摘要
以γ-氧化铝(γ-Al2O3)为载体,采用均匀沉淀法制备了不同氧化锌(ZnO)负载量的纳米ZnO/γ-Al2O3复合物。通过X射线衍射(XRD)、扫描电镜(SEM)、红外光谱(FT-IR)和氮气吸附,对复合物的结构、表面形貌、组成和比表面积进行了表征。以壬基酚聚氧乙烯醚(NPE-10)和苯酚为模型污染物,对复合物的光催化性能进行了评价。结果表明:当ZnO与γ-Al2O3按质量比为2∶1加料制备ZnO/γ-Al2O3复合物时,ZnO成功负载到γ-Al2O3表面,并形成均匀的薄膜;以制备的ZnO/γ-Al2O3复合物为催化剂在紫外光照射2 h后NPE-10的降解率达到93%,苯酚的降解率达到20%,且它们的降解率均随着溶液初始浓度的增大而降低。
Nano-sized ZnO/γ-Al2O3 composites with different ZnO loadings were prepared by homogeneous precipitation method and with γ-Al2O3was employed as supporter. Structure, surface morphology, composition, and specific surface area of composites were characterized by X - ray diffraction ( XRD ), scanning electron microscopy ( SEM ), FT - IR, and N2 adsorption. Photocatalytic performance of composites were appraised using nonylphenyl poly(oxyethylene) ether (NPE -10) and phenol as model pollutants. Resuh indicated that ZnO was successfully loaded on the surface of γ-Al2O3 When the mass ratio of ZnO to γ-Al2O3 was 2:1 ,ZnO thin films were uniformly immobilized on the surface of γ-Al2O3 ,and the photoeatalytic performance of ZnO/γ-Al2O3 composite which was prepared under these conditions and the effect of initial NPE- 10 and phenol concentration on the degradation rate were investigated. It was found that the degradation rate of NPE -10 and phenol reached 93% and 20% , respectively, when they were irradiated by the ultraviolet light for 2 h, and their degradation rates were decreasing with the initial concentration enhancement.
出处
《无机盐工业》
CAS
北大核心
2011年第12期32-35,共4页
Inorganic Chemicals Industry
关键词
氧化锌
氧化铝
壬基酚聚氧乙烯醚
苯酚
光催化
zinc oxide
aluminum oxide
nonylphenyl poly ( oxyethylene ) ether
phenol
photoeatalysis