钴掺杂的ZnO粉体制备及其光催化性能研究  

Synthesis and Characterization of Co-doped ZnO Powder and Its Photocatalytic Activity

作　　者：艾建平[1] 周涛[1] 汪细平[1] 陈智琴[1] 佘义[1] 姜佳丽[1] 陈江[1] 李文魁[1] AI Jianping;ZHOU Tao;WANG Xiping;CHEN Zhiqin;SHE Yi;JIANG Jiali;CHEN Jiang;LI Wenkui(Jiangxi Key Laboratory of Surface Engineering, Jiangxi Science and Technology Normal University,Nanchang 330038, Jiangxi, China)

机构地区：[1]江西科技师范大学江西省材料表面工程重点实验室,江西南昌330038

出　　处：《陶瓷学报》2017年第4期548-552,共5页Journal of Ceramics

基　　金：江西科技师范大学博士科研启动基金资助(项目号3000990340);江西省自然科学基金资助(项目号20151BAB204009)

摘　　要：以Zn(NO_3)_2·6H_2O、Co(NO_3)_2·6H_2O、NaOH为原料,采用水热法合成具有高结晶性、形貌均一的Co-ZnO粉体。通过调控钴的掺杂量制备了不同结构和形貌的ZnO光催化剂,研究合成工艺对粉体的形貌影响规律。利用X射线衍射(XRD)、扫描电子显微镜(SEM)、紫外-可见漫反射(DRS)和荧光光谱仪等手段对样品进行表征。结果表明,随着Co掺入量的增加ZnO的晶型结构并未改变,但粉体的结晶程度和形貌变化明显。用紫外灯作为灯源考察了ZnO和Co掺杂的ZnO对甲基橙的光催化降解性能,其中掺杂钴2.5%(摩尔比)的ZnO具有较好的光催化效果(3 h达89.8%),并分析Co掺入后对光催化活性影响的机理。Highly crystalline monodisperse Co-doped ZnO nanostructures were prepared by hydrothermal method using Zn(NO3)2.6H2O,Co(NO3)2?6H2O,NaOH as reactants.The as-prepared samples were well-determined by X-ray diffraction(XRD),scanning electronmicroscope(SEM),UV-Vis diffuse reflectance spectroscope(DRS)and photoluminescence measurements.The results indicated Co dopanthad significant influence on the phase structures and morphologies.And the shape evolution of ZnO nanostructures were also investigatedby adjusting the Co dopant.The crystal structures of ZnO are no change with the increasing of Co dopant.However,the intensity ofthe diffraction peaks becomes weaker and the half peak width becomes wider with the incease of the Co2+doping concentration.Thephotocatalytic performance of different Co-doped ZnO samples were studied using an ultraviolet lamp as illumination device and methylorange(MO)as stimulant pollutant.It is found that2.5%Co-doped ZnO nanoflowers exhibited the best photocatalytic activity(3h,89.8%).The mechanism of enhanced photocatalytic activity is also discussed.

关 键 词：水热合成 氧化锌 光催化活性 甲基橙 制备 

分 类 号：TQ174.75[化学工程—陶瓷工业]