ChemChemTech

New applications of high-quality synthetic diamond in sensors and integrated photonic circuits, which are being rapidly developed nowdays, often demand freestanding diamond membranes with a thickness of about 10 microns as a substrate. However, the process of thin single-crystal diamond membranes fabrication, as well as their subsequent processing are challenging due to the high hardness, chemical resistance and brittleness of the material. Our work demonstrates a method for creating freestanding diamond membranes mounted on a thick diamond substrate using reactive ion etching of single-crystalline diamond wafers in plasma with mechanical protective masks. The optimal thickness of a diamond wafer for membranes etching is determined in the range from 100 to 120 µm with mandatory plane-parallel polishing of the sides. We experimentally studied the interaction of RF discharge SF6 based plasma with diamond surface during deep etching with mechanical protective masks of various shapes. It was found that the use of thick masks leads to an uneven rate of diamond etching over the entire area of the formed membrane. We have assessed ion sputtering resistance of various mask materials in SF6 based plasma, and found the most promising mask materials for deep diamond etching (steel, copper, diamond). We have fabricated diamond membranes with a thickness of 11,5 µm (and more), mounted on a durable 60 µm (and more) thick frames, and studied their characteristics. After etching membrane surface roughness was less than 25 nm, and the unevenness of their thickness did not exceed 20%. Also, we compare different methods for controlling the depth of diamond etching and the thickness of the resulting membranes, including mechanical measurements, IR spectral reflectometry, optical profilometry and electron microscopy. For citation: Golovanov A.V., Yun M.I., Bondarenko M.G., Prosin A.A., Tarelkin S.A. Monocrystalline diamond membranes with a thickness of 10 microns, manufactured by plasma etching. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2024. V. 67. N 10. P. 55-64. DOI: 10.6060/ivkkt.20246710.1y.

Anton V. Golovanov

Maxim I. Yun

Maria G. Bondarenko

Andrei A. Prosin

Sergey A. Tarelkin

IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA

MONOCRYSTALLINE DIAMOND MEMBRANES WITH A THICKNESS OF 10 MICRONS, MANUFACTURED BY PLASMA ETCHING

等离子体刻蚀制备的10微米厚单晶金刚石膜

The stability constants of the nickel(II) complex with 18-crown-6 in aqueous and aqueous ethanol solutions with a content of 0.20 and 0.30 mole fractions of ethanol at 298.15 K. were determined by spectrophotometry. Electronic absorption spectra were recorded in the wavelength range of 250-900 nm and optical densities of 0-4 rel. units. 2 ml of nickel (II) nitrate solution with an initial concentration of 0.13-0.15 mol/l was placed in a standard quartz cuvette (10 mm). A solution of 18-crown-6 with an initial concentration of 0.30-0.40 mol/l was used as a titrant. In the cell the 25 titrant injections of 50 µl were added. Water or a water-ethanol solvent was used as a reference solution. The extinction coefficients of nickel(II) ions were preliminarily determined for wavelengths in the range from 250 to 900 nm in the corresponding solvent, which were used in further calculations. With increasing ethanol concentration, a tendency towards a decrease in the stability of the [Ni18K6]2+ complex particle is observed. The solvation contributions of reagents to the Gibbs energy in the [Ni 18C6]2+formation reaction in aqueous ethanol solutions have been analyzed. The obtained results were analyzed from the standpoint of the solvation approach. Changes in the Gibbs energy of 18C6 solvation at transfer from water to aqueous ethanol solvents are insignificant. Changes in the solvate state of [Ni 18C6]2+ are determined by a change in the solvation of Ni2+(ΔtrG°([Ni 18C6]2+)≈ΔtrG°(Ni2+)) and demonstrate a slight weakening of solvation during the transition from water to X(EtOH) = 0.10 mole fraction. A further increase in the ethanol content in the solvent leads to an increase in the solvation of Ni2+. As a result, changes in the Gibbs transfer energy of the reaction have almost zero values. The results obtained were compared with the thermodynamics of the complexation of silver (I) ion with 18C6 in a water-ethanol solvent. For citation: Usacheva T.R., Kuranova N.N., Kabirzoda D.N., Kryukova O.V. Stability of complexes of Ni(II) and 18-crown-6 ether in water-ethanol solvents. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2024. V. 67. N 10. P. 105-113. DOI: 10.6060/ivkkt.20246710.7061.

