ZnO/mpg-C3N4复合光催化剂的制备及其可见光催化性能

采用简单溶剂热法成功合成了具有高可见光催化活性的ZnO/mpg-C₃N₄复合光催化剂。利用XRD、TEM、FT-IR、UV-Vis等手段对样品的结构、形貌及光学性能进行了表征，并以亚甲基蓝(MB)作为目标污染物，对ZnO/mpg-C₃N₄进行了光催化降解评价实验。结果表明，采用溶剂热法合成的ZnO/mpg-C₃N₄复合光催化剂中，ZnO颗粒较均匀地分散在mpg-C₃N₄上，与纯ZnO及mpg-C₃N₄相比，可见光催化活性明显提高。当mpg-C₃N₄质量分数为80%时，ZnO/mpg-C₃N₄复合光催化剂的光催化活性最高，为纯mpg-C₃N₄的2.3倍。

Preparation and Photocatalytic Acitvity of ZnO/mpg-C3N4 Composite Photocatalyst

ZnO/mpg-C₃N₄ composite photocatalyst with high visible light activity was successfully synthesized by solvothermal method, and characterized by XRD, TEM, FT-IR and UV-Vis. Methylene blue (MB) was used as the model substance to evaluate the photocatalytic activity of the ZnO/mpg-C₃N₄ composite photocatalyst. The results indicated that ZnO particles dispersed uniformly on the mpg-C₃N₄ sheet, and ZnO/mpg-C₃N₄ composite photocatalyst exhibited much higher photocatalytic activity than the pure mpg-C₃N₄ and ZnO. When mpg-C₃N₄ mass fraction was 80% in ZnO/mpg-C₃N₄ the composite photocatalyst possessed the highest visible light photocatalytic activity, which was almost 23 times as high as that of pure mpg-C₃N₄.