Co^2+掺杂对Zn4B6O13光催化降解四环素性能影响的研究  

Effect of Co^2+doping on photocatalytic degradation of tetracycline by Zn4B6O13

作　　者：刁悦 曾寒露 何星 田晓芳 胡颖 杨顶峰 李园园 DIAO Yue;ZENG Han-lu;HE Xing;TIAN Xiao-fang;HU Ying;YANG Ding-feng;LI Yuan-yuan(College of Biological and Chemical Engineering,Chongqing University of Education,Chongqing 400067,China;Henan Academy of Agricultural Sciences,Zhengzhou 450002,China;College of Biological and Chemical Engineering,Chongqing University of Technology,Chongqing 400054,China)

机构地区：[1]重庆第二师范学院生物与化学工程学院,重庆400067 [2]河南省农业科学院,河南郑州450002 [3]重庆理工大学化学化工学院,重庆400054

出　　处：《化学研究与应用》2020年第11期2073-2079,共7页Chemical Research and Application

基　　金：重庆市教委科学技术研究项目(KJQN201801135)资助;重庆第二师范学院博士启动基金项目(2017BSRC001)资助;重庆第二师范大学生科研项目(KY20190145)资助。

摘　　要：采用固相烧结法,以ZnO、CoO、H3BO3为原料,制备Co^2+掺杂光催化样品Zn4-xCoxB6O13(x=0,0.2,0.4)并将其用于光催化降解四环素溶液研究。多晶X射线衍射表明,所制备样品为纯相,且其晶格参数随着Co^2+掺杂量的增加而呈现下降趋势。光催化实验结果表明,Co^2+掺杂显著改善了样品的光催化性能,随着Co^2+掺杂量的增多,光催化降解四环素性能逐渐提高。当掺杂Co^2+掺杂量为10%时,其在紫外光照射2 h下,光催化降解效率为50%。理论计算表明,掺杂后光催化性能的提升源自于在Zn4B6O13禁带中形成了Co-O键能级,从而增强了体系的光吸收能力。为优化提升光催化剂效率提供了借鉴和指导。Solid state sintering method was used to prepare Co^2+doped photocatalytic samples Zn4-xCoxB6O13(x=0,0.2,0.4)from ZnO,CoO and H3BO3 as raw materials and to study the photocatalytic degradation of tetracycline solution.Polycrystalline X-ray diffraction shows that the samples are pure phase,and the lattice parameters show a decreasing trend with the increase of the doping amount of Co^2+.The results of photocatalytic experiments showed that the photocatalytic performance of samples was significantly improved by Co^2+doping,and the photocatalytic degradation of tetracycline was gradually improved with the increase of Co^2+doping.When the doping amount of Co^2+doping was 10%,the photocatalytic degradation efficiency was 50%under 2h of ultraviolet irradiation.Theoretical calculation shows that the improvement of photocatalytic performance after doping is due to the formation of Co-O bond level in Zn4B6O13 band gap,thus enhancing the light absorption capacity of the system.It provides reference and guidance for optimizing the efficiency of photocatalyst.

关 键 词：CO^2+ Zn4B6O13 离子掺杂 光催化 

分 类 号：O614.8[理学—无机化学]