摘要：

为提高石墨相氮化碳（g-C₃N₄）的光催化性能，采用3D花状ZIF-Co与g-C₃N₄混合热处理的方法制备了3D花状Co₃O₄/g-C₃N₄复合光催化剂，并将其用于光催化降解罗丹明B模拟染料废水。结果表明：当ZIF-Co与g-C₃N₄的质量比为5%时，制备的Co₃O₄/g-C₃N₄的光催化性能最佳，在可见光下照射30 min，其对罗丹明B的降解率可达90%以上，且该催化剂的重复稳定性好。在降解罗丹明B的过程中活性基团的作用顺序为·O₂^- > h⁺ > ·OH。

关键词: 石墨相氮化碳, 四氧化三钴, 3D花状结构, 光催化, 罗丹明B

Abstract:

To further improve the photocatalytic activity of g-C₃N₄, 3D flower-like Co₃O₄/g-C₃N₄ were prepared via calcining the mixture of 3D flower-like ZIF-Co and g-C₃N₄. The prepared composite photocatalyst was used for the degradation of Rhodamine B(RhB) simulated wastewater. The results showed that above 90% of RhB can be removed in 30 min under visible light irradiation by the Co₃O₄/g-C₃N₄, when the mass ratio of ZIF-Co to g-C₃N₄ was 5%, which exhibited the best photocatalytic performance. In addition, the catalysts showed good stability. Besides, the role of radicals in RhB degradation followed the sequence:·O₂^- > h⁺ > ·OH.

Key words: g-C₃N₄, Co₃O₄, 3D flower-like structure, photocatalysis, RhB

中图分类号: 

• X703