摘要
通过沉淀法成功制备了Ag2CO3/WO3复合光催化剂。用X-射线衍射、扫描电镜和紫外可见漫反射光谱对所制备的样品进行了表征。通过在可见光(λ>420nm)下降解水中的甲基橙来检测样品的光催化活性。结果表明:Ag2CO3/WO3的光催化活性和稳定性都高于纯相Ag2CO3,其原因是Ag2CO3导带上的光生电子易于向WO3上转移,提高了光生载流子的分离效率,也使得光生电子不再将Ag2CO3中的Ag+还原为Ag。
Ag2COa/WO3composites were successfully prepared by deposition method. The prepared samples were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and UV-vis ahsorption spectroscopy. The photocatalytic activity of samples was evaluated by photocatalytic degradation of methyl orange（MB）aqueous solutions un- der visible-light irradiation（λ 〉 420nm）. The results showed that Age CO3/WO3 exhibited much higher photocatalytic ac- tivity and stability than the respective pure Ag2CO3. The reason was that the photoinduced electrons on the conduct band of Ag2 C（）3 can be easily transferred to WO3, resulted in the increase of separation of photogenerated carriers and the decrease of reduction of Ag2 CO3.
出处
《化工新型材料》
CAS
CSCD
北大核心
2014年第4期58-60,共3页
New Chemical Materials
基金
湖北省自然科学基金(2012FFB01903和2011CDA066)
湖北省教育厅项目(.Q20132608
Q20122507和T201215)
