全无机卤化钙钛矿复合光催化剂的可见光催化性能研究

Visible-light photocatalytic activity of all inorganic halogenated perovskite composite

全无机卤化钙钛矿CsPbX3(X=I,Br,Cl)近年来引起了越来越多的关注,并由于其优异的光电性能而被广泛用于太阳能电池和发光二极管。将全无机卤化钙钛矿应用于有机污染物的光催化降解领域,通过重结晶法在室温下合成高纯度的Au-CsPbBr3@GO复合光催化剂,进一步降低了钙钛矿型复合光催化剂的制备成本。Au-CsPbBr3@GO复合光催化剂用于降解水中不溶性致癌物质苏丹红Ⅲ,表现出优异的可见光催化性能。结果表明:在可见光的作用下,15mg复合光催化剂在60min内降解了60%的苏丹红Ⅲ,并且在200min内的降解率达到了80%,空穴和羟基自由基是可见光催化降解苏丹红Ⅲ的主要活性物种。

The all-inorganic halogenated perovskite CsPbX3(X=I,Br,Cl)has attracted more and more attention in recent years and is widely used in solar cells and light-emitting diodes due to its excellent photoelectric properties.All-inorganic halogenated perovskites were used in the field of photocatalytic degradation of organic pollutants.The high-purity Au-CsPbBr3@GO composite photocatalyst was synthesized by recrystallization at room temperature,which further reduced the preparation cost of the photocatalyst.Au-CsPbBr3@GO was used to degrade the water-insoluble carcinogen sudan redⅢ,and exhibitd excellent visible light catalytic performance.The results shown that under the action of visible light,15mg of the photocatalyst degraded about 60%of sudan redⅢin 60 minutes,and the degradation rate reached 80%in 200minutes.The holes and hydroxyl radicals were the main active species of visible light catalytic degradation of sudan redⅢ.