摘要
以介孔γ-Al2O3为载体,通过化学沉积与光还原法制备了Ag-AgBr/Al2O3等离子体诱导可见光催化材料。采用SEM、TEM、XRD及UV-Vis吸收光谱对复合材料进行结构与性能表征,并通过降解亚甲基蓝溶液对其光催化性能进行考察。研究结果表明,在可见光下照射1 h,催化材料对5 mg/L亚甲基蓝溶液的降解率达95%以上,总有机碳去除率为70%。由于表面金属的等离子体共振效应和介孔材料的吸附性能,催化剂具有很高的可见光催化活性和良好的稳定性,在开发新型等离子体诱导可见光催化剂方面应用前景广阔。
The surface plasmon resonance photocatalyst of Ag-AgBr /Al2O3 was synthesized by chemical precipitation and photochemical reduction method.AgBr nanoparticles were loaded onto the mesoporous aluminium oxide carrier by a precipitation reaction,and some of the AgBr particles were reduced to Ag particles under halogen tungsten lamp irradiation.The samples obtained were characterized by SEM,TEM,XRD and UV-Vis spectroscopy.The photocatalytic properties of catalyst were studied with methylene blue pollutant degraded under a visible light source.The results showed that the degradation rate of 5 mg/L methylene blue reached more than 95% and the removal rate of TOC was 70% under 60 min visible light irradiation.The catalyst showed highly efficient and stable under visible light illumination,and could be applied expansively in the field of developing new pattern visible light plasmon induced photocatalysts.
出处
《分析测试学报》
CAS
CSCD
北大核心
2012年第2期148-152,共5页
Journal of Instrumental Analysis
基金
河南省高校科技创新人才支持计划项目(2010HASTIT040)
关键词
溴化银
介孔Al2O3
光催化
可见光
等离子体效应
silver bromide
mesoporous aluminium oxide
photocatalysis
visible light
plasmon resonance effect
作者简介
通讯作者：周建伟，博士，教授，研究方向：光催化研究，Tel：0373～3682028，E—mail：jwzhou@xxu．edu．cn
