摘要
采用氨浸法与均匀沉淀法结合制备了不同Ag负载量的纳米ZnO/γ-Al2O3复合物,并用X射线衍射和X射线光电子能谱测定了Ag改性ZnO/γ-Al2O3复合物的晶型结构和表面元素组成及其化学态。以苯酚为模型污染物,在紫外光下考察了Ag改性前后纳米ZnO/γ-Al2O3复合物的光催化活性。结果表明,Ag能成功地负载到ZnO/γ-Al2O3复合物的表面,并以Ag原子的形式存在。光催化降解结果表明,0.8%Ag改性ZnO/γ-Al2O3复合物的光催化活性最高,在紫外光照射4 h后苯酚的降解率达到99.5%,与未改性时的降解率相比提高了约13%。
Different Ag loadings nano-ZnO/γ-Al2O3 composites were prepared by combining ammonia immersion method and homogeneous precipitation method.The crystal structure,surface element composition and their chemical states of Ag modified ZnO/γ-Al2O3 composites were analyzed by X-ray diffraction and X-ray photoelectron spectroscopy.The photocatalytic performance of nano-ZnO/γ-Al2O3composites before and after Ag modifying were appraised using phenol as the model pollutant under the irradiation with ultraviolet light.The results showed that Ag could be successfully supported on the surface of ZnO/γ-Al2O3 composites with the style of Ag atom.The result of photocatalytic degradation indicated that the photocatalytic activity of the 0.8% Ag modified ZnO/γ-Al2O3 composites was the highest,and the degradation rate of phenol was 99.5% under irradiation of ultraviolet light for 4 h.The degradation rate enhanced about 13% than that of unmodified.
出处
《化工新型材料》
CAS
CSCD
北大核心
2011年第5期95-97,100,共4页
New Chemical Materials
基金
山西省重点实验室开放基金(批准号2008012013-11)
关键词
氧化锌
氧化铝
负载
苯酚
Ag改性
光催化
zinc oxide
aluminum oxide
Loading
phenol
Ag modification
photocatalysis