以钛酸四丁酯以及六水合硝酸铈为原料,采用溶胶-凝胶法制备了纯的和Ce掺杂的TiO_2粉体,研究了不同掺杂量对TiO_2晶形转变产生的影响.结果表明,Ce离子的掺杂阻碍了TiO_2粒子由锐钛矿型向金红石型的转变,拓宽了锐钛矿型TiO_2的使用温度范围;TiO_2晶粒的尺寸的变化是随着焙烧温度的升高逐渐长大,随掺杂量的增加逐渐减小.TiO_2粉体粒子在锐钛矿型状态下,颗粒分散较为均匀,并且无明显团聚现象.
With Ti(OBu)_4 and Ce(NO_3)_3·6H_2O as raw material,the pure and Ce doped TiO_2 powder were prepared by a sol-gel method.The effect of dopping amount on the crystal transformation of TiO_2 was studied.The results showed that the doped Ce hindered the process of phase transition of TiO_2 particles from anatase to rutile,and propagated the temperature ranges of anatase.The crystallites growed larger with the increasing of the calcination temperature,and the crystal size became smaller with the doping increased.TiO_2 particles were well dispersed in the state of anatase,with no agglomerates observed.
参考文献
| [1] | Raffaele M;Cesare G;Enrico D et al.[J].Catalysis Today,2001,67(1-3):273-279. |
| [2] | Kei I;Takashi K;Masataka .[J].Chemical Communications,2005,3:2131-2133. |
| [3] | Andjelka S T;Daniela V (S);Dora A M G et al.[J].Applied Catalysis B:Environmental,2004,54(02):125-133. |
| [4] | Yu JG.;Zhao QN.;Zhao XJ. .Effect of surface structure on photocatalytic activity of TiO2 thin films prepared by sol-gel method[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,2000(1/2):7-14. |
| [5] | Chiang K;Lim T M;Tsen L et al.[J].Applied Catalysis A:General,2004,261(02):225-237. |
| [6] | Fujishima A;Honda K .[J].Nature,1972,238(5358):37-40. |
| [7] | Suryanarayanan R;Naik VM;Kharel P;Talagala P;Naik R .Feffornagnetism at 300 K in spin-coated films of Co doped anatase and rutile-TiO2[J].Solid State Communications,2005(7):439-443. |
| [8] | Campostrini R;Carturan G .[J].Materials Chemistry and Physics,1994,38(03):277-283. |
| [9] | 顾德恩,杨邦朝,胡永达.非金属元素掺杂TiO2的可见光催化活性研究进展[J].功能材料,2008(01):1-5. |
| [10] | Yang Y;Li X J;Chen J T et al.[J].Journal of Photochemistry and Photobiology A:Chemistry,2004,163(03):517-522. |
| [11] | Ding X Z;Liu L;Ma X M et al.[J].Journal of Materials Science Letters,1994,13:462-467. |
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