Russian Journal of Applied Chemistry最新文献

{"title":"Optical Properties and Photocatalytic Activity of the CeО2/SnO2 Thin-Film Heterostructure","authors":"D. M. Skryleva,&nbsp;O. S. Khalipova,&nbsp;S. A. Kuznetsova","doi":"10.1134/S1070427224040086","DOIUrl":"10.1134/S1070427224040086","url":null,"abstract":"<p>The discharge of wastewater without proper treatment gives rise to environmental problems. One of the ways to solve them is photocatalytic decomposition of organic pollutants in wastewater. This method attracts researchers’ attention as being simple and cheap. Powdered semiconductor oxide materials exhibiting good adsorption properties toward organic compounds, photochemical stability, and nontoxicity are mainly used as photocatalysts. Tin(IV), titanium(IV), zinc(II), and cerium(IV) oxides exhibit such properties. The possibility of using as photocatalysts thin-film materials, which can be readily separated from the treated water, has been demonstrated recently. In addition, it is known that heterostructures enhance the photocatalytic activity of the material, in particular, by decreasing the bandgap, which allows more efficient absorption of visible light by the substance. This study compares the optical properties of the SnO₂, CeO₂, and CeO₂/SnO₂ thin-film materials on quartz supports. The materials were prepared by the sol–gel method from film-forming solutions based on cerium(III) nitrate and/or tin(IV) chloride with salicylic acid. The film thickness and refractive index were studied by ellipsometry, and the transmittance was examined by spectrophotometry. The photocatalytic properties of CeO₂/SnO₂ thin-film materials were demonstrated in the model reaction of the decomposition of an organic dye, Methylene Blue, under UV irradiation (312 nm) in the daylight and in the dark. Films with the CeO₂/SnO₂ heterostructure having the thickness of 124 nm, refractive index of 1.33, and transmittance higher than 70% in the wavelength range 440–1000 nm absorb the visible light more efficiently than the SnO₂ and CeO₂ thin-film materials do. The photocatalytic activity of CeO₂/SnO₂ films under UV irradiation in the daylight is higher than that under UV irradiation in the dark. The amount of Methylene Blue decomposing under UV irradiation in the daylight is 1.2 times larger than that decomposing under UV irradiation for the same time in the dark.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"97 4","pages":"448 - 453"},"PeriodicalIF":0.6,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844735","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":"Diclofenac Degradation in Aqueous Solutions Using Advanced Oxidative Processes","authors":"L. N. Skvortsova,&nbsp;V. M. Makarova,&nbsp;K. A. Dychko,&nbsp;K. A. Bolgaru","doi":"10.1134/S1070427224040050","DOIUrl":"10.1134/S1070427224040050","url":null,"abstract":"<p>The photocatalytic activity of iron-containing metal–ceramic composites based on silicon nitride modified with semiconductor tantalum oxo compounds in oxidative degradation of diclofenac (DCF) was studied. The composites were synthesized by autowave combustion of ferrosilicoaluminum with different additions (5, 10, 15 wt %) of tantalum metal in a nitrogen atmosphere. The phase composition was determined by X-ray diffraction and IR spectroscopy, and the content of elements in local surface areas was quantitatively evaluated by electron microprobe analysis. The activity of composites under the conditions of heterogeneous photocatalysis, heterogeneous photocatalysis combined with photo-Fenton and Peroxone processes under UV irradiation, and catalytic ozonation under UV and visible light irradiation was studied. The combination of heterogeneous photocatalysis and Peroxone process is the most effective. The Lаngmuir–Hinshelwood scheme was applied to elucidate the mechanism of DCF photocatalytic degradation.