【摘要】 以Zn(CH3COO)2·2H2O和AgNO3为原料,丙烯酰胺为单体,N,N′-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3g/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.更多还原

【Abstract】 The acrylamide and N,N′-methylenediacrylamide were used to make a polyacrylamide gel from an aqueous solution of zinc acetate and silver nitrate. The characterization and the photo-catalytic activities of nanometer-sized ZnO/Ag were studied by XRD, FT-lR 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.更多还原