Tatiana R. Usacheva

Natalia N. Kuranova

Dzhovidon N. Kabirzoda

Olga V. Kryukova

STABILITY OF COMPLEXES OF Ni(II) AND 18-CROWN-6 ETHER IN WATER-ETHANOL SOLVENTS

水-乙醇溶剂中Ni(II)与18-冠-6醚配合物的稳定性

The paper presents the results of development and research of multifunctional acid oil displacing composition for application in the West Siberian viscous oil field with terrigenous reservoir type. On the basis of the results of physical modeling of oil displacement process the efficiency of multifunctional acid oil-displacing composition has been evaluated in relation to the conditions of viscous oil fields of Western Siberia, which are at early and late stages of development. The oil displacement process with the use of multifunctional acid oil displacing composition was carried out under conditions modeling the natural development mode at the temperature of 23 °С and at the temperature of 90 °С. The study of oil-displacing ability of multifunctional acid composition showed its high efficiency for oil production intensification and oil recovery enhancement of viscous oil fields of Western Siberia with terrigenous reservoirs. The composition provides increase in oil displacement coefficient from high-permeability and low-permeability models of highly heterogeneous reservoir due to high oil-washing properties, as well as equalization of injectivity profile, increase in reservoir coverage coefficient by physical and chemical influence (change of permeability ratio of layers in the reservoir model). As a result of analysis of the components of the composition in the samples taken at the outlet of the model of heterogeneous reservoir, the presence of a large amount of urea in them is shown, and the value of the hydrogen indicator pH during the experiment decreases from 7.2 to 2.4 pH units and then, after heating to 90 °С and subsequent exposure, as a result of partial hydrolysis of urea, which is part of the composition, shifts to the region of neutral values, reaching 6.2 pH units. The composition has low corrosive activity and good solubilizing ability in relation to terrigenous reservoir rock. For citation: Kozlov V.V., Sholidodov M.R., Altunina L.K., Kuvshinov I.V., Saidentsal A.R., Mustafin R.N. Multifunctional acid oil-displacing composition for use in fields with terrigenous reservoir type. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2024. V. 67. N 8. P. 95-102. DOI: 10.6060/ivkkt.20246708.8t.

Vladimir V. Kozlov

Mekhrob R. Sholidodov

Lyubov K. Altunina

Ivan V. Kuvshinov

Anastasia R. Saidentsal

Rustam N. Mustafin

MULTIFUNCTIONAL ACID OIL-DISPLACING COMPOSITION FOR USE IN FIELDS WITH TERRIGENOUS RESERVOIR TYPE

用于陆相储层的多功能酸油置换剂

This paper presents the results of the study of the composition of cracking products of high-sulfur tar obtained from oil of Zyuzeyevskoye field in the presence of radical-forming additive – didodecanoyl peroxide. Thermal treatment of the mixture of vacuum residue with different amounts of didodecanoyl peroxide was carried out at a temperature of 500 °C. The duration of the process was 15 min. Characteristic features of changes in the material balance of the process, group composition of liquid cracking products, qualitative and quantitative composition of newly formed sulfur compounds were established. The use of additive in the amount of 0.5 – 0.75%wt. allows to reduce thermal stability of high-molecular components of tar (resins and asphaltenes), and also promotes change in direction of reactions. Processes of condensation of resins and asphaltenes into solid coke-like products are slowed down, and cracking reactions are initiated with formation of low-molecular components, which fall into the composition of oils, as a result of which it is possible to obtain additional amounts of distillate fractions. It is shown that thiophene, benzo- and dibenzothiophene derivatives, which are absent in the initial tar, are intensively formed and accumulated in the composition of liquid cracking products, which worsens the quality of the obtained distillate fractions. Among the identified sulfur compounds benzothiophene homologs prevail. It was found that cracking of tar in the presence of additive didodecanoyl peroxide promotes deep destruction of sulfur-containing fragments of vacuum residue and asphaltene molecules. Sulfur compounds formed under these conditions not only get into the composition of oils, but also participate in condensation reactions with the formation of solid products, which leads to an increase in the degree of sulfur removal from the composition of liquid cracking products. For citation: Goncharov A.V., Krivtsov E.B. Effect of didodecanoyl peroxide on transformations of high-sulfur vacuum residue components in the process of initiated cracking. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2024. V. 67. N 8. P. 121-128. DOI: 10.6060/ivkkt.20246708.15t.

