Catalysis Letters最新文献_第9页

Photoelectrochemical and Catalytic Hydrogen Generation from Hydrolysis of NaBH4 using Ruthenium and Platinum Decorated ZnO/TiO2 Heterojunction Thin Film Electrodes 钌和铂修饰ZnO/TiO2异质结薄膜电极的NaBH4水解及催化制氢研究

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-18 DOI: 10.1007/s10562-024-04930-5

Cigdem Tuc Altaf, Tuluhan O. Colak, Valentina G. Minkina, Stanislav I. Shabunya, Mehmet Sankir, Nurdan Demirci Sankir, Vladimir I. Kalinin

{"title":"Photoelectrochemical and Catalytic Hydrogen Generation from Hydrolysis of NaBH4 using Ruthenium and Platinum Decorated ZnO/TiO2 Heterojunction Thin Film Electrodes","authors":"Cigdem Tuc Altaf, Tuluhan O. Colak, Valentina G. Minkina, Stanislav I. Shabunya, Mehmet Sankir, Nurdan Demirci Sankir, Vladimir I. Kalinin","doi":"10.1007/s10562-024-04930-5","DOIUrl":"10.1007/s10562-024-04930-5","url":null,"abstract":"<div><p>In this study, the use of ruthenium (Ru) and platinum (Pt)-decorated zinc oxide-titanium oxide (ZnO/TiO<sub>2</sub>) nanostructured catalysts for catalytic and photoelectrochemical (PEC) sodium borohydride (NaBH<sub>4</sub>) hydrolysis for hydrogen production was investigated. Catalytic studies of ZnO/TiO<sub>2</sub>/Ru-Pt electrodes conducted under dark conditions have shown that the hydrolysis process does not depend on the structure of the catalyst. In contrast to the dark catalytic measurements, it was found that the morphology of the nanocatalyst and the metal used to sensitize the nanocatalyst affected the PEC performance. From the BET analysis, ZnO nano-flower (NF) structures have a surface area of 80 m<sup>2</sup>g<sup>−1</sup>, while the surface area of nanosheet (NS) structures is calculated as 17 m<sup>2</sup>g<sup>−1</sup>. In parallel with their high surface area, ZnO NF structures were found to have higher optical absorption in the UV and visible region than NS structures. However, the high photosensitivity of NS structures compared to the NF enabled them to exhibit very good PEC performance, especially at high NaBH<sub>4</sub> concentrations. In this study, the highest applied bias photoconversion efficiency was observed in ZnO NS/TiO<sub>2</sub>/Ru catalysts with 9.0%. This very high efficiency indicates the enormous potential of this catalyst for next-generation green hydrogen production.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995306","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}

引用次数: 0

Reduction of the Hydrogen Content of CO2 Methanation Product Gas via Catalytic Ethanol Dehydration–Hydrogenation 催化乙醇脱水加氢法降低CO2甲烷化产物气体中的氢含量

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-18 DOI: 10.1007/s10562-024-04924-3

Shimpei Norioka, Tomoki Uchiyama, Hirofumi Ohtsuka, Yoshiharu Uchimoto

引用次数: 0

Enhanced Photocatalytic Hydrogen Evolution Properties of Er-Doped ZnIn2S4 Nanostructures via Hydrothermal Synthesis 水热合成增强掺铒ZnIn2S4纳米结构光催化析氢性能

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-18 DOI: 10.1007/s10562-024-04927-0

