Catalysts最新文献_第9页

Photocatalytic Applications of SnO2 and Ag2O-Decorated SnO2 Coatings on Cement Paste 水泥浆上的二氧化锡和 Ag2O-Decorated SnO2 涂层的光催化应用

IF 3.9 3区化学

Catalysts Pub Date : 2023-11-28 DOI: 10.3390/catal13121479

Danilo da Silva Vendramini, V. G. Benatto, Alireza Mohebi Ashtiani, F. L. La Porta

{"title":"Photocatalytic Applications of SnO2 and Ag2O-Decorated SnO2 Coatings on Cement Paste","authors":"Danilo da Silva Vendramini, V. G. Benatto, Alireza Mohebi Ashtiani, F. L. La Porta","doi":"10.3390/catal13121479","DOIUrl":"https://doi.org/10.3390/catal13121479","url":null,"abstract":"Recently, the production of new photocatalytic materials has attracted considerable attention as a promising strategy to mitigate anthropogenic environmental degradation. In this study, cement paste composites (water/cement ratio = 0.5) were prepared using a coating based on nanoparticles of SnO2 (SnO2/cement paste) and SnO2 decorated with Ag2O (Ag2O-decorated SnO2/cement paste) for photocatalytic applications. These coatings were prepared in this study by using the hydrothermal method as the strategy. Thus, photocatalyst efficiency was evaluated through the degradation of methylene blue (MB) and methyl red (MR) as cationic and anionic dyes, respectively, and the simultaneous degradation of MB/MR (1:1 v/v) dyes. Moreover, the photocatalytic mechanism was investigated in the presence of scavengers. Notably, an increase in pH in the range of 2–6 resulted in selective degradation of the MB/MR dye mixtures. Overall, the photocatalytic performance of these materials provides a novel platform technology focused on advanced civil engineering applications, which consequently facilitates the mitigation of various environmental problems.","PeriodicalId":9794,"journal":{"name":"Catalysts","volume":"13 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139216415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

CO2 Hydrogenation over Fe-Co Bimetallic Catalyst Derived from the Thermolysis of [Co(NH3)6][Fe(CN)6] 由[Co(NH3)6][Fe(CN)6]热解衍生的 Fe-Co 双金属催化剂的二氧化碳加氢反应

IF 3.9 3区化学

Catalysts Pub Date : 2023-11-28 DOI: 10.3390/catal13121475

A. Gosteva, Mayya V. Kulikova, M. I. Ivantsov, A. A. Grabchak, Yulya P. Semushina, S. Lapuk, A. Gerasimov, N. Tsvetov

{"title":"CO2 Hydrogenation over Fe-Co Bimetallic Catalyst Derived from the Thermolysis of [Co(NH3)6][Fe(CN)6]","authors":"A. Gosteva, Mayya V. Kulikova, M. I. Ivantsov, A. A. Grabchak, Yulya P. Semushina, S. Lapuk, A. Gerasimov, N. Tsvetov","doi":"10.3390/catal13121475","DOIUrl":"https://doi.org/10.3390/catal13121475","url":null,"abstract":"Reducing the amount of CO2 in the atmosphere is a very important task. Therefore, the development and search for new approaches to the synthesis of catalytic systems, allowing for the catalytic conversion of CO2 into valuable products, is an urgent task. In this work, the catalyst was obtained by the thermolysis of a double complex compound. In this regard, kinetic studies of the parameters of the thermolysis process of double complex salts-[Co(NH)3]6][Fe(CN)6] were additionally determined using isoconversion and model approaches of non-isothermal kinetics. The catalyst was studied using various physicochemical methods—X-ray diffraction (XRD), infrared (IR)-spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). It was shown that, at the stage of catalyst preparation, the formation of a CoFe alloy occurred, while the surface mainly consisted of carbon in sp2-hybridization, and the metals existed in the form of spinel CoFe2O4. It was shown that catalysts based on bimetallic salts were active in the process of hydrogenation of carbon dioxide without a pre-activation stage (CO2 conversion reached 28%, with a specific activity of 4.0 µmolCO2/gMe·s). It was established that it was possible to change the selectivity of the carbon dioxide hydrogenation process by pre-treating the catalyst with hydrogen (selectivity for methane formation in the presence of an unreduced catalyst is 46.4–68.0%, whereas in the presence of a reduced catalyst it is 5.1–16.5%).","PeriodicalId":9794,"journal":{"name":"Catalysts","volume":"56 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139216528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Heat-Transfer Analysis of the Promotion of the CO2 Reduction Performance of a P4O10/TiO2 Photocatalyst Using a Black Body Material 利用黑体材料促进 P4O10/TiO2 光催化剂的二氧化碳还原性能的传热分析

