上转换材料复合介孔TiO_2晶须的可见光催化性能  

Visible-light photocatalysis performances of mesoporous TiO_2 whiskers combined with upconversion luminescence

作　　者：周乃亮[1] 姚文俊[1] 王昌松[1] 

机构地区：[1]南京工业大学材料化学工程国家重点实验室,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2012年第2期39-43,共5页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(BK2009497)

摘　　要：用溶胶凝胶法制备上转换发光材料Y3Al5O12:Er。反射光谱、发射光谱表明:Y3Al5O12:Er在480 nm光的激发下,产生2个<387 nm的紫外光发射峰。将上转换材料介孔TiO2晶须复合成可见光催化剂,采用X线衍射仪(XRD)、场发射扫描电子显微镜(FESEM)以及低温N2吸附-脱附(BET)等对催化剂进行表征,通过光催化降解亚甲基蓝(MB),对催化剂的活性进行测试。结果表明:复合上转换材料的介孔TiO2晶须在可见光下能够有效降解MB,10%Y3Al5O12:Er的介孔TiO2晶须的MB降解率为73%。A series of upconversion luminescent materials Y3Al5O12：Er were prepared by sol-gel method.Two UV emission peaks（〈387 nm） were generated at 480 nm by excitation with reflectance spectroscopy and excitation spectroscopy characterization.Mesoporous TiO2 whiskers combined with upconversion luminescence Y3Al5O12：Er were characterized by X-ray diffraction（XRD）,field emission scanning electron microscopy（FESEM）,and N2 adsorption-desorption measurement（BET）.The corresponding photocatalytic performances were tested by the degradation of methylene blue（MB）.Results showed that the composite catalysts could effectively degrade MB in visible light.The degradation of MB by mesoporous TiO2 whiskers combined with 10% Y3Al5O12：Er in visible light was 73%.

关 键 词：介孔TiO2晶须 Y3Al5O12:Er 上转换材料 可见光催化 

分 类 号：O643[理学—物理化学]