Catalysis Letters最新文献

{"title":"Exploration of Dual-Atom Catalysts for CO2 Reduction Reaction Under Varying Potentials Using First-Principles and Machine Learning Approaches","authors":"Haishan Yu,&nbsp;Lei Cui,&nbsp;DaDi Zhang","doi":"10.1007/s10562-025-05117-2","DOIUrl":"10.1007/s10562-025-05117-2","url":null,"abstract":"<div><p>Carbon dioxide (CO₂) is a major greenhouse gas, contributing to global warming and climate change by raising surface temperatures and causing extreme weather events. This necessitates effective CO₂ removal and conversion into chemical products, aligning with the demands of energy materials science. Recent advancements in catalytic methods, particularly electrocatalysis, have focused on converting CO₂ into valuable fuels and industrial products using various catalysts. Among these, carbon-supported double atom catalysts (DACs) have demonstrated promise due to their close catalytic site proximity, enhancing electron transfer efficiency and stability. This study employs density functional theory (DFT) to explore the geometric configurations, electronic structures, and adsorption properties of 380 carbon-supported DACs for CO₂ reduction reactions (CO₂RR). By analyzing reaction pathways involving HCOOH, CO, CH₄/CH₃OH, and hydrogen evolution reactions (HER) at 722 distinct active sites, we assess the performance and selectivity of these DACs across varying potentials. The integration of machine learning (ML) algorithms into the computational analyses allows for accurate predictions of intermediate adsorption energies and site selectivity, achieving a coefficient of determination (R²) of approximately 0.90 and a mean absolute error (MAE) of around 0.2. Ultimately, this comprehensive DFT-ML approach identifies several promising candidates for CO₂RR and elucidates key descriptors that impact their performance.</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":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165083","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":"Stereoselective Synthesis and Chain Microstructure Control of Trans-1,4-polyisoprene Enabled Via TiCl4/MgCl2 Ziegler-Natta Catalyst","authors":"Jing Zhou,&nbsp;Gongguo Zhang,&nbsp;Chongdian Si,&nbsp;Manman Jin,&nbsp;Aihua He,&nbsp;Qingtao Niu","doi":"10.1007/s10562-025-05101-w","DOIUrl":"10.1007/s10562-025-05101-w","url":null,"abstract":"<div><p>Series of isoprene polymerizations with different polymerization time were performed by TiCl₄/MgCl₂ type Ziegler-Natta catalysts. Polymerization kinetics showed catalytic activity had two-stage polymerization feature and the polymer chain microstructure gradually changed from the <i>trans</i>-1,4 and <i>cis</i>-1,4 mixed structure with low molecular weight (<i>M</i>_w) as well as broad molecular weight distribution (<i>M</i>_w/<i>M</i>_n) at the early stage, to the final high <i>trans</i>-1,4 structure with high <i>M</i>_w and narrow <i>M</i>_w/<i>M</i>_n. The high <i>trans</i>-1,4 units can enhance the tensile strength and hardness of the synthetic polyisoprenes, which are widely used for golf ball cover, medicinal material and shape memory material. Polymers were mainly isolated into Fraction C, D and G by the stepwise isothermal crystallization fractionation method. Fraction C and D had high <i>trans</i>-1,4 content, high <i>trans</i>-1,4-[II] dyad sequence concentration, high <i>trans</i>-<i>trans</i> unit linkage content and high crystallinity, which were generated by high <i>trans</i>-1,4 stereoselective active centers. While G fraction had low <i>trans</i>-1,4 content, low <i>trans</i>-1,4-[II] dyad sequence concentration, low <i>trans</i>-<i>trans</i> unit linkage content and low crystallinity, which were formed by the active center with low <i>trans</i>-1,4 stereoselectivity. The stereoselective transformation of active centers as well as <i>trans</i>-1,4 stereospecific polymerization mechanism of isoprene with TiCl₄/MgCl₂-AlEt₃ catalyst system was discussed.