纳米氧化锡(SnO2)粉体是制备气、湿敏传感器和催化剂等较为理想的原料.利用有机单体自由基聚合反应机制, 采用聚合物网络法制备了纳米氧化锡粉体.以五水氯化锡为原料, 选取丙烯酰胺和N, N′-亚甲基双丙烯酰胺两种水溶性有机物作为单体, 在引发剂过硫酸铵的作用下, 有机单体发生交联共聚, 从而使Sn4+溶液转变成凝胶.该凝胶具有三维网络状结构, 能够较好地抑制热处理过程中粒子的团聚, 500 ℃下热处理2 h获得的SnO2粉体具有金红石结构, 平均粒径约为7.9 nm.
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