Catalysts最新文献_第9页

Mechanism of Selective Qβ Bacteriophage Inactivation under the Presence of E. Coli Using Ground Rh-Doped SrTiO3 Photocatalyst 使用地面掺杂 Rh 的 SrTiO3 光催化剂在大肠杆菌存在的情况下选择性灭活 Qβ 噬菌体的机制

IF 3.9 3区化学

Catalysts Pub Date : 2024-01-24 DOI: 10.3390/catal14020094

Sho Usuki, S. Machida, Ken‐ichi Katsumata, Makoto Ogawa, S. S. Latthe, Shanhu Liu, Kenji Yamatoya, Kazuya Nakata

{"title":"Mechanism of Selective Qβ Bacteriophage Inactivation under the Presence of E. Coli Using Ground Rh-Doped SrTiO3 Photocatalyst","authors":"Sho Usuki, S. Machida, Ken‐ichi Katsumata, Makoto Ogawa, S. S. Latthe, Shanhu Liu, Kenji Yamatoya, Kazuya Nakata","doi":"10.3390/catal14020094","DOIUrl":"https://doi.org/10.3390/catal14020094","url":null,"abstract":"Photocatalysts have recently attracted attention for removing infectious-disease-causing bacteria and viruses. Among such photocatalysts, ground Rh-doped SrTiO3 (“g-STO:Rh”) has been found to have biospecificity that reduces the Qβ phage infectivity under conditions that did not decrease the E. coli survival rate. Elucidating the mechanism of selective antiphage activation is important for developing photocatalysts that act effectively against specific microorganisms. In this study, SDS-PAGE and quantitative PCR showed that a g-STO:Rh-treated Qβ phage preferentially inactivated the A2 protein involved in attachment to host cells. The analysis of the photocatalyst-treated ovalbumin using g-STO:Rh indicated that the protein’s isoelectric point significantly influenced the initial interaction with g-STO:Rh. However, once the protein is absorbed, it was decomposed without the release of intermediates. Furthermore, an inactivation assay for four different phages by photocatalyst treatment using g-STO:Rh revealed that phages with positively charged proteins are highly susceptible to inactivation, and the accessibility of critical components to g-STO:Rh influences susceptibility. We conclude that the selective antiphage activation of g-STO:Rh depends on the adsorption efficiency of the protein and g-STO:Rh.","PeriodicalId":9794,"journal":{"name":"Catalysts","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139599864","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

Scalability and Investigation of the Geometrical Features and Shapes of a Tandem Photo-Electrolysis Cell Based on Non-Critical Raw Materials 基于非关键原材料的串联光电解电池几何特征和形状的可扩展性与研究

IF 3.9 3区化学

Catalysts Pub Date : 2024-01-24 DOI: 10.3390/catal14020098

C. Lo Vecchio, Giosuè Giacoppo, Orazio Barbera, Alessandra Carbone, V. Baglio, A. Aricò, G. Monforte, S. Trocino

{"title":"Scalability and Investigation of the Geometrical Features and Shapes of a Tandem Photo-Electrolysis Cell Based on Non-Critical Raw Materials","authors":"C. Lo Vecchio, Giosuè Giacoppo, Orazio Barbera, Alessandra Carbone, V. Baglio, A. Aricò, G. Monforte, S. Trocino","doi":"10.3390/catal14020098","DOIUrl":"https://doi.org/10.3390/catal14020098","url":null,"abstract":"Tandem photoelectrochemical cells (PECs) are devices useful for water splitting (WS) with the production of oxygen at the photoanode (PE) and hydrogen at the photocathode (PC) by adsorbing more than 75% of the solar irradiation; a portion of the UV/Vis direct solar irradiation is captured by the PA and a diffused or transmitted IR/Vis portion by the PC. Herein, Ti-doped hematite (PA) and CuO (PC) were employed as abundant and non-critical raw semiconductors characterised by proper band gap and band edge banding for the photoelectrochemical WS and absorption of sunlight. The investigation of inexpensive PEC was focused on the scalability of an active area from 0.25 cm2 to 40 cm2 with a rectangular or square shape. For the first time, this study introduces the novel concept of a glass electrode membrane assembly (GEMA), which was developed with an ionomeric glue to improve the interfacial contact between the membrane and photoelectrodes. On a large scale, the electron–hole recombination and the non-optimal photoelectrodes/electrolyte interface were optimized by inserting a glass support at the photocathode and drilled fluorine tin oxide (FTO) at the photoanode to ensure the flow of reagents and products. Rectangular 40 cm2 PEC showed a larger maximum enthalpy efficiency of 0.6% compared to the square PEC, which had a value of 0.37% at a low bias-assisted voltage (−0.6 V). Furthermore, throughput efficiency reached a maximum value of 1.2% and 0.8%, demonstrating either an important effect of the PEC geometries or a non-significant variation of the photocurrent within the scalability.","PeriodicalId":9794,"journal":{"name":"Catalysts","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139599327","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

