Catalysis Letters最新文献

{"title":"Hydrothermal Synthesis of Flower-like MoS2/CoP S-scheme Heterojunction for Highly Efficient Photocatalytic Hydrogen Evolution","authors":"Chunhua Niu,&nbsp;Xueting Xuan,&nbsp;Zhenghao Zhao,&nbsp;Xiahui Xiong,&nbsp;Zhiqiang Wang,&nbsp;Shuang Feng,&nbsp;Yangjie Li,&nbsp;Keliang Wu,&nbsp;Jiancheng Luo","doi":"10.1007/s10562-026-05498-y","DOIUrl":"10.1007/s10562-026-05498-y","url":null,"abstract":"<div><p>Hydrogen energy is widely regarded as a highly promising green alternative to conventional fossil fuels. Molybdenum disulfide (MoS₂) has been identified as a low-cost catalyst for photocatalytic hydrogen evolution; however, its practical application remains constrained by inherent drawbacks, including basal-plane inertness, poor electrical conductivity, and severe photogenerated carrier recombination. In this work, a series of flower-like MoS₂/CoP S‑scheme heterojunctions with varying molar ratios were synthesized via a hydrothermal method followed by a high‑temperature phosphorization process. Characterization results reveal that the introduction of CoP effectively refines the microstructural morphology, enhances the specific surface area, and increases the number of active sites. Meanwhile, the built‑in electric field established at the heterojunction interface facilitates efficient charge migration along the S‑scheme pathway, thereby extending the visible‑light response range and suppressing carrier recombination. When the molar ratio of MoS₂ to CoP was 1.0, the resulting composite exhibited the optimal photocatalytic hydrogen‑evolution performance, achieving a hydrogen production rate 3.43 times that of pristine MoS₂, while its catalytic activity remained stable after cyclic tests. This study demonstrates that constructing S‑scheme heterojunctions between transition‑metal sulfides and phosphides constitutes an effective strategy for modifying MoS₂‑based photocatalysts. Furthermore, it provides a viable reference for the development of low‑cost, high‑performance noble‑metal‑free photocatalysts for sacrificial‑agent‑assisted photocatalytic hydrogen production.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis of CaO Nanoparticles via Modified Pechini Sol-Gel Method for Biodiesel Production: Process Optimization, Kinetic Modeling and Mechanistic Insights","authors":"Abdelhalim Balouli,&nbsp;Tarek Berrama,&nbsp;Feriel Sahoui,&nbsp;Lamia Brahmi","doi":"10.1007/s10562-026-05496-0","DOIUrl":"10.1007/s10562-026-05496-0","url":null,"abstract":"<div><p>In this study, calcium oxide nanoparticles (CaO-NPs) were synthesized via the modified Pechini sol-gel method using citric acid as the chelating agent and ethylene glycol as the polycondensation medium, and evaluated for the heterogeneous catalysis of soybean waste cooking oil (SWCO) transesterification. The synthesized catalyst was characterized by X-ray diffraction (XRD), Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR), Brunauer–Emmett–Teller and Barrett–Joyner–Halenda (BET-BJH), scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM-EDX), Hammett indicator analysis, and benzoic acid titration, confirming the formation of mesoporous CaO-NPs with an estimated crystallite size of 47.4 nm and a BET surface area of 16.0 m² g^− 1. Process optimization was performed using response surface methodology (RSM) via a central composite design (CCD), yielding a fatty acid methyl ester (FAME) yield of 97.40% under the optimal conditions of 137.0 min, 64.2 °C, and 2.6 wt% catalyst loading. Kinetic modeling in the range of 50–70 °C using nonlinear regression revealed that the pseudo-first-order model provided the best statistical fit to the experimental data, while generalized-order fitting yielded an average reaction order close to unity. The Arrhenius activation energy was 32.56 kJ mol-¹, whereas the activation thermodynamic parameters (ΔH^‡ = 29.80 kJ mol^− 1, ΔS^‡ = -0.22 kJ mol^− 1 K^− 1, and ΔG^‡ = 101.21-105.63 kJ mol^− 1) indicated the endothermic and non-spontaneous transition state formation. A preliminary mechanistic assessment suggested statistical consistency with an Eley-Rideal-type pathway. Furthermore, the catalyst exhibited good reusability, maintaining a FAME yield above 82% over 5 consecutive cycles. These findings demonstrate the potential of the modified Pechini method for preparing efficient CaO nanocatalysts for sustainable biodiesel production.