Effect of metal doping into Ce0.5Zr0.5O2 on photocatalytic activity of TiO2/Ce0.45Zr0.45M0.1OX (M=Y, La, Mn).
The paper demonstrates that the photocatalytic activity of TiO2 towards the decomposition of gaseous benzene in a batch reactor can be greatly improved by loading TiO2 on the surface of CeO(2)-ZrO(2). The research investigates the effects of three metals doping into Ce(0.5)Zr(0.5)O(2) on photocatalytic activity of TiO2/Ce(0.45)Zr(0.45)M(0.1)O(X) (M=Y, La, Mn). The prepared photocatalysts were characterized by BET, XRD, UV-vis diffuse reflectance and XPS analyses. BET surface area of TiO2/Ce(0.45)Zr(0.45)M(0.1)O(X) (M=Y, La, Mn) is smaller than that of Ce(0.5)Zr(0.5)O(2). XRD results reveal that the deposited titania is highly dispersed as in the CeO(2)-ZrO(2) matrix, doping M in the CeO(2)-ZrO(2) lattice causes the changing of lattice space and the diffraction peaks shift to higher 2theta position. Among these four catalysts, the band gap value of TiO(2)/Ce(0.45)Zr(0.45)La(0.1)O(X) is the lowest. The binding energy value of Ti 2p(3/2) of four catalysts transfers to a lower value. The order of photocatalytic activity is TiO2/Ce(0.45)Zr(0.45)La(0.1)O(X)>TiO2/Ce(0.45)Zr(0.45)Y(0.1)O(X)>TiO2/Ce(0.45)Zr(0.45)Mn(0.1)O(X)>TiO2/Ce(0.5)Zr(0.5)O(2)>TiO2. The proposed mechanism is of electron transfer and the stronger absorption in the region 210-400 nm.
Bo
Zhong Jun
ZJ
College of Chemistry, Sichuan University, Chengdu 610064, Sichuan, China. zhongjunbo@Sohu.Com
Lintao
Maochu
Gong
G
Li
Wang Jian
WJ
Min
Liu Zhi
LZ
Ming
Zhao
Z
Chen
Yaoqiang
Y
D000393:Air Pollutants / Q000737:chemistry*; D001554:Benzene / Q000737:chemistry*; D002384:Catalysis; D002563:Cerium / Q000737:chemistry*; D007811:Lanthanum / Q000737:chemistry; D008345:Manganese / Q000737:chemistry; D008670:Metals / Q000737:chemistry*; D010782:Photolysis; D013057:Spectrum Analysis; D014025:Titanium / Q000737:chemistry; D014961:X-Ray Diffraction; D014965:X-Rays; D015019:Yttrium / Q000737:chemistry; D015040:Zirconium / Q000737:chemistry*
D000393:Air Pollutants; D008670:Metals; C009495:titanium dioxide; D002563:Cerium; D008345:Manganese; D015019:Yttrium; C030583:ceric oxide; D007811:Lanthanum; D015040:Zirconium; D014025:Titanium; D001554:Benzene; C028541:zirconium oxide