本文以TiCl4水解法制备的锐钛矿型纳米TiO2为原料,采用真空热处理对其进行改性处理.利用XRD、XPS、紫外可见分光光度计等测试手段对真空热处理前后的纳米TiO2粉末进行了表征,并对结果进行了分析.结果表明,纳米TiO2经400℃×40min,真空度在1.0E-2Pa以下热处理后,在TiO2晶格中形成了氧空位缺陷,改变了TiO2的能带结构,得到了具有可见光催化活性的TiO2-x.其吸收阀值红移至550nm左右,实现了其对可见光的吸收.
参考文献
| [1] | 张青红,高濂,郭景坤.量子尺寸氧化钛纳米晶的制备及其光谱研究[J].无机材料学报,2000(05):929-934. |
| [2] | Jungwoo Moon;Chang Yeon Yun et al.Photocatalytic activation of TiO2 under visible light using Acid Red 44[J].Catalysis Today,2003,87:77-78. |
| [3] | 韩世同,习海玲,史瑞雪,付贤智,王绪绪.半导体光催化研究进展与展望[J].化学物理学报,2003(05):339-349. |
| [4] | 彭峰,任艳群.TiO2-SnO2复合纳米膜的制备及其光催化降解甲苯的活性[J].催化学报,2003(04):243-247. |
| [5] | Li YZ;Hwang DS;Lee NH;Kim SJ .Synthesis and characterization of carbon-doped titania as an artificial solar light sensitive photocatalyst[J].Chemical Physics Letters,2005(1/3):25-29. |
| [6] | Hiromi Yamashita;Masaru Harada;Junko Misaka et al.Photocatalytic degradation of organic compounds diluted in water using visible light-responsive metal ion-implanted TiO2 catalysts:Fe ion-implanted TiO2[J].Catalysis Today,2003,84:191-196. |
| [7] | 万海保;曹立新;王丽颖.染料敏化的TiO2纳米晶多孔膜的性质及其光电转变换[J].化学通报（印刷版）,1999(06):30. |
| [8] | Vogel R;Hoger P;Weller H .Quantum-sized PbS,CdS,Ag2S,Sb2S3 and Bi2S3 particles as sensitizers for various nanoporous wide-bandage semiconductor[J].Physical Chemistry,1994,98(12):3183-3188. |
| [9] | Asahi R;Morikawa T;Ohwaki T et al.Visible-Light photocatalysis in nitrogen doped titanium oxides[J].Science,2001,293(13):269-271. |
| [10] | Kwang-Wook Kim;Eil-Hee Lee;Young-Jun Kim;Mi-Hye Lee;Kwang-Ho Kim;Dong-Woo Shin .A relation between the non-stoichiometry and hydroxyl radical generated at photocatalytic TiO_2 on 4CP decomposition[J].Journal of Photochemistry and Photobiology, A. Chemistry,2003(3):301-310. |
| [11] | 崔国文.缺陷,扩散与烧结[M].北京:清华大学出版社,1990:9-46. |
| [12] | Nakamura I.;Kutsuna S.;Ihara T.;Sugihara S.;Takeuchi E.;Negishi N. .Role of oxygen vacancy in the plasma-treated TiO2 photocatalyst with visible light activity for NO removal[J].Journal of molecular catalysis, A. Chemical,2000(1/2):205-212. |
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