Muhammad Shoaib, Fen Qiao, Qingan Sun, Jikang Zhao

{"title":"Enhanced Photocatalytic Hydrogen Evolution Properties of Er-Doped ZnIn2S4 Nanostructures via Hydrothermal Synthesis","authors":"Muhammad Shoaib, Fen Qiao, Qingan Sun, Jikang Zhao","doi":"10.1007/s10562-024-04927-0","DOIUrl":"10.1007/s10562-024-04927-0","url":null,"abstract":"<div><p>The utilization of ZnIn<sub>2</sub>S<sub>4</sub> in photocatalytic hydrogen applications has garnered immense interest due to its promising features encompassing non-toxic nature, suitable band gap, and robust stability. However, the performance of ZnIn<sub>2</sub>S<sub>4</sub> remains constrained by its limited absorption range and swift charge recombination. In this context, doping with rare earth metals has emerged as a potential strategy to enhance photocatalytic efficiency, yet this approach remains understudied. Herein, we report the synthesis of Er-doped ZnIn<sub>2</sub>S<sub>4</sub> nanostructures utilizing a hydrothermal method, followed by structural characterization and HER evaluations. The XRD analysis confirms the primarily hexagonal crystal structure of ZnIn<sub>2</sub>S<sub>4</sub>. Notably, an optimal Er concentration of 70% exhibits enhanced hydrogen production efficiency. This improvement is attributed to the efficient charge transfer facilitated by Er doping, as evidenced by the photocurrent and Nyquist plots of ZnIn<sub>2</sub>S<sub>4</sub>. Moreover, the introduction of new energy levels by Er in the band gap enhances the light harvesting capability of ZnIn<sub>2</sub>S<sub>4</sub>. Furthermore, SEM studies reveal that Er doping influences the crystal growth rate of the material.</p><h3>Graphical Abstract</h3><p>The Er doped ZnIn<sub>2</sub>S<sub>4</sub> photocatalyst were prepared through hydrothermal methods. The Er ions doping reduce the band gap of ZnIn<sub>2</sub>S<sub>4</sub> by introducing the new energy levels in the band gap. The reduction of band gap enhances the absorption efficiency and also enhance the number of photogenerated charge carries, which results in enhanced the hydrogen evolution performance.</p>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142995309","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}

引用次数: 0

Enhancement the Photo-Quantum Efficiency in Photocatalytic Reactions via Well-Designed Rutile/Anatase TiO2 Growth on 2D Ti3C2Tx 设计金红石/锐钛矿型TiO2在二维Ti3C2Tx上生长提高光催化反应的光量子效率

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-17 DOI: 10.1007/s10562-025-04934-9

Wei Gan, Yan Guo, Dan Zhu, Min Ling, Can Jiang, Shengfu Zhang

{"title":"Enhancement the Photo-Quantum Efficiency in Photocatalytic Reactions via Well-Designed Rutile/Anatase TiO2 Growth on 2D Ti3C2Tx","authors":"Wei Gan, Yan Guo, Dan Zhu, Min Ling, Can Jiang, Shengfu Zhang","doi":"10.1007/s10562-025-04934-9","DOIUrl":"10.1007/s10562-025-04934-9","url":null,"abstract":"<div><p>With the increasing problems caused by water pollution, the use of photocatalytic oxidation to remove pollutants from wastewater is a sustainable strategy. However, it is challenging to develop well-designed photocatalysts with high photo-quantum efficiency and the comprehension of their photocatalytic reaction mechanisms. Herein, a R/A-TiO<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> (R: rutile; A: anatase) photocatalyst with different ratios of rutile and anatase phases was prepared by a facile hydrothermal method. The results showed that the number of rutile and anatase phases could be readily regulated by adjusting the dosage of titanium isopropoxide (TTIP) and Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>. The prepared R/A-TiO<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>-0.2 contained a mass fraction of 42% rutile phase and 58% anatase phase, with the interface between the two phases exhibited a tightly bonded structure. Meanwhile, the heterojunction between the heterophase TiO<sub>2</sub> and Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> interfaces improved the photo-quantum efficiency of R/A-TiO<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>, and the degradation efficiency of Rhodamine B (RhB) by R/A-TiO<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>-0.2 was 77.82% in 2 h under ultraviolet light illumination. Ultimately, the active species capture experiments verified that the primary active species in the photocatalytic reaction was h<sup>+</sup>, ·OH, and·O<sub>2</sub><sup>−</sup>. This work could shed light on the new approach to the rational design of high-efficiency heterophase TiO<sub>2</sub>-based photocatalysts.</p><h3>Graphical Abstract</h3><p>R/A-TiO<sub>2</sub>/Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> photocatalysts with heterojunctions were controllably synthesized by an EDTA-2Na-assisted hydrothermal method.</p>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994964","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}

引用次数: 0

Efficient Catalytic Dehalogenation of Aryl Halides Under Mild Conditions Using Reusable Reduced Graphene Oxide Loaded Simple Transition Metal–Organic Framework 使用可重复使用的还原氧化石墨烯负载简单过渡金属-有机框架在温和条件下催化芳基卤化物的高效脱卤

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-03 DOI: 10.1007/s10562-024-04911-8

Ilavarasan Lavanya, Muthumuniyandi Nishanthan, Rajendran Lakshmi Priya, Boopathi Shagunthala Hariprasad, Chettipalayam Arunasalam Dhayanithi, Sundaram Ganesh Babu

