硅酸盐学报

ZnO微晶晶面与其光催化性能的关系(英文)

作者：吴建锋张敏徐晓虹刘孟方斌正

关键词：氧化锌光催化性能晶面水热法微晶体

分类号：O643.36

出版年,卷(期):页码：2009,37(6):1038-1043

DOI：

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(CH_3COO)_2·2H_2O 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 5h and depression when the time is 10h.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 column-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.

基金项目：

国家科技支撑计划(2006BAJ02B03-03)资助项目。

作者简介：

参考文献：

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