金钯负载TiO_2-rGO光催化降解2,4-二氯苯酚  

Photocatalytic Degradation of 2,4-DCP Using TiO_2-rGO-Au-Pd Composite Photocatalyst

作　　者：乔小宇[1] 于洪斌[1] 路莹[1] 秦伟超[1] 霍明昕[1] Qiao Xiaoyu Yu Hongbin Lu Ying Qin Weichao Huo Mingxin(School of Environment, Northeast Norrmal University, Changchun 130117, China)

机构地区：[1]东北师范大学环境学院,吉林长春130117

出　　处：《水处理技术》2016年第10期53-57,共5页Technology of Water Treatment

基　　金：国家自然科学基金资助项目(51378098;51238001;21307010)

摘　　要：采用水热法和光还原沉积法制备了TiO_2-rGO-Au-Pd复合光催化剂,对其进行紫外-可见-近红外分光光度计、X射线衍射仪、扫描电镜表征,并研究该材料在紫外光照射下对2,4-二氯苯酚(2,4-DCP)的光催化降解性能。结果表明,经过180 min光照,单纯TiO_2条件下,2,4-DCP的降解效率仅为46.2%;复合rGO后,降解效率升高至69.59%;当负载贵金属Au和Pd时,其降解效率进一步得到提高(86.62%),证明复合r GO和负载贵金属能够有效提高催化剂的光催化降解能力。随着溶液2,4-DCP含量的升高,TiO_2-rGO-Au-Pd对2,4-DCP的光催化降解效率呈下降趋势。The photocatalyst of TiO2-rGO-Au-Pd was prepared using the hydrothermal method and the light reduction deposition method. The photocatalysts were characterized by X-ray diffraction, ultraviolet-visible diffuse reflectance spectroscopy, and scanning electron microscope. The photocatalytic degradation of 2,4-DCP has been investigated under UV irradiation. The results illustrate that the efficiency of 2,4-DCP degradation is only 46.2% after 180 minutes＇ reaction using TiO_2 as photocatalysts. However, after being combined with rGO and rGO-Au-Pd, the efficiency increased to 69.59% and 86.62%, respectively.This has proved that loading rGO and the noble metal could greatly improve the photocatalytic degradation ability of TiO2. Additionally, the photocatalytic performance of the TiO2-rGO-Au-Pd is decreasing with the increase of 2,4-DCP content.

关 键 词：水热法 TIO2 rGO 贵金属 光催化 2 4-DCP 

分 类 号：X703.1[环境科学与工程—环境工程]