纳米FeVO_4的制备及其可见光下降解甲苯的性能  

Preparation of Nano FeVO_4 and Its Degradation Capability to Toluene Under Visible Light

作　　者：李思佳[1] 邹学军[1,2] 董玉瑛[1] 李新勇[2] 杨宝灵[1] 

机构地区：[1]大连民族学院环境与资源学院,辽宁大连116600 [2]大连理工大学环境学院,辽宁大连116024

出　　处：《化工环保》2015年第2期182-186,共5页Environmental Protection of Chemical Industry

基　　金：国家自然科学基金项目(21477001);大连民族学院人才引进科研项目启动基金(20126113);大学生创新创业训练计划(G2014034);大连民族学院太阳鸟计划(tyn2014342)

摘　　要：以Fe(NO3)3或FeCl3作为铁源,采用水热法制备了纳米FeVO4光催化剂,通过XRD、SEM、DRS等手段表征了所合成FeVO4的物相、表面形貌及光学性质,研究了其可见光下光催化降解甲苯的性能。表征结果显示:FeVO4平均晶粒尺寸约为75 nm,为棒状;FeVO4在可见光区域(λ>400 nm)表现出较高的吸光性,其吸光区域可红移至约600 nm;以FeCl3为铁源,水热反应3 h制备的FeVO4的禁带宽度为2.1 e V;以Fe(NO3)3为铁源制备的FeVO4的比表面积(74.70 m2/g)大于以FeCl3为铁源制备的FeVO4的比表面积(67.72 m2/g)。在初始甲苯质量浓度为494 mg/L、FeVO4为光催化剂、反应4 h的条件下,甲苯降解率达62%。甲苯降解最终产物为CO2和H2O。The nano FeVO4 photocatalyst was prepared by hydrothermal method using Fe（NO3）3 or FeCl3 as Fe source,and was characterized by XRD,SEM and DRS. Its photocatalytic properties on toluene degradation under visible light were investigated. The characterization results show that：The FeVO4 grain is rodlike crystal with 75 nm of the average size;In the visible light region（λ〉400 nm）,FeVO4 has high absorbance and its light absorption region extends to about 600 nm（red shift）;The band gap of FeVO4 prepared using FeCl3 as Fe source and hydrothermal reacted for 3 h is 2.1 e V;The surface area of FeVO4 prepared using Fe（NO3）3 as Fe source（74.70 m2/g） is larger than that using FeCl3（67.72 m2/g）. Under the conditions of initial toluene mass concentration 494 mg/L,using FeVO4 as photocatalyst and reaction time 4 h,the degradation rate of toluene reaches 62%. And the fi nal products from toluene degradation are CO2 and H2 O.

关 键 词：钒酸铁 光催化剂 甲苯降解 

分 类 号：X511[环境科学与工程—环境工程]