</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":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164907","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":"Plasmonic Silver (Ag) Supported Mesoporous CuO Nanocomposites for Photodegradation of Methylene Blue in Water","authors":"Giday G. Welegergs,&nbsp;H. G. Gebretinsae,&nbsp;M. T. Girmay,&nbsp;Azole Sindelo,&nbsp;Abebe Tedla,&nbsp;Z. Y. Nuru,&nbsp;S. Dube,&nbsp;Malik Maaza,&nbsp;Tebello Nyokong","doi":"10.1007/s10562-025-05100-x","DOIUrl":"10.1007/s10562-025-05100-x","url":null,"abstract":"<div><p>Water decontamination remains a challenge in many developing and developed countries. And thus, efficient and affordable approaches are urgently needed. In this research work, a heterogeneous photocatalyst of Ag@CuO nanocomposites (NCs) has been successfully biogenic synthesized using <i>Cactus pears</i> extracts for the decomposition of methylene blue (MB) under visible light irradiation. The obtained nanocomposites consisted of plasmonic silver (Ag) NPs embedded in a semiconductor matrix of copper oxide (CuO). The scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), and Rutherford backscattering spectrometry (RBS) were employed to characterize the morphology, and microstructures of the samples. The SEM images of Ag@CuO NCs confirm the presence of better dispersibility of Ag nanoparticles (NPs) in the nanorod-like surface of CuO. XRD patterns revealed a well-crystalline nature of monoclinic phase of CuO and face centered cubic (fcc) of Ag metal, and EDX spectra confirms the compositions of the nanocomposites. The FT-IR confirmed the secondary metabolites in <i>Cactus pears</i> for the formation of Ag NPs, and Ag@CuO NCs. The Brunauer-Emmett-Teller (BET) surface area of CuO NPs, and Ag@CuO NCs were achieved from N₂ adsorption/desorption isotherm and revealed a specific area of 8.67 m² g⁻¹ and 15.14 m² g⁻¹, respectively with a mesoporous nature. The heterogeneous biogenic Ag@CuO NCs was evaluated for the photocatalytic degradation of methylene blue (MB) dye upon light irradiation and demonstrated higher degradation kinetics rate (k = 0.0578 min⁻¹) compared to CuO (k = 0.0362 min⁻¹). The superior photocatalysis activity of Ag@CuO NCs is ascribed to the synergistic effects of enhanced light absorption, higher adsorption capacity, improved charge-separation and high surface area.</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":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10562-025-05100-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Complex Waste Stream Utilization for Hydrogen Evolution: Ammonia Borane Hydrolysis Over Red Mud Catalyst Under Mild Conditions","authors":"Mattia Bartoli,&nbsp;Marco Etzi,&nbsp;Stefania Lettieri,&nbsp;Giuseppe Ferraro,&nbsp;Candido Fabrizio Pirri,&nbsp;Angelica Monica Chiodoni,&nbsp;Sergio Bocchini","doi":"10.1007/s10562-025-05112-7","DOIUrl":"10.1007/s10562-025-05112-7","url":null,"abstract":"<div><p>The utilization of red mud is a topic of significant interest due to its great production around the world, being the major by-product of alumina production. Nevertheless, its correct valorization is a matter of great complexity. In this work, we propose a novel use of red mud as a catalyst for the release of hydrogen from hydrolysis of ammonia borane in mild conditions. Ammonia borane is among the best chemical hydrogen carriers with a gravimetric hydrogen capability of up to 19 wt% but is characterized by a complex reactivity under thermal stimuli. Accordingly, ammonia borane hydrolysis has emerged as a solid route for direct and safe hydrogen release. In this work, we achieved complete hydrolysis of ammonia borane both at 30 °C and 40 °C after 660 s and 12 s, respectively, with a red mud loading of 10 wt%. The addition of red mud decreased the activation energy of the hydrolysis reaction over 90% and increased the kinetic constant over two orders of magnitude. Furthermore, red mud preserved the catalytic activity after three cycles with no significant changes.