以Zn(CH$_{3}$COO)$_{2}\cdot$2H$_{2}$O和AgNO$_{3}$为原料, 丙烯酰胺为单体, N, N$^{\prime}$--亚甲基双丙烯酰胺为交联剂, 用高分子凝胶法在较低的温度下制备出纳米ZnO/Ag. 对纳米ZnO/Ag的结构和性能进行了表征, 并研究了它的光催化活性. 结果表明: 在这个方法中, 利用丙烯酰胺自由基聚合反应, 同时利用网络剂有两个活化双健的双功能团效应, 将高分子链联结起来构成网络. 高分子凝胶形成的极小且均匀的网络限制了ZnO/Ag晶粒之间的团聚. 制备出的纳米ZnO/Ag粉料颗粒为球形, 未被Ag包覆的纳米ZnO的平均粒径约15 nm, 被Ag包覆的纳米ZnO的平均粒径约45 nm. 在次甲基蓝水溶液中加入3 g/LZnO/Ag粉料后, 次甲基蓝的降解率为100\%. 沉积贵金属Ag使ZnO纳米粉料的光催化活性得到了很大提高, 且可以重复使用.
The acrylamide and N,N$^{\prime}$--methylenediacrylamide were used to make a polyacrylamide gel from an aqueous solution of zinc acetate and silver nitrate. The characterization and the photocatalytic activities of nanometer--sized ZnO/Ag were studied by XRD, FT--IR and TEM. The results showed that because of polyacrylamide network the particle of ZnO/Ag crystalline was global, the even particle diameter size of nanometer--sized ZnO un--coated by Ag was about 15 nm, and the even particle diameter size of nanometer--sized ZnO/Ag about 45 nm. The degraded rate of methylene blue was 100\% when ZnO/Ag was used, and ZnO/Ag powders can be used repeadly.
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