g-C_(3)N_(4)/BiOBr异质结对罗丹明B可见光催化活性研究

Visible Light Catalytic Activity of Flower-like g-C_(3)N_(4)/BiOBr Heterojunction

采用硝酸剥离的二维g-C_(3)N_(4)纳米片为基材,通过分散掺杂溴化钾(KBr)和五水合硝酸铋(Bi(NO_(3))_(3)·5H_(2)O),构建了花状的g-C_(3)N_(4)/BiOBr异质结,采用x射线衍射、场发射扫描电子显微镜和傅里叶变换红外光谱等研究了制备的复合光催化剂的微观结构和形态特征。该异质结对罗丹明B为代表的一系列偶氮类化合物产生光催化降解性能。良好的结果可归结于异质结的形成可以充分捕获催化剂表面的光激化电子,同时提高了光生载流电子的转移和分离效率,催化性能,稳定性以及降解率等。

Two-dimensional g-C_(3)N_(4)nanosheets exfoliated by nitric acid were used as the substrate,and the flower-like g-C_(3)N_(4)/BiOBr was constructed by dispersing and doping potassium bromide(KBr)and bismuth nitrate pentahydrate(Bi(NO_(3))_(3)·5H_(2)O)for heterojunction,X-ray diffraction,field emission scanning electron microscope and Fourier transform infrared spectroscopy were used to study the microstructure and morphological characteristics of the prepared composite photocatalyst.The heterojunction produces photocatalytic degradation performance for a series of azo compounds represented by Rhodamine B.The good results can be attributed to the formation of heterojunctions that can fully capture the photoactivated electrons on the catalyst surface,and at the same time improve the transfer and separation efficiency of photogenerated current-carrying electrons,catalytic performance,stability and degradation rate.