高活性BiOI/g-C<sub>3</sub>N<sub>4</sub>光催化剂的合成及性能提高机制

doi:10.11896/cldb.23010115

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Abstract The synthesis of stable and efficient photocatalysts is the key of photocatalysis technology. Thiswork uses the situ deposition method to construct diverse mass ratio BiOI/CNx series of composite materials, which composited with BiOI doesn't influence the crystal structure of g-C₃N₄. In addition, the crystal form BiOI from composite products is closely adhered to the surface of lamellar g-C₃N₄. The introduction of BiOI obviously decreases band gap and availably increases the absorption of visible light. Meanwhile, the service life of photoproduction electron-holes gradually strengthens with the compound quantity of BiOI increasing. BiOI/CN15 has the strongest adsorption capacity and photocatalytic activity for RhB. Therefore, the absorption rate of g-C₃N₄ reached 55.15% under dark reaction for 30 minutes, which is 2.68 times than g-C₃N₄ in the same condition. The degradation rate of g-C₃N₄ was 87.69% at 10 minutes of photodegradation, which is 1.9 times than g-C₃N₄ in the same condition. The catalytic reaction rate constant is 5.551×10^-2 min^-1. And the degradation rate only decreased by 4.5% after five recycles, which owns good stability of photocatalyst. The combination of BiOI and g-C₃N₄ is beneficial to the effective separation of photogenic electron-holes pairs and the rapid transfer of electrons between interfaces. In the degradation of RhB by BiOI/CN15 composite photocatalyst, h⁺ and ·O₂^- are the main active substances.

Key words： graphite phase carbon nitride bismuth iodide oxide in-situ deposition photocatalytic activity lifetime dynamics

Published: Online: 2024-06-25

CLC number:

X592

Fund:Natural Science Foundation of Inner Mongolia Autonomous Region (2020MS02025).

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	Articles by authors
	ZHU Jie
	LING Min
	MA Rundong
	WANG Ruifen
	AN Shengli

Cite this article:

ZHU Jie,LING Min,MA Rundong, et al. Synthesis and Performance Enhancement Mechanis of BiOI/g-C₃N₄ Photocatalyst with High Activity[J]. Materials Reports, 2024, 38(11): 23010115-7.

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http://www.mater-rep.com/EN/10.11896/cldb.23010115 OR http://www.mater-rep.com/EN/Y2024/V38/I11/23010115

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