Fabrication of a three-dimensional BiOBr/BiOI photocatalyst with enhanced visible light photocatalytic performance
Fabrication of a three-dimensional BiOBr/BiOI photocatalyst with enhanced visible light photocatalytic performance
复制标题
DOI：
10.1016/j.ceramint.2014.03.039
复制
发表时间：
2014-09-01
影响因子：
5.2
通讯作者：
Chen, Donghui
中科院分区：
文献类型：
--
作者：
Lin, Li;Huang, Manhong;Chen, Donghui
采用简单的一锅溶剂热法成功合成了三维（3D） BiOBr/BiOI分级微球光催化剂。采用x射线衍射（XRD）、扫描电镜（SEM）、能谱分析（EDS）、紫外-可见漫反射光谱（UV-vis- drs）和N-2吸附脱附等温线对制备的样品进行了表征。通过在可见光（λ > 420 nm）下光催化降解罗丹明B （RhB）和四环素（TC）来评价其光催化活性。50% BiOBr/BiOI复合材料对RhB和TC的光催化去除率高于10%和90% BiOBr/BiOI复合材料。当催化剂用量为0.4 g/L的50% BiOBr/BiOI时，RhB （C-0=15 mg/L）在40 min内完全降解，TC （C-0=40 mg/L）在50 min内降解率超过83%。50:50复合材料的光催化活性增强是由于光生成载流子的有效分离以及可见光吸收增强和价带（VB）边电位降低之间的平衡。(C) 2014 Elsevier Ltd and Techna Group S.r.l版权所有
Three-dimensional (3D) BiOBr/BiOI hierarchical microsphere photocatalysts were successfully synthesized via a facile one-pot solvothermal method. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), UV-vis diffuse reflectance spectroscopy (UV-vis-DRS) and N-2 adsorption desorption isotherms. The photocatalytic activity was evaluated by the photocatalytic degradation of Rhodamine B (RhB) and tetracycline (TC) under visible light irradiation (lambda > 420 nm). The 50% BiOBr/BiOI composite showed a higher photocatalytic removal efficiency of RhB and TC than 10% and 90% BiOBr/BiOI composites. RhB (C-0=15 mg/L) was degraded completely within 40 min and over 83% of TC (C-0=40 mg/L) was degraded within 50 min using a catalyst quantity of 0.4 g/L of 50% BiOBr/BiOI. The enhanced photocatalytic activity of the 50:50 composite was attributed to effective separation of photogenerated carriers and the balance between enhanced visible light absorption and decreased valence band (VB) edge potential. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.