Co3O4-rGO—Synthesis, Characterization, and Evaluation of Photocatalytic Activities Co3O4-rGO 的合成、表征和光催化活性评估

IF 3.9 3区化学

Catalysts Pub Date : 2024-01-24 DOI: 10.3390/catal14020096

Muhammad Saeed, Firas H. Albadran, A. F. Zahoor, Asif Nisar, Aamal A. Al-Mutairi, S. Al-Hussain, Ali Irfan, Magdi E. A. Zaki

{"title":"Co3O4-rGO—Synthesis, Characterization, and Evaluation of Photocatalytic Activities","authors":"Muhammad Saeed, Firas H. Albadran, A. F. Zahoor, Asif Nisar, Aamal A. Al-Mutairi, S. Al-Hussain, Ali Irfan, Magdi E. A. Zaki","doi":"10.3390/catal14020096","DOIUrl":"https://doi.org/10.3390/catal14020096","url":null,"abstract":"Water contamination with synthetic dyes is an escalating problem worldwide. Herein, Co3O4-decorated reduced graphene oxide (Co3O4-rGO) is reported as an effective heterogeneous photocatalyst for the decomposition of organic dyes. The synthesis of Co3O4-rGO was confirmed via spectroscopic techniques including XRD, XPS, TEM, and FTIR. After characterization, the prepared Co3O4-rGO composite was tested as a photocatalyst for the degradation of methylene blue and methyl orange. The photocatalytic efficiency of Co3O4-rGO was >95% after 60 min, corresponding to 200 mg/L as the initial concentration of each dye. The photodegradation of MB and MO was confirmed by BOD and COD measurements. Experimental parameters like the re-usability of Co3O4-rGO, the effect of catalyst dosage, and the effect of dye concentration on photocatalytic activity were also investigated. The photocatalytic activity of Co3O4-rGO for the degradation of MB was 2.13 and 3.43 times higher than that of Co3O4 and rGO, respectively. Similarly, the photocatalytic activity of Co3O4-rGO for the degradation of MO was 2.36 and 3.56 times higher than that of Co3O4 and rGO, respectively. Hence, Co3O4-rGO was found to be an efficient and reusable photocatalyst for the decomposition of selected dyes in the aqueous medium.","PeriodicalId":9794,"journal":{"name":"Catalysts","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139602150","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

The Catalytic Mechanism of [Bmim]Cl-Transition Metal Catalysts for Hydrochlorination of Acetylene 乙炔加氢氯化的[Bmim]Cl-过渡金属催化剂的催化机理

IF 3.9 3区化学

Catalysts Pub Date : 2024-01-23 DOI: 10.3390/catal14020093

Hui Shao, Ying-zhou Lu, Xin Liang, Chunxi Li

引用次数: 0

Manganese- and Nitrogen-Doped Biomass-Based Carbons as Catalysts for the Oxygen Reduction Reaction 作为氧还原反应催化剂的掺锰和掺氮生物质基碳

IF 3.9 3区化学

Catalysts Pub Date : 2024-01-23 DOI: 10.3390/catal14020092

Ance Pļavniece, K. Kaare, D. Šimkūnaitė, A. Balciunaite, V. Jasulaitienė, Gediminas Niaura, A. Volperts, G. Dobele, L. Colmenares-Rausseo, I. Kruusenberg, Loreta Tamašauskaitė-Tamašiūnaitė, E. Norkus