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Imidazolium Ionic Liquid-Functionalized MIL-101(Cr) for the Cycloaddition of CO2 and Propylene Oxide to Propylene Carbonate","authors":"Ruixin Xia,&nbsp;Jiahe Song,&nbsp;Bao Guo,&nbsp;Daolai Sun,&nbsp;Jianhua Lv","doi":"10.1007/s10562-026-05422-4","DOIUrl":"10.1007/s10562-026-05422-4","url":null,"abstract":"<div><p>An ionic liquid-grafted catalyst, denoted as IL@MIL-101-NH₂, was synthesized by introducing a novel functionalized bis-imidazolium ionic liquid containing carboxyl groups into the MIL-101-NH₂(Cr) using a simple one-step method. The structural features of the catalyst were characterized by FT-IR, XRD, XPS, BET, SEM and so on, and its catalytic performance in the cycloaddition reaction of carbon dioxide (CO₂) with propylene oxide (PO) to propylene carbonate (PC) was investigated. The results demonstrated that IL@MIL-101-NH₂ exhibited excellent catalytic activity. Under the conditions of 110 °C, 2 MPa, 3 h, and a catalyst loading of 3.0 wt%, a PO conversion of 95.1% and a PC selectivity of 98.7% were achieved. The superior catalytic performance of IL@MIL-101-NH₂ was attributed to the synergistic effect among the Cr³⁺ metal active centers, nucleophilic Br⁻ species and hydrogen-bond-donating –COOH groups. In addition, the catalyst maintains good catalytic performance after four consecutive cycles, indicating its favorable stability and promising application potential.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improvement of the Photocatalytic and Photoelectrochemical Properties of ZnO/Cu Thin Films","authors":"I. Juárez-Ramírez,&nbsp;G. Ortiz-Rabell,&nbsp;D. Sánchez-Martínez,&nbsp;J. L. Aragón-Hernández","doi":"10.1007/s10562-026-05494-2","DOIUrl":"10.1007/s10562-026-05494-2","url":null,"abstract":"<div><p>In this work, ZnO films synthesized with traces of Cu by the sol gel method and deposited on ITO (Indium Tin Oxide) substrate showed potential application in photoelectrochemical and photocatalytic systems. The films are characterized by different techniques like X-ray diffraction (XRD), Electronic microscopy (SEM), UV-Vis Spectrophotometry, and Photoluminescence (PL), evidenced the synthesis of the material, as well as improvement in properties such as light absorption, low recombination, and morphology. Photoelectrochemical tests of ZnO/Cu films showed an improvement in charge transfer with respect to ZnO under UV light irradiation due to the increment of donor density. On the other hand, Nyquist curves showed that the addition of Cu decreases the resistance to charge transfer provoking an improvement in the conductivity of the films. Finally, the hydrogen photocatalytic tests showed an increase in the ZnO/Cu films with respect to ZnO.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural Stability and Electronic Modulation of Ru3 and Ru2Fe Single-Cluster Catalysts Anchored on Single-Vacancy Graphene for Enhanced HER; DFT Study","authors":"Gebru Tesfaye Sherka,&nbsp;Habte Dulla Berry,&nbsp;Qinfang Zhang","doi":"10.1007/s10562-026-05490-6","DOIUrl":"10.1007/s10562-026-05490-6","url":null,"abstract":"<div><p>Developing efficient and stable electrocatalysts for the hydrogen evolution reaction (HER) remains a key challenge for sustainable hydrogen production. In particular, achieving an optimal balance between hydrogen adsorption and desorption in single-cluster catalysts(SCC) is still unresolved. Herein, density