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

氧化铋/二氧化钛复合颗粒的制备及其光催化降解4-氯苯酚的性能(英文)

作　　者：徐晶晶[1,2] 陈敏东[1] 付德刚[3] 

机构地区：[1]南京信息工程大学环境科学与工程学院江苏省大气环境监测与污染控制高技术研究重点实验室,南京210044 [2]河海大学水文水资源与水利工程科学国家重点实验室,南京210098 [3]东南大学生物电子学国家重点实验室,南京210096

出　　处：《Transactions of Nonferrous Metals Society of China》2011年第2期340-345,共6页中国有色金属学报（英文版）

基　　金：Project supported by the Scientific Research Foundation of Nanjing University of Information Science and Technology, China;Project (2010490511) supported by the Open Foundation of State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, China

摘　　要：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.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。

关 键 词：bismuth oxide TITANIA PHOTOCATALYSIS 4-CHLOROPHENOL 

分 类 号：TB331[一般工业技术—材料科学与工程]