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"97 4","pages":"422 - 428"},"PeriodicalIF":0.6,"publicationDate":"2024-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844730","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":"Lignin-Based Adhesives: Extraction, Chemical Modification, and Challenges in Production","authors":"Seyed Naser Razavi,&nbsp;Maryam Nikzad,&nbsp;Masoumeh Taherimehr","doi":"10.1134/S1070427224030029","DOIUrl":"10.1134/S1070427224030029","url":null,"abstract":"<p>This review article explores the potential of lignin as a sustainable alternative to conventional petroleum-based adhesives. Conventional adhesives derived from petroleum sources have been widely used in industrial, medical, and household applications. However, the depletion of petroleum resources and environmental and human health concerns have prompted the search for bio-based and environmentally friendly alternatives. Lignin, a biodegradable substance abundant in nature, has emerged as a promising substitute due to its non-toxic nature, three-dimensional structure, and functional groups. Replacing the chemicals used in conventional adhesives with lignin can reduce production costs, and the resulting adhesives exhibit decreased toxicity. Furthermore, lignin can be combined with biobased materials to create bio-based adhesives. This article provides an overview of lignin extraction methods, explores the diverse applications of lignin in various industries, discusses chemical modifications of lignin, and specifically focuses on the production of lignin-based adhesives. Finally, the challenges associated with lignin-based adhesive production are addressed.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"97 3","pages":"297 - 312"},"PeriodicalIF":0.6,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672713","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":"Synthesis of Hierarchical MeAPO-5 Molecular Sieve and Optimization of Its Catalytic Oxidation of Benzene to Phenol Based on Response Surface Method","authors":"Yuwei Zhang,&nbsp;Jiali Wang,&nbsp;Lijie Zheng,&nbsp;Hui Shao","doi":"10.1134/S1070427224030017","DOIUrl":"10.1134/S1070427224030017","url":null,"abstract":"<p>This study reports the hydrothermal synthesis of hierarchical aluminum phosphate molecular sieves doped with V, Cu, Fe, and Ni. The catalysts were characterized by XRD, SEM, EDS, XPS, NH₃-TPD, and N₂ adsorption-desorption from the perspectives of structure, morphology, acidity pore size, etc., which confirmed that the metals successfully infiltrated the molecular sieve skeleton. The synthesized D-MeAPO-5 molecular sieve was applied to the oxidation of benzene to the preparation of phenol. It was found that the catalytic effect of the D-VAPO-5 molecular sieve was superior to other catalysts. The conversion rate of benzene and selectivity of phenol were 27.0% and 80.4%, respectively, indicating that the activation ability of the C-H bond on the V-benzene ring was stronger. For optimal experimental design, the response surface method was carried out using D-VAPO-5 as the catalyst and phenol yield as the response value. In addition, a quadratic model was established for four influencing factors and phenol yield, and the significance of the factors was found to be as follows: reaction temperature&gt;H₂O₂ dosage&gt;catalyst dosage&gt;reaction time.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"97 3","pages":"334 - 345"},"PeriodicalIF":0.6,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672706","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":"Investigation of Kinetic, Isotherm and Studying Adsorption Efficiency of Cd(II), Zn(II) by Low-Cost Activated Carbon","authors":"R. R. Abd-Alhamid,&nbsp;W. M. Youssef,&nbsp;M. M. N. Khalil,&nbsp;I. R. Mohamed,&nbsp;A. A. Shiha","doi":"10.1134/S1070427224030042","DOIUrl":"10.1134/S1070427224030042","url":null,"abstract":"<p>The goal of this investigation effort was to organize activated carbon from olive stone through by 0.01 M D₂EHPA. The adsorption ability of carbon with cadmium and zinc existed also studied. Focuses of metals were examined through using flame atomic absorption spectrophotometry. The factors that disturb the adsorption, such as contact time, acid concentration, solid liquid ratio, RPM, and temperature, have been considered and enhanced conditions were determined. The results showed that the maximum adsorption capacities of carbon were found to Cd²⁺ and Zn²⁺with 28.0 and 22.17 mg/g, respectively. The Langmuir adsorption model might be used to clarify the adsorption isotherm with the pseudo-second order and The Cd²⁺ and Zn²⁺sorption process onto the olive stone (OS) occurred spontaneously (­–Δ<i>G</i>), in an exothermic nature (–Δ<i>H</i>), and with increased non randomness (–Δ<i>S</i>).