functional theory (DFT) calculations were performed to investigate Ru₃ and Ru₂Fe clusters anchored on single-vacancy graphene (SVG) as HER catalysts. The results reveal that the binding energy of the Fe-doped Ru cluster is more negative (− 5.88 eV) than that of the pure Ru₃ cluster (− 5.56 eV). The Ru–Ru bond length expands from 2.30 Å in the gas phase to 2.36 Å when supported on SVG for the pure Ru₃ cluster, and from 2.36 Å in the gas phase to 2.45 Å for Fe-doped Ru₂Fe. Meanwhile, the Ru–Fe bond length increases from 2.15 Å in the gas phase to 2.193 Å on SVG. These bond length variations, combined with the highly negative binding energy, induce an upward shift in the Ru d-band center from − 1.58 eV(Ru₃) to − 1.478 eV(Ru₂Fe), promoting stronger hydrogen adsorption. Ru₃ @SVG exhibits near-thermoneutral H adsorption (− 0.165 eV), indicating optimal HER activity, while Ru₂Fe @SVG displays over binding (− 0.341 eV), especially at Ru top sites. A linear correlation exists between the d-band center and H adsorption strength. Mechanistic analysis shows that the highly negative binding energy, bond length variations, and d-band shift enhance cluster stability through synergistic electronic and structural effects, making Fe-doped Ru₂Fe@SVG the most favorable, durable, and promising candidate for experimental synthesis. In contrast, Ru₃ @SVG follows a balanced HER pathway, while Ru₂Fe@SVG is hindered by slow H desorption. These findings place SVG-supported clusters as favorable, durable HER catalysts, highlighting electronic structure tuning for Pt-alternative design.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148751211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pd-Ni/Ru-Al2O3 -SiO2 Coating Supports the Efficient Synthesis of Ethyl 3-Piperidine-Carboxylate on Foam Ceramics","authors":"Guopu Shi,&nbsp;Fangxu Shi,&nbsp;Fuxin Liang,&nbsp;Yulin Wei,&nbsp;Yuanguang Li,&nbsp;Yubing Han,&nbsp;Junyan Wu,&nbsp;Sai Huang,&nbsp;Honglei Wang,&nbsp;Jun Ji,&nbsp;Chao Wu","doi":"10.1007/s10562-026-05485-3","DOIUrl":"10.1007/s10562-026-05485-3","url":null,"abstract":"<div><p>Ethyl 3-piperidine-carboxylate is an important intermediate in the pharmaceutical field. To break through the limitations of poor mechanical strength and thermal stability of catalysts and low catalytic efficiency of foam ceramic carriers due to the lack of active sites in traditional synthesis, this study used the hydrogenation synthesis of ethyl nicotinate to produce this intermediate as the probe reaction. Pd-Ni/Ru-Al₂O₃-SiO₂ foam ceramic catalysts were prepared by the sol-gel method and the impregnation method. Relying on the bimetallic differentiated synergistic effect of Ni, Ru, and Pd, the above technical bottlenecks were overcome. A variety of characterization techniques reveal its core mechanism of action: Pd serves as the catalytic core, and Ni can optimize the electronic structure, enabling the Pd-Ni alloy to obtain the optimal d-band center and adsorption energy, laying an electronic foundation for efficient catalysis. Ru can precisely control the particle size of Pd-Ru alloy, which is 4.5 nm smaller than that of single-metal Pd, significantly improving the metal dispersion and the utilization rate of active sites. The three-dimensional network structure of foam ceramics enhances mass transfer efficiency. The γ-Al₂O₃-SiO₂ coating provides abundant active sites and excellent stability. The catalytic performance of this system has been significantly enhanced. Among them, the yield of the corresponding product of the Pd-Ni bimetallic catalyst reached 92.57%, and it still remained above 80% after five cycles of use, providing new prospects for the green and efficient synthesis of ethyl 3-piperidine-carboxylic acid esters and the development of low-cost hydrogenation catalysts.