</p></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164659","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":"Phosphorylated Imidazole-Functionalized Chloromethylated Polystyrene-Supported Rhodium Catalyst for Hydroformylation of Dihydrofurans","authors":"Fuxiang Jin,&nbsp;Qiao Liu,&nbsp;Honghong Rao,&nbsp;Wenpeng Wang,&nbsp;Meirong Kang,&nbsp;Daqian Xu,&nbsp;Hailong Liu","doi":"10.1007/s10562-025-05110-9","DOIUrl":"10.1007/s10562-025-05110-9","url":null,"abstract":"<div><p>A phosphorylated imidazole-functionalized chloromethylated polystyrene carrier was synthesized by grafting phosphine–nitrogen ligands onto chloromethylated polystyrene resin, followed by coordination with rhodium metal. This approach provides a foundation for the design diversity of supported ligands. The catalytic activity of the prepared supported catalyst was evaluated in the hydroformylation reaction of 2,5-dihydrofuran (2,5-DHF). In this study, a series of phosphorylated imidazole-functionalized rhodium catalysts were successfully prepared and characterized using FT-IR Spectroscopy, TG, SEM, and XPS. The coordination relationships between the rhodium and the phosphorus and nitrogen species within the catalyst were confirmed. The conversion of 2,5-DHF reached 58.4%, with a selectivity of 97.1% for 3-formyltetrahydrofuran using Rh (CO)₂(acac)@PS-IM-PPh₂. Notably, product selectivity remained high after five cycles of catalyst use. The catalyst system was easily recoverable, and good selectivity was maintained across a range of substrates. The introduction of phosphine into the imidazole group of the organic polymer support creates a nitrogen-phosphine synergistic ligand. Furthermore, by linking a diverse array of substituents, various imidazole-based ionic phosphine ligands can be derived, providing a basis for the design diversity of supported ligands.</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":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164597","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":"Promoting Hydrodeoxygenation of Inedible Biolipids Via Coking and Sintering Resistant Co-Loaded ZrO2–SiO2 Dual-Support Catalyst","authors":"Jiaqi Yan,&nbsp;Haojie Zhang,&nbsp;Jing Guo,&nbsp;Zhiyong Yang,&nbsp;Yongfei Li","doi":"10.1007/s10562-025-05108-3","DOIUrl":"10.1007/s10562-025-05108-3","url":null,"abstract":"<p>Deoxygenation of various fatty acid methyl esters (FAMEs) and inedible biolipids to diesel-range alkanes was investigated over an efficient dual-supported Co-based catalyst (Co/Zr_<i>n</i>–SiO₂). The combination of SiO₂ and ZrO₂ dual-support improves the catalytic performance and reduces the apparent activation energy of the Co-based catalyst, with three advantages: (i) both the high surface area of SiO₂ and the encapsulating effect of ZrO₂ favor the formation of smaller Co nanoparticles and fine dispersion, which in turn reduces coke deposition; (ii) incorporating oxyphilic Zr increases the content of Co⁰ while also improving the electron density of Co and the ratio of oxygen deficient (O_D), which is favorable for the dissociation of H₂ and adsorption of C=O/C–O bonds; (iii) hydroxyl-rich SiO₂ and abundant ZrO_<i>x</i>−O_D−Co interfaces synergistically promote the hydrodeoxygenation (HDO) and suppress the decarbonylation (–CO)/decarboxylation (–COO) pathways, effectively preventing carbon loss. The Co/Zr_0.25–SiO₂ with 10 wt% Co and 0.25 Zr/Si molar ratio is used for the deoxygenation of methyl palmitate, yielding 97.6% selectivity towards diesel-range alkanes, with 85.1% hexadecane at full MP conversion. Complex inedible biolipids such as jatropha oil and waste cooking oil can be easily transformed into diesel-range alkanes with a selectivity of 93.9% and 91.6%, respectively. Furthermore, the catalyst shows stable recyclability in the current catalytic deoxygenation system.