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Abstract <p>The effect of liquid-phase oxidation of porous carbon composite material (PCCM) with nitric acid on its structural and physicochemical characteristics has been investigated. As shown by low-temperature nitrogen adsorption, the oxidation of PCCM with 50 wt.% nitric acid results in a 2-fold decrease in the volume of pores with sizes 4–20 nm and a 1.5-fold increase in the volume of larger pores (20–50 and 50–130&#xa0;nm). It is shown by Raman spectroscopy that the oxidation of PCCM results in a 6.5-fold decrease in the <i>I</i><sub>D1</sub>/<i>I</i><sub>G</sub> and <i>I</i><sub>D3</sub>/<i>I</i><sub>G</sub> ratios, indicating structure ordering and removal of amorphous carbon. Furthermore, the oxidation of PCCM leads to a reduction in the crushing strength of single granules to <i>ca</i>. 80 kg/cm<sup>2</sup>, representing a 28% decrease compared to the original PCCM.</p>

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Oxidation of Porous Carbon Composite Material with Nitric Acid

  • 期刊论文

  • 发表日期：

    2026年2月1日

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  • O. A. Knyazheva,
  • A. V. Lavrenov,
  • O. A. Kokhanovskaya,
  • O. V. Gorbunova,
  • R. M. Mironenko,
  • I. V. Rezanov,
  • I. V. Muromtsev,
  • A. B. Arbuzov

摘要

Abstract

The effect of liquid-phase oxidation of porous carbon composite material (PCCM) with nitric acid on its structural and physicochemical characteristics has been investigated. As shown by low-temperature nitrogen adsorption, the oxidation of PCCM with 50 wt.% nitric acid results in a 2-fold decrease in the volume of pores with sizes 4–20 nm and a 1.5-fold increase in the volume of larger pores (20–50 and 50–130 nm). It is shown by Raman spectroscopy that the oxidation of PCCM results in a 6.5-fold decrease in the ID1/IG and ID3/IG ratios, indicating structure ordering and removal of amorphous carbon. Furthermore, the oxidation of PCCM leads to a reduction in the crushing strength of single granules to ca. 80 kg/cm2, representing a 28% decrease compared to the original PCCM.