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on the Use of Green-Synthesized Cerium Oxide Particles for Removing Ciprofloxacin from Aqueous Solutions and Their Antibacterial Effects","authors":"Zhao Ling Meng,&nbsp;Chun Guang Li,&nbsp;Yu Qing Liu,&nbsp;Ming Yi Li,&nbsp;Shi Hao Wang,&nbsp;Baifeng Ma","doi":"10.1007/s10562-026-05492-4","DOIUrl":"10.1007/s10562-026-05492-4","url":null,"abstract":"<div><p>Orange peel extract served as the biomass component during calcination of the cerium precursor to prepare OP-CeO₂-Nps. SEM images distinguished the two materials morphologically: CeO₂-Nps were composed mainly of spherical particles, whereas OP-CeO₂-Nps showed an uneven porous powder form. X-ray diffraction and Raman analysis verified that the cubic fluorite phase remained in the nanoparticles, and the Ce–O vibration was supported by FT-IR and Raman signals. XPS further clarified the chemical states of C(1s), O(1s), and Ce(3d). UV-Vis diffuse reflectance placed the OP-CeO₂-Nps energy positions at -0.50 to 2.64 eV and those of CeO₂-Nps at -0.395 to 2.535 eV. Ciprofloxacin (CIP) served as the antibiotic model compound for photocatalytic evaluation. Under UV irradiation, OP-CeO₂-Nps achieved better degradation than CeO₂-Nps, with efficiency varying with pH, catalyst amount, and initial CIP level. Scavenging experiments identified the main reactive roles of h⁺, ⋅OH, and ⋅O^–₂ during CIP decomposition. Taken together, OP-CeO₂-Nps is a promising photocatalyst for antibiotic-like wastewater, and it also generated obvious inhibition zones against Escherichia coli, Staphylococcus aureus, and Bacillus subtilis.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From Computational Screening to Preparative Scale: A Transaminase Identified by Machine Learning for (R)-1-Boc-3-aminopyrrolidine","authors":"MiMi Duan,&nbsp;Xiafeng Lu,&nbsp;Yan Wu,&nbsp;Peibing Huang,&nbsp;Wen Zheng,&nbsp;Sainan Zhang,&nbsp;Kai Liu,&nbsp;Changlong Jia,&nbsp;Feng Du,&nbsp;Min Cao,&nbsp;Muqing Ma,&nbsp;Zhibo Luo","doi":"10.1007/s10562-026-05489-z","DOIUrl":"10.1007/s10562-026-05489-z","url":null,"abstract":"<div><p>(<i>R</i>)-( +)-1-Boc-3-aminopyrrolidine is an indispensable chiral intermediate for central nervous system drugs and Janus kinase inhibitors, yet its traditional chemical synthesis is plagued by harsh conditions, heavy pollution, and inadequate stereocontrol. Biocatalysis with transaminases (TAs) offers an attractive green alternative, but discovering optimal enzymes remains a major bottleneck. Here, we report a synergistic integration of machine learning (ML) with experimental validation to break this bottleneck. By ML-enabled evaluation of seven phylogenetically diverse TAs, we rapidly identified TA-6 from <i>Arthrobacter</i> sp. as an outstanding (<i>R</i>)-selective biocatalyst for the asymmetric amination of prochiral N-Boc-3-pyrrolidinone. Notably, using a whole-cell catalyst loading of only 10 g/L (DCW), TA-6 converted 100 g/L of ketone substrate on a 20-L preparative scale, delivering the desired (<i>R</i>)-enantiomer in 99.5% enantiomeric excess. This work not only provides a practical, scalable, and sustainable biocatalytic route to a pharmaceutically essential chiral amine, but also demonstrates that machine learning enables a paradigm shift from trial-and-error to data-driven precision in asymmetric synthesis, dramatically accelerating enzyme discovery.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148750767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deactivation Kinetics, Coking, and Decoking Kinetics of Bimetallic Pt–Sn Catalysts During Dehydrogenation: Effect of Feed, Support, and Reducing Agent","authors":"Suresh Avithi Kanniappan,&nbsp;Udaya Bhaskar Reddy Ragula","doi":"10.1007/s10562-026-05482-6","DOIUrl":"10.1007/s10562-026-05482-6","url":null,"abstract":"<div><p>The high-demand olefins are produced from paraffins via dehydrogenation in catalytic packed bed reactors. Sn-promoted Pt catalysts supported on alumina were reported to have