气凝胶光催化剂的研究进展

Research progress on aerogel photocatalyst

有机污染物的光催化降解得到多方面的注意,但往往侧重于粉体或薄膜催化剂的制备和使用,而对于气凝胶光催化剂的关注甚少。最近的研究表明,TiO2、TiO2-SiO2和CuO等气凝胶在光催化降解水杨酸、CN-、苯酚和硝基苯酚时表现出很高的活性,其降解效果比TiO2粉末、CuO粉末和Cu2O粉末等好得多,比H2O2、KMnO4、K2Cr2O7等常用氧化剂更为优越。作者对TiO2、TiO2-SiO2和CuO气凝胶的研究进行综述,探讨气凝胶作为光催化剂的应用前景。

Aerogel is a special kind of mesoporous materials with high porosity,large specific surface area and excellent transparency.Recently,TiO_2,TiO_2-SiO_2,CuO aerogels have attracted many researchers' attention due to their outstanding photocatalytic activity.They have been proved more active than H_2O_2,KMnO4 or TiO_2 powder to photodegrade salicylic,phenol,cyanide and nitrophenols.The preparation and photocatalytic application of TiO_2,TiO_2-SiO_2,CuO aerogels are reviewed,and the prospects of aerogels used as photocatalyst are discussed.