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Study on g-C3N4/BiVO4 Binary Composite Photocatalytic Materials.

Pengfei Li1, Yanqiu Hu1, Di Lu1

  • 1College of Pharmacy, Jiamusi University, Jiamusi 154007, China.

Micromachines
|March 29, 2023
PubMed
Summary

This study developed a novel graphitic carbon nitride (g-C3N4)/BiVO4 photocatalyst. The composite demonstrated high efficiency in degrading RhB, showing potential for advanced environmental remediation applications.

Keywords:
BiVO4g-C3N4photocatalytic

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Area of Science:

  • Materials Science
  • Environmental Chemistry
  • Photocatalysis

Background:

  • Semiconductor photocatalysts combined with graphitic carbon nitride (g-C3N4) show enhanced activity by reducing carrier recombination and improving adsorption.
  • Developing efficient composite photocatalysts is crucial for environmental remediation.

Purpose of the Study:

  • To synthesize and characterize g-C3N4/BiVO4 heterostructures for enhanced photocatalytic activity.
  • To investigate the photocatalytic performance of the composite for RhB degradation.

Main Methods:

  • Preparation of g-C3N4 with varied morphologies via chemical cracking.
  • Synthesis of g-C3N4/BiVO4 heterostructures using solvent evaporation.
  • Photocatalytic degradation experiments using RhB as a model pollutant.
  • Characterization using UV-Vis diffuse reflection (UV-DRS) and photoluminescence (PL) spectroscopy.

Main Results:

  • The g-C3N4/BiVO4 composite with 1% BiVO4 exhibited the highest photocatalytic activity, achieving a 90.4% degradation rate for RhB.
  • Degradation followed a quasi-primary kinetic model and remained stable over four cycles.
  • UV-DRS and PL confirmed the formation of a g-C3N4/BiVO4 binary heterojunction with a Z-type charge transfer process.

Conclusions:

  • The g-C3N4/BiVO4 heterostructure effectively enhances photocatalytic performance through efficient carrier separation.
  • This composite offers a promising strategy for developing advanced photocatalytic materials for environmental applications.
  • The Z-type charge transfer mechanism is key to the improved photocatalytic capacity.