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Abstract <p>Main synthetic routes to bismuth-containing functional materials from basic bismuth nitrates with the compositions [Bi<sub>6</sub>O<sub>4</sub>(OH)<sub>4</sub>](NO<sub>3</sub>)<sub>6</sub>·H<sub>2</sub>O and [Bi<sub>6</sub>O<sub>5</sub>(OH)<sub>3</sub>](NO<sub>3</sub>)<sub>5</sub>·3H<sub>2</sub>О, which are high-purity products of hydrolytic processing of technological solutions with respect to the content of metal impurities relative to bismuth, are considered. Basic bismuth oxalate and bismuth(III) oxide salicylate with the compositions BiOH(C<sub>2</sub>O<sub>4</sub>) and BiO(C<sub>7</sub>H<sub>5</sub>O<sub>3</sub>), respectively, were obtained by treatment of basic bismuth nitrates with solutions of the corresponding carboxylic acids. The compositions of the compounds were identified by X-ray phase and chemical analyses, IR and Raman spectroscopy, and thermogravimetry. The conditions for oxidative thermolysis of BiO(C<sub>7</sub>H<sub>5</sub>O<sub>3</sub>) to obtain the tetragonal modification of bismuth oxide β-Bi<sub>2</sub>O<sub>3</sub> have been determined. The processes of thermolysis of the synthesized bismuth carboxylates in an inert atmosphere and in vacuum to obtain Bi–C composites have been considered.</p>

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Synthesis of Functional Materials from Basic Bismuth(III) Nitrates

  • 期刊论文

  • 发表日期：

    2025年5月21日

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  • E. V. Timakova,
  • T. E. Timakova,
  • L. I. Afonina

摘要

Abstract

Main synthetic routes to bismuth-containing functional materials from basic bismuth nitrates with the compositions [Bi6O4(OH)4](NO3)6·H2O and [Bi6O5(OH)3](NO3)5·3H2О, which are high-purity products of hydrolytic processing of technological solutions with respect to the content of metal impurities relative to bismuth, are considered. Basic bismuth oxalate and bismuth(III) oxide salicylate with the compositions BiOH(C2O4) and BiO(C7H5O3), respectively, were obtained by treatment of basic bismuth nitrates with solutions of the corresponding carboxylic acids. The compositions of the compounds were identified by X-ray phase and chemical analyses, IR and Raman spectroscopy, and thermogravimetry. The conditions for oxidative thermolysis of BiO(C7H5O3) to obtain the tetragonal modification of bismuth oxide β-Bi2O3 have been determined. The processes of thermolysis of the synthesized bismuth carboxylates in an inert atmosphere and in vacuum to obtain Bi–C composites have been considered.