Russian Journal of Physical Chemistry A最新文献_第9页

Preparation, Characterization, and Adsorption Kinetics of Magnetic Chitosan/Nano-Corn Straw Cellulose Composite for the Adsorption of Cr6+ 壳聚糖/纳米玉米秸秆纤维素复合材料吸附Cr6+的制备、表征及吸附动力学

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2025-07-06 DOI: 10.1134/S0036024425701043

Chi Wang, Ziwei Zhang, Lin Meng, Gang Wang, Ruibo Xu

{"title":"Preparation, Characterization, and Adsorption Kinetics of Magnetic Chitosan/Nano-Corn Straw Cellulose Composite for the Adsorption of Cr6+","authors":"Chi Wang, Ziwei Zhang, Lin Meng, Gang Wang, Ruibo Xu","doi":"10.1134/S0036024425701043","DOIUrl":"10.1134/S0036024425701043","url":null,"abstract":"In this study, we have synthesized a novel composite material by integrating corn straw cellulose with magnetic chitosan, resulting in the formation of magnetic chitosan/nano-corn straw cellulose composite (MCS/NCCE). The structure was characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD) analyses. Using a systematic single-factor experimental design, coupled with a comprehensive investigation into adsorption kinetics and isotherm studies, we have identified the optimal conditions for adsorption efficacy. The adsorption kinetics align with the Sips isotherm model, indicating that the adsorption of Cr6+ encompasses not only uniform monolayer adsorption but also non-uniform multilayer adsorption. This suggests the presence of multiple active sites on the adsorbent surface. Furthermore, the robustness of the MCS/NCCE was demonstrated through its ability to maintain an adsorption rate of 75% even after four consecutive cycles of use. This study significantly contributes to the valorization of agricultural by-products, such as corn straw, by exploring innovative pathways for their utilization and promoting the circular economy through the recycling of waste materials. The development of MCS/NCCE not only advances the field of environmental science but also aligns with the growing demand for eco-friendly and cost-effective solutions in the management of heavy metal pollution.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 7","pages":"1637 - 1647"},"PeriodicalIF":0.8,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162285","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}

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Electrokinetic Properties of Suspensions of Nano- and Microsized Particles 纳米和微细颗粒悬浮液的电动力学性质

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2025-07-06 DOI: 10.1134/S0036024425700992

E. G. Kalinina, D. S. Rusakova, L. V. Ermakova

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Experimental Study of Electric Conductivity of MPO3(M2WO4)–V2O5 (M = Na, K) Melts MPO3(M2WO4) -V2O5 （M = Na， K）熔体电导率的实验研究

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2025-07-06 DOI: 10.1134/S0036024425701067

A. M. Hasanaliev, P. N. Hasanalieva, A. I. Rasulov

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Co-Precipitation Synthesis of Pd/CuS Heterojunction Composites for Catalytic Reduction of Nitroaromatic Compounds 共沉淀法合成Pd/ cu异质结复合材料催化还原硝基芳香族化合物

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2025-07-06 DOI: 10.1134/S0036024425700888

V. Balchander, V. Sumalatha, Dasari Ayodhya, R. Shyam Sunder

{"title":"Co-Precipitation Synthesis of Pd/CuS Heterojunction Composites for Catalytic Reduction of Nitroaromatic Compounds","authors":"V. Balchander, V. Sumalatha, Dasari Ayodhya, R. Shyam Sunder","doi":"10.1134/S0036024425700888","DOIUrl":"10.1134/S0036024425700888","url":null,"abstract":"In this study, pristine (CuS) and binary heterostructured Pd doped CuS (Pd/CuS composite) as catalysts were synthesized in aqueous solution by chemical co-precipitation method without any capping or stabilizing agent. The fabricated samples were characterized using different tools including UV-vis DRS, PL, powder XRD, TEM, and BET surface area measurements. Hexagonal crystal structure of pure and binary Pd/CuS composite were authenticated by XRD patterns. TEM images indicated that sphere-shape of nanoparticles through a size ranging from 10–15 nm. The optical absorption edge moved to higher energies with Pd concentration (0.72%) as indicated by UV–Vis spectroscopy. UV–Vis analysis showed that the optical energy band gap changed in the presence of Pd doping. The catalytic performance of the pure and Pd/CuS composites were assessed by evaluating the reduction of nitroaromatic compounds such as 4-nitro phenol (4‑NP, 95.42%) and 4-nitro aniline (4-NA, 93.55%) using NaBH4 as a reducing agent in 24 min of reaction. The 0.72% Pd doped CuS nanoparticles provide evidence for high-quality catalytic activity. The catalytic reduction analysis proved that the products have a higher percentage of reduction after doping and it is proving to be an efficient and cost effective nanocatalyst for waste water treatment.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 7","pages":"1517 - 1526"},"PeriodicalIF":0.8,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162292","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}