{"title":"Efficient Catalytic Dehalogenation of Aryl Halides Under Mild Conditions Using Reusable Reduced Graphene Oxide Loaded Simple Transition Metal–Organic Framework","authors":"Ilavarasan Lavanya, Muthumuniyandi Nishanthan, Rajendran Lakshmi Priya, Boopathi Shagunthala Hariprasad, Chettipalayam Arunasalam Dhayanithi, Sundaram Ganesh Babu","doi":"10.1007/s10562-024-04911-8","DOIUrl":"10.1007/s10562-024-04911-8","url":null,"abstract":"<div><p>Transition metal-based Metal–Organic Frameworks (MOFs) (M-BDC (M – Ni, Cu, Zn)) are prepared by solvothermal method. The loading of MOF on the support material, rGO, is done through the simple ultrasonication technique. The MOF materials are characterized using powder X-ray diffraction, Fourier-transform infrared spectroscopy, Scanning electron microscopy, and Thermogravimetric analysis. The catalytic activity of the synthesized MOFs is tested towards the dehalogenation of aryl halides reaction. The reaction conditions are optimized, in which the Ni-BDC MOF shows high catalytic activity. Hence, Ni-BDC MOF is loaded with different weight percentages (10wt%, 20wt%, 30wt%, and 40wt%) of rGO. Subsequently, 10 wt% Ni-BDC MOF/rGO is found to be the best catalyst among the other weight percentages of rGO-loaded catalysts. Moreover, the catalyst is easily recoverable and can be used for many cycles without leaching of active species, structural changes, and loss in activity.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142913014","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}

引用次数: 0

Comparative Study of Catalytic Performance of Post Treated H-BEA Zeolites for n-Hexyl Levulinate Synthesis from Renewable Feedstock 后处理H-BEA沸石催化再生原料合成乙酰丙酸正己酯性能比较研究

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-03 DOI: 10.1007/s10562-024-04903-8

Ayushikumari R. Patel, Aayushi Lodhi, Hemant Parmar, Ajay Dalai, Kalpana Maheria

{"title":"Comparative Study of Catalytic Performance of Post Treated H-BEA Zeolites for n-Hexyl Levulinate Synthesis from Renewable Feedstock","authors":"Ayushikumari R. Patel, Aayushi Lodhi, Hemant Parmar, Ajay Dalai, Kalpana Maheria","doi":"10.1007/s10562-024-04903-8","DOIUrl":"10.1007/s10562-024-04903-8","url":null,"abstract":"<div><p>In the present study, zeolite H-BEA catalyst has been modified by controlled desilication post modification route using first with cationic surfactant, (6-Bromohexyl)trimethylammonium Bromide (6-Br-TMA) designated as MBB catalyst and then the other with 6-Br-TMA and yeast, designated as MBBY catalyst. These newly synthesized catalytic materials have been characterized by several techniques such as, Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction, scanning electron microscopy, solid state NMR (<sup>29</sup>Si, <sup>27</sup>Al, <sup>1</sup>H) N<sub>2</sub> sorption isotherm analysis, thermogravimetric analysis, ammonia temperature program desorption (NH<sub>3</sub>-TPD) analysis, etc. These mesozeolites were found to exhibit enhanced physicochemical (BET surface area, surface acidity, pore volume, mesoporosity, etc.) characteristics as compared to their parent zeolite H-BEA. Catalytic assessement studies of the synthesized zeolites has been demonstrated via conducting experiments involving esterification of levulinic acid (LA) and <i>n</i>-hexanol. Parametric studies has been undertaken in order to get maximum LA conversion by varying several reaction parameters such as molar ratio (acid to <i>n</i>-hexanol), catalyst concentration, reaction time, etc. Further catalysts’ reusability studies has been carried out to assess their potential for reusability. The results indicated better catalytic performance of the zeolite H-BEA which is modified with the use of yeast (MBBY) as compared to microporous zeolite H-BEA and MBB catalyst which may be due to its enhanced surface area and surface acidity.</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 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912953","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}

引用次数: 0

Ultrasound-Assisted Dual-Enzyme System for the Preparation of Fatty Acid Ethyl Esters 超声辅助双酶体系制备脂肪酸乙酯

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-03 DOI: 10.1007/s10562-024-04908-3

