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AuCo/水滑石复合氧化物的制备及其光催化性能
作者:张冠华1 张晓锋1 薛继龙1  跃2 夏盛杰1 倪哲明1 
单位:(1. 浙江工业大学化学工程学院 杭州310014 2. 湖州师范学院生命科学学院 浙江 湖州313000) 
关键词:水滑石   复合氧化物 光催化 邻苯二酚 
分类号:O615
出版年,卷(期):页码:2019,47(4):0-0
DOI:
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.

基金项目:
国家自然科学基金项目(21503188);浙江省自然科学基金项目(LQ15B030002)。
作者简介:
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