excellent selectivity to olefins at a lower active metal loading. However, paraffin conversion was low. Additionally, the catalysts suffer from deactivation due to coking. Mixed-paraffin dehydrogenation was proposed to achieve higher conversion with negligible change in olefin selectivity. Estimation of deactivation kinetics and understanding the type and location of coke deposited are critical for designing efficient catalyst regeneration processes. In this work, six Pt–Sn catalysts (different reducing agents and supports) were synthesized using the wetness impregnation method. Individual- and mixed-paraffin dehydrogenation was performed in a fixed-bed reactor. The kinetic parameters were obtained from activity vs. time data. The amount of coke deposited was obtained from thermogravimetric analysis under a zero-air atmosphere, which was also used to estimate the kinetic parameters for different stages of the coke removal process using Fraser-Suzuki deconvolution of differential thermogravimetric (DTG) data and the Coats-Redfern method. Fourier Transform Infrared (FTIR) and Raman spectroscopies were used to understand the nature of coke deposited. All the catalysts followed second-order deactivation. Two peaks were observed during the deconvolution of DTG data. The random-scission and second-order models were the best fit for the two peaks, respectively. The activation energy for decoking was between 150 and 216 kJ/mol.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 9","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148628479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dual-Functional Mn2O3-Co3O4 Nanocomposite for Visible-Light Photocatalytic Degradation and Electrochemical Detection of Trimethoprim","authors":"Jahnavi Hunasekatte Katamallappa,&nbsp;Jagadish Krishnegowda,&nbsp;Dhanyashree Savitha Vishwakumar,&nbsp;Sucheta Mallikarjunaiah,&nbsp;Rajendra Prasad Shivalingappa","doi":"10.1007/s10562-026-05478-2","DOIUrl":"10.1007/s10562-026-05478-2","url":null,"abstract":"<div><p>The development of multifunctional nanomaterials capable of both pollutant degradation and chemical sensing has attracted considerable attention for environmental monitoring applications. In the present work, a Mn₂O₃–Co₃O₄ nanocomposite was successfully synthesized via a facile and cost-effective sol–gel method and explored for dual applications in photocatalytic degradation and electrochemical detection of the antibiotic trimethoprim (TMP). Structural and morphological analyses confirmed the formation of a porous heterostructured composite with enhanced surface properties. Optical studies revealed a narrow band gap of 2.1 eV, enabling efficient visible-light absorption. The photocatalytic performance of the Mn₂O₃–Co₃O₄ nanocomposite was evaluated under sunlight irradiation, where a maximum degradation efficiency of 95% was achieved within 50 min under optimized conditions (pH 5, temperature 35 °C, and initial TMP concentration of 20 ppm). Kinetic studies indicated that the degradation process follows pseudo-first-order reaction kinetics. In addition to photocatalysis, the synthesized nanocomposite exhibited excellent electrocatalytic activity toward TMP sensing. The electrochemical sensor demonstrated a wide linear detection range of 0.05–25 µM, a limit of detection (LOD) of 0.5 µM, and a high sensitivity of 10 µA µM⁻¹ cm⁻². The improved performance is attributed to the synergistic interaction between Mn₂O₃ and Co₃O₄, which facilitates efficient charge separation and enhances electron transfer. These findings highlight the Mn₂O₃–Co₃O₄ nanocomposite as a promising dual-functional material for environmental remediation and antibiotic monitoring.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 8","pages":""},"PeriodicalIF":2.5,"publicationDate":"2026-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148614448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}