以碘酸钾为碘源,钛酸丁酯为钛源,采用溶胶-凝胶法制备碘掺杂TiO2纳米粉体,采用旋涂法制成以ITO导电玻璃为基底的碘掺杂TiO2薄膜电极,并经300～600℃退火处理。采用XRD、XPS和紫外-可见吸收光谱等对样品微观结构、化学成分和光学特性进行表征,并对碘掺杂薄膜电极和纯TiO2薄膜电极的光电化学性能进行测定比较。结果显示少量碘掺入到TiO2,但经碘掺杂的TiO2紫外-可见光吸收限明显红移到可见光区（450～600nm之间）,碘掺杂TiO2薄膜电极经适当温度处理的光响应性比纯TiO2得到明显改善。
I-doped TiO2 nano-size powder was synthesized using sol-gel method,I-doped TiO2/ITO was prepared by spin-coating method,and annealed under the temperatures of 300-600℃.The microstructure,chemical composition and optical and of as-formed films were characterized by X-ray diffraction（XRD）,X-ray photoelectron spectroscopy（XPS）,and UV-Vis absorbance spectra.The photoelectrochemical property was tested by amperometric i-t curves of transient photocurrent generated under Xe light irradiation.The results showed that the absorbance edges of I-doped TiO2 were red-shifted to visible zones of 450-600nm and exhibited a noticeable photoelectrochemical property.
参考文献
| [1] | Xiaobo Chen;Samuel S. Mao .Titanium Dioxide Nanomaterials: Synthesis, Properties, Modifications, and Applications[J].Chemical Reviews,2007(7):2891-2959. |
| [2] | Sato S;Nakamura R;Abe S .Visible-light sensitization of TiO2 photocatalysts by wet-method N doping[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2005(1/2):131-137. |
| [3] | Napoli, F;Chiesa, M;Livraghi, S;Giamello, E;Agnoli, S;Granozzi, G;Pacchioni, G;Di Valentin, C .The nitrogen photoactive centre in N-doped titanium dioxide formed via interaction of N atoms with the solid. Nature and energy level of the species[J].Chemical Physics Letters,2009(1/3):135-138. |
| [4] | Su WY;Zhang YF;Li ZH;Wu L;Wang XX;Li JQ;Fu XZ .Multivalency iodine doped TiO2: Preparation, characterization, theoretical studies, and visible-light photocatalysis[J].Langmuir: The ACS Journal of Surfaces and Colloids,2008(7):3422-3428. |
| [5] | Gang Liu;Chenghua Sum;Xiaoxia Yan .Iodine doped anatase TiO2 photocatalyst with ultra-long visible light response: correlation between geometric/electronic structures and mechanisms[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2009(18):2822-2829. |
| [6] | Xiaoting Hong;Zhengpeng Wang;Weimin Cai;Feng Lu;Jun Zhang;Yanzhu Yang;Na Ma;Yingjun Liu .Visible-Light-Activated Nanoparticle Photocatalyst of Iodine-Doped Titanium Dioxide[J].Chemistry of Materials,2005(6):1548-1552. |
| [7] | Michael R. Hoffmann;Scot T. Martin;Wonyong Choi;Detlef W. Bahnemann .Environmental Applications of Semiconductor Photocatalysis[J].Chemical Reviews,1995(1):69-96. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%