</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"97 3","pages":"353 - 361"},"PeriodicalIF":0.6,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672705","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":"Preparation and Sensing Applications of PAMgA/GL Conductive Hydrogels with Antifreezing, High Toughness and High Adhesion","authors":"Kai Wang,&nbsp;Yutong Zhang,&nbsp;Jiankang Hu,&nbsp;Haiyue Wang","doi":"10.1134/S1070427224030030","DOIUrl":"10.1134/S1070427224030030","url":null,"abstract":"<p>In this paper, magnesium acrylate (AMgA) was used as the polymerization monomer, glycerol (GL) was used as the modifier, ammonium persulfate (APS) and triethanolamine (TEA) were selected as the redox initiation system to prepare polymagnesium acrylate/glycerol (PAMgA/GL) supramolecular conductive hydrogels by free radical polymerization. The antifreezing property, water retention, tensile properties, adhesion, self-healing property, conductivity and strain sensing properties of the hydrogels were analyzed. The results revealed that: when the GL content was 30 wt %, the PAMgA/GL hydrogels exhibited excellent toughness, the tensile strength was 0.152 MPa, and the elongation at break can reach 534%, the conductivity was 0.277 S m^–1, and the four times adhesion strength to 0.0407 MPa. When the tensile strain reached 500%, the gauge factor (GF) was 2.45, exhibiting great strain sensing properties. In addition, the PAMgA/GL hydrogels demonstrated good antifreezing property, water-retention and self-healing properties. The results of this study provide theoretical guidance for the design and preparation of new materials for human body detection.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"97 3","pages":"382 - 393"},"PeriodicalIF":0.6,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672712","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":"Surface Modification of Kosa Silk Fiber by Graft Copolymerization with Vinyl Benzyl Trimethylammonium Chloride (VBT) and Its Antibacterial Study","authors":"Anjali Verma,&nbsp;Sandeep Kumar,&nbsp;Alka Tiwari,&nbsp;Wasim Akram,&nbsp;Satish Kumar Sen,&nbsp;Y. K. Bhardwaj","doi":"10.1134/S1070427224030054","DOIUrl":"10.1134/S1070427224030054","url":null,"abstract":"<p>The recent outbreak of Covid-19 has led to great awareness about microbial infections which have emerged as one of the most challenging threats to human life during the pandemic times. While exploring the antibacterial properties in a variety of compounds, quaternary ammonium compounds (QAC) have been recognized as a potential class of antibacterial compounds. In the present study, surface modification of Kosa silk was achieved by graft copolymerization of vinyl benzyl trimethyl ammonium chloride (VBT) by redox polymerization, employing ceric ammonium nitrate (CAN) as an initiator in the presence of nitric acid as catalyst. The grafted silk material was characterized by various analytical techniques like SEM, DSC, FTIR, and XRD. The KS-g-VBT was evaluated for its antibacterial potential by employing <i>S. aureus</i> and <i>E. coli</i> bacteria following the Agar well method. It was observed that the grafted Kosa silk inhibited the growth of Gram-positive (<i>S. aureus</i>) and Gram-negative (<i>E. coli</i>) bacteria.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"97 5","pages":"515 - 525"},"PeriodicalIF":0.6,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844813","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":"Sorption of Gases in Additive Polynorbornene with Norbornyl Substituents","authors":"M. A. Zotkin,&nbsp;D. A. Alentiev,&nbsp;S. E. Sokolov,&nbsp;M. V. Bermeshev","doi":"10.1134/S1070427223120030","DOIUrl":"10.1134/S1070427223120030","url":null,"abstract":"<p>Sorption of carbon dioxide, methane, and hydrogen in additive poly(5-norbornyl-2-norbornene) was studied at pressures in the interval 0–10 bar and temperatures in the interval 10–60°C. The isotherms obtained were described by the double sorption model including both Langmuir and Henry sorption models. The double sorption model parameters and the gas solFigubility coefficients in the polymer at different pressures and at infinite dilutions were determined. The solubility selectivity values were calculated from the data obtained. The highest solubility selectivity for the CO₂/CH₄ gas pair is reached at 20°С. Owing to high values of this selectivity, additive poly(5-norbornyl-2-norbornene) can be considered as a candidate membrane material for the separation of gas mixtures containing CO₂.