Ag-TiO_2负载玻璃纤维的制备及其光催化活性  

Preparation and Photocatalytic Activity of Ag-TiO_2 Deposited on Glass Fiber

作　　者：许第发[1] 林中信[1] 游洋[1] 张向超[1] 曹盈[1] 

机构地区：[1]长沙学院生物工程与环境科学系,长沙410022

出　　处：《材料导报》2012年第24期66-69,88,共5页Materials Reports

基　　金：国家自然科学基金(51102026);湖南省高校科技创新团队支持计划(湘教通[2010]21号);湖南省大学生研究性学习和创新性实验计划项目(湘教通[2011]272号)

摘　　要：以玻璃纤维(Glass fiber,GF)为载体,TiOSO4和AgNO3为原料,采用光催化还原法制备了Ag沉积纳米TiO2负载玻璃纤维(Ag-TiO2/GF),并以亚甲基蓝(MB)为目标降解物,考察了Ag-TiO2/GF在太阳光下的光催化活性。分别采用X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电镜(SEM)及紫外-可见吸收光谱(UV-Vis)对其结构和性能进行表征。结果表明,AgNO3的最佳沉积浓度为0.10mol/L,Ag以单质形式沉积于TiO2表面,适量的Ag沉积不仅能抑制TiO2晶粒的生长和团聚,而且能使Ag-TiO2的紫外-可见吸收曲线发生明显的红移。Ag-TiO2/GF在太阳光条件下120min内对亚甲基蓝溶液的降解率为93.0%,其光催化活性高于P25(商业TiO2)和未沉积Ag的样品。Ag-TiO2 deposited on glass fiber was prepared from TiOSO4 and AgNO3 by the photocatalytic reduction method,and the sunlight photocatalysis activity toward the degradation of mathylene blue was measured. The structure and characteristic were characterized using X-ray diffraction （XRD）, X-ray photoelectron spectroscopy （XPS）, scanning electron microscope （SEM） and ultraviolet-visible （UV-Vis） analysis technologies. The results indicate that the best concentration of AgNO3 was 0.10mol/L, the silver existed as elementary was successfully doped on the surface of TiO2 and deposited on the glass fiber closely. The silver particles with a proper loading could inhibit the growth and agglomeration of TiO2, moreover, UVVis refractive spectra show that its photocatalytic wavelength was apparently red shift. The sun-light photodegradation of mathylene blue on such photocatalyst show much higher photocatalytic activity than commercial P25 and pure TiO2, and the degradation rate reached 93.0% under sun-light irradiation for 120min.

关 键 词：TIO2 玻璃纤维 Ag沉积 光催化 

分 类 号：O649.2[理学—物理化学]