IF 3.9 3区化学

Catalysts Pub Date : 2023-11-28 DOI: 10.3390/catal13121477

Akira Nishimura, Ryo Hanyu, Homare Mae, Hiroki Senoue, E. Hu

{"title":"Heat-Transfer Analysis of the Promotion of the CO2 Reduction Performance of a P4O10/TiO2 Photocatalyst Using a Black Body Material","authors":"Akira Nishimura, Ryo Hanyu, Homare Mae, Hiroki Senoue, E. Hu","doi":"10.3390/catal13121477","DOIUrl":"https://doi.org/10.3390/catal13121477","url":null,"abstract":"Since photocatalytic reactions are surface reactions, enhancing gas movement around the photocatalyst could improve photocatalytic CO2 reduction performance. A new approach using black body material to enhance the gas movement around the photocatalyst based on the natural thermosiphon movement of gases around a photocatalyst has been proposed and confirmed experimentally, but the heat-transfer mechanism of the phenomena has not yet been clarified. The aim of this study is to clarify the corresponding heat-transfer mechanism. This study calculated the temperature of the CO2/NH3 gas mixture around a P4O10/TiO2 photocatalyst using the heat-transfer formula. No difference was found between the temperature increase (Tg) from the temperature at the beginning of the CO2 reduction experiment (Tini) and the temperature of the CO2/NH3 gas mixture measured experimentally via thermocouple (Te) under the following illumination conditions: a Xe lamp with visible light (VIS) + infrared light (IR) and IR only. The heat-transfer model proposed in this study predicts Tg well under illumination from a Xe lamp with VIS + IR as well as under IR illumination only. On the other hand, the difference found between Tg and Te was as large as 10 °C under illumination from a Xe lamp with ultraviolet light (UV) + VIS + IR.","PeriodicalId":9794,"journal":{"name":"Catalysts","volume":"1 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139222136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Carbon-Coated Ni-Fe Nanocatalysts: Bridging the Gap in Cinnamaldehyde Hydrogenation Performance and Durability 碳包覆镍铁纳米催化剂：缩小肉桂醛氢化性能和耐久性方面的差距

IF 3.9 3区化学

Catalysts Pub Date : 2023-11-28 DOI: 10.3390/catal13121474

Yuhang Cai, Anping Yin, Jianxiang Zhang, Jiatai Wang, Xiaofei Qin, Yibo Yang, Gaolei Qin, Xiaodong Sun, Peng He, Yong Yang

