Preparation of bismuth oxide/titania composite particles and their photocatalytic activity to degradation of 4-chlorophenol

来源期刊：中国有色金属学报(英文版)2011年第2期

论文作者：徐晶晶 陈敏东 付德刚

文章页码：340 - 345

关键词：氧化铋; 二氧化钛; 光催化; 4-氯苯酚

Key words：bismuth oxide; titania; photocatalysis; 4-chlorophenol

摘    要：在低温条件下制备在太阳光照射下具有高光催化活性的氧化铋/二氧化钛复合颗粒。并利用XRD、SEM、BET、XPS和DRS对其进行表征。结果表明：将二氧化钛纳米颗粒沉积在氧化铋表面可形成微？纳结构，使该复合材料表现出多孔性，并提高表面羟基的含量。因此，在太阳光的激发下，氧化铋/二氧化钛复合颗粒对4-氯苯酚的催化降解能力高于纯二氧化钛和P25。

Abstract: Bismuth oxide/titania, one interfacial composite semiconductor with high photocatalytic activity under solar light, was prepared at low temperature. The structure was characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), brunauer-emmett-teller (BET), X-ray photoelectron spectroscopy (XPS) and diffuse reflection spectra (DRS). The results indicate that deposited titania nanoparticles on bismuth oxide surface have micro-nano structure, and this composite material exhibits porosity and increased surface hydroxyl groups. Furthermore, the as-prepared photocatalyst shows higher photocatalytic activity to the degradation of 4-chlorophenol than pure titania or P25 under sunlight.