用Co_3O_4催化剂光催化氧化活性染料  

Photocatalytic Oxidation of Reactive Dye Using Co_3O_4 Catalyst

作　　者：娄向东[1] 韩珺[1] 楚文飞[1] 王学锋[1] 成庆堂[1] 

机构地区：[1]河南师范大学化学与环境科学学院,河南新乡453007

出　　处：《化工环保》2007年第2期117-120,共4页Environmental Protection of Chemical Industry

基　　金：河南省教育厅自然科学基金资助项目(200510476007);河南省科技攻关项目(0524250038)

摘　　要：以沉淀一热解法制备了纳米级Co3O4催化剂，并用X射线衍射仪、红外光谱仪对Co3O4催化剂进行了表征。以300W高压汞灯为光源，研究了Co3O4催化剂对不同活性染料的光催化氧化活性。实验结果表明：在活性染料质量浓度为20mg／L、250mL染料溶液中Co3O4催化剂加入量为150mg、反应2h的条件下，Co3O4催化剂对B—GFF黑、B—RN蓝、K—NR艳蓝3种活性染料溶液的脱色率分别为95％，87％，77％；适当加入酸或碱有利于提高处理效率，反应后染料溶液的pH为7．12～8．37，染料溶液初始pH为10．00时的脱色率最高为100％；Co3O4催化剂具有一定的再利用价值。Nano-Co3O4 catalyst was prepared by precipitation- pyrolysis process and characterized by XRD and IR. The photocatalytic oxidation activity of Co3O4 catalyst for different reactive dyes was studied using 300 W high pressure mercury lamp as light source. Under the conditions of reactive dye mass concentration 20 rag/L, Co3O4 catalyst dosage 150 mg in 250 mL dye solution and reaction time 2 h, the removal rate of black B-GFF, blue B-RN and brilliant blue K-NR is 95%, 87% and 77% respectively. The suitable addition of acid or base is favourable to improve the treatment effect with 7. 12 -8.37 of the treated solution pH, and the highest decolorization efficiency is 100% when the initial solution pH is 10.00. Moreover, the used Co3O4 catalyst has some value of reuse.

关 键 词：四氧化三钴 催化剂 光催化氧化 活性染料 

分 类 号：TQ032[化学工程] O614[理学—无机化学]