摘要
采用沉淀转换法制备了Ag@AgCl/Ag3PO4可见光光催化材料,并采用XRD、UV-vis、SEM及XPS等手段对其进行了表征。以水中甲基橙的降解为探针反应,考察了可见光照射下Ag@AgCl/Ag3PO4的光催化活性。XRD结果表明催化剂的晶型完整。Uv-vis吸收光谱分析可知Ag@AgCl/Ag3PO4催化剂的带隙明显变窄且对可见光吸收增强。SEM分析结果表明催化剂颗粒在0.5μm左右。XPS光谱表明催化剂表面的Ag0与Ag+含量明显增强。经分析可知,Ag@AgCl/Ag3PO4在可见光下具有较高光催化活性的主要原因可归结为:催化剂带隙能的减小、Ag0与AgCl形成的表面等离子共振效应及强氧化性Cl0的协同作用。
Photocatalytic material of Ag@AgCl/Ag3PO4 responded to visible light was prepared by precipitation replacement method and characterized by using XRD,UV-vis and XPS analysis methods in detail.The degradation of methyl orange in water was chosen as a probe reaction to study the photocatalytic activity of Ag@AgCl/Ag3PO4 under visible light irradiation.The Ag@AgCl/Ag3PO4 catalyst had complete crystal form,the narrow band-gap,and excellent absorption capacity for visible light clearly showed from XRD and UV-Vis absorption spectra results.SEM analysis results showed that the catalyst particles were 0.5 μm or so.XPS spectra indicated that the content of Ag＋ and Ag0 existed on catalyst surface was significantly enhanced.Experimental results showed that the main reasons for high photocatalytic activity of Ag@AgCl/Ag3PO4 may be reduce of band-gap,synergistic effect of the surface plasma resonance effect between Ag0 and AgCl and strong oxidizing of Cl0.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2012年第5期1286-1290,1297,共6页
Journal of Synthetic Crystals
基金
国家自然科学基金(21176168
21206105)
山西省科技攻关项目(20090311082)
