Kinetics and Catalysis最新文献_第2页

Synthesis of Effective NiO/Ni/g-C3N4 Photocatalysts for CO2 Reduction under Visible Light Irradiation

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2025-02-25 DOI: 10.1134/S0023158424602699

K. O. Potapenko, A. Yu. Kurenkova, D. D. Mishchenko, E. Yu. Gerasimov, Enkhsaruul Byambajav, E. A. Kozlova

{"title":"Synthesis of Effective NiO/Ni/g-C3N4 Photocatalysts for CO2 Reduction under Visible Light Irradiation","authors":"K. O. Potapenko, A. Yu. Kurenkova, D. D. Mishchenko, E. Yu. Gerasimov, Enkhsaruul Byambajav, E. A. Kozlova","doi":"10.1134/S0023158424602699","DOIUrl":"10.1134/S0023158424602699","url":null,"abstract":"Photocatalytic reduction of CO2 is one of the promising strategies for synthesising valuable organic compounds and solving both energy and environmental problems. In the present work, NiO/Ni/g-C3N4 photocatalysts were synthesised. Initially, g-C3N4 was prepared by calcination of melamine and urea and then modified by photodeposition of a NiO/Ni co-catalyst on its surface. The structure of the photocatalysts was confirmed by X-ray phase analysis, UV–Vis diffuse reflection spectroscopy, and high-resolution transmission electron microscopy. The highest activity in the reaction of photocatalytic CO2 reduction was demonstrated by 2 wt % (NiO/Ni)/g-C3N4 and 3 wt % (NiO/Ni)/g-C3N4, equal to 13.2 and 12.4 μmol g–1 h–1, respectively. It is worth noting that in this case, an almost 3-fold increase in the reaction rate was achieved compared to the pristine g-C3N4. The deposition of NiO/Ni on g-C3N4 solves two fundamental problems: adsorption of CO2 and separation of photogenerated electrons and holes. The present work demonstrates an approach to the synthesis of active catalysts, in particular an approach to design a hybrid NiO/Ni co-catalyst for efficient photocatalytic CO2 conversion.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"65 6","pages":"724 - 732"},"PeriodicalIF":1.3,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481288","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

Influence of Synthesis Conditions of Nanosized Titanium Dioxide on the Structure and Phase Composition

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2025-02-25 DOI: 10.1134/S0023158424602389

A. A. Sushnikova, A. A. Valeeva, A. V. Zhurenok, I. S. Sipatov, A. A. Rempel

引用次数: 0

Radical Chain Oxidation of Methyl Oleate as a Model System for Studying the Activity and Concentration of Antioxidants in Evening Primrose Oil and Borage Seed Oil

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2025-02-25 DOI: 10.1134/S0023158424602419

L. R. Yakupova, R. L. Safiullin

引用次数: 0

Ozone-Enhanced Selective Catalytic Reduction of NOx by Ammonia: A Comparative Study of Fe-Beta and V2O5–WO3/Al2O3 Catalysts

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2025-02-25 DOI: 10.1134/S0023158424602183

D. A. Bokarev, I. V. Paramoshin, G. N. Baeva, G. O. Bragina, A. Yu. Stakheev

引用次数: 0

Piezo-Enhanced Photocatalytic Activity of BaTiO3-Doped Polyvinylidene Fluoride Nanofibers

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2025-02-25 DOI: 10.1134/S0023158424602407

D. A. Selimov, A. A. Rabadanova, A. O. Shuaibov, A. G. Magomedova, M. G. Abdurakhmanov, R. R. Gulakhmedov, Sh. M. Ramazanov, A. A. Amirov, D. S. Sobola, F. F. Orudzhev

{"title":"Piezo-Enhanced Photocatalytic Activity of BaTiO3-Doped Polyvinylidene Fluoride Nanofibers","authors":"D. A. Selimov, A. A. Rabadanova, A. O. Shuaibov, A. G. Magomedova, M. G. Abdurakhmanov, R. R. Gulakhmedov, Sh. M. Ramazanov, A. A. Amirov, D. S. Sobola, F. F. Orudzhev","doi":"10.1134/S0023158424602407","DOIUrl":"10.1134/S0023158424602407","url":null,"abstract":"In recent decades, with population growth and rapid industrialization, the contamination of water resources has become a pressing concern, with organic pollutants, heavy metals, and other complex compounds playing a significant role. Consequently, the development of novel materials that can harness natural energy and employ it for wastewater treatment represents a crucial objective. In this study, a PVDF/BaTiO3 composite membrane was synthesized via the electrospinning method. The synthesized materials were subjected to investigation by means of scanning electron microscopy (SEM), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The incorporation of BaTiO3 resulted in a notable reduction in fiber diameter, with a 2.9-fold decrease observed. Fourier transform infrared spectroscopy (FTIR) revealed that the β-phase fraction decreased from 87.3 to 74.3%, while the γ‑polymorph increased from 10.7 to 20.9%. The catalytic properties of the composite were investigated by subjecting it to the decomposition of methylene blue. The photocatalytic process yielded 61% decomposition, the piezocatalytic process yielded 77% decomposition, and the piezophotocatalytic process (simultaneous exposure to ultrasound and UV-visible light) yielded 98% decomposition in 60 min. The synergetic effect of the two processes was 33.7%. The oxidation mechanism in piezo- and piezophotocatalysis is based on the action of hydroxyl radicals (•OH). Experimental evidence has demonstrated that the membrane generates voltages more than 20 V under ultrasound conditions, thereby promoting silver reduction. These materials have the potential to contribute significantly to the degradation of dyes and the purification of aqueous media, thereby facilitating the development of more efficient and sustainable water treatment methods.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"65 6","pages":"682 - 694"},"PeriodicalIF":1.3,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481048","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

