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<p>Solar-driven photocatalytic materials possess the capability of directly converting solar energy into chemical energy, which offer a facile and efficient method to decompose surface pollutants on building materials. In this study, g-C<sub>3</sub>N<sub>4</sub>/MoS<sub>2</sub> heterojunction photocatalysts with various doping amounts of MoS<sub>2</sub> were synthesized using hydrothermal strategy and low-temperature calcination. The morphology and structure of the samples were characterized by XRD, FTIR, SEM, and other analytical techniques. The results indicate that the MoS<sub>2</sub> doping leads to an increase in surface defects and irregular pores in g-C<sub>3</sub>N<sub>4</sub>, thereby enhancing the absorption of visible light and the overall catalytic activity of the catalyst. Under visible light, Rhodamine B solution was used as the target pollutant to study its photocatalytic performance. The results demonstrate that g-C<sub>3</sub>N<sub>4</sub>/MoS<sub>2</sub> exhibits good catalytic and cycling performance when the MoS<sub>2</sub> content was 12&#xa0;mg. Besides, the designed photocatalytic materials (g-C<sub>3</sub>N<sub>4</sub>/MoS<sub>2</sub>) are found to present the ability of catalyzing Rhodamine B degradation when added into self-compacting concrete. Noteworthily, the photocatalysts introduction results in the increased compressive strength of the concrete in the early stage but decreased strength in the later stage. The design of g-C<sub>3</sub>N<sub>4</sub>/MoS<sub>2</sub> affords a new direction of self-cleaning environmental protection building materials, exposing great potentials to their practical applications.</p>

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Applications of g-C3N4/MoS2 heterojunction photocatalyst in self-compacting concrete

  • 期刊论文

  • 发表日期：

    2025年6月18日

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  • Chunhua Gao,
  • Yifei Sima,
  • Mingyang Wang

摘要

Solar-driven photocatalytic materials possess the capability of directly converting solar energy into chemical energy, which offer a facile and efficient method to decompose surface pollutants on building materials. In this study, g-C3N4/MoS2 heterojunction photocatalysts with various doping amounts of MoS2 were synthesized using hydrothermal strategy and low-temperature calcination. The morphology and structure of the samples were characterized by XRD, FTIR, SEM, and other analytical techniques. The results indicate that the MoS2 doping leads to an increase in surface defects and irregular pores in g-C3N4, thereby enhancing the absorption of visible light and the overall catalytic activity of the catalyst. Under visible light, Rhodamine B solution was used as the target pollutant to study its photocatalytic performance. The results demonstrate that g-C3N4/MoS2 exhibits good catalytic and cycling performance when the MoS2 content was 12 mg. Besides, the designed photocatalytic materials (g-C3N4/MoS2) are found to present the ability of catalyzing Rhodamine B degradation when added into self-compacting concrete. Noteworthily, the photocatalysts introduction results in the increased compressive strength of the concrete in the early stage but decreased strength in the later stage. The design of g-C3N4/MoS2 affords a new direction of self-cleaning environmental protection building materials, exposing great potentials to their practical applications.