Yan Wang, Xiaohong Hao, Xiongzhi Da, Xiangsheng Zheng

{"title":"Ultrasound-Assisted Dual-Enzyme System for the Preparation of Fatty Acid Ethyl Esters","authors":"Yan Wang, Xiaohong Hao, Xiongzhi Da, Xiangsheng Zheng","doi":"10.1007/s10562-024-04908-3","DOIUrl":"10.1007/s10562-024-04908-3","url":null,"abstract":"<div><p>This study focuses on the preparation of fatty acid ethyl esters (FAEE) in a solvent-free system using high-acid-value waste oil as the raw material. The research involves the addition of two enzymes with different substrate specificities, accompanied by ultrasonic assistance. The investigation explores the impact of enzyme addition (3–7 wt%), enzyme ratio (3:1–1:3), alcohol–oil ratio (5:1–25:1 mmol/g), reaction temperature (30–70 °C), reaction time (30–210 min), and ultrasonic power (0–150 W) on the experimental outcomes. Reaction conditions were optimized by analyzing regression models. The predicted optimal process parameters for FAEE conversion are as follows: enzyme addition of 5.46 wt%, enzyme ratio of 1:2.23, alcohol–oil ratio of 13.79:1 mmol/g, reaction temperature of 60 °C, reaction time of 160 min, and ultrasonic power of 120 W. Under these optimized conditions, three validation experiments were carried out to take the average value, and the conversion rate of FAEE was 93.57 ± 1.17%, which was in good agreement with the predicted value. These results showed that the synergistic effect of the two enzymes accelerated the migration of acyl groups, verified the advantages of the dual enzyme as a catalyst, and provided theoretical support for the preparation of biodiesel by the dual enzyme system.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912962","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}

引用次数: 0

Photocatalytic Applications of Cardanol-Derived meso-Metalloporphyrins Based g-C3N4 Nanocomposites 腰果酚类介金属卟啉基g-C3N4纳米复合材料的光催化应用

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-03 DOI: 10.1007/s10562-024-04916-3

Malena Gomes Martins, Fernando Lima de Menezes, Tiago Melo Freire, Rafaelly Nascimento Araújo, Vitória de Paula Santos, Vivian Stephanie Ferreira Rodrigues, Leonardo Mapurunga de Menezes, Claudenilson da Silva Clemente, Giuseppe Mele, Diego Lomonaco, Pierre Basílio Almeida Fechine, Selma Elaine Mazzetto

{"title":"Photocatalytic Applications of Cardanol-Derived meso-Metalloporphyrins Based g-C3N4 Nanocomposites","authors":"Malena Gomes Martins, Fernando Lima de Menezes, Tiago Melo Freire, Rafaelly Nascimento Araújo, Vitória de Paula Santos, Vivian Stephanie Ferreira Rodrigues, Leonardo Mapurunga de Menezes, Claudenilson da Silva Clemente, Giuseppe Mele, Diego Lomonaco, Pierre Basílio Almeida Fechine, Selma Elaine Mazzetto","doi":"10.1007/s10562-024-04916-3","DOIUrl":"10.1007/s10562-024-04916-3","url":null,"abstract":"<div><p>Graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) is a polymer conjugated composed of carbon and nitrogen atoms in a graphite-like structure. Despite its structure, its catalytic potential is limited due to its small surface area, abundance of electron pairs, and low UV absorption. Recent research has focused on synthesizing nanocomposites from g-C<sub>3</sub>N<sub>4</sub> and <i>meso</i>-metalloporphyrins, which exhibit synergistic properties for photocatalysis through π-π interactions. This study aims to synthesize zinc (ZnP) and palladium (PdP) <i>meso</i>-metalloporphyrins from cardanol, a major constituent of cashew nut shell liquid (CNSL), to create g-C<sub>3</sub>N<sub>4</sub> nanocomposites. These systems were characterized using UV-vis, FT-IR, NMR, TGA, and SEM, and applied to reduce 4-nitrophenol (4-NP) in wastewater to the less toxic 4-aminophenol (4-AP). The synthesis of g-C<sub>3</sub>N<sub>4</sub> with PdP and ZnP produced new nanocomposites, g-C<sub>3</sub>N<sub>4</sub>/PdP and g-C<sub>3</sub>N<sub>4</sub>/ZnP, with yields of 43% and 16%, respectively. These materials demonstrated significant success in the photocatalytic reduction of 4-NP, highlighting the potential of renewable catalysts and promoting cleaner chemical processes, thereby reducing environmental impact.</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 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912964","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}

引用次数: 0

Investigation of Catalytic Performance of γ-Bi2MoO6 Material on the Epoxidation of the Cyclohexene γ-Bi2MoO6材料对环己烯环氧化反应的催化性能研究

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-03 DOI: 10.1007/s10562-024-04909-2

