采用原位无序工程提高Bi_(5)O_(7)Br的可见光光催化药物降解和析氢性能  

Enhancement of visible light photocatalytic pharmaceutical degradation and hydrogen evolution of Bi_(5)O_(7)Br by in situ disorder engineering

作　　者：谢芳霞 张璐璐 张潇[1] 张媚 简选 刘建新 张小超[2] 王雅文[2] 李瑞 樊彩梅[1,2] Fang-xia XIE;Lu-lu ZHANG;Xiao ZHANG;Mei ZHANG;Xuan JIAN;Jian-xin LIU;Xiao-chao ZHANG;Ya-wen WANG;Rui LI;Cai-mei FAN(College of Environmental Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China;College of Chemical Engineering and Technology,Taiyuan University of Technology,Taiyuan 030024,China;Shaanxi Key Laboratory of Chemical Reaction Engineering,College of Chemistry and Chemical Engineering,Yan’an University,Yan’an 716000,China)

机构地区：[1]太原理工大学环境科学与工程学院,太原030024 [2]太原理工大学化学工程与技术学院,太原030024 [3]延安大学化学化工学院陕西省化学反应工程重点实验室,延安716000

出　　处：《Transactions of Nonferrous Metals Society of China》2023年第6期1862-1872,共11页中国有色金属学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.22008167,21978187,21978196);the Natural Science Foundation for Young Scientists of Shanxi Province,China(Nos.201901D211100,201901D211058,201901D211027)。

摘　　要：为了同时解决光吸收能力弱和光生载流子复合率高的问题,本文作者通过简单的原位无序工程合成具有丰富有序/无序结构的Bi_(5)O_(7)Br(O/D-Bi_(5)O_(7)Br)光催化剂。采用XRD、TEM、HRTEM、SAED、XPS和UV-Vis DRS对所制备的样品进行表征,并通过可见光催化降解盐酸四环素(TC)和光解水析氢评价其光催化活性。结果表明,有序/无序结构不仅增强了Bi_(5)O_(7)Br的光吸收能力,提高了其导带位置,促进了光生载流子的转移和分离,而且为光催化过程提供了丰富的不饱和原子作为反应活性位点。因此,O/D-Bi_(5)O_(7)Br表现出38.12μmol/(g·h)的高析氢率和在135 min内86%的TC降解率。In order to simultaneously solve the problems of the poor light absorption capacity and high recombination rate of photogenerated carriers,Bi_(5)O_(7)Br photocatalyst with abundant ordered/disordered structures(O/D-Bi_(5)O_(7)Br)was prepared through a simple in situ disorder engineering.The prepared samples were characterized by XRD,TEM,HRTEM,SAED,XPS,UV-Vis diffuse reflectance spectra(DRS),and the activity was evaluated by photocatalytic degradation of tetracycline hydrochloride(TC)and hydrogen evolution under visible light irradiation.Results revealed that the ordered/disordered structure not only enhances the light absorption ability,uplifts conduction band position,facilitates the transfer and separation of photogenerated carriers,but also offers abundant unsaturated atoms as active sites for the photocatalytic process.Therefore,O/D-Bi_(5)O_(7)Br exhibits a high hydrogen evolution rate of 38.12μmol/(g‧h)and superior TC degradation rate of 86%within 135 min.

关 键 词：Bi_(5)O_(7)Br 无序工程 药物降解 析氢 可见光 

分 类 号：X703[环境科学与工程—环境工程] TQ116.2[化学工程—无机化工] TQ426