摘要
采用浸渍-还原方法将不同比例的金钴(Au、Co)负载到锌铝水滑石(AuCo/ZnAl-LDHs)表面,经焙烧得到具有较高光催化性能的复合氧化物(AuCo/ZnAl-LDO),借助X射线粉末衍射、透射电子显微镜和紫外-可见漫反射光谱技术对样品的晶体结构、表面形貌和光吸收特性进行表征,并考察了材料对邻苯二酚光催化降解性能。实验表明:Au、Co总负载量为2%时,n(Au)/n(Co)摩尔比为5:1,焙烧温度为400℃的光催化剂对邻苯二酚的降解表现出的最佳的性能,5 h对邻苯二酚的降解率达到了94.7%。
Gold and cobalt were loaded on the surface of zinc-aluminum layered double hydroxides at different ratios via an impregnation-reduction process.The composites mental oxides as a high photocatalytic material were derived from AuCo/ZnAl-LDHs after calcination.The crystal structure,morphology and optical performance of samples were characterized by X-ray diffraction,transmission electron microscopy and ultraviolet-visible diffuse-reflectance spectroscopy,respectively.The photocatalytic activities were evaluated via the degradation of catechol under visible light irradiation.The results show that the photocatalyst with a total loading mass of Au/Co of 2%and Au:Co molar ratio of 5:1,calcined at 400℃has an optimum degradation efficiency of catechol.In this case,94.7%of catechol can be degraded at 5 h.
作者
张冠华
张晓锋
薛继龙
孟跃
夏盛杰
倪哲明
ZHANG Guanhua;ZHANG Xiaofeng;XUE Jilong;MENG Yue;XIA Shengjie;NI Zheming(College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310014,China;School of Life Sciences,Huzhou University,Huzhou,313000,Zhejiang,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2019年第4期466-472,共7页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金项目(21503188)
浙江省自然科学基金项目(LQ15B030002)
关键词
水滑石
全
钴
复合氧化物
光催化
邻苯二酚
layered double hydroxides
gold and cobalt loading
composite oxide
photocatalysis
catechol
