Refraction of Hydrosols Containing Diamond/Amorphous Carbon Composite Particles

IF 1.4 4区化学 Q4 CHEMISTRY, PHYSICAL Colloid Journal Pub Date : 2024-05-07 DOI:10.1134/S1061933X24600040

O. S. Vezo, A. V. Voitylov, V. V. Vojtylov, M. P. Petrov, A. A. Trusov

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Abstract

Refractometric studies of hydrosols containing diamond nanoparticles have been carried out in this work. The samples for the study have been obtained from a statically synthesized diamond powder preliminarily subjected to standard purification by washing with strong acids and sonication. After additional repeated washing, centrifugation, sonication, and settling for a month, samples, whose particles contained different fractions of amorphous carbon, have been obtained. The particle size in the obtained samples was smaller than 100 nm. To analyze the data of refractometric measurements, equations have been derived that make it possible to determine the fraction of amorphous carbon in the particles and to calculate the thickness of its layer on the particle surface from the results of studying the refractive index and density of the sols of diamond particles. The data of the refractometric studies have been used to determine the ratios between the fractions of crystalline diamond and amorphous carbon in the particles. The performed studies have shown that the refractometric analysis of particle composition can be used to control the quality of industrially produced nanodiamonds.

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含金刚石/无定形碳复合颗粒的水溶液的折射率

摘要-这项工作对含有金刚石纳米颗粒的水溶液进行了折射研究。用于研究的样品是从静态合成的金刚石粉末中获得的，初步经过了强酸洗涤和超声处理的标准净化。经过反复清洗、离心、超声和沉淀一个月后，获得了颗粒中含有不同部分无定形碳的样品。所得样品的粒径小于 100 纳米。为了分析折射测量的数据，我们推导出了一些方程式，可以根据金刚石颗粒溶胶的折射率和密度研究结果，确定颗粒中无定形碳的比例，并计算出颗粒表面无定形碳层的厚度。折射率研究数据用于确定颗粒中结晶金刚石和无定形碳的比例。研究结果表明，颗粒成分的折射分析可用于控制工业化生产的纳米金刚石的质量。

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来源期刊

Colloid Journal 化学-物理化学

CiteScore

2.20

自引率

18.20%

发文量

审稿时长

6-12 weeks

期刊介绍： Colloid Journal (Kolloidnyi Zhurnal) is the only journal in Russia that publishes the results of research in the area of chemical science dealing with the disperse state of matter and surface phenomena in disperse systems. The journal covers experimental and theoretical works on a great variety of colloid and surface phenomena: the structure and properties of interfaces; adsorption phenomena and structure of adsorption layers of surfactants; capillary phenomena; wetting films; wetting and spreading; and detergency. The formation of colloid systems, their molecular-kinetic and optical properties, surface forces, interaction of colloidal particles, stabilization, and criteria of stability loss of different disperse systems (lyosols and aerosols, suspensions, emulsions, foams, and micellar systems) are also topics of the journal. Colloid Journal also includes the phenomena of electro- and diffusiophoresis, electro- and thermoosmosis, and capillary and reverse osmosis, i.e., phenomena dealing with the existence of diffusion layers of molecules and ions in the vicinity of the interface.