泡沫镍负载TiO_2和TiO_2/3Al_2O_3·2SiO_2薄膜的光催化性能  

Photocatalytic Activities of TiO_2 and TiO_2/3Al_2O_3·2SiO_2 Films Coated on Foam Nickel Substrates

作　　者：胡海[1] 肖文浚[1] 施建伟[1] 袁坚[1] 上官文峰[1] 

机构地区：[1]上海交通大学燃烧与环境技术研究中心,上海200240

出　　处：《稀有金属材料与工程》2008年第A02期143-147,共5页Rare Metal Materials and Engineering

基　　金：上海市科委纳米技术专项基金(0552nm002)

摘　　要：以泡沫镍为载体,3Al2O3.2SiO2作为过渡中间层,用溶胶-凝胶法在泡沫镍上负载锐钛矿相的TiO2薄膜,制成泡沫金属基的TiO2和TiO2/3Al2O3.2SiO2光催化材料,利用TG-DSC、XRD和FE-SEM等测试手段对其进行表征,用乙醛气体的光催化降解测试其光催化活性。研究表明:泡沫镍负载的TiO2和TiO2/3Al2O3.2SiO2薄膜均具有良好的光催化活性,其中,由于负载的3Al2O3.2SiO2过渡中间层增大了载体的比表面积,使负载光催化剂的活性位大大增加,因此,TiO2/3Al2O3.2SiO2薄膜的光催化活性较单一的TiO2薄膜有非常显著的提高。Anatase TiO2 and TiO2/3Al2O3·2SiO2 films were successfully prepared on foam nickel substrates by sol-gel technique. The characteristics and photocatalytic activities of the TiO2 and TiO2/3Al2O3·2SiO2 films were investigated by TG-DSC, XRD and FE-SEM, etc and by photocatalytic degradation reactions of gaseous acetaldehyde under ultraviolet light irradiation, respectively. The TiO2 and TiO2/3Al2O3·2SiO2 films coated on foam nickel substrates displayed high photocatalytic activity for the degradation of acetaldehyde. Comparing with the onefold TiO2 films coated on foam nickel, the TiO2/3Al2O3·2SiO2 films showed much higher photocatalytic activities. It was confirmed that photocatalytic activity was enhanced by coating 3Al2O3·2SiO2 as transition layer on foam nickel, which increased the specific surface areas of substrate surface, resulting in increasing the active sites of loading photocatalyst.

关 键 词：光催化 泡沫镍 TiO2/3Al2O3·2SiO2薄膜 溶胶凝胶法 乙醛降解 

分 类 号：TB383.2[一般工业技术—材料科学与工程] O643.36[理学—物理化学]