Preparation and photocatalytic performance of Ag/ZnO nano-composites
Preparation and photocatalytic performance of Ag/ZnO nano-composites
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DOI：
10.1016/j.mssp.2007.05.003
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发表时间：
2007-04
影响因子：
4.1
通讯作者：
Guang Zhou;J. Deng
中科院分区：
文献类型：
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作者：
Guang Zhou;J. Deng
采用配位均匀共沉淀法制备了粒径在20 ~ 50 nm的Ag/ZnO纳米复合材料。采用热重/差热分析（TG-DTA）、红外光谱（FT-IR）、X射线衍射（XRD）、透射电子显微镜（TEM）和紫外-可见光谱（UV-vis）对前驱体和不同温度下产物的微观结构和形貌进行了表征。对产物Ag/ZnO的生长动力学研究表明，在300-600°C温度范围内，Ag/ZnO的动态生长指数为1.32，晶粒生长速度较快。光催化降解水溶液中的甲基橙子（MO）的结果表明，配位均匀共沉淀法制备的Ag/ZnO光催化剂比光还原法制备的催化剂具有更好的光催化性能，尤其是300°C焙烧的催化剂，随着焙烧温度从300 ° C升高到700°C，光催化性能下降。
Ag/ZnO nano-composites sized between 20 and 50nm were prepared by the coordination homogeneous co-precipitation method. Thermogravimetry/differential thermal analysis (TG-DTA), Fourier transform infrared (FT-IR), X-ray diffraction (XRD), transmission electron microscopy (TEM) and ultraviolet–visible (UV–vis) were used to characterize the microstructure and morphology of the precursor and the products obtained at various temperatures. The research on the growth dynamics of product Ag/ZnO showed that the dynamic growth index was 1.32, indicating that the rate of the grain growth was quick at 300–600°C. The results of the photocatalytic degradation of methyl orange (MO) in aqueous solution indicated that the Ag/ZnO photocatalyst prepared by the coordination homogeneous co-precipitation method exhibited better photocatalytic performance than that prepared by the photoreduction method, especially the photocatalyst calcined at 300°C, and the photocatalytic performance decreased when the calcining temperature increased from 300 to 700°C.