引用次数: 0

Phase Transformation of Zr-Modified LaNiO3 Perovskite Materials: Effect of CO2 Reforming of Methane to Syngas Zr 改性 LaNiO3 包晶材料的相变：二氧化碳转化甲烷为合成气的影响

IF 3.9 3区化学

Catalysts Pub Date : 2024-01-22 DOI: 10.3390/catal14010091

T. V. Sagar, N. Lingaiah, P. S. Sai Prasad, N. N. Tušar, U. L. Štangar

引用次数: 0

Organocatalysts for the Synthesis of Cyclic Carbonates under the Conditions of Ambient Temperature and Atmospheric CO2 Pressure 在常温和大气二氧化碳压力条件下合成环状碳酸盐的有机催化剂

IF 3.9 3区化学

Catalysts Pub Date : 2024-01-22 DOI: 10.3390/catal14010090

Yeongju Seong, Sanghun Lee, Seungyeon Cho, Yoseph Kim, Youngjo Kim

引用次数: 0

Catalytic Reductive Degradation of 4-Nitrophenol and Methyl orange by Novel Cobalt Oxide Nanocomposites 新型氧化钴纳米复合材料催化还原降解对硝基苯酚和甲基橙

IF 3.9 3区化学

Catalysts Pub Date : 2024-01-21 DOI: 10.3390/catal14010089

Hawra A. Bukhamsin, H. Hammud, C. Awada, Thirumurugan Prakasam

{"title":"Catalytic Reductive Degradation of 4-Nitrophenol and Methyl orange by Novel Cobalt Oxide Nanocomposites","authors":"Hawra A. Bukhamsin, H. Hammud, C. Awada, Thirumurugan Prakasam","doi":"10.3390/catal14010089","DOIUrl":"https://doi.org/10.3390/catal14010089","url":null,"abstract":"Cobalt oxide nanocomposites were synthesized and used for the catalytic degradation of 4-nitrophenol (4-NP) and methyl orange (MO). Cobalt oxide nanocomposites PyroHAB9 was prepared by heating cobalt acetylacetonate complex HAB9 at 300 °C, while PyroHAB19 was prepared by heating cobalt acetylacetonate–carboxymethyl cellulose complex at 300 °C. FTIR indicated the presence of Co3O4 species, while Raman spectrum indicated the presence of graphite in PyroHAB19. The SEM morphology of nanocomposites exhibited irregular spherical shape nanoparticles with sizes ranging between 20 to 60 nm. Additionally, nanowires were also seen in HAB19. Also, 2Ɵ peaks in PXRD revealed the formation of Co3O4 in HAB19. Cyclic voltammetry indicated enhanced electrochemical redox activity of HAB19. The structures of the nanocomposites were related to their catalytic activities. The turnover frequency (TOF) values of the catalytic reduction of p-nitrophenol (P-NP) and methyl orange (MO) were greater for HAB19 compared to HAB9 nano-catalysts. Also, the TOF values of the catalytic reduction of MO were greater than that of P-NP by both nano-catalysts. It is obvious that the rate constants of catalytic reductions for MO by metal oxide nanocomposites were greater than the corresponding rate constants for PNP. The highest rate constant was found for PyroHAB19 in MO reduction.","PeriodicalId":9794,"journal":{"name":"Catalysts","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139609608","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

Hydrocarbon-Rich Bio-Oil Production from Ex Situ Catalytic Microwave Co-Pyrolysis of Peanut Shells and Low-Density Polyethylene over Zn-Modified Hierarchical Zeolite 通过锌改性分级沸石对花生壳和低密度聚乙烯进行原位催化微波共热解生产富含烃的生物油

