采用水热合成法制备ZnO微米花状粉体,利用聚乙烯吡咯烷酮(PVP)作为还原剂和分散剂,在ZnO微米花状粉体表面还原不同浓度的银氨溶液,获得花状的Ag/ZnO复合物.通过X射线衍射(XRD)、扫描电子显微镜(SEM)以及透射电镜(TEM)对它们的物性结构和晶粒形貌进行了表征,显示Ag纳米晶分散地附着在ZnO的表面.对亚甲基蓝溶液进行紫外光催化降解实验,结果表明该复合物具有很高的光催化活性.%Using the polyvinylpyrrolidone as a reducing agent and dispersant, flower-like ZnO/Ag composite is prepared based on surface of flower-like ZnO prepared by hydrothermal method in different concentrations of silver ammonia solution. The phase structures and surface physicochemical properties were well-characterized via X-ray diffraction(XRD) patterns, nitrogen adsorption determination, scanning electron microscope with energy dispersive spectrometer (SEM) and transmission electron microcopy(TEM). The composite were tested by the UV-light photodegradation of methylene blue (MB). The results indicate that Ag can load effectively on ZnO surface, and the Ag/ZnO composite was the typical hexagonal wurtzite structure, the composites exhibited higher photocatavtic activities under the UV-light irradition.
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