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<p>Silicon carbide (SiC) has garnered significant attention in the field of photocatalytic hydrogen (H<sub>2</sub>) production due to its tunable band gap, exceptional chemical stability, and environmental friendliness. However, commercial SiC (SiC-C) has high electron–hole recombination rates and low specific surface area, which limits its application in this field. In this study, SiC nanosheets (SiC-P) with high specific surface area were prepared using graphene oxide (GO) aerogel as both template and carbon source via high-temperature vapor–solid reaction. Subsequently, xCo<sub>3</sub>O<sub>4</sub>/SiC-P composite nanosheets were synthesized through in-situ wet-impregnation method, and the effects of Co<sub>3</sub>O<sub>4</sub> loading on the composite structure and photoelectric properties were systematically investigated. XRD, SEM, and other characterizations confirm that the GO aerogel induced SiC-P nanosheets maintain their sheet-like morphology; the incorporation of Co<sub>3</sub>O<sub>4</sub> further constructed well-contacted xCo<sub>3</sub>O<sub>4</sub>/SiC-P heterojunctions, and gave the composite structure a wider light absorption range and lower carrier recombination rate. The optimal sample of 7Co<sub>3</sub>O<sub>4</sub>/SiC-P exhibited a photocatalytic H<sub>2</sub> evolution rate of 345.02&#xa0;μmol∙h<sup>−1</sup>∙g<sup>−1</sup>, which was about 1.67 times and 8.74 times higher than that of the SiC-P nanosheets and SiC-C particles, respectively. This work provides a new strategy for the design of high-performance SiC-based photocatalytic materials.</p>

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GO aerogel induced growth of Co3O4/SiC composite nanosheets for photocatalytic hydrogen production

  • 期刊论文

  • 发表日期：

    2026年1月5日

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  • Haoyu Yuan,
  • Yue Shen,
  • Wenxiao Zhang,
  • Long Zhang,
  • Feng Gu,
  • Linjun Wang

摘要

Silicon carbide (SiC) has garnered significant attention in the field of photocatalytic hydrogen (H2) production due to its tunable band gap, exceptional chemical stability, and environmental friendliness. However, commercial SiC (SiC-C) has high electron–hole recombination rates and low specific surface area, which limits its application in this field. In this study, SiC nanosheets (SiC-P) with high specific surface area were prepared using graphene oxide (GO) aerogel as both template and carbon source via high-temperature vapor–solid reaction. Subsequently, xCo3O4/SiC-P composite nanosheets were synthesized through in-situ wet-impregnation method, and the effects of Co3O4 loading on the composite structure and photoelectric properties were systematically investigated. XRD, SEM, and other characterizations confirm that the GO aerogel induced SiC-P nanosheets maintain their sheet-like morphology; the incorporation of Co3O4 further constructed well-contacted xCo3O4/SiC-P heterojunctions, and gave the composite structure a wider light absorption range and lower carrier recombination rate. The optimal sample of 7Co3O4/SiC-P exhibited a photocatalytic H2 evolution rate of 345.02 μmol∙h−1∙g−1, which was about 1.67 times and 8.74 times higher than that of the SiC-P nanosheets and SiC-C particles, respectively. This work provides a new strategy for the design of high-performance SiC-based photocatalytic materials.