Study on Photocatalytic Oxidation of Nitrite over RE/TiO2 Photocatalysts
RE/TiO2 photocatalysts were prepared by using sol-gel method with rare earth (RE=La,Ce,Er,Pr,Gd,Nd,Sm) salts and titanium tetrabutoxide as precursors, and we re characterized by XRD,IR,UV-Vis diffuse reflection techniques. The photocatal ytic activity of the catalysts was tested with nitrite as objective decompositio n substance. As a result, doping suitable content of rare earth elements can eff iciently expand the range of light absorbed by the catalysts. At the same time, the doping can be beneficial to NO-2 adsorption over the catalysts. Doping R E in TiO2 can, more or less, enhance the photocatalytic activity. Gd/TiO2 sh ows the highest catalytic activity among all the RE/TiO2 samples concerned. Th e doped RE content is an important factor for the photocatalytic activity; the o ptimum RE content is about 0.5%.
NETL
NSTL
万方数据
