摘要
采用微乳法制备了镍、铋复合氧化物纳米粒子,以XRD、TG-DTA、XPS及紫外-可见光谱仪对合成材料进行了表征,并以甲苯为目标污染物对其气-固复相光催化性能进行了研究。结果表明:Ni和Bi都显+3价,XRD曲线上分别出现Ni2O3和Bi2O3的特征衍射峰,制备样品是Ni2O3与Bi2O3复合氧化物,对于单一Bi2O3,制备的复合氧化物由于Ni2O3具有较强的电子富集能力,能够快速地传递光照射产生的电子,导致光生电子与空穴分离效率大大提高,促进了氧化反应,显示出了较好的光催化活性。
Bi2O3-Ni2O3 nano-particles were prepared by microemulsion method and their characteristics were discussed by XRD,XPS,TG-DTA and UV-Vis.The gas-solid multiphase photocatalytic performance of Bi2O3-Ni2O3 nano-particles were studied by researching photocatalytic degradation of toluene under the xenon lamp.All results showed that the valence of Ni and Bi was both ＋3.The characteristic diffraction peaks of Ni2O3 and Bi2O3 were respectively observed by XRD.The separating efficiency of electrons and holes was improved greatly because of the Ni2O3 could strongly enrich electron and quickly transfer electron.The oxidation reaction was promoted by Ni2O3.Compared with single Bi2O3,the photocatalytic activity of Bi2O3-Ni2O3 composite oxides was enhanced greatly.
出处
《环境工程》
CAS
CSCD
北大核心
2012年第5期140-143,共4页
Environmental Engineering
基金
长春师范学院自然科学基金([2010]第006号)
国家自然科学基金项目(21041007
20277015)
关键词
微乳法
复合氧化物
甲苯
光催化
降解
microemulsion method
composite oxides
toluene
photocatalytic
degradation
