负载TiO_2活性炭的制备及催化光降解麦草畏  

Preparation of TiO_2-mounted Activated Carbon and Photocatalytic Degradation of Dicamba

作　　者：张春荣[1] 王慧[1] 刘金芝[1] 窦建芝[1] 申大忠[1] 

机构地区：[1]山东师范大学化学化工与材料科学学院,济南250014

出　　处：《常熟理工学院学报》2011年第2期52-55,共4页Journal of Changshu Institute of Technology

基　　金：山东省自然科学基金(NoY2008B12)资助项目

摘　　要：以废纸为原料,经磷酸活化后与纳米TiO2混合,再经微波加热炭化制备出负载纳米TiO2的活性炭光催化剂,实验测定了该催化剂对麦草畏的吸附性能,其吸附等温线可用Freundlich和Langmuir等温线模型进行回归分析,饱和吸附量为101.2mg/g.该催化剂在紫外光下可降解除草剂麦草畏,和未负载活性炭的纳米TiO2催化剂相比,所制备的催化剂光催化活性更高,有较好的沉降分离性和过滤分离性,有利于光催化剂从溶液中分离和重复使用.Composite photocatalyst of TiO2/activated carbon was prepared by mixing TiO2 nanoparticles with active carbon,which was made by waste paper with H3PO3 activation and microwave irradiation.The adsorption of dicamba onto the prepared photocatalyst was investigated.The adsorption isotherm was fitted by Freundlich and Langmuir models.The saturation amount of dicamba adsorbed was estimated to be 101.2 mg/g.The photocatalytic degradation of dicamba under ultraviolet radiation was tested.Compared to the TiO2 nanoparticles without activated carbon,the composite had higher photocatalytic activity and better separation characteristic in sedimentation and filter,which is helpful for the separation of photocatalyst from liquid phase and reuse.

关 键 词：光催化降解 二氧化钛 活性炭 麦草畏 

分 类 号：O657[理学—分析化学]