The nanocomposite materials containing rare earths, titanium dioxide and clay (RE/TiO2/Clay) were characterized and tested for the photocatalytic decomposition of formaldehyde. The results show that nanocomposite materials prepared by doping appropriate rare earth elements have better photocatalytic properties than that prepared by doping excessive rare earth elements. The photocatalytic mechanism of composite materials was studied by integrating the theory of photocatalysis with experiment results. Because the site of photocatalytic reaction was limited in the interspace of clay, photocatalytic reaction occurred by two steps: firstly, organic molecules dispersed into the interlayers of clay; secondly, organic molecules and photocatalyst of RE/TiO2 occurred photocatalytic reaction, resulting in forming carbon dioxide.
参考文献
| [1] | Sterte J .Synthesis and properties of titanium oxide cross-linked montmorillonite[J].Clays and Clay Minerals,1986,34(06):638. |
| [2] | Chen X Y;Tao L X;Zheng L B .Synthesis of titanium pillared clay Ⅰ.TiCl4 as titanium source[J].催化学报,1994,15(05):355. |
| [3] | Lucjan Chmielarz;Piotr Kustrowski;Malgorzata Zbroja;Alicja Rafalska-Lasocha;Barbara Dudek Roman Dziembaj .SCR of NO by NH_3 on alumina or titania-pillared montmorillonite various modified with Cu or Co Part I.General characterization and catalysts screening[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2003(2):103-116. |
| [4] | Chae HJ;Nam IS;Ham SW;Hong SB .Characteristics of vanadia on the surface of V2O5/Ti-PILC catalyst for the reduction of NOx by NH3[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2004(2):117-126. |
| [5] | Bahranowski K;Kielski A;Serwicka E M et al.Infuence of doping with copper on the texture of pillared montmorillonite catalysts[J].Microporous and Mesoporous Materials,2000,41(1-3):201. |
| [6] | Maes N;Heylen I;Cool P et al.The relation between the synthesis of pillared clay and their resulting porosity[J].Applied Clay Science,1997,12(1-2):43. |
| [7] | Chen X Y;Tao L X;Zheng L B .Synthesis of titanium pillared clay Ⅱ.Ti(SO4)2 as titanium source[J].催化学报,1994,15(05):361. |
| [8] | Sun Z S;Chen Y X;Ke Q .Photocatalytic degradation of cationic azo dye by TiO2/bentonite nanocomposite[J].环境科学学报(英文版),2003,23(01):129. |
| [9] | Ding Z;Zhu H Y;Lu G Q et al.Photocatalytic properties of titania pillared clay by different drying methods[J].Journal of Colloid and Interface Science,1999,209(01):193. |
| [10] | 孙家寿,杨琼.交联蒙脱土研究进展[J].中国矿业,2003(03):46-48. |
| [11] | 梁金生,金宗哲,王静.稀土/纳米TiO2的表面电子结构[J].中国稀土学报,2002(01):74-76. |
| [12] | Yu J M;Liang J S;Ou X Q et al.Effects of rare earth elements on preparation of TiO2-pillared bentonite[J].中国稀土学报,2005,23(z1):324. |
| [13] | Lincebigler A L;Lu G Q;Yates J T .Photocatalysis on TiO2 surfaces:principle,mechanisms,and selected results[J].Chemical Reviews,1995,95(03):735. |
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