{"title":"Charge Instability of Ellipsoidal Drops of a Conductive Liquid in Electrospraying","authors":"Yu. V. Samukhina, A. K. Buryak","doi":"10.1134/S0036024425701675","DOIUrl":"10.1134/S0036024425701675","url":null,"abstract":"<p>Instability in liquid droplets containing charged macroions is considered, relative to the Rayleigh limit. It is found that beyond the Rayleigh limit, droplets become unstable and form structures with distinct features. Computer modeling is used to track the development of charge instability. The effect the instability of the mechanism of decay of charged droplets has on electrospraying is considered. The stability of charged drops of conducting liquid in the form of ellipsoids is considered. Features of ellipsoidal deformation are described, and the nature of the dependence of the surface density of forces is investigated for different values of the Rayleigh parameter.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 9","pages":"2230 - 2234"},"PeriodicalIF":0.8,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073603","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}
Wenming Jiang, Fang Li, Yani Huang, Jingxia Chen, Chuanyou Peng, Jingjing Yang
{"title":"Organic Synthesis of CuO/g-C3N4 and Photocatalytic Degradation of Tetracycline","authors":"Wenming Jiang, Fang Li, Yani Huang, Jingxia Chen, Chuanyou Peng, Jingjing Yang","doi":"10.1134/S0036024425701481","DOIUrl":"10.1134/S0036024425701481","url":null,"abstract":"<p>To degrade high concentration tetracycline (TET), composite materials CuO/g-C<sub>3</sub>N<sub>4</sub> (CuOCN) were prepared using an organic synthesis method to investigate their degradation effect on TET under visible light. The materials were characterized through X-ray diffraction analysis (XRD), transmission electron microscopy (TEM), UV-visible diffuse reflectance spectrometer (DRS), and X-ray photoelectron spectroscopy (XPS). The toxicity of the degradation products of nhnnnTET was assessed through antibacterial experiments, and the degradation mechanism of TET was studied using quenching agent capture and High-Performance Liquid Chromatography-Mass Spectrometry (HPLC-MS). XRD results confirmed the formation of CuOCN. Photocatalytic experiments demonstrated that CuOCN2 exhibited a relatively effective degradation of TET and could be reused multiple times, with a degradation rate constant value of 0.0095 min<sup>–1</sup>. TEM results revealed a layered structure of both CuO and C<sub>3</sub>N<sub>4</sub>, which were found to be attached together. High-Resolution TEM (HRTEM) showed the combination of the two components in CuOCN2, with CuO displaying two crystal planes. X-ray Energy Dispersive Spectrum (EDS) analysis indicated that the mass fraction of CuO in CuOCN2 was approximately 15%. DRS analysis revealed that the addition of CuO widened the visible light absorption range of the composite materials and reduced the bandgap width. The band gaps of CuOCN1, CuOCN2, and CuOCN3 were 2.45, 2.66, and 2.76 eV, respectively. Photocurrent and photoresistance tests demonstrated the good photoelectric effect of CuOCN2. XPS analysis confirmed that the CuOCN2 composite material possessed the chemical composition and structure both CuO and C<sub>3</sub>N<sub>4</sub>. During the catalytic degradation of TET, four active substances were generated, reducing the toxicity of the degradation products. HPLC-MS analysis revealed that TET underwent reactions such as cracking and cross-linking during degradation, leading to reduced toxicity. This study provides an experimental basis for the degradation of high concentration TET by CuOCN2.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 9","pages":"2039 - 2051"},"PeriodicalIF":0.8,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073697","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}
A. M. Skundin, T. L. Kulova, I. M. Gavrilin, E. V. Chirkova, Yu. O. Kudryashova
