Russian Journal of Applied Chemistry最新文献_第2页

Pyrolysis of Polyethylene Terephthalate: Process Features and Composition of Reaction Products 聚对苯二甲酸乙二醇酯的热解：工艺特点和反应产物的成分

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2024-08-21 DOI: 10.1134/S1070427223120017

E. M. Zakharyan, A. L. Maksimov

{"title":"Pyrolysis of Polyethylene Terephthalate: Process Features and Composition of Reaction Products","authors":"E. M. Zakharyan, A. L. Maksimov","doi":"10.1134/S1070427223120017","DOIUrl":"10.1134/S1070427223120017","url":null,"abstract":"The need for polyethylene terephthalate recycling is associated with the formation of significant amount of its waste, which should be reprocessed due to the growth of polymer production and consumption of plastic products used in light, chemical, medical industries, in mechanical engineering and instrument making. The main share of polyethylene terephthalate (PET) recycling processes is chemical methods through which various monomers are generated. After purification and modification of these monomers, valuable petrochemical raw materials can be yielded. The review describes the principles and mechanisms of polyethylene terephthalate degradation upon pyrolysis. The influence of the heating rate during pyrolysis (fast, slow), type of raw material (pure polymer, polymer waste), additives (modifiers, stabilizers, fire retardants), type of reactor in the process (horizontal, vertical, fixed bed reactor, fluidized bed reactor, conical tip reactor, rotating dc arc plasma reactor) is considered, as well as the effect of processing conditions such as temperature, amount of raw material, pressure, atmosphere, and presence of catalyst on the quantitative and qualitative composition of oxygen-containing compounds formed in the gas fraction, pyrolysis oil, and semi-coke. The influence of additives of various polymers in a mixture with polyethylene terephthalate on the formation of products (gas fraction, pyrolysis oil, and semi-coke), additives of plant biomass, and food waste is demonstrated. The effect of microwave radiation on the polyethylene terephthalate pyrolysis is considered.","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"96 12","pages":"977 - 1024"},"PeriodicalIF":0.6,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186426","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

Electrochemical Deposition of Iridium onto Gallium Arsenide from a Sulfamate Electrolyte Based on Hexachloroiridic(IV) Acid 基于六氯铱铱（IV）酸的氨基磺酸电解质在砷化镓上电化学沉积铱

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2024-08-21 DOI: 10.1134/S1070427223120066

T. P. Bekezina, M. S. Vaisbekker, V. A. Burmistrova, V. G. Bozhkov

{"title":"Electrochemical Deposition of Iridium onto Gallium Arsenide from a Sulfamate Electrolyte Based on Hexachloroiridic(IV) Acid","authors":"T. P. Bekezina, M. S. Vaisbekker, V. A. Burmistrova, V. G. Bozhkov","doi":"10.1134/S1070427223120066","DOIUrl":"10.1134/S1070427223120066","url":null,"abstract":"The nature of cathodic polarization in an iridium-plating electrolyte based on a sulfamate solution of H2[IrCl6] was studied. Spectroscopic analysis shows that the iridium electrolyte contains binuclear oxygen-bridged Ir(III, IV) sulfamate complexes. The microstructure and distribution profiles of the iridium deposit in contacts of different diameters were studied. The structure of the iridium deposit is highly dispersed. The nonuniformity of the iridium deposit profile over the contact area and the dependence of the deposit thickness on the contact diameter can be reduced by varying the hydrodynamic conditions of the metal electroplating (stirring of the electrolyte with a magnetic stirrer or ultrasound) and by using electrochemical polarization. The Ir–GaAs contacts with the Schottky barrier are characterized by high quality of electrophysical parameters and good reproducibility of the volt–ampere characteristics. A decrease in the thickness of the iridium deposit and of the n-GaAs epitaxial layer leads to an increase in the barrier height of the rectifying Ir–GaAs contacts.","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"96 12","pages":"1063 - 1075"},"PeriodicalIF":0.6,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186427","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