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Phase Equilibrium Study of LiBr–PEG4000/6000–H2O in a 298.2 K/308.2 K Ternary System 298.2 K/308.2 K三元体系中lib - peg4000 /6000 - h2o的相平衡研究

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2025-07-06 DOI: 10.1134/S0036024425700931

Xingbing Yang, Zaiyu Liu, Shuang Huang, Xinye Wang, Xin Liu, Yu Zhang

{"title":"Phase Equilibrium Study of LiBr–PEG4000/6000–H2O in a 298.2 K/308.2 K Ternary System","authors":"Xingbing Yang, Zaiyu Liu, Shuang Huang, Xinye Wang, Xin Liu, Yu Zhang","doi":"10.1134/S0036024425700931","DOIUrl":"10.1134/S0036024425700931","url":null,"abstract":"As an important energy storage raw material, lithium has extensive research and application value. The phase equilibrium systems of LiBr–PEG4000–H2O and LiBr–PEG6000–H2O at 298.2 K and LiBr–PEG4000–H2O at 308.2 K were experimentally studied, and the effects of PEG4000/6000 at 298.2/308.2 K on the phase equilibrium were examined using the isothermal dissolution method, the refractive index standard curve method and the two-liquidus equation method. The results show that the phase diagrams for all three equilibrium systems contain six phase regions: one unsaturated phase region (L); one two-liquid phase region (2L); one two-liquid–one-solid phase region (2L + S); two one-liquid–one-solid phase region (L + S); the solid phase is LiBr; and one-liquid–two-solid region (L + 2S). The salting-out ability of PEG to LiBr decreases as the temperature increases, whereas the solubilities of PEG and LiBr increase. At the same temperature, the salting-out ability of PEG 4000/6000 to LiBr is similar. However, as the molecular weight of PEG increases, the salting-out rate tends to increase, and the solubility of PEG decreases. Additionally, the area of the unsaturated liquid region (L) also decreases.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 7","pages":"1555 - 1565"},"PeriodicalIF":0.8,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162691","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}

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Hydrogen Production from Oxalic Acid in the Presence of Tantalum-containing Composites under Ultraviolet and Visible Light Irradiation 紫外光和可见光下含钽复合材料存在下草酸制氢研究

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2025-07-06 DOI: 10.1134/S0036024425701109

L. N. Skvortsova, T. V. Tatarinova, I. A. Artyukh, K. A. Bolgaru

{"title":"Hydrogen Production from Oxalic Acid in the Presence of Tantalum-containing Composites under Ultraviolet and Visible Light Irradiation","authors":"L. N. Skvortsova, T. V. Tatarinova, I. A. Artyukh, K. A. Bolgaru","doi":"10.1134/S0036024425701109","DOIUrl":"10.1134/S0036024425701109","url":null,"abstract":"The photocatalytic activity of silicon nitride-based iron-containing composites synthesized by the combustion of ferrosilicon aluminum (FSA) with tantalum additives (5, 10, 15 wt % Ta) in H2 production from aqueous solutions of H2C2O4 under UV and visible light irradiation is studied. Using the X-ray diffraction method, it is found that the main phases of the ceramic matrix of the composites are β-Si3N4 and α-Fe; in addition, a TaON semiconductor phase is detected. The morphological features of the samples are studied by electron microscopy. The composite synthesized from FSA with 10% Ta exhibits the highest photocatalytic activity, which is attributed to the optimum composite structure of Si3N4–TaON–Fe. The mechanisms of H2C2O4 adsorption and photocatalytic H2 evolution from H2C2O4 in the presence of Ta-containing composites synthesized from FSA and a mixture of elemental powders (silicon, aluminum) with 10% Ta are studied with and without the addition of H2O2. It is found that the dependence of the photocatalytic H2 evolution on the H2C2O4 concentration can be described in terms of the Langmuir–Hinshelwood model. The highest rate of H2 evolution from H2C2O4 (6.34 μmol min−1) is achieved in the case of adding H2O2 in the presence of the iron-containing composite; this fact is attributed to the occurrence of both heterogeneous and homogeneous photocatalysis processes.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 7","pages":"1695 - 1704"},"PeriodicalIF":0.8,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162788","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}

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Investigation of Structural, Elastic, Electronic, and Thermodynamic Properties of CaXH3 (X = Ti, V) for Hydrogen Storage Applications 储氢材料CaXH3 （X = Ti， V）的结构、弹性、电子和热力学性质研究

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2025-07-06 DOI: 10.1134/S0036024425700967