{"title":"Effect of the Composition of Lithium-Containing Electrolyte on the Electrochemical Characteristics of Layered Nickel–Cobalt–Aluminum Oxide","authors":"A. M. Skundin, T. L. Kulova, I. M. Gavrilin, E. V. Chirkova, Yu. O. Kudryashova","doi":"10.1134/S0036024425701687","DOIUrl":"10.1134/S0036024425701687","url":null,"abstract":"<p>The electrochemical behavior of the multicomponent layered oxide LiNi<sub>0.8</sub>Co<sub>0.15</sub>Al<sub>0.05</sub>O<sub>2</sub> in an electrolyte containing lithium oxalyl difluoroborate LiF<sub>2</sub>BC<sub>2</sub>O<sub>4</sub> as a supporting salt was studied for the first time. It was shown that the total polarization resistance in this electrolyte is noticeably lower than in an electrolyte based on LiClO<sub>4</sub> in the same solvent, which leads to an increase in the discharge capacity, especially at increased current loads.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 9","pages":"2235 - 2240"},"PeriodicalIF":0.8,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0036024425701687.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Preparation and Properties of VO2(B) Doped with Graphene Oxide As Cathode Material for Aqueous Zinc-Ion Batteries","authors":"Xucheng Wang, Yanyu Zhao, Junyuan Zhong, Fan Zhang, Xinxin Hu, Xiangling Tong, Zheyuan Chen, Yangyang Xie, Junfeng Gao","doi":"10.1134/S0036024425701717","DOIUrl":"10.1134/S0036024425701717","url":null,"abstract":"<p>Aqueous zinc-ion batteries (AZIBs) are recognized for their economical nature, ecological compatibility, and strong safety record. Nevertheless, the task of developing cathode materials that possess both a large capacity and reliable performance remains a formidable issue. Here, we propose using VO<sub>2</sub>(B) doped with graphene oxide (VO<sub>2</sub>/GO) as cathode material for AZIBs, prepared via a straightforward hydrothermal method. Graphene oxide significantly improves the rate at which the cathode reacts and allows the cathode to have a high capacity, resulting in a capacity of 542 mA h g<sup>–1</sup> at 0.5 A g<sup>–1</sup>. This study proposes a promising method to enhance the efficiency of cathode materials containing vanadium, hence expediting the advancement of AZIBs.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 9","pages":"2258 - 2265"},"PeriodicalIF":0.8,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073815","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 Performance Study of Core-Shell Structured SiO2@C Anode Materials with ZIF-8 and PVP As Carbon Sources","authors":"Mingming Zhang, Yue Zhao, Henghua Zhang","doi":"10.1134/S0036024425701699","DOIUrl":"10.1134/S0036024425701699","url":null,"abstract":"<p>At room temperature in aqueous solution, SiO<sub>2</sub> particles modified with PVP on the surface were simultaneously added to the ZIF-8 raw material. Utilizing the adsorption effect of PVP on ZIF-8, ZIF-8 rapidly formed on the surface of SiO<sub>2</sub>, creating a complete coating layer. TEM and XPS results confirmed that the coating structure remained intact after calcination, and the thickness of the amorphous carbon coating layer was 35–55 nm. The obtained SiO<sub>2</sub>@C anode material exhibited excellent electrochemical performance. The first discharge specific capacities of 10% SiO<sub>2</sub>@C and 20% SiO<sub>2</sub>@C were 579.4 and 833.1 mA h/g, respectively, and the first efficiencies were 76.4 and 72.2%, respectively. The material also demonstrated excellent high-rate charge and discharge performance. At a current density of 1.2 A/g, the discharge specific capacities of 10% SiO<sub>2</sub>@C and 20% SiO<sub>2</sub>@C were 270 and 365 mA h/g, respectively. When the current density was restored to a low value, the discharge specific capacities could almost fully recover. The carbon layer formed by ZIF-8 and PVP gave the material good cycling performance. After 240 cycles, the charge specific capacities of 10%SiO<sub>2</sub>@C and 20%SiO<sub>2</sub>@C were still 438.7 and 495.8 mA h/g, respectively.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 9","pages":"2241 - 2248"},"PeriodicalIF":0.8,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073696","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}
A. V. Ul’yanov, I. A. Polunina, K. E. Polunin, A. K. Buryak
{"title":"Heat Resistance of Acrylic Stones","authors":"A. V. Ul’yanov, I. A. Polunina, K. E. Polunin, A. K. Buryak","doi":"10.1134/S0036024425701663","DOIUrl":"10.1134/S0036024425701663","url":null,"abstract":"<p>The heat resistance of acrylic stones during their heating in the temperature range of 250–650 K was studied. Due to their excessive presence in the formulation of some samples, the mineral pigments and fillers facilitate the thermal destruction of the organic components of polymer stones and adversely affect their heat resistance.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 9","pages":"2226 - 2229"},"PeriodicalIF":0.8,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073702","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}
P. R. Vasyutin, M. Yu. Sinev, Yu. A. Gordienko, E. Yu. Lyubimov, E. A. Lagunova, Yu. D. Ivakin