{"title":"Carbon-Coated Ni-Fe Nanocatalysts: Bridging the Gap in Cinnamaldehyde Hydrogenation Performance and Durability","authors":"Yuhang Cai, Anping Yin, Jianxiang Zhang, Jiatai Wang, Xiaofei Qin, Yibo Yang, Gaolei Qin, Xiaodong Sun, Peng He, Yong Yang","doi":"10.3390/catal13121474","DOIUrl":"https://doi.org/10.3390/catal13121474","url":null,"abstract":"This study focuses on the synthesis and evaluation of carbon−coated Ni−Fe alloy catalysts (NiFex@C, x = 0, 0.3, 0.7, 1.1) for the hydrogenation of cinnamaldehyde. The catalysts were characterized using Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), Raman spectroscopy, and X-ray Photoelectron Spectroscopy (XPS). The introduction of Fe was found to increase the average particle size of the bimetallic catalysts compared to the monometallic Ni@C. Ni existed in both metallic and oxide states, while Fe exhibited multiple oxidation states in the bimetallic catalysts. The carbon layer, approximately 2–3 nm thick, was confirmed to envelop the alloy particles. The catalytic performance of carbon−coated Ni−Fe alloy catalysts indicated that the addition of Fe to Ni@C enhanced the selectivity towards hydrocinnamaldehyde (HCAL), with NiFe0.7@C showing the highest selectivity (~88.6%) but at a reduced conversion rate. The carbon layer played a pivotal role in the stability and reusability of the catalysts. NiFe0.7@C maintained consistent performance over multiple reaction cycles, while NiFe0.7 NPs (without a carbon layer) exhibited significant deactivation. Both catalysts displayed strong magnetism, facilitating easy separation from the reaction mixture. This study sheds light on the significance of the carbon layer in bimetallic catalysts and provides valuable insights for designing efficient catalysts for hydrogenation processes.","PeriodicalId":9794,"journal":{"name":"Catalysts","volume":"20 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139220420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Catalysis in Biomass Valorization—Preface to the Special Issue 生物质增值中的催化作用--特刊序言

IF 3.9 3区化学

Catalysts Pub Date : 2023-11-28 DOI: 10.3390/catal13121478

I. Simakova, D. Murzin

引用次数: 0

Efficient Synthesis of Nickel-Molybdenum/USY-Zeolite Catalyst for Eliminating Impurities (N, S, and Cl) in the Waste Plastic Pyrolysis Oil: Dispersion Effect of Active Sites by Surfactant-Assisted Melt-Infiltration 用于消除废塑料热解油中杂质（N、S 和 Cl）的镍钼/USY-沸石催化剂的高效合成：表面活性剂辅助熔融渗透对活性位点的分散作用

IF 3.9 3区化学

Catalysts Pub Date : 2023-11-28 DOI: 10.3390/catal13121476

Eui Hyun Cho, Ki-Duk Kim, Byung Sun Yoon, Eunkyung Cho, Yeon Jeong Yu, T. Phan, Sang-Goo Jeon, Chang Hyun Ko

{"title":"Efficient Synthesis of Nickel-Molybdenum/USY-Zeolite Catalyst for Eliminating Impurities (N, S, and Cl) in the Waste Plastic Pyrolysis Oil: Dispersion Effect of Active Sites by Surfactant-Assisted Melt-Infiltration","authors":"Eui Hyun Cho, Ki-Duk Kim, Byung Sun Yoon, Eunkyung Cho, Yeon Jeong Yu, T. Phan, Sang-Goo Jeon, Chang Hyun Ko","doi":"10.3390/catal13121476","DOIUrl":"https://doi.org/10.3390/catal13121476","url":null,"abstract":"The upgrading of waste plastic pyrolysis oil (WPPO) through hydrotreating (HDT) is crucial for transforming plastic waste into chemical feedstock. The catalytic role of HDT is of paramount importance for this conversion procedure. In this study, bimetallic catalysts based on Ni and Mo were prepared using the surfactant-assisted melt-infiltration (SAMI) method, completely omitting the use of liquid solutions. Thorough analysis via X-ray diffraction, transmission electron microscopy, and hydrogen temperature-programmed reduction confirmed that the addition of Span60 surfactant effectively prevented the aggregation of Ni and Mo components, reduced the size of metal particles, and improved the dispersion of active sites on the zeolite supports. Consequently, NiMo-based catalysts incorporating Span60, synthesized using the SAMI method, exhibited a superior catalytic performance in the removal of nitrogen, sulfur, and chloride impurities from WPPO during HDT compared to those without surfactant. Specifically, the catalyst prepared with Span60 exhibited 15% higher nitrogen conversion compared to the catalyst prepared without Span60.","PeriodicalId":9794,"journal":{"name":"Catalysts","volume":"151 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139226177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