Erratum to: Effect of K and Ni Promoters on Mo2C/Al2O3 Catalyst for Higher Alcohols Synthesis from Syngas

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2025-02-25 DOI: 10.1134/S0023158424960012

Zhi Yang, Mingsheng Luo, Qinglong Liu, Chenmeng Li, Yatao Wang, Hongjuan Li, Lifei Yao

引用次数: 0

Photocatalytic Formation of Hydrogen Peroxide in Aqueous Suspensions of Titanium Dioxide Supported with Palladium

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2025-02-25 DOI: 10.1134/S0023158424602432

T. R. Fazliev, A. V. Bukhtiyarov, D. S. Selishchev

引用次数: 0

Study of Catalytic Activity of Graphitic Carbon Nitride in Photocatalytic Hydrogen Evolution: Comparison of Modification Approaches with One and Two Different Halogens

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2025-02-25 DOI: 10.1134/S0023158424602390

A. V. Zhurenok, D. V. Markovskaya, V. A. Lomakina, A. A. Saraev, E. Yu. Gerasimov, E. A. Kozlova

{"title":"Study of Catalytic Activity of Graphitic Carbon Nitride in Photocatalytic Hydrogen Evolution: Comparison of Modification Approaches with One and Two Different Halogens","authors":"A. V. Zhurenok, D. V. Markovskaya, V. A. Lomakina, A. A. Saraev, E. Yu. Gerasimov, E. A. Kozlova","doi":"10.1134/S0023158424602390","DOIUrl":"10.1134/S0023158424602390","url":null,"abstract":"In this work, graphitic carbon nitride samples modified simultaneously with bromine and iodine were prepared using a two-step synthesis method. The composition and physicochemical properties of the prepared samples were investigated by a set of physicochemical methods including X-ray diffraction (XRD) analysis, low-temperature nitrogen adsorption, diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), thermal analysis, cyclic voltammetry, and impedance spectroscopy. The catalytic properties of the synthesized samples were measured under the illumination of an aqueous alkaline solution of triethanolamine. The samples simultaneously modified with bromine and iodine showed higher catalytic activity compared to the samples modified with bromine or iodine alone. A maximum catalytic activity of 2400 μmol h–1 g–1 was obtained in the presence of a 0.5% Pt/0.4Br–0.1I sample. Cyclic experiments showed that the samples modified with bromine or iodine alone showed higher photostability, as a result of which modification with one halogen allows the process of photocatalytic hydrogen evolution to be carried out with higher efficiency.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"65 6","pages":"649 - 662"},"PeriodicalIF":1.3,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481050","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

NaBH4 Hydrolysis over Silver Nanoparticles Synthesized via Combustion Route

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2024-12-11 DOI: 10.1134/S0023158424601517

Bahaa M. Abu-Zied, Tarek T. Ali, Lamia Adly

{"title":"NaBH4 Hydrolysis over Silver Nanoparticles Synthesized via Combustion Route","authors":"Bahaa M. Abu-Zied, Tarek T. Ali, Lamia Adly","doi":"10.1134/S0023158424601517","DOIUrl":"10.1134/S0023158424601517","url":null,"abstract":"Solution combustion synthesis (SCS) is a powerful route for synthesizing a wide range of nanostructures. The fine adjustment of the experimental parameters (fuel type, fuel/oxidizer ratio, pretreatment temperature, etc.) plays a crucial role in controlling the structural as well as the textural features of the resulting nanomaterial. In this study, we investigate the synthesis of silver nanoparticles (Ag NPs) using the combustion method with glycine as a fuel. The calcination of the silver nitrate/glycine precursor was performed over a temperature range of 150–600°C. The obtained Ag NPs were characterized by XRD, FTIR, TEM, and XPS techniques. XRD diffraction patterns revealed that the development of Ag NPs started at 150°C. FTIR spectroscopy confirmed the presence of various functional groups in the calcined samples. TEM images revealed that increasing the temperature from 200 to 600°C resulted in a morphology change from accumulated spheres into inter-welded capsules. XPS analysis detected Ag, O, and C at the surface of the prepared Ag NPs. NaBH4 hydrolysis, at the temperature range of 30–50°C, was chosen for evaluating the activity of the prepared Ag NPs. It was found that the activity increased with increasing reaction temperature, with the optimal activity exhibited by the sample calcined at 400°C. The investigation was extended to check the effect of various parameters including NaBH4 weight, alkalinity, and recycling on the activity of the optimal catalyst.","PeriodicalId":682,"journal":{"name":"Kinetics and Catalysis","volume":"65 6","pages":"806 - 817"},"PeriodicalIF":1.3,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143481252","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

Innovative Synthesis and Catalytic Proficiency of Mg/Al/La Mixed Oxide Catalysts in Glycerol Transesterification with Dimethyl Carbonates

IF 1.3 4区化学

Kinetics and Catalysis Pub Date : 2024-12-11 DOI: 10.1134/S0023158423601328

M. Malyaadri, K. Jagadeeswaraiah, T. Narasimha murthy, PRG. Nallappa reddy

引用次数: 0