Rational Optimization of 2D Bi₂MoO₆ Nanopiece @ 2D g‐C₃N₄ Nanoflake Composite for Boosting Photocatalytic Performance of HER and ODR

BACKGROUND

Preparing catalysts with heterojunction structures is a strategy to achieve efficient charge separation and transfer of charges to enhance photocatalytic activity of photocatalysts. To optimize the graphitic carbon nitride (g‐C₃N₄) based photocatalysts, Bi2MoO6/@ 2D g‐C3N4 catalyst was prepared.

RESULTS

2D Bi₂MoO₆ nanopiece @ 2D g‐C₃N₄ nanoflake composites in different proportions were prepared by hydrothermal method. The prepared materials were characterized by various modern instrumental analysis, and their photocatalytic ability to decompose water and degrade rhodamine B under visible light irradiation was tested. Compared with pure Bi₂MoO₆ nanopiece and g‐C₃N₄ nanoflake, the hydrogen evolution rate (HER) of Bi₂MoO₆ nanopiece @ g‐C₃N₄ nanoflake (1:10) composite was the highest, which was 4847 μmol‧h⁻¹‧g⁻¹. While the composite (3:10) exhibits significantly enhanced photocatalytic rhodamine B degradation for organic dye removal (ODR) due to the formation of the excellent heterojunction to improve the separation and migration efficiency of photogenerated carriers.

CONCLUSION

O²⁻ and ·OH were the two main active species in the photocatalytic degradation of RhB. Bi₂MoO₆ formed a heterojunction with g‐C₃N₄, which accelerated the separation and migration efficiency, thereby enhancing the photocatalytic activity.

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