In Situ Preparation of 0D/2D Zn-Ag-In-S Quantum Dots/RGO Heterojunctions for Efficient Photocatalytic Hydrogen Production 原位制备用于高效光催化制氢的 0D/2D Zn-Ag-In-S 量子点/RGO 异质结

IF 3.9 3区化学

Catalysts Pub Date : 2023-11-27 DOI: 10.3390/catal13121471

Bangya Deng, Yalin Yang, Afaq Ullah Khan, Qitao Chen, Xianjin Wang, Tong Ren, Jiaji Li, Yanhong Liu, Lixia Li, Baodong Mao

{"title":"In Situ Preparation of 0D/2D Zn-Ag-In-S Quantum Dots/RGO Heterojunctions for Efficient Photocatalytic Hydrogen Production","authors":"Bangya Deng, Yalin Yang, Afaq Ullah Khan, Qitao Chen, Xianjin Wang, Tong Ren, Jiaji Li, Yanhong Liu, Lixia Li, Baodong Mao","doi":"10.3390/catal13121471","DOIUrl":"https://doi.org/10.3390/catal13121471","url":null,"abstract":"The creation of junctions between 0D and 2D materials can be an efficient strategy to enhance charge separation for solar hydrogen production. In this study, a simple in situ growth method has been used to synthesize a series of 0D/2D Zn-Ag-In-S quantum dots/reduced graphene oxide (ZAIS QDs/RGO) heterojunctions. The developed heterojunctions were characterized for structural characteristics, morphology, and photocatalytic performance, while varying the content of RGO. We observed that photocatalytic hydrogen production reached a maximum at an RGO content of 30 μL (342.34 µmol g−1 h−1), surpassing that of pure ZAIS QDs (110.38 µmol g−1 h−1) by 3.1 times, while maintaining excellent stability. To understand this enhancement, we performed time-resolved fluorescence and electrochemical impedance spectroscopy. The fluorescence lifetime of RGO loaded at 30 μL (417.76 ns) was significantly higher than that of pure ZAIS QDs (294.10 ns) and had the fastest charge transfer, which can be attributed to the charge transfer and storage capacity of RGO to extend the lifetime of photogenerated carriers and improve the charge separation efficiency. This study offers a simple synthesis method for constructing 0D/2D QDs/RGO heterojunction structures and provides a valuable reference for further enhancing the activity and stability of I-III-VI sulfide QDs.","PeriodicalId":9794,"journal":{"name":"Catalysts","volume":"8 1","pages":""},"PeriodicalIF":3.9,"publicationDate":"2023-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139233107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Tuning the Magnetic and Catalytic Properties of Manganese Ferrite through Zn2+ Doping: Gas Phase Oxidation of Octanol 通过掺杂 Zn2+ 调节锰铁氧体的磁性和催化特性：辛醇的气相氧化

IF 3.9 3区化学

Catalysts Pub Date : 2023-11-27 DOI: 10.3390/catal13121473

Mehnaz Bibi, Muhammad Sadiq, M. Rizk, R. Alsaiari, Z. Iqbal, Zahid Ali

引用次数: 0

A CoFe Bimetallic Catalyst for the Direct Conversion of Syngas to Olefins 将合成气直接转化为烯烃的 CoFe 双金属催化剂

IF 3.9 3区化学

Catalysts Pub Date : 2023-11-27 DOI: 10.3390/catal13121472

Xinxing Wang, Tiejun Lin, D. Lv, Yunlei An, Xingzhen Qi, K. Gong, Liangshu Zhong

引用次数: 0

Can Machine Learning Predict the Reaction Paths in Catalytic CO2 Reduction on Small Cu/Ni Clusters? 机器学习能否预测小型铜/镍簇催化二氧化碳还原反应的路径？