Adsorption Study of Eriochrome Black T Dye on Polyacrylonitrile Chromium molybdate Composite 聚丙烯腈铬钼酸盐复合材料对 Eriochrome Black T 染料的吸附研究

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2024-08-20 DOI: 10.1134/S1070427224020125

Y. F. El-Aryan, S. Melhi

引用次数: 0

Optimization and Characterization of a New Environmentally Friendly Adsorbent to Remove Mercury Ions from Aqueous Solutions 用于去除水溶液中汞离子的新型环保吸附剂的优化与表征

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2024-08-20 DOI: 10.1134/S1070427224020137

Mahsa Rahimi Sadr, Biuck Habibi, Naser Samadi

{"title":"Optimization and Characterization of a New Environmentally Friendly Adsorbent to Remove Mercury Ions from Aqueous Solutions","authors":"Mahsa Rahimi Sadr, Biuck Habibi, Naser Samadi","doi":"10.1134/S1070427224020137","DOIUrl":"10.1134/S1070427224020137","url":null,"abstract":"Mercury metal ions are very toxic, the presence of this metal and its derivatives, which are harmful even in very small amounts to the health of all organisms, was found in the study area. The purpose of this study is determination and elimination of Hg (II) ions from drinking water and aqueous environments. Modified and activated carbon produced from local plantain bark has been considered to be suitable and environmentally friendly material for mercury (II) ions removal in water treatments. 85% phosphoric acid chemical activator was used, It is then heated to 450°C for 5 h to carry out carbonization. The absorbent was characterized by SEM. Removal was performed by passing water containing ions through a column containing the adsorbent The prepared adsorbent well removed mercury ions from the aqueous solution, measuring of concentration mercury ions in samples from the inlet and outlet of the column was performed by two different methods, spectrophotometric determination at 492 nm with dithizone and atomic absorption (equipped with cold vaper apparatus) spectroscopy CVAAS, the results were almost the same. The various parameters such as pH, with (6–8), contact time (0.5, 1, 2, and 3 h), concentrations of metal ions entering the system (0.25, 0.5, 0.75, and 1 ppm), and agitation speed were investigated on adsorption effect. The efficiency of this absorbent for removal of Hg (II) ions is 87%. It can be used several times, which shows that this is a good adsorbent for elimination of mercury ions of real samples such as drinking water and industrial wastewaters, due to its ease of use, low cost and relatively good performance. The elimination method is simple, sensitive, inexpensive, fast, usable and vital for the peoples in this area","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"97 3","pages":"346 - 352"},"PeriodicalIF":0.6,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186432","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 the Silicon Deposition on the Industrial Silicon Trapping Catalyst 硅沉积对工业硅捕集催化剂的影响

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2024-08-20 DOI: 10.1134/S1070427224020071

Xiaozhen Chen, Li Liu, Chengmin Yang, Bumei Zheng, Xiaoying Yin, Jin Sun, Yunhai Yao, Weiyu Duan

{"title":"Influence of the Silicon Deposition on the Industrial Silicon Trapping Catalyst","authors":"Xiaozhen Chen, Li Liu, Chengmin Yang, Bumei Zheng, Xiaoying Yin, Jin Sun, Yunhai Yao, Weiyu Duan","doi":"10.1134/S1070427224020071","DOIUrl":"10.1134/S1070427224020071","url":null,"abstract":"The structure and surface properties of the industrial silicon trapping catalysts were characterized by XRF, XPS, XRD, NH3-TPD and NMR. The silicon trapping mechanism of the industrial silicon trapping catalyst was discussed. The results showed that the silicon capacity reached 28.17% during this lifetime. The captured silicon mainly existed on the surface of the silicon trapping catalyst as amorphous silicon with abundant Q species including Si(OSi)4, Si(OSi)3(OX), Si(OSi)2(OX)2, and Si(OSi)(OX)3, proving the silicon was caputured as the amorphous silicon bilayer deposition model. After silicon deposition, the pore properties of the silicon trapping catalyst changed greatly. Compared with the fresh catalyst, the specific surface area and pore volume of the spent industrial silicon trapping catalyst decreased by 49.17% and 22.92% respectively. The deposition of silicon leaded to the loss of acid sites and changed the interaction between the support and the active metal, which result in the reduction of the number of active metal species. This may explain how the deposited silicon is related to the deactivation of the hydrotreating catalysts.","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"97 3","pages":"313 - 321"},"PeriodicalIF":0.6,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224545","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

