Mechanochemical Synthesis of Nanocomposites with Specified Composition in the Presence of a Solvent for Precursors

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-04-10 DOI:10.1134/S1061933X23601245

F. Kh. Urakaev

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Abstract

The objective of this work is an attempt to introduce into scientific practice the method of “mechanochemical recrystallization” in solid-phase systems with small additives of a liquid solvent. Dimethyl sulfoxide (DMSO), a universal bipolar aprotic solvent, has been used as the additive. As an example, the mechanical activation of reaction AgNO₃ + NH₄I + z NH₄NO₃ (diluent) + yS + xDMSO = AgI + yS* + (z+1)NH₄NO₃ + xDMSO has been studied, where z ≈ 5, y ≈ 1, and x \( \ll \) 1 are molar fractions. The formation of sulfur (S*) and silver iodide (AgI) nanoparticles has been revealed, and/or S*/AgI nanocomposites with controlled contents of the components have been synthesized. The use of NH₄NO₃, which is a non-target product of the mechanosynthesis, as a diluent leads to the stabilization of nanoparticle sizes. The nanoparticles are formed in the medium of DMSO due to the conventional recrystallization (continuous process of dissolution–crystallization of sulfur) or the reactional recrystallization (process of dissolution of AgNO₃ and NH₄I followed by their interaction with the AgI crystallization) rather than the direct mechanical activation. The former and latter mechanisms are realized when obtaining S* and AgI, respectively. The target products (S*, AgI, and S*/AgI) are purified from water-soluble components (NH₄NO₃, DMSO) by washing in an ultrasonic bath. The proposed technical solution of the problem has been realized in planetary ball mills with different milling tools.

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在前驱体溶剂存在的情况下以机械化学方法合成具有特定成分的纳米复合材料

摘要这项工作的目的是尝试在固相体系中引入 "机械化学重结晶 "方法，并加入少量液体溶剂。二甲基亚砜（DMSO）是一种通用的双极性无水溶剂，被用作添加剂。例如，研究了 AgNO3 + NH4I + z NH4NO3（稀释剂） + yS + xDMSO = AgI + yS* + (z+1)NH4NO3 + xDMSO 反应的机械活化，其中 z ≈ 5、y ≈ 1 和 x \( \ll \) 1 是摩尔分数。研究揭示了硫（S*）和碘化银（AgI）纳米粒子的形成，和/或合成了成分含量可控的 S*/AgI 纳米复合材料。使用机械合成的非目标产物 NH4NO3 作为稀释剂可稳定纳米粒子的尺寸。纳米颗粒在二甲基亚砜介质中的形成是由于传统的再结晶（硫的溶解-结晶连续过程）或反应再结晶（AgNO3 和 NH4I 溶解后与 AgI 结晶相互作用的过程），而不是直接的机械活化。在获得 S* 和 AgI 时分别采用了前一种和后一种机制。目标产物（S*、AgI 和 S*/AgI）通过在超声波浴中洗涤，从水溶性成分（NH4NO3、DMSO）中提纯出来。所提出的问题技术解决方案已在使用不同研磨工具的行星球磨机中实现。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.