ZnO微晶晶面与其光催化性能的关系(英文)  

CRYSTAL PLANES OF ZnO CRYSTALLITE AND ITS PHOTOCATALYTIC PROPERTY

作　　者：吴建锋[1] 张敏[1] 徐晓虹[1] 刘孟[1] 方斌正[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070

出　　处：《硅酸盐学报》2009年第6期1038-1043,共6页Journal of The Chinese Ceramic Society

基　　金：国家科技支撑计划(2006BAJ02B03-03)资助项目。

摘　　要：以Zn(CH_3COO)_2·2H_2O和NaOH为原料,采用水热法制备ZnO微晶。通过改变水热反应时间制得了2种(0001)晶面显露情况不同的六方短柱状ZnO微晶。反应5 h时,得到(0001)晶面平滑完整的晶体;10 h时,(0001)晶面被腐蚀凹陷。使用X射线衍射仪、扫描电镜分析物相组成和晶体显微形貌,并测试2种ZnO微晶的紫外光催化降解亚甲基蓝性能。结果直接证明:(0001)晶面对ZnO六方短柱状微晶光催化活性的高低起决定性作用,当(0001)晶面被溶蚀时,ZnO微晶无光催化降解性。Zinc oxide （ZnO） crystallite was synthesized by the hydrothermal method, with Zn（CH3COO）2·2H2O and NaOH employed as raw materials. Two kinds of hexagonal column-like ZnO crystals with different exposure of （0001） crystal plane were prepared by changing the hydrothermal treatment time. （0001） crystal surfaces present smoothness and integrity when the holding time is 5 h and depression when the time is 10 h. The phase composition and microstructures of the as-synthesized samples were studied by the X-ray diffraction and scanning electron microscope. Ultraviolet-induced photocatalytic degradation of methylene blue was investigated using two samples as photocatalysts. The results directly prove that the （0001） crystal plane of hexagonal colunm-like ZnO crystallite plays a decisive role in the performance of photocatalytic activity. The ZnO crystallite has no photodegradation when its （0001） crystal plane has been dissolved.

关 键 词：氧化锌 光催化性能 晶面 水热法 微晶体 

分 类 号：O74[理学—晶体学]