印染废水的纳米La-Pr-N-TiO_2光催化脱色  

Decolorization of dyeing wastewater by Nano La-Pr-N-TiO_2 photocatalyst

作　　者：单丹滢 邵红[1] SHAN Dan-ying SHAO Hong(College of Environment and Safety Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China)

机构地区：[1]沈阳化工大学环境与安全工程学院,辽宁沈阳110142

出　　处：《印染》2017年第1期6-10,共5页China Dyeing and Finishing

基　　金：国家水体污染控制与治理科技重大专项:辽河流域主要污染物排放控制研究及管理体系建设(2011ZX07530-02)

摘　　要：采用溶胶-凝胶法制备纳米La-Pr-N-TiO_2光催化剂,以XRD、SEM、FT-IR对制备样品的特性进行表征,并将其应用于印染废水的光催化处理。试验结果表明,掺杂多元素形成TiO_2晶格缺陷,能改变带隙间结构,有效抑制催化剂颗粒尺寸的生长,提高光催化性能。在光催化剂投加量2.0 g/L、曝气量1.5 L/min、反应时间2 h时,废水脱色率最高,达86.03%,废水光催化脱色过程符合一级动力学反应方程,反应速率常数为0.059 7 mg/(L·min)。The Nano La-Pr-N-TiO2 photocatalyst is prepared by sol-gel method, properties of the products are characterized by XRD, SEM and FT-IR. Photocatalyst is used to decolorize dye wastewater. The experimental results show that the doping multi-elements can format lattice defects of TiO2, change the structure between the band gaps, restrain the growth of the catalyst particle size, enhance the photo catalytic performance. When the quantity of catalyst is 2.0 g/L, aeration rate is 1.5 L/rain and reaction time is 2 h, the highest decolorization rate of dye wastewater can reach 86.03%. The photocatalysis decolorization reaction of dye wastewater is fit in with a first-order kinetic equation, and the reaction rate constant is 0.059 7 ma/（L·min）.

关 键 词：废水处理 光催化 La—Pr—N-TiO2催化剂 纳米 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学] X791[环境科学与工程—环境工程]