleavage.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"175 ","pages":"Article 106286"},"PeriodicalIF":5.5,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596567","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":"Heterogeneous Z-scheme CuO/ZnO aerogel photocatalyst for photocatalytic degradation of organic dye","authors":"Dhayanantha Prabu Jaihindh ,&nbsp;Yi-Feng Lin ,&nbsp;Li-Hsien Tseng ,&nbsp;Philip Anggo Krisbiantoro ,&nbsp;Kevin C.-W. Wu ,&nbsp;Kartikeya Shukla ,&nbsp;Masato Sone ,&nbsp;Tso-Fu Mark Chang ,&nbsp;Chun-Yi Chen","doi":"10.1016/j.jtice.2025.106281","DOIUrl":"10.1016/j.jtice.2025.106281","url":null,"abstract":"<div><h3>Background</h3><div>Although photocatalysis is an effective and eco-friendly technique for the degradation of persistent organic pollutants, fabricating an efficient photocatalyst with high photocatalytic performance, low cost, and reasonable recyclability is a major problem.</div></div><div><h3>Methods</h3><div>In this work, we synthesized Z-scheme CuO/ZnO aerogels (CuO/ZnO AG) via epoxide-triggered gelation and photo-deposition methods and used the materials as photocatalysts for the photocatalytic degradation of rhodamine B dye (RhB) in water. While the photodeposition of CuO on the surface of ZnO AG evidently decreased the recombination rate of electrons and holes, 20 wt. % was the optimum loading amount of CuO.</div></div><div><h3>Significant findings</h3><div>Over 20 wt. % CuO/ZnO AG, complete degradation of RhB was achieved within just 20 min with the reaction possessing a pseudo-first-order rate constant (<em>k</em>) of 0.0274 min^–1. It was revealed that although both hydroxyl (•OH) and superoxide (•O₂⁻) radicals contributed to the performance of the photocatalytic system, the contribution of •OH radicals in degrading RhB was much higher than •O₂⁻. Meanwhile, the reusability test showed that the material can be reused for the reaction for at least four runs without a significant decrease in photocatalytic activity.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"175 ","pages":"Article 106281"},"PeriodicalIF":5.5,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144587601","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":"Synergy between dual Z-scheme heterostructured Vo-Bi2WO6/Bi2S3/Ag2S@Chitosan for the effective degradation of fuchsin basic dye","authors":"Kusum Sharma ,&nbsp;Sonu Sonu ,&nbsp;Pardeep Singh ,&nbsp;Tansir Ahmad ,&nbsp;Savas Kaya ,&nbsp;Konstantin P. Katin ,&nbsp;Naveen Kumar ,&nbsp;Archana Singh ,&nbsp;Chaudhery Mustansar Hussain ,&nbsp;Pankaj Raizada","doi":"10.1016/j.jtice.2025.106265","DOIUrl":"10.1016/j.jtice.2025.106265","url":null,"abstract":"<div><h3>Background</h3><div>The current work investigates fuchsin basic photodegradation with visible light assistance as a potential solution for water contamination. The main goal is to modify the optoelectronic characteristic properties of Bi₂WO₆ through oxygen vacancy generation (OVs) and forming dual Z-scheme heterojunction with Ag₂S and Bi₂S₃.</div></div><div><h3>Methods</h3><div>The oxygen vacancy induced Bi₂WO₆/Ag₂S/Bi₂S₃ chitosan supported heterojunction system provided directional charge transfer channels with remarkable degradation efficacy of 99.80 % within 80 min. The dual Z-scheme heterojunction was fabricated using combined hydrothermal, co-precipitation and ultrasonic dispersion method. The Vo-Bi₂WO₆/Ag₂S/Bi₂S₃@chitosan system followed pseudo-first-order kinetics for FB degradation at 0.0552 min^-1 rate constant which is comparatively higher to bare counterparts.</div></div><div><h3>Significant findings</h3><div>The Vo-Bi₂WO₆/Ag₂S/Bi₂S₃@Chitosan system possessed 99.80 % degradation for FB, whereas the Vo-Bi₂WO₆/Ag₂S/Bi₂S₃, Vo-Bi₂WO₆/Ag₂S, Vo-Bi₂WO₆, Bi₂WO₆, Ag₂S, Bi₂S₃ possessed (96.08 %), (64.69 %), (39.64 %), (32.64 %), (23.49 %), (28.14 %), degradation rate for FB in 80 min. The density functional theory (DFT) investigations provided information on the energy bandgap analysis and structural configuration of the bare photocatalysts, which aligns well with the experimental results. Also, LC-MS analysis was employed to scrutinize the degraded products whilst, quenching experiment, and EPR results explicated the dual Z-scheme charge transfer mechanism. This work advances the rationally of designing oxygen vacancy-mediated dual Z-scheme system, which may have consequences for mitigating water pollution issues.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"175 ","pages":"Article 106265"},"PeriodicalIF":5.5,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581247","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":"Efficient solar-driven photodegradation of methylene blue dye and antibacterial activity of Bi₂X₃–TiO₂ (X = S or O?) nanocatalysts","authors":"T. Arunkumar ,&nbsp;Krishnakumar Balu ,&nbsp;Krishnamoorthy Shanmugaraj ,&nbsp;Mohammad Rafe Hatshan ,&nbsp;M. Shanthi","doi":"10.1016/j.jtice.2025.106266","DOIUrl":"10.1016/j.jtice.2025.106266","url":null,"abstract":"<div><h3>Background</h3><div>Titania (TiO₂) is a widely studied photocatalyst for wastewater treatment, but its efficiency is often limited by rapid charge recombination. Modifying TiO₂ with Bi₂S₃ can enhance visible light absorption and charge separation, improving its photocatalytic potential for pollutant degradation and antibacterial applications.</div></div><div><h3>Methods</h3><div>Bi₂X₃-TiO₂ (<em>X</em> = <em>S</em> or <em>O</em>?) composites with different Bi₂X₃ to TiO₂ ratios were synthesized via the sol-gel method. The catalysts were characterized using X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), Energy-Dispersive X-ray Spectroscopy (EDS), Ultraviolet–Visible Diffuse Reflectance Spectroscopy (UV-DRS), Photoluminescence Spectroscopy (PL), Fourier-Transform Infrared Spectroscopy (FT-IR), High-Resolution Transmission Electron Microscopy (HR-TEM), and X-ray Photoelectron Spectroscopy (XPS). Photocatalytic efficiency was evaluated by methylene blue degradation under solar light, and reaction kinetics were analyzed.</div></div><div><h3>Significant Findings</h3><div>Bi₂X₃-TiO₂ demonstrated superior photocatalytic activity compared to pure TiO₂ and Bi₂X₃, achieving effective methylene blue degradation at pH 5. Superoxide radical anions played the dominant role in the degradation mechanism, followed by holes and hydroxyl radicals, as confirmed by scavenger studies. The addition of electron acceptors like H₂O₂ and K₂S₂O₈ significantly enhanced photodegradation. Chemical oxygen demand (COD) measurements confirmed efficient mineralization of MB, and the catalyst exhibited good reusability. Gas Chromatography–Mass Spectrometry (GC–MS) analysis identified key degradation intermediates, supporting the Langmuir-Hinshelwood kinetic model. Additionally, the Bi₂X₃-TiO₂ composite showed notable antibacterial activity, making it a promising material for both wastewater treatment and antimicrobial applications.</div></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":"175 ","pages":"Article 106266"},"PeriodicalIF":5.5,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144587751","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}