Bio-Nanocomposite Hydrogel Beads Based on Cellulose and Biogenic Silver Nanoparticles Prepared by ex-situ and in-situ Methods for Antibacterial Applications 基于纤维素和生物银纳米颗粒的生物纳米复合水凝胶珠的原位和就地制备法抗菌应用

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2024-08-20 DOI: 10.1134/S1070427224020149

Mohammed F. Silwadi, A. H. Bhat, Alathraa Mubarak Alrahbi, Hala Qassim Albattashi, Fatma Ali Albattashi, Hanan Saif Alabri

{"title":"Bio-Nanocomposite Hydrogel Beads Based on Cellulose and Biogenic Silver Nanoparticles Prepared by ex-situ and in-situ Methods for Antibacterial Applications","authors":"Mohammed F. Silwadi, A. H. Bhat, Alathraa Mubarak Alrahbi, Hala Qassim Albattashi, Fatma Ali Albattashi, Hanan Saif Alabri","doi":"10.1134/S1070427224020149","DOIUrl":"10.1134/S1070427224020149","url":null,"abstract":"This study describes the fabrication and characterization of nanocomposite hydrogel beads based on Cellulose and synthesized silver nanoparticles (Ag-NPs) prepared by insitu and exsitu methods. The silver nanoparticles were synthesized by reducing silver nitrate (AgNO3) by Sodium borohydrate (NaBH4). Cellulose/Ag-NPs hydrogel beads were prepared using calcium chloride as the cross-linker. The hydrogel beads were characterized using FTIR and XRD. Moreover, swelling property of the cellulose /Ag-NPs hydrogel beads was investigated. The Ag release profile of the hydrogels was obtained for the amount of Ag released using Atomic Absorption spectroscopy (AAS). The cumulative release of Ag-NPs was estimated by measuring the absorbance at 405 nm of samples obtained at various time intervals. The exsitu and insitu nanocomposite hydrogels showed greater swelling behavior in comparison with virgin cellulose hydrogel. Both insitu and exsitu cellulose/Ag-NPs presented good antibacterial activities against Escherichia coli and Bacillus and with maximum zones of inhibition 12 ± 2 mm more than the pristine cellulose hydrogel thereby, have great pharmacological potential and a suitable level of safety for use in the biological systems.","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"97 3","pages":"362 - 370"},"PeriodicalIF":0.6,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186431","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

Investigation of the Tribological and Mechanical Properties of Electroless Ni-P-hBN Nano-Composite Coating 化学镍-P-hBN 纳米复合涂层的摩擦学和力学性能研究

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2024-08-20 DOI: 10.1134/S1070427224020162

Asghar Saberi, Vahid Javanbakht

引用次数: 0

Fabrication and Assessment of Co-TiO2/Ag3PO4 Z-Scheme Photocatalyst for Improved Methylene Blue Degradation 制备和评估用于改进亚甲基蓝降解的 Co-TiO2/Ag3PO4 Z 型光催化剂

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2024-08-20 DOI: 10.1134/S1070427224020150

Mingxia Tian, Xindong Wang, Yumin Yan, Yuan Zhang, Guyu Zhang, Tianyi Cui, Jianbo Zhao, Jianhui Jiang