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"96 12","pages":"1041 - 1047"},"PeriodicalIF":0.6,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186404","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":"Design, Synthesis, and Fungicidal Activity of 2-Alkylthio-5-(1,2,4-triazol-1-ylmethyl)-1,3,4-oxadiazoles","authors":"G. V. Tsaplin,&nbsp;S. A. Kazakov,&nbsp;M. I. Semchukova,&nbsp;E. A. Alekseeva,&nbsp;A. L. Alekseenko,&nbsp;I. M. Chernega,&nbsp;S. V. Popkov","doi":"10.1134/S1070427223120078","DOIUrl":"10.1134/S1070427223120078","url":null,"abstract":"<p>A procedure was developed for preparing 2-alkylthio-5-(1,2,4-triazol-1-ylmethyl)-1,3,4-oxadiazoles by alkylation of 5-(1<i>Н-</i>1,2,4-triazol-1-ylmethyl)-1,3,4-oxadiazole-2-thione with β-bromophenetoles in the presence of triethylamine in acetone with up to 90% yield. The <i>in vitro</i> tests of the target compounds for fungicidal activity toward six species of phytopathogenic fungi of different taxonomic classes show that the S-halophenoxyethyl-substituted derivatives surpass a reference fungicide, Triadimefon, in the activity toward <i>Venturia inaequalis</i>, <i>Rhizoctonia solani</i>, and <i>Bipolaris sorokiniana</i>.</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"96 12","pages":"1076 - 1085"},"PeriodicalIF":0.6,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224541","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":"Hydrogen Decrepitation of NdFeB End-of-Life Magnets with the Preliminary Three-Step Surface Cleaning","authors":"E. K. Grachev,&nbsp;A. S. Buinovsky,&nbsp;A. V. Muslimova,&nbsp;V. M. Ilekis,&nbsp;E. Yu. Kartashov,&nbsp;M. S. Syrtanov,&nbsp;M. A. Kruglyakov,&nbsp;V. I. Sachkov","doi":"10.1134/S107042722312008X","DOIUrl":"10.1134/S107042722312008X","url":null,"abstract":"<p>The hydrogen decrepitation of end-of-life NdFeB magnetic alloys was studied. End-of-life magnets extracted from PC hard drives were taken as a material for the experiments. The choice of these items is governed by their low cost, easy removal from PC, and small size. The magnets were demagnetized at 623 K in a medium vacuum for 4 h, which was followed by three-step cleaning of their surface to remove the electroplated coating, oxidized surface layer, and adsorbed impurities and moisture. The first step of the cleaning was sandblasting with slag shot fed at a pressure of 300 kPa. The second step was chemical etching with solutions of dilute acids (1–3% HCl, HNO₃, or H₂SO₄ in distilled water), followed by washing in acetone. The third step was heat treatment in a vacuum, consisting in rapid heating in a shaft furnace of magnet samples placed after etching in an autoclave, with several exposures in the temperature interval 373–573 K in a medium vacuum. After these operations, the samples were quenched by placing the hot autoclave into a vessel with ice-cold water, preceded by filling the autoclave with argon. Then, alloys of the NdFeB system without removing from the autoclave were subjected to hydrogen decrepitation performed in the temperature interval from 298 to 473 K at an excess hydrogen pressure of 30 to 210 kPa to determine how these parameters influence the properties of the hydride powders obtained and the amount of hydrogen taken up. The hydrogen for the decrepitation was generated by direct desorption from the heated hydride of the LaNi₅ alloy. In the pressure range 30–70 kPa and room temperature, alloys of the NdFeB system transform into hydrides. The chemical reaction with hydrogen starts instantaneously without a period of primary hydrogen adsorption. The hydride powders obtained, containing no less than 0.459 wt % hydrogen, are very brittle and can be finely milled (100-g portion) in a planetary ball mill within 6 min to obtain a powder with the particle size smaller than 20 μm. The analysis of the surface of the finely milled hydride powder particles revealed no oxygen (≤1 wt %).</p>","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"96 12","pages":"1086 - 1093"},"PeriodicalIF":0.6,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186429","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}