Aleksei V. Goncharov

Evgenii B. Krivtsov

EFFECT OF DIDODECANOYL PEROXIDE ON TRANSFORMATIONS OF HIGH-SULFUR VACUUM RESIDUE COMPONENTS IN THE PROCESS OF INITIATED CRACKING

二癸二酰过氧化物对引发裂解过程中高硫减压渣油组分转化影响的研究

The study investigated the composition of products resulting from thermal and catalytic cracking of mixtures of deasphaltenized oil from the Karmalskoye field with asphaltenes content of 0.0, 5.2, and 10.4wt.%. The experiments were conducted at a temperature of 450 °C for a duration of 100 min. The catalyst used was a mixture of tungsten carbide and nichrome powders (NiCrWC), in an amount of 0.1%wt. The presence of the NiCrWC additive during cracking of mixtures of deasphaltenized oil with different asphaltenes content has been shown to increase the yield of oils, gasoline, and diesel fractions while reducing the yield of coke and asphaltenes compared to thermal cracking. During the catalytic cracking of all the mixtures studied, the combined yield of gasoline and diesel fractions exceeds 70%wt. It is important to note that an increase in asphaltenes content during catalytic cracking results in a decrease in the yield of gasoline fractions and an increase in the yield of diesel fractions. Studies have demonstrated that the thermal cracking of heavy oil mixtures with different asphaltene contents results in a decrease in the contents of saturated and monoaromatic hydrocarbons, while the contents of biaromatic and triaromatic hydrocarbons increase. Additionally, the presence of asphaltenes has been found to impact the formation of polyaromatic hydrocarbons. During catalytic cracking, the content of saturated, monoaromatic, and biaromatic hydrocarbons increases, while the content of triaromatic and polyaromatic hydrocarbons decreases. During catalytic cracking, the average structure of asphaltene molecules undergoes significant changes. The molecules become smaller, more aromatic, and monoblock, with fewer carbon atoms in the saturated moieties. This catalyst also helps reduce the amount of heteroatoms in the resulting asphaltenes. For citation: Sviridenko N.N., Urazov Kh.Kh., Sergeyev N.S. The effect of asphaltenes quantity on thermal and catalytic cracking product yield of heavy oil from Karmalskoye field. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2024. V. 67. N 8. P. 76-84. DOI: 10.6060/ivkkt.20246708.6t.