</p>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164598","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":"Synergic Effects Between Doped Transitional Metals and CeO2Catalysts with 3D Multi-tubular Interconnected Structure Towards Efficient Soot Oxidation","authors":"Gang Yu,&nbsp;Xiao Cheng,&nbsp;Jiateng Hu,&nbsp;Qianqian Yang,&nbsp;Hongya Wu,&nbsp;Zhigang Yang,&nbsp;Shengjian Qin,&nbsp;Guanglei Zhang","doi":"10.1007/s10562-025-05103-8","DOIUrl":"10.1007/s10562-025-05103-8","url":null,"abstract":"<div><p>The effective catalyst-soot contact remains a formidable challenge that hinders the full exploitation of their intrinsic activities towards soot oxidation, while the role of catalysts with varying morphologies on the transfer path of active species rembioains a subject of debate. Thus, we fabricated a series of transition metal-doped CeO₂ catalysts with a three-dimensional (3D) multi-tubular interconnected structure using loofah sponge as a bio-template for soot oxidation in the present work. All the catalysts exhibit superior catalytic activity and stability, among which Ce-Mn catalyst possesses the highest specific surface area (68.90 m²/g) and the largest number of oxygen-active species due to the synergistic redox effects between CeO_x and MnO_x, demonstrates the lowest <i>T</i>₅₀ value of 358 °C under tight contact mode. A comparative study was conducted on the catalytic activity of CeO₂ catalysts doped with different transition metal ions under loose contact and close contact conditions. It was observed that the Ce-Cu catalyst exhibited the smallest differential value (Δ<i>T</i>₅₀ = 26 °C) and a remarkably high relative contact degree (DRC = 0.93).It is evident that the Ce-Cu samples exhibit the highest transfer efficiency of oxygen-active species, owing to their 3D multi-tubular interconnected framework, which significantly enhances the contact degree between the catalyst and soot particles. This research offers a comprehensive understanding of the evolution process of active oxygen species, providing guidance for the precise design of efficient CeO₂ catalysts with specific morphology tailored for soot combustion.</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":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164044","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":"Development of a p-n Ni-ZIF/TiO2 Heterojunction for Photoelectrocatalytic Hydrogen Generation from Seawater","authors":"Daxiang Jin,&nbsp;Wanggang Zhang,&nbsp;Jian Wang,&nbsp;Xiaohong Li,&nbsp;Yiming Liu","doi":"10.1007/s10562-025-05070-0","DOIUrl":"10.1007/s10562-025-05070-0","url":null,"abstract":"<div><p>Photoelectrochemical (PEC) seawater splitting faces challenges including limited light absorption, rapid charge recombination, and chloride corrosion. This study addresses these issues by constructing a p-n heterojunction composite photoanode (Ni-ZIF/TNTAs) through solvothermal integration of nickel-based zeolitic imidazolate framework (Ni-ZIF) onto anodized TiO₂ nanotube arrays (TNTAs). The synergy between Ni-ZIF (bandgap: 2.23 eV) and TNTAs narrows the composite bandgap to 2.72 eV, extending light absorption to 450 nm. The optimized Ni-ZIF/TNTAs (NT-0.01) achieves a photocurrent density of 2.2 mA/cm² at 1.23 V vs. RHE in simulated seawater (3.5 wt% NaCl), fivefold higher than pristine TNTAs (0.44 mA/cm²), alongside a hydrogen evolution rate of 117.5 µmol/cm². Mott-Schottky and UV-vis analyses confirm a built-in electric field at the p-n junction interface, facilitating charge separation and doubling the incident photon-to-current efficiency (IPCE) to 30% at 365 nm. Remarkably, the composite retains 96% hydrogen yield over four cycles, attributed to dynamically formed surface NiOOH layers that suppress chloride penetration while maintaining 87% oxygen evolution reaction (OER) selectivity. This work pioneers the application of Ni-ZIF/TiO₂ heterojunctions in seawater splitting, offering a scalable strategy to reduce freshwater dependency in solar-driven hydrogen production. The design merges visible-light harvesting, corrosion resistance, and efficient charge transport, advancing sustainable energy solutions.