{"title":"Fabrication and Assessment of Co-TiO2/Ag3PO4 Z-Scheme Photocatalyst for Improved Methylene Blue Degradation","authors":"Mingxia Tian, Xindong Wang, Yumin Yan, Yuan Zhang, Guyu Zhang, Tianyi Cui, Jianbo Zhao, Jianhui Jiang","doi":"10.1134/S1070427224020150","DOIUrl":"10.1134/S1070427224020150","url":null,"abstract":"Water resources are crucial for human life. However, current water resource treatment methods have limitations. In this regard, photocatalysis is a promising water resource treatment technology with a simple operation, green environmental protection, and high economic benefits. Therefore, this study prepared a Co-TiO2/Ag3PO4 (CTAP) photocatalyst for the treatment of water resources. Here, a Co-TiO2/Ag3PO4 photocatalyst was prepared using a hydrothermal method combined with calcination. Under visible light irradiation, the methylene blue (MB) degradation degree of CTAP composite reached 96.4% within 14 min, and the degradation rate constant was 0.23516 min–1. These reaction rates are 137 and 3.4 times higher than those of pure TiO2 and Ag3PO4 samples, respectively. Thus, doping and heterojunctions significantly improved the photocatalytic performance of CTAP composites, primarily due to grain size reduction of TiO2 after Co2+ doping. The formation of a close interfacial connection with Ag3PO4 increased the active site of the reaction and promoted the transfer of photogenerated charges, thus improving the photocatalytic performance of CTAP composites. According to the photocatalytic capture experiments of the active species, e-, h+, •O2–, and •OH play a common role in the degradation of MB. This paper provides insights into the design and preparation of a Z-scheme photocatalyst that can be considered for the degradation of pollutants in water.","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"97 3","pages":"322 - 333"},"PeriodicalIF":0.6,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186435","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

Studying the Effect of Chemical Activated Kaolinite on Organic Matter Adsorption from Crude Phosphoric Acid (H3PO4) 研究化学活化高岭石对粗磷酸（H3PO4）有机物吸附的影响

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2024-08-20 DOI: 10.1134/S1070427224020095

W. M. Youssef, A. A. Elzoghby, E. M. Helmy, Khalil A. Khalil, H. S. Gado, A. A. Rateb

引用次数: 0

Preparation of Au Nanoparticle Loaded Biochar/Polydopamine Composites for Adsorption of MB and MG Dyes from Aqueous Solution 制备负载金纳米粒子的生物炭/多巴胺复合材料以吸附水溶液中的 MB 和 MG 染料

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2024-08-20 DOI: 10.1134/S1070427224020113

Hui Li, Dongxue Shen, Zhe Yang, Guojia Ji, Zhiwei Zhang, Xulin Lu, Jingmei Zhang, Zhongbao Zhao

{"title":"Preparation of Au Nanoparticle Loaded Biochar/Polydopamine Composites for Adsorption of MB and MG Dyes from Aqueous Solution","authors":"Hui Li, Dongxue Shen, Zhe Yang, Guojia Ji, Zhiwei Zhang, Xulin Lu, Jingmei Zhang, Zhongbao Zhao","doi":"10.1134/S1070427224020113","DOIUrl":"10.1134/S1070427224020113","url":null,"abstract":"Au nanoparticles loaded on biochar (PDA-BC/Au) was prepared using adhesion and reduction properties of polydopamine by in-situ reduction method. PDA-BC/Au was characterized by the specific surface area analyzer (BET), the scanning electron microscope (SEM), the transmission electron microscopy (TEM), X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectrometry (FTIR). Analysis results prove the successful synthesis of composites decorated with Au nanoparticles in the biochar matrix coating with polydopamine layer. PDA-BC/Au was employed as an adsorbent to remove the cationic dyes (MB and MG) from aqueous solution. The tests confirm that PDA-BC/Au can remove up to 99.0% of MB within 30 min and achieve removal rate over 97.2% of MG after 60 min adsorption. Adsorption kinetics and isotherm models reflect that the adsorption of dyes by PDA-BC/Au has a better fit with pseudo-secondary kinetic equation and the Langmuir adsorption model, displaying chemisorption-dominated single-molecule layer adsorption mechanism. Additionally, after five recycling cycles, the removal rates of PDA-BC/Au for MB and MG only dropped by 3.10 and 2.58% respectively, making clear good stability for long term use. Collectively, the developed PDA-BC/Au adsorbent indicates enormous promise for cationic dye removal and efficient utilization of waste biomass resources.","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"97 2","pages":"246 - 255"},"PeriodicalIF":0.6,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186433","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