Nikita N. Sviridenko

Khoshim Kh. Urazov

Nikita S. Sergeyev

THE EFFECT OF ASPHALTENES QUANTITY ON THERMAL AND CATALYTIC CRACKING PRODUCT YIELD OF HEAVY OIL FROM KARMALSKOYE FIELD

沥青质含量对卡马林斯科耶油田重油热裂解和催化裂解产物收率的影响

Hard carbon is one of the most promising candidates for a negative electrode material for sodium-ion batteries. Now, the design and adaptation of methods for producing hard carbon have gained wide attention in terms of not only ensuring the required electrochemical performance but also reducing production costs and expenses. Herein, we report a method for preparing new functional materials based on hard carbon doped with molybdenum. A viscose was used as a carbon precursor because of its low cost and availability, which made it possible to scale the technology. An ammonium molybdate aqueous solution was applied as the molybdenum source. The synthesis involves following main steps: impregnation of the fiber with a solution of ammonium molybdate and annealing at high temperatures under controlled atmosphere. The study investigates the effects of the type of initial viscose raw material (microfiber, technical thread, non-woven material), molybdenum content (Mo/C weight ratio varied in the range up to 5.1%), temperature (up to 1050 °C), and annealing atmosphere (argon or nitrogen) on the structural parameters, specific surface area, and yield of hard carbon products. The doped hard carbon has an almost 10% higher yield in comparison with the undoped one. It was shown that doping with molybdenum, due to the catalytic effect, stimulates the growth and ordering of graphite-like nanoclusters under the temperature, inducing the structure formation of hard carbon. This leads to a decrease in the temperature of hard carbon production as compared to analogues. It was found that changing the specific surface area with temperature depends on the molybdenum content. The lowest values of specific surface area were found for doped samples synthesized at 1050 °C. For citation: Saenko N.S., Zheleznov V.V., Mayorov V.Yu., Opra D.P. Functional materials based on hard carbon doped with molybdenum: preparation and characterization. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2024. V. 67. N 10. P. 122-130. DOI: 10.6060/ivkkt.20246710.7019.

Nikita S. Saenko

Veniamin V. Zheleznov

Vitaly Yu. Mayorov

Denis P. Opra

FUNCTIONAL MATERIALS BASED ON HARD CARBON DOPED WITH MOLYBDENUM: PREPARATION AND CHARACTERIZATION

基于掺钼硬碳的功能材料：制备与表征

Experimental results of investigation of the original and fluorinated ultra-long double-walled carbon nanotubes (DWCNTs) with a length of at least 1000 μm are presented. The degree of fluoridation did not exceed 27 at.%. It has been shown that the process of fluorination of samples of double-walled carbon nanotubes deforms the outer surface of the nanotube wall although does not destroy its internal concentric structure, while the diameter of the fluorinated nanotube increases by 1.5-2 times. In addition, the fluorinated samples, which were thermochemically purified from iron particles and other forms of carbon before fluorination, demonstrated many split/cut ends of nanotubes. The effect of fluorination on the electrical properties of initial and purified samples of double-walled carbon nanotubes was studied. It was revealed that with an increase in temperature from 80 to 300 K for non-fluorinated and fluorinated purified nanotube samples, the resistivity decreases, which corresponds to the semiconductor nature of the conductivity. It was also revealed that when a sample of initial DWNT is fluorinated, a change in the nature of conductivity from semiconductor to metallic is observed. With an increase in temperature from 80 to 300 K, the resistance of the non-fluorinated sample of the original DWNTs decreased by 45%, while the resistance of the fluorinated sample increased by 11%. Despite the decrease in electrical conductivity as a result of fluorination of the purified samples, all samples remained conductors, which presumably indicates partial fluorination of the outer wall of the DWNTs while maintaining the structure of the inner wall. Thus, fluorination of double-walled carbon nanotubes with a well-aligned and concentric structure leads to the formation of fluorocarbon nanostructures, which can be promising materials for electronic nanodevices. For citation: Karaeva A.R., Khaskov M.A., Kurzhumbaev D.Zh., Kulnitskiy B.A., Mordkovich V.Z. Investigation of fluorinated double-wall carbon nanotubes. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2024. V. 67. N 10. P. 38-48. DOI: 10.6060/ivkkt.20246710.4y.