</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":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164045","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":"FeVO4/g-C3N4 Heterojunction: Characterization and Photocatalytic Approach Towards the Synthesis of N-(Pyridin-2-yl)cinnamamide Analogues","authors":"Mohamed Sulthan Hasan Fathima Afridha,&nbsp;Selvaraj Mohana Roopan","doi":"10.1007/s10562-025-05104-7","DOIUrl":"10.1007/s10562-025-05104-7","url":null,"abstract":"<div><p>Nano photocatalysts based on semiconductors have received significant attention because of their tendency to catalyse organic processes. To enhance the photocatalytic activity of the highly effective metal vanadate FeVO₄, FeVO₄ and graphitic C₃N₄ nanocomposites were created. A range of complementary techniques, such as powder X-ray diffraction (XRD), N₂ adsorption–desorption, scanning/transmission electron microscopy, energy dispersive X-ray analysis (EDAX), Fourier transform infrared spectroscopy (FTIR), diffuse reflectance ultraviolet-visible spectroscopy (UV-DRS), X-ray photoelectron spectroscopy (XPS), and photoluminescence, were employed for characterisation. Morphological studies revealed that the FeVO₄ nanoparticles were randomly distributed on the surface of C₃N₄. Optical studies revealed the photocatalytic performance of the nanocomposites in the visible-light region. The nanocomposite was applied to the synthesis of <i>N</i>-(pyridin-2-yl)cinnamamide analogues under blue LED illumination. The reaction reached a maximum yield of 92% after 4 h. The photocatalytic mechanism was evaluated, and reusability studies were conducted, which established the stability of the composite for up to five consecutive runs.</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":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162901","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":"A Multifunctional Pectinase from the Manglicolous Endophytic Fungus, Aspergillus sydowii EF 375: Process Optimization, Characterization and Application Potentials","authors":"M R Revathy,&nbsp;Anjali S. Mohan,&nbsp;Dhanya Kesavan,&nbsp;Hafsa Kattatheyil,&nbsp;S Neelima,&nbsp;M V Anju,&nbsp;Rosamma Philip","doi":"10.1007/s10562-025-05105-6","DOIUrl":"10.1007/s10562-025-05105-6","url":null,"abstract":"<div><p>Microbial pectinases, classified within the hydrolase family, play a crucial role in various industrial applications, including food and beverage processing, textile manufacturing, and wastewater treatment. This study investigates the production, purification, biochemical characterization, and potential applications of pectinase derived from the endophytic fungal strain <i>Aspergillus sydowii</i> EF 375, isolated from the mangrove plant <i>Ceriops tagal</i>. Pectinase production was optimized using Response Surface Methodology (RSM), resulting in a 2.2-fold enhancement in enzyme production. The enzyme was subsequently purified, achieving a recovery yield of 3.2% and a specific activity of 73.05 U/mg. Zymogram analysis confirmed the purified pectinase to have a molecular weight of approximately 43 kDa. Kinetic studies revealed a maximum reaction velocity (Vmax) of 161.29 µmol/min and a Michaelis constant (Km) of 0.177 mg/ml, indicating high substrate affinity. The enzyme exhibited optimal catalytic efficiency at 50 °C and pH 5. The activity of the enzyme was notably enhanced by the presence of K⁺, Cu²⁺, Fe²⁺, Mg²⁺, Mn²⁺, Pb²⁺, and Zn²⁺ ions (at concentrations up to 10 mM), while Li⁺, Hg²⁺, and Ni²⁺ acted as inhibitors. Functional applications demonstrated that the purified pectinase significantly improved the clarity of fruit juices, including apple, grape, pineapple, and orange. Furthermore, the enzyme exhibited potential in inhibiting bacterial biofilm formation, highlighting its applicability in antimicrobial and biotechnological interventions.</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":"155 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162908","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}