{"title":"Structural Features of Mixed La–Al Oxides and Their Catalytic Properties in the Oxidation of Methane","authors":"P. R. Vasyutin, M. Yu. Sinev, Yu. A. Gordienko, E. Yu. Lyubimov, E. A. Lagunova, Yu. D. Ivakin","doi":"10.1134/S003602442570147X","DOIUrl":"10.1134/S003602442570147X","url":null,"abstract":"<p>The authors study the effect the means of synthesis and preliminary treatment have on the structural features of samples of mixed lanthanum and aluminum oxides with constant atomic ratio La : Al = 1 : 1, along with their catalytic properties during the oxidation of methane. Using organic substances (filter paper or starch) as structuring agents in synthesizing the samples and subjecting them to an aqueous or aqueous–ammonia fluid environment with high-temperature treatment at different stages allows the phase composition, structural characteristics, and morphology of the resulting systems to be varied. It is shown there is no direct correlation between the structural characteristics, morphology, and catalytic properties of La–Al oxides. It is suggested that the efficiency of systems during the oxidation of methane is associated exclusively with the type and concentration of point defects, primarily the state of surface oxygen anions. At the same time, the phase composition and morphology influence the number and type of active centers, and their accessibility to reagents.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 9","pages":"2027 - 2038"},"PeriodicalIF":0.8,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073758","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}
Yu. V. Rekh, M. S. Valova, O. V. Koryakova, A. N. Murashkevich, O. V. Fedorova, G. L. Rusinov
{"title":"Sorption of Rare Earth Cations by SiO2–TiO2-Crown Ether Composites","authors":"Yu. V. Rekh, M. S. Valova, O. V. Koryakova, A. N. Murashkevich, O. V. Fedorova, G. L. Rusinov","doi":"10.1134/S0036024425701638","DOIUrl":"10.1134/S0036024425701638","url":null,"abstract":"<p>The immobilization of crown ethers (dibenzo-18-crown-6, dibenzo-21-crown-7, dibenzo-24-crown-8) during the sol–gel synthesis of mixed oxides SiO<sub>2</sub>–TiO<sub>2</sub> is used to obtain composites that firmly hold an organic molecule in an inorganic matrix, as is confirmed via IR spectroscopy and elemental analysis. The properties of sorption with respect to rare earth element (REE) cations are studied under acidic and neutral conditions. The efficiency (<i>S</i>, %) and capacity (<i>Q</i>, mg/g) of sorption grow substantially upon moving from the initial oxides and crown ethers to their composites. The sorption of REE cations from dilute solutions (2 × 10<sup>−4</sup> mol/dm<sup>3</sup>) is found to be 89.1–95.1% for composite dibenzo-18-crown-6–SiO<sub>2</sub>–TiO<sub>2</sub>, whose sorption capacity for concentrated solutions of rare earth elements (0.1 mol/dm<sup>3</sup>) is 6.1–34.5 mg/g. The sorption of lanthanum cations by composite dibenzo-18-crown-6–SiO<sub>2</sub>–TiO<sub>2</sub> is studied using the isothermal Langmuir (<i>R</i><sup>2</sup> = 0.9915), Freundlich (<i>R</i><sup>2</sup> = 0.8745), Temkin (<i>R</i><sup>2</sup> = 0.9506), and Dubinin–Radushkevich (<i>R</i><sup>2</sup> = 0.9754) models.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 9","pages":"2207 - 2213"},"PeriodicalIF":0.8,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073856","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":"Spreading Index of Melted Alkali Halides over the Charged Surface of Liquid Bismuth","authors":"V. P. Stepanov","doi":"10.1134/S003602442570164X","DOIUrl":"10.1134/S003602442570164X","url":null,"abstract":"<p>The experimental data obtained by measuring the interfacial tension between liquid bismuth and sodium chloride, bromide, or iodide melts in a wide range of voltages are presented and analyzed. In the range of anodic polarization, a critical potential was found, above which the two-phase system loses mechanical stability. The observed phenomenon is associated with the transition of the system to the film mode of surface wetting. The critical wetting potential decreases with increasing polarizability of the salt phase anion. Near the critical potential, the dependence of the wetting index on the applied voltage is quadratic.</p>","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 9","pages":"2214 - 2218"},"PeriodicalIF":0.8,"publicationDate":"2025-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145073703","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}