石墨烯光催化降解罗丹明B  

Photocatalytic Degradation of Rhodamine B by Graphene

作　　者：冯若愚[1] 刘春林[1] 叶伟东[1] 孙春燕[1] 

机构地区：[1]绍兴文理学院化学化工学院,浙江绍兴312000

出　　处：《绍兴文理学院学报》2015年第10期24-28,共5页Journal of Shaoxing University

摘　　要：当前水环境污染的控制与治理是全世界共同关注的问题,而水环境中染料的污染尤为严重.以新型材料石墨烯为光催化剂,研究了石墨烯光催化降解常见染料污染物罗丹明B(Rh B)的动力学及影响因素.研究表明:石墨烯在可见光照下能有效降解Rh B.反应中有氧环境有利于Rh B降解;催化降解的机理为光催化氧化;酸性条件使染料Rh B在石墨烯表面的吸附量增加,使降解速率加快;碱性条件不利于Rh B在石墨烯表面的吸附,而使降解反应受到抑制;腐植酸的存在可促进石墨烯降解Rh B.The control and treatment of the current water pollution, especially the dye pollution, is a common concern in the world. This paper is a report regarding the degradation of dye pollutants RhB by a new photocata- lytic grapheme. The degradation kinetics of RhB was further investigated under different reaction conditions. The rapid degradation of RhB occurred in the air condition by grapheme under visible light irradiation. The mechanism of the reaction is photocatalytic oxidation and oxygen can enhance the degradation of RhB. Accordingly, the addition of acid / base can enhance/suppress the reduction of RhB due to the significant effect of adsorption on grapheme. Humic acid can accelerate the degradation of RhB by grapheme.

关 键 词：染料 石墨烯 光催化 环境污染物 

分 类 号：X52[环境科学与工程—环境工程]