Lei Zhang, Zhihao Shu, Ji’E Tang, Xinmiao Wang, Bin Xie, Tiandi Tang

{"title":"Investigation of Catalytic Performance of γ-Bi2MoO6 Material on the Epoxidation of the Cyclohexene","authors":"Lei Zhang, Zhihao Shu, Ji’E Tang, Xinmiao Wang, Bin Xie, Tiandi Tang","doi":"10.1007/s10562-024-04909-2","DOIUrl":"10.1007/s10562-024-04909-2","url":null,"abstract":"<div><p>The development of efficient catalyst for the epoxidation of alkenes is crucial in industrial application. Herein, bismuth molybdate samples with different surface properties (BMO-<i>x</i>, <i>x</i> = A, B, and C) were synthesized <i>via</i> a hydrothermal method and tested in cyclohexene epoxidation. The BMO-A catalyst exhibited superior catalytic activity, achieving a 67.3% cyclohexene conversion with 83.6% epoxide selectivity, outperforming the BMO-B (17.4% conversion, 40.2% selectivity) and BMO-C (27.0% conversion, 59.1% selectivity) catalysts. This enhanced activity is attributed to BMO-A’s higher percentage of surface exchangeable oxygen, high surface Mo/Bi ratio, and optimal surface wettability. The high epoxidation performance of the BMO-A catalyst was attributed to its larger percentage of surface exchangeable oxygen, high surface Mo/Bi ratio, and suitable surface wettability. Specifically, the BMO-A with more exchangeable oxygen facilitated the adsorption of H<sub>2</sub>O<sub>2</sub> molecules, and subsequent reaction with cyclohexene to yield epoxy-cyclohexane. The hydrophilic surface of BMO-A further enhanced H<sub>2</sub>O<sub>2</sub> enrichment at the reaction interface. This work provides a new strategy for preparing highly active catalyst for the epoxidation of alkenes.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912934","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}

引用次数: 0

Electrospun Fiber Membranes of Fe2O3/ZnO with High Photocatalytic Activity for Wastewater Treatment Application under Visible Light Irradiation 具有高光催化活性的Fe2O3/ZnO静电纺丝膜在可见光下处理废水中的应用

IF 2.3 4区化学

Catalysis Letters Pub Date : 2025-01-03 DOI: 10.1007/s10562-024-04905-6

Qing Lin, Rui Zhang, Xiujuan Zhang, Shuang Li, Junhao Dai, Shuiping Li, Zhao Wang, Dong Liang, Hailuo Fu, Xiaojuan Zhang

{"title":"Electrospun Fiber Membranes of Fe2O3/ZnO with High Photocatalytic Activity for Wastewater Treatment Application under Visible Light Irradiation","authors":"Qing Lin, Rui Zhang, Xiujuan Zhang, Shuang Li, Junhao Dai, Shuiping Li, Zhao Wang, Dong Liang, Hailuo Fu, Xiaojuan Zhang","doi":"10.1007/s10562-024-04905-6","DOIUrl":"10.1007/s10562-024-04905-6","url":null,"abstract":"<div><p>Fe<sub>2</sub>O<sub>3</sub>/ZnO fiber membranes, characterized by their high specific surface area and expanded UV–Vis absorption spectrum, were successfully synthesized through a process of electrospinning followed by calcination. The diameters of Fe<sub>2</sub>O<sub>3</sub>/ZnO fibers are approximately 150 nm, and the specific surface areas of Fe<sub>2</sub>O<sub>3</sub>/ZnO fiber membranes are around 29 m<sup>2</sup>/g. XRD, SEM, and XPS results confirm the formation of a heterojunction between ZnO and α-Fe<sub>2</sub>O<sub>3</sub>. Compared with pure ZnO fiber membrane, the UV–Vis absorptions of the Fe<sub>2</sub>O<sub>3</sub>/ZnO fiber membranes are extended, and transient photocurrent intensities are significantly increased from 0.65 mA/cm<sup>2</sup> to 0.86 mA/cm<sup>2</sup>. Free radical capture experiments further reveal the generation of abundant •OH radicals, which play a crucial role in enhancing the photocatalytic performance of these Fe<sub>2</sub>O<sub>3</sub>/ZnO fiber membranes. Optimization studies have determined that the optimal molar ratio of Fe to Zn is 8 mol% in the Fe<sub>2</sub>O<sub>3</sub>/ZnO heterojunction, which corresponds to a 45% improvement in photocatalytic degradation efficiency for MB. Furthermore, the remarkable cycling stability of the Fe<sub>2</sub>O<sub>3</sub>/ZnO fiber membranes demonstrate their substantial potential for photocatalytic dye wastewater treatment.</p></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 2","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912976","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}

引用次数: 0