Russian Journal of Applied Chemistry最新文献_第5页

Solubilization of Gossypol with Polyvinylpyrrolidone 用聚乙烯吡咯烷酮增溶棉酚

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2024-08-21 DOI: 10.1134/S1070427223120054

M. G. Mukhamediev, D. A. Gafurova, D. Zh. Bekchanov, D. N. Shakhidova, T. Kh. Rakhimov

引用次数: 0

Addition Polymerization of 3,3-Disubstituted Cyclopropenes in the Presence of a Palladium Complex Containing an Acyclic Diaminocarbene Ligand 含无环二氨基羰基配体的钯络合物作用下 3,3-二取代环丙烯的加成聚合反应

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2024-08-21 DOI: 10.1134/S1070427223120042

E. I. Medentseva, A. P. Khrychikova, E. V. Bermesheva, K. V. Potapov, M. V. Bermeshev

{"title":"Addition Polymerization of 3,3-Disubstituted Cyclopropenes in the Presence of a Palladium Complex Containing an Acyclic Diaminocarbene Ligand","authors":"E. I. Medentseva, A. P. Khrychikova, E. V. Bermesheva, K. V. Potapov, M. V. Bermeshev","doi":"10.1134/S1070427223120042","DOIUrl":"10.1134/S1070427223120042","url":null,"abstract":"Addition polymerization of 3-methyl-3-phenylcyclopropene and 3,3-di(n-propyl)cyclopropene in the presence of a palladium complex containing an acyclic diaminocarbene ligand was studied. When activated with the organoborate (Na+[B(3,5-(CF3)2C6H3)4]–), such complex catalyzes the addition polymerization of substituted cyclopropenes. The polymerization occurs selectively without opening of the cyclopropane ring. The copolymerization of 3,3-di(n-propyl)cyclopropene with a monomer of the norbornene series (5-ethylidene-2-norbornene) was monitored by a decrease in the intensity of the characteristic signals in the 1H NMR spectra of the corresponding monomers. The substituted cyclopropenes were found to be more active monomers than norbornenes in the addition polymerization. The addition homopolymers of 3-methyl-3-phenylcyclopropene and 3,3-di(n-propyl)cyclopropene were characterized by differential scanning calorimetry, thermogravimetric analysis, and X-ray diffraction.","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"96 12","pages":"1048 - 1056"},"PeriodicalIF":0.6,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224539","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

CrOx–SiO2 Catalysts in Nonoxidative Propane Dehydrogenation: Effect of Adding Cerium Dioxide CrOx-SiO2 催化剂在非氧化性丙烷脱氢中的应用：添加二氧化铈的影响

IF 0.6 4区化学

Russian Journal of Applied Chemistry Pub Date : 2024-08-21 DOI: 10.1134/S1070427223120029

I. Yu. Kaplin, E. V. Golubina, A. V. Gorodnova, E. S. Lokteva, M. A. Galkin, A. V. Fionov, O. Ya. Isaikina, A. V. Shumyantsev, K. I. Maslakov

{"title":"CrOx–SiO2 Catalysts in Nonoxidative Propane Dehydrogenation: Effect of Adding Cerium Dioxide","authors":"I. Yu. Kaplin, E. V. Golubina, A. V. Gorodnova, E. S. Lokteva, M. A. Galkin, A. V. Fionov, O. Ya. Isaikina, A. V. Shumyantsev, K. I. Maslakov","doi":"10.1134/S1070427223120029","DOIUrl":"10.1134/S1070427223120029","url":null,"abstract":"The effect that introduction of cerium oxide into oxide systems based on chromium and silicon exerts on the catalytic properties of these systems in nonoxidative propane dehydrogenation in a flow-through system with a fixed catalyst bed was studied. The characteristics of the catalysts CrOx–SiO2 and CrOx–CeO2–SiO2, both containing 9 wt % CrOx assuming the Cr2O3 stoichiometry, were compared. The СеО2 content of the ternary system was 52 wt %. The catalysts were characterized by X-ray diffraction analysis, scanning electron microscopy, Raman spectroscopy, electron paramagnetic resonance, X-ray photoelectron spectroscopy, temperature-programmed reduction with hydrogen, and thermal analysis. In the initial period of the reaction, the catalyst containing CeO2 demonstrated higher propane conversion at 500 and 550°С and higher deactivation rate compared to CrOx–SiO2. Both catalysts can be regenerated by treatment in an air stream at 550°С for 30 min. Cerium dioxide favors the reduction of chromium in high oxidation states to form active reaction sites, Cr3+ ions, ensures higher dispersity of the chromium oxides, and favors partial oxidation of coke deposits in the initial period of the catalyst operation.","PeriodicalId":757,"journal":{"name":"Russian Journal of Applied Chemistry","volume":"96 12","pages":"1025 - 1040"},"PeriodicalIF":0.6,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142186428","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

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