在3种晶型(锐钛矿型、板钛矿型和金红石型)的TiO2中,只有锐钛矿型的TiO2具有较好的光催化活性.因为钛矿型TiO2不稳定,它容易转化为最稳定的金红石型,所以简易地制备锐钛矿型TiO2比较困难.在最佳条件下:以0.15 mol/L的Ti(SO4)2溶液为原料,外加添加剂(关键技术,添加剂/Ti4+摩尔比为4/1)于170℃下水热反应4 h,在玻璃基板上制备TiO2纳米晶体薄膜,SEM、TEM和XRD表征结果说明,生成的TiO2晶体为锐钛矿型.制备的TiO:薄膜平整、密实,厚约2μm,薄膜由大面积的TiO2纳米晶体自组装而成,TiO2纳米晶体呈现八面体结构,平整的三角形表面边长约100～200 nm,晶体长约1 μm.
参考文献
| [1] | Mattsson A;Leideborg M;Larsson K et al.Adsorption and so-lar light decomposition of acetone on anatase TiO2 and niobium doped TiO2 thin films[J].Journal of Physical Chemistry B,2006,110:1210-1220. |
| [2] | Alarco'n H;Boschloo G;Mendoza P et al.Dye-sensitized solar cells based on nanocrystalline TiO2 films surface treated with Al3》 ions:photovoltage and electron transport studies[J].Journal of Physical Chemistry B,2005,109:18483-18490. |
| [3] | Guangshe Li;Liping Li;Juliana Boerio-Goates;Brian F.Woodfield .High Purity Anatase TiO_2 Nanocrystals:Near Room-Temperature Synthesis,Grain Growth Kinetics,and Surface Hydration Chemistry[J].Journal of the American Chemical Society,2005(24):8659-8666. |
| [4] | Hu Y;Yuan CW .Low-temperature preparation of photocatalytic TiO2 thin films from anatase sols[J].Journal of Crystal Growth,2005(3/4):563-568. |
| [5] | Yang, Y;Wu, QY;Guo, YH;Hu, CW;Wang, E .Efficient degradation of dye pollutants on nanoporous polyoxotungstate-anatase composite under visible-light irradiation[J].Journal of Molecular Catalysis. A, Chemical,2005(2):203-212. |
| [6] | Xie YB;Yuan CW;Li XZ .Photocatalytic degradation of X-3B dye by visible light using lanthanide ion modified titanium dioxide hydrosol system[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2005(1):87-94. |
| [7] | Yang M C;Yang T S;Wong M S .Nitrogen-doped titanium ox-ide films as visible light photocatalyst by vapor deposition[J].Thin Solid Films,2004,469/670:1-5. |
| [8] | Suda Y;Kawasaki H;Ueda T .Preparation of high quality ni-trogen doped TiO thin film as a photocatalyst using a pulsed laser deposition method[J].Thin Solid Films,2004,453/454:162-166. |
| [9] | Fox G R;Adair J H;Newnham R E .Effects of pH and H2O up on coprecipitated PbTO3 powder[J].Journal of Materials Science,1990,25:3636-3640. |
| [10] | 吴孟强,陈艾,周旺,徐榕青.水热晶化法合成TiO2晶须[J].硅酸盐学报,2001(06):587-590. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%