Fabrication of Z-scheme Bi3O4Cl/g-C3N4 2D/2D heterojunctions with enhanced interfacial charge separation and photocatalytic degradation various organic pollutants activity
Fabrication of Z-scheme Bi3O4Cl/g-C3N4 2D/2D heterojunctions with enhanced interfacial charge separation and photocatalytic degradation various organic pollutants activity
复制标题
Z型Bi3O4Cl/g-C3N4 2D/2D异质结的制备，具有增强的界面电荷分离和光催化降解各种有机污染物的活性
DOI：
10.1016/j.apsusc.2018.06.038
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发表时间：
2018-10-15
影响因子：
6.7
通讯作者：
Li, Chunmei
中科院分区：
文献类型：
--
作者：
Che, Huinan;Che, Guangbo;Li, Chunmei
采用固相煅烧法制备了一种新型的Z型Bi 3 O 4Cl/g-C3 N4二维/二维异质结。Z型Bi_3O_4Cl/g-C_3 N_4 2D/2D异质结在可见光下对水中的抗生素、染料和重金属等污染物具有良好的光催化活性。光催化性能的提高归因于二维Bi 3 O 4Cl纳米片与二维g-C3 N4纳米片之间的界面相互作用，增大了比表面积，提高了光生电子-空穴对的分离效率。为了解释Z型Bi_3O_4Cl/g-C_3 N_4二维/二维异质结中Bi_3O_4Cl和g-C_3 N_4界面间的相互作用，采用透射电镜、X射线光电子能谱和N-2吸附-脱附等温线进行了研究.此外，通过理论计算、捕获实验和ESR技术，系统地研究了Z型Bi_3O_4Cl/g-C_3 N_4 2D/2D异质结的光催化机理。本工作为制备具有高效光催化活性的其它Z型二维/二维异质结提供了一种有希望的方法。
A novel Z-scheme Bi3O4Cl/g-C3N4 2D/2D heterojunctions were successfully prepared by solid phase calcination method. The Z-scheme Bi3O4Cl/g-C3N4 2D/2D heterojunctions exhibit outstanding photocatalytic activity for removing the various water contaminant under visible light, such as antibiotic, dye and heavy metal. The enhancement of phototcatalytic performance is ascribed to the interfacial interaction between 2D Bi3O4Cl nanoflakes and 2D g-C3N4 nanosheets, which can enlarge specific surface area and improve separation efficiency of photogenerated electron-hole pairs. To explain the interfacial interaction between Bi3O4Cl and g-C-3 N-4 in Z-scheme Bi3O4Cl/g-C3N4 2D/2D heterojunctions, the transmission electron microscopy, X-ray photoelectron spectroscopy and N-2 adsorption-desorption isotherms measurements were investigated. In addition, the photocatalytic mechanism over Z-scheme Bi3O4Cl/g-C3N4 2D/2D heterojunction is systematically investigated by the calculation, trapping experimental and ESR technology. The present work may provide a promising approach to fabrication of other Z-scheme 2D/2D heterojunction with efficient photocatalytic activity.