NiO_x/介孔杭锦2~#土的制备及其对苯羟基化光催化性能研究

Hydroxylation of Benzene to Phenol by Photocatalysis on NiO_x/Meso Hangjin 2~# Clay

以沉积沉淀法制备Ni Ox/介孔杭锦2#土催化剂,通过X射线粉末衍射,比表面积及孔结构分析,固体紫外可见漫反射等手段对催化剂进行了表征.以H2O2为氧化剂,在汞灯照射下,研究其对光催化苯直接羟基化反应的催化性能,并探讨了镍的负载量,光源等因素对苯直接氧化制苯酚反应的影响.结果表明,随着镍含量的增加,苯酚的选择性和产率先增大后减小.在优化的反应条件下,苯酚的选择性和产率分别为93%和为56%.

To use (CH3 COO)2 Ni and Hangjin 2 # clay as raw material,prepared NiOx /meso Hangjin 2 # clay. NiOx /meso Hangjin 2 #clay was characterized by X-ray diffraction,nitrogen adsorption-desorption,high-resolution transmission electron microscopy,energy dispersive X-ray analysis,and UV-visible diffuse reflectance spectrosco-py.The catalytic properties of NiOx /meso Hangjin 2 #clay were studied by direct hydroxylation of benzene with H2 O2 in photocatalytic reaction,and discussed the influence of nickel loading,light on the direct oxidation of ben-zene to phenol reaction.The results show that with increasing nickel content,selectivity and yield of phenol in-creased first and then decreased.Under the optimized reaction conditions,selectivity and yield of phenol were 93%and 56% respectively.