一步法制备石墨烯复合花状钨酸铋光催化剂  

One-step Synthesis of Flower-like Bi_2WO_6-rGO Composite Photocatalysts

作　　者：郭丹[1] 王苹[1] 郑琪颖 王进[1] 

机构地区：[1]武汉理工大学化学化工与生命科学学院化学系,武汉430070

出　　处：《无机材料学报》2014年第11期1193-1198,共6页Journal of Inorganic Materials

基　　金：国家级大学生创新创业训练计划项目(20131049714002);国家自然科学基金(61274129)~~

摘　　要：采用一步水热法合成石墨烯复合花状钨酸铋高效可见光光催化剂。降解甲基橙的性能实验结果表明,与单纯的Bi2WO6相比,所有Bi2WO6-rGO复合光催化剂表现出更高的光催化性能。其中,Bi2WO6-rGO(0.5wt%)具有最高的光催化活性,其速率常数达到5.0×10-2/min,是纯Bi2WO6的1.7倍。增强光催化性能的原因归结为以下两方面的协同作用:还原石墨烯在复合光催化剂中起到了电子快速传输作用;石墨烯提供了有利于吸附有机污染物的大比表面积。本研究可以为设计与合成高性能石墨烯基光催化剂提供新的思路。A one-step hydrothermal method was developed for fabrication of flower-like Bi2WO6-rGO composite photocatalysts with high-efficiency visible-light photocatalytic activity. Photocatalytic experimental results for the decolorization of methyl orange （MO） aqueous solution indicated that all the resulted Bi2WO6-rGO photocatalysts exhibited a much higher photocatalytic performance than the pure Bi2WO6, and the Bi2WO6-rGO （0.5wt%） showed the highest photocatalytic activity with a k = 5.0×10^-2/min, a value as 1.7 times as that of the pure Bi2WO6. The enhanced performance can be attributed to the cooperation effect of rGO nanosheet which promoted the effective transfer of photogenerated electrons and provided large surface area for absorbing organic pollutants. This work may provide new insights into design and fabrication of high-performance graphene-based photocatalytic mate- rials.

关 键 词：钨酸铋 石墨烯 石墨烯复合钨酸铋光催化剂 可见光光催化性能 

分 类 号：O643[理学—物理化学]