R. Ksouri, I. Djaghout, M. Derdare, Y. Mezari, R. Merdes, A.-G. Boudjahem

{"title":"Investigation of Structural, Elastic, Electronic, and Thermodynamic Properties of CaXH3 (X = Ti, V) for Hydrogen Storage Applications","authors":"R. Ksouri, I. Djaghout, M. Derdare, Y. Mezari, R. Merdes, A.-G. Boudjahem","doi":"10.1134/S0036024425700967","DOIUrl":"10.1134/S0036024425700967","url":null,"abstract":"In this manuscript, we have studied the structural, elastic, electronic and thermodynamic properties of CaXH3 (X = Ti, V) for hydrogen storage applications using DFT calculations. The generalized gradient approximation in the Perdew-Burke-Ernzerhof (PBE) form is used in this work to investigate the properties of the above compounds. The calculated optimized lattice constants are 3.8185 and 3.7163 Å for CaTiH3 and CaVH3, respectively. The thermodynamic stability for the studied compounds is confirmed by the negative formation energy calculations. The elastic properties results show good mechanical stability. The phonon spectra calculation confirms the dynamical stability of the compound CaVH3. The determined band structure and density of states (DOS) profiles indicate the metallic nature for these compounds. Additionally, CaTiH3 and CaVH3 exhibit brittle behavior, as evidenced by both calculated Pugh’s and Poisson’s ratios. The specific heat capacities ({{C}_{V}}), thermal expansion coefficients (alpha ) and Debye temperature (theta ) were also investigated and discussed in detail. The obtained values of (theta ) were found to be 590.174 K for CaTiH3 and 644.342 K for CaVH3. The hydrogen storage capacity is found 3.217 and 3.115% for CaTiH3 and CaVH3, respectively. Furthermore, the hydrogen desorption temperatures obtained are 393.85 K for CaTiH3 and 358.28 K for CaVH3, both of which fall within the recommended decomposition temperature range of 298–473 K.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 7","pages":"1585 - 1593"},"PeriodicalIF":0.8,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162368","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}

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Enhanced Photocatalytic Activity of a Novel Ag3VO4/MIL-125/g-C3N4 Composite for the Degradation of Pollutants under Visible Light Irradiation 新型Ag3VO4/MIL-125/g-C3N4复合材料在可见光下降解污染物的光催化活性增强

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2025-07-06 DOI: 10.1134/S0036024425701110

Yuning Liang, Baohui Wang, Tongxin Xiao, Boyin Zhai

{"title":"Enhanced Photocatalytic Activity of a Novel Ag3VO4/MIL-125/g-C3N4 Composite for the Degradation of Pollutants under Visible Light Irradiation","authors":"Yuning Liang, Baohui Wang, Tongxin Xiao, Boyin Zhai","doi":"10.1134/S0036024425701110","DOIUrl":"10.1134/S0036024425701110","url":null,"abstract":"In this work, we have fabricated a novel Ag3VO4/MIL-125(Ti)/g-C3N4 photocatalyst by two-step facile solvothermal synthesis method, which characterized by XRD, SEM, TEM, FT-IR, XPS, BET, UV‒Vis DRS, and PL. The photocatalytic degradation activity of as-prepared materials was studied via decomposing Rh B, and the possible mechanism of photocatalytic degradation was put forward. The result displayed that the specific surface area of a series of composites is larger than that of the single Ag3VO4 (SBET = 9.374 m2/g) and g-C3N4 (SBET = 12.26 m2/g), and the photocatalytic efficiency is much higher than that of pure Ag3VO4, MIL-125(Ti), and g-C3N4. Among them, the photocatalytic activity of AMG-4 composites (SBET = 58.603 m2/g, Eg = 2.71 eV) is the highest, about 15.2, 18.2, and 6.22 times of pure Ag3VO4, MIL-125(Ti), and g-C3N4, respectively. At the same time, the Ag3VO4/MIL-125(Ti)/g-C3N4 composite can maintain a stable photocatalytic activity and structure after five cycles.","PeriodicalId":767,"journal":{"name":"Russian Journal of Physical Chemistry A","volume":"99 7","pages":"1705 - 1716"},"PeriodicalIF":0.8,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162369","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}

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Physicochemical Methods for Analysis of Microimpurity Contents in Hydrogen Peroxide 过氧化氢中微量杂质含量的物理化学分析方法

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2025-07-06 DOI: 10.1134/S0036024425701055

A. N. Glushko, N. S. Goguev, A. K. Buryak, Sh. L. Guseinov

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Study of the Photochemical Reactions of Thiomethylpropyl Ketone Using the CIDNP Effect 利用CIDNP效应研究硫甲基丙基酮的光化学反应

IF 0.8 4区化学

Russian Journal of Physical Chemistry A Pub Date : 2025-07-06 DOI: 10.1134/S0036024425701092

V. I. Porkhun, N. A. Kuznetsova, D. V. Zavyalov, E. N. Savelyev, Yu. V. Bogdanova

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