IF 3.9 3区化学

Catalysts Pub Date : 2024-01-21 DOI: 10.3390/catal14010088

Zheng Dong, Yuanchong Yue, Jianmei Bai, Kun Chen, Mei Wang, Quan Bu

{"title":"Hydrocarbon-Rich Bio-Oil Production from Ex Situ Catalytic Microwave Co-Pyrolysis of Peanut Shells and Low-Density Polyethylene over Zn-Modified Hierarchical Zeolite","authors":"Zheng Dong, Yuanchong Yue, Jianmei Bai, Kun Chen, Mei Wang, Quan Bu","doi":"10.3390/catal14010088","DOIUrl":"https://doi.org/10.3390/catal14010088","url":null,"abstract":"Peanut shells, a major economic and oil crop in China, boast an abundant availability and remarkably high lignin content compared to other agricultural residues. Previous work indicated that the modified hierarchical zeolite (Zn-ZSM-5/MCM41) was effective in promoting the conversion of intermediate macromolecules during the lignin pyrolysis reaction and enhancing the yield and selectivity of liquid products. Thereby, this study aims to improve the quality of liquid products in the ex situ catalytic microwave co-pyrolysis of peanut shells and LDPE by utilizing Zn-ZSM-5/MCM41. Employing a compound center experimental design, we optimized reaction conditions through response surface analysis. The impact of microwave pyrolysis temperature and the catalyst-to-feedstock ratio on yield distribution and liquid product selectivity was explored. Results indicated a marginal increase in liquid product yield with rising pyrolysis temperatures. Moreover, an initial increase followed by a subsequent decrease in liquid product yield was observed with an increase in the catalyst-to-feedstock ratio. Optimal conditions of 450 °C and a catalyst-to-peanut hull ratio of 2.34% yielded the highest bio-oil yield at 34.25%. GC/MS analysis of the bio-oil revealed a peak in hydrocarbon content at 68.36% under conditions of 450 °C and a catalyst-to-feedstock ratio of 13.66%. Additionally, the quadratic model effectively predicted bio-oil yield and the selectivity for major chemical components. This study underscores the potential of Zn-ZSM-5/MCM41 in optimizing liquid product quality during catalytic co-pyrolysis, offering insights into bio-oil production and its chemical composition.","PeriodicalId":9794,"journal":{"name":"Catalysts","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139609842","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

Water Oxidation over Au-Pd/TiO2 as a Substitute for Iridium-Based Catalysts 作为铱基催化剂替代物的 Au-Pd/TiO2 上的水氧化作用

IF 3.9 3区化学

Catalysts Pub Date : 2024-01-21 DOI: 10.3390/catal14010087

Khaja Wahab, H. Idriss

{"title":"Water Oxidation over Au-Pd/TiO2 as a Substitute for Iridium-Based Catalysts","authors":"Khaja Wahab, H. Idriss","doi":"10.3390/catal14010087","DOIUrl":"https://doi.org/10.3390/catal14010087","url":null,"abstract":"Water oxidation is one of the most important reactions needed for a transition to a green economy. The reaction relies on extracting electrons from oxygen anions and is commonly studied using homogenous catalysts based on Ru or Ir metals. Because of Ir scarcity and its relative instability in acidic environments, metals to replace it are sought after. In this study, we have synthesized Au-Pd-based catalysts deposited on TiO2 with different ratios in order to mimic IrO2 valence orbitals (Ir5d) by the hybrid valence orbitals of Au5d and Pd4d and compared their heterogeneous catalytic activity for the evolution of O2 from water in the presence of cerium ammonium nitrate (CAN). Au-Pd-based catalysts were found to be active at a particular nominal atomic ratio. At an atomic ratio of 1 Au to 2 Pd and 1 Au to 3 Pd, the catalysts were active and stable for oxygen production from water. Long-term runs up to 20,000 min still showed the expected stoichiometry between O2 production and CAN consumption (1 to 4). However, catalysts with a reverse ratio were not active. Also, the monometallic catalysts were found to be not active for the reaction. We link the reason for the activity of Au-Pd with this specific ratio to the shape and energy position of their valence band that might be similar to those of IrO2 particles. While the turnover numbers of the Au-Pd-based catalysts were found to be lower than those of IrO2-based catalysts, on the same support in a heterogenous system, there is considerable potential upon further optimization for these two metals to replace IrO2 for a water oxidation reaction.","PeriodicalId":9794,"journal":{"name":"Catalysts","volume":null,"pages":null},"PeriodicalIF":3.9,"publicationDate":"2024-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139609914","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