以氟化铵为氟源,采用水热法制得氟掺杂TiO_2(FTO)溶胶,并通过浸渍提拉法在低温下制备了FTO薄膜.其中在120℃下水热处理10h所得的TiO_2溶胶制备的薄膜均匀透明,具有较高的光催化活性.氟掺杂后的TiO_2晶粒尺寸并未发生明显变化,但薄膜的光催化活性显著升高.F/Ti摩尔比为0.01时,FTO薄膜的光催化活性最高,比TiO_2薄膜的活性升高了23%.X射线光电子能谱结果表明,氟掺杂TiO_2中的氟离子存在晶格取代掺杂和表面化学吸附两种形式.这两种氟离子的共同作用是FTO薄膜光催化活性升高的主要原因.
F-doped TiO_2 (FTO) sol was prepared using NH4F as the fluorine precursor by a hydrothermal method. FTO thin film was then prepared via dip-coating. The TiO_2 thin film prepared from the TiO_2 sol that was hydrotherrnally treated at 120 ℃ for 10 h had preferable transparence and high photocatalytic activity. F doping did not significantly change the grain size of TiO_2 but greatly enhanced the photo-catalytic activity of the TiO_2 film. The optimal doping concentration of F corresponded to F/Ti molar ratio of 0.01. The photocatalytic activ-ity of the FTO thin film was 23% higher than that of TiO_2 thin film. X-ray photoelectron spectroscopy results showed that there were two forms of F element in the FTO thin film: surface chemically adsorbed F and substituent lattice F. Both surface adsorbed F and substituent lattice F played a role in the photocatalytic activity enhancement of the FTO thin film.
参考文献
[1] | 张长远,何斌,张金龙.二氧化钛功能薄膜研究发展与应用[J].感光科学与光化学,2004(01):66-77. |
[2] | Ge L;Xu M X;Sun M;Fang H B .[J].Materials Research Bulletin,2006,41:1596. |
[3] | Yuan Zh F;Zhang J L;Li B;Li J Q .[J].Thin Solid Films,2007,515:7091. |
[4] | LuCH;Hu C Y;Wu C H .[J].Journal of Hazardous Materials,2008,159:636. |
[5] | 张金龙;陈锋;何斌.光催化[M].上海:华东理工大学出版社,2004:166. |
[6] | 鲍兴旺,张金龙,梁学海,黄家祯,张利中.二氧化钛薄膜的低温制备及其性能表征[J].物理化学学报,2005(01):69-73. |
[7] | 燕姗姗,吴连弟,陈锋,张金龙.双晶型TiO2薄膜的低温制备及表征[J].物理化学学报,2007(03):414-418. |
[8] | 张永彬,赵景畅,莫威,吴兴惠.TiO2薄膜的制备及光催化性能研究[J].功能材料,2001(03):310-311,314. |
[9] | 黄冬根,廖世军,党志.氟掺杂锐钛矿型TiO2溶胶的制备、表征及催化性能[J].化学学报,2006(17):1805-1811. |
[10] | Park H;Choi W .[J].Journal of Physical Chemistry B,2004,108:4086. |
[11] | Minero C.;Maurino V.;Pelizzetti E.;Mariella G. .Photocatalytic transformation of organic compounds in the presence of inorganic anions. 1. Hydroxyl-mediated and direct electron-transfer reactions of phenol on a titanium dioxide-fluoride system[J].Langmuir: The ACS Journal of Surfaces and Colloids,2000(6):2632-2641. |
[12] | Minero C.;Maurino V.;Vione D.;Pelizzetti E.;Mariella G. .Photocatalytic transformation of organic compounds in the presence of inorganic ions. 2. Competitive reactions of phenol and alcohols an a titanium dioxide-fluoride system[J].Langmuir: The ACS Journal of Surfaces and Colloids,2000(23):8964-8972. |
[13] | Chen Y M;Chert F;Zhang J L .[J].Applied Surface Science,2009,255:6290. |
[14] | Yu JC.;Yu JU.;Ho WK.;Jiang ZT.;Zhang LH. .Effects of F- doping on the photocatalytic activity and microstructures of nanocrystalline TiO2 powders[J].Chemistry of Materials,2002(9):3808-3816. |
[15] | Hattori A;Tada H .[J].Journal of Sol-Gel Science and Technology,2001,22:47. |
[16] | Li D;Haneda H;Labhsetwar NK;Hishita S;Ohashi N .Visible-light-driven photocatalysis on fluorine-doped TIO2 powders by the creation of surface oxygen vacancies[J].Chemical Physics Letters,2005(4-6):579-584. |
[17] | Xu, JJ;Ao, YH;Fu, DG;Yuan, CW .Low-temperature preparation of F-doped TiO2 film and its photocatalytic activity under solar light[J].Applied Surface Science,2008(10):3033-3038. |
[18] | Zhou J K;Lit L;Yu J Q;Li H L Guo P Z Sun H Zhao X S .[J].Journal of Physical Chemistry C,2008,112:5316. |
[19] | Weng, CC;Hsu, KF;Wei, KH .Synthesis of arrayed, TiO2 needlelike nanostructures via a polystyrene-block-poly(4-vinylpyridine) diblock copolymer template[J].Chemistry of Materials,2004(21):4080-4086. |
[20] | Cheng H;Ma J;Zhao Z;Qi L .[J].Chemistry of Materials,1995,7:663. |
[21] | Yamabi S.;Imai H. .Crystal phase control for titanium dioxide films by direct deposition in aqueous solutions[J].Chemistry of Materials,2002(2):609-614. |
[22] | Zhang H Z;Banfield J F .[J].Journal of Physical Chemistry B,2000,104:3481. |
[23] | Yamaki T;Umebayashi T;Sumita T;Yamamoto S Maekawa M Kawasuso A Itoh H .[J].Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms,2003,206:254. |
[24] | Pan JH;Zhang XW;Du AJ;Sun DD;Leckie JO .Self-etching reconstruction of hierarchically mesoporous F-TiO2 hollow microspherical photocatalyst for concurrent membrane water Purifications[J].Journal of the American Chemical Society,2008(34):11256-11257. |
[25] | Tang, JW;Quan, HD;Ye, JH .Photocatalytic properties and photoinduced hydrophilicity of surface-fluorinated TiO2[J].Chemistry of Materials,2007(26):116-122. |
[26] | Dong X;Tao J;Li Y Y;Zhu H .[J].Applied Surface Science,2009,255:7183. |
[27] | Sanjines R;Tang H;Berge H;Gozzo F Margaritondo G Levy F .[J].dAppl Phys,1994,75:2945. |
[28] | 李宗威,朱永法.TiO2纳米粒子的表面修饰研究[J].化学学报,2003(09):1484-1487. |
[29] | Kim H;Choi W .Effects of surface fluorination of TiO2 on photocatalytic oxidation of gaseous acetaldehyde[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2007(3/4):127-132. |
[30] | Park J S;Choi W .[J].Langmuir,2004,20:11523. |
- 下载量()
- 访问量()
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%