Aida R. Karaeva

Maxim A. Khaskov

Didar Zh. Kurzhumbaev

Boris A. Kulnitskiy

Vladimir Z. Mordkovich

INVESTIGATION OF FLUORINATED DOUBLE-WALL CARBON NANOTUBES

氟化双壁碳纳米管的研究

Deformation processes in materials affect structure and properties, so they are of interest to researchers. High-resolution transmission electron microscopy and X-ray analysis techniques are used to study deformation in crystalline materials. In this work, diamond particles with sizes ranging from 2 to 15 nm processed in a planetary mill were studied. Analysis of the structure showed a change in the interplanar distances in the particles: the d111 = 0.206 nm characteristic of diamond increased to 0.220 nm. Such lattice expansion is not characteristic of point defects and can be associated only with the breaking of interatomic bonds. The study aims to investigate the deformation mechanisms of diamond under high mechanical stresses, which has implications for potential applications. Carbon-based materials such as diamond have high strength and hardness due to covalent bonds. At temperatures below the Debye temperature diamond is almost immune to dislocation plasticity, making it one of the strongest materials. Plastic deformation of diamond can occur both under the influence of cyclic loading and under the influence of shear stresses, which opens up new prospects for its use in various fields of science and technology. When diamond nanoparticles are processed in a planetary mill, a process of transition of a metastable phase (which diamond is) to a thermodynamically stable state - graphite - is observed. This transition occurs by accumulation of defects in the diamond structure, formation of twins, onions and deformation bands. All this testifies to the complex nature of plastic deformation in diamond. For citation: Gordeeva T.A., Kulnitskiy B.A., Ovsyannikov D.A., Popov M.Yu., Blank V.D. Interplanar distances in diamond deformed as a result of mechanochemical treatment. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2024. V. 67. N 10. P. 49-54. DOI: 10.6060/ivkkt.20246710.2y.

Tatyana A. Gordeeva

Danila A. Ovsyannikov

Mikhail Yu. Popov

Vladimir D. Blank

INTERPLANAR DISTANCES IN DIAMOND DEFORMED AS A RESULT OF MECHANOCHEMICAL TREATMENT

机械化学处理导致变形的金刚石晶面间距

短名
Journal Impact	0.80
国际分区	CHEMISTRY, MULTIDISCIPLINARY(Q4)

ISSN	0579-2991, 2500-3070
h-index	11

涉及主题	化学有机化学材料科学物理生物量子力学工程类复合材料冶金生物化学物理化学化学工程计算机科学无机化学热力学
出版信息	出版商: Ivanovo State University of Chemistry and Technology，出版周期: ，期刊类型: journal，开源期刊: 否
基本数据	创刊年份: 2017，原创研究文献占比: 99.40%，自引率:50.00%， Gold OA占比: 0.00%

ChemChemTech

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MONOCRYSTALLINE DIAMOND MEMBRANES WITH A THICKNESS OF 10 MICRONS, MANUFACTURED BY PLASMA ETCHING

STABILITY OF COMPLEXES OF Ni(II) AND 18-CROWN-6 ETHER IN WATER-ETHANOL SOLVENTS

MULTIFUNCTIONAL ACID OIL-DISPLACING COMPOSITION FOR USE IN FIELDS WITH TERRIGENOUS RESERVOIR TYPE

EFFECT OF DIDODECANOYL PEROXIDE ON TRANSFORMATIONS OF HIGH-SULFUR VACUUM RESIDUE COMPONENTS IN THE PROCESS OF INITIATED CRACKING

THE EFFECT OF ASPHALTENES QUANTITY ON THERMAL AND CATALYTIC CRACKING PRODUCT YIELD OF HEAVY OIL FROM KARMALSKOYE FIELD

MONOCRYSTALLINE DIAMOND MEMBRANES WITH A THICKNESS OF 10 MICRONS, MANUFACTURED BY PLASMA ETCHING

STABILITY OF COMPLEXES OF Ni(II) AND 18-CROWN-6 ETHER IN WATER-ETHANOL SOLVENTS

FUNCTIONAL MATERIALS BASED ON HARD CARBON DOPED WITH MOLYBDENUM: PREPARATION AND CHARACTERIZATION

INVESTIGATION OF FLUORINATED DOUBLE-WALL CARBON NANOTUBES

INTERPLANAR DISTANCES IN DIAMOND DEFORMED AS A RESULT OF MECHANOCHEMICAL TREATMENT