纳米氧化铋气-固复相光催化剂的制备、表征与光催化活性  

Preparation, characterization and photocatalytic activity of gas-solid heterogeneity photocatalyst of Bi_2O_3 nanoparticles

作　　者：丁鹏[1] 杜尧国[1] 徐自力[1] 

机构地区：[1]吉林大学环境与资源学院

出　　处：《吉林大学学报（理学版）》2004年第2期269-272,共4页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:20277015).

摘　　要：采用多元醇介质法和氨水沉淀法制备了Bi2O3半导体纳米粒子光催化剂,运用XRD,BET和XPS等手段对其进行表征,以甲苯的气相光催化氧化为探针反应,考察了不同制备方法、不同温度焙烧处理的Bi2O3纳米粒子的光催化活性.结果表明,以多元醇介质法和氨水沉淀法制备的Bi2O3微粒均为纳米晶粒,其晶型主要为四方型;随焙烧温度的升高固体表面电子结合能增大,导致光催化活性升高;其光催化活性多元醇介质法优于氨水沉淀法.Nanoparticles (Bi_2O_3) have been prepared by using the ammonia precipitation and polyol mediated methods. XRD, BET and XPS were used to characterize the nanoparticles. The photocatalytic oxidation of toluene was used as model reaction to measure the photocatalytic activity of (Bi_2O_3) nanoparticles. The results show that the prepared crystals possess a tetragonal structure. The electron combining energy of (Bi_2O_3) nanoparticles increases as the calcining temperature increases, resulting in the photocatalytic activity for toluene degradation to increase. The photocatalytic activity of (Bi_2O_3) nanoparticles produced by the polyol mediated method is higher than that of (Bi_2O_3) nanoparticles produced by the ammonia precipitation.

关 键 词：制备 三氧化二铋 光催化降解 纳米氧化铋 气-固复相光催化剂 

分 类 号：O643.36[理学—物理化学] TB383[理学—化学]