采用具有锐钛矿晶粒的TiO2溶胶,通过浸渍提拉的方法,在载玻片上低温制备了具有光催化活性的TiO2薄膜.为进一步提高薄膜的光催化活性,采用掺杂了聚苯乙烯磺酸盐的聚乙撑二氧噻吩作为TiO2薄膜的涂膜基底,采用SEM、PL光谱等测试方法考察了该有机半导体基底对TiO2薄膜性能的影响,并就TiO2薄膜厚度对两种基底上薄膜光催化活性的影响及其机理进行了讨论.结果表明:电子从有机半导体向TiO2的迁移使得光生电荷较好地分离,从而增加了表层TiO2的空穴浓度.同时发现合适的TiO2厚度能够有效地提高薄膜的光催化活性.
TiO2 film was prepared on the microscope slide by dip-coating process using the TiO2 sol,which contained anatase crystalline grains.This film had photocatalytic activity directly without an annealing step in a typical sol-gel method.With an attempt to enhance the photocatalytic activity of the TiO2 film,poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonic acid)(PEDT/PSS,an organic semiconductor)film was used as a substrate of the TiO2 film.To understand the beneficial effect of PEDT/PSS to the photocatalytic activity of the TiO2,scanning electron microscopy(SEM)and photoluminescence(PL)emission spectra were adopted.The effect of the thickness of TiO2 film on the photocatalytic activities of the two kinds of films and their photocatalytic reaction mechanisms were also discussed.The results show that the PEDT/PSS layer induces a better charge separation due to electron transfer from TiO2 layer to PEDT/PSS layer,and thus increases the amount of the hole in the superficial TiO2 layer.The appropriate thickness of TiO2 layer is effective for improving the photocatalytic activity of TiO2.
参考文献
| [1] | Trapalis CC.;Keivanidis P.;Kordas G.;Zaharescu M.;Crisan M.;Szatvanyi A.;Gartner M. .TiO2(Fe3+) nanostructured thin films with antibacterial properties[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,2003(1/2):186-190. |
| [2] | Sopyan I;Watanabe M;Murasawa S et al.[J].Journal of Photochemistry and Photobiology A:Chemistry,1996,98(1-2):79. |
| [3] | 高基伟,丁新更,黄顺余,杨辉.热处理温度对TiO2结构和光学性能的影响[J].稀有金属材料与工程,2004(z1):52-54. |
| [4] | Ding Xingeng;Yang Hui .[J].Key Engineering Materials,2005,280-283(01):801. |
| [5] | 丁新更;杨辉 .[J].稀有金属材料与工程,2005,34(z3):72. |
| [6] | Choi W;Fermin A;Hoffmann M R .[J].Journal of Physical Chemistry,1994,98(51):13669. |
| [7] | Lee J;Choi W .[J].Environmental Science and Technology,2004,38(14):4026. |
| [8] | Tennakone K;Bandara J .[J].Applied Catalysis A:General,2001,208(1-2):335. |
| [9] | Song K Y;Park M K;Kwon Y T et al.[J].CHEMISTRY OF MATERIALS,2001,13(07):2349. |
| [10] | Pal B;Sharon M;Nogami G .[J].Materials Chemistry and Physics,1999,59(03):254. |
| [11] | Wang C;Zhao J C;Wang X M et al.[J].Applied Catalysis B:Environmental,2002,39(03):269. |
| [12] | Murakoshi K.;Wada Y.;Yanagida S.;Kogure R. .Fabrication of solid-state dye-sensitized TiO2 solar cells combined with polypyrrole[J].Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion,1998(1/2):113-125. |
| [13] | Rammelt U;Hebestreit N;Fikus A et al.[J].Electrochimica Acta,2001,46(15):2363. |
| [14] | Hao Y;Yang M;Yu C et al.[J].Solar Energy Materials and Solar Cells,1998,56(01):75. |
| [15] | 杨辉,申乾宏,高基伟.TiO2-PEDT/PSS双层复合膜的制备及其光催化性能[J].催化学报,2005(10):839-841. |
| [16] | Grunes LA .[J].Physical Review B:Condensed Matter,1983,27:2111. |
| [17] | Babonneau F;Docuff S;Leaustic A et al.[J].Inorganic Chemistry,1988,27:3166. |
| [18] | Kim D S;Park Y S .[J].Chemical Engineering Journal,2006,116(02):133. |
| [19] | Kudrawiec R;Podhorodecki A;Mirowska N et al.[J].Materials Science and Engineering B:Solid State Materials for Advanced Technology,2003,105(1-3):53. |
| [20] | Kawahara T;Konishi Y;Tada H et al.[J].Langmuir,2001,17(23):7442. |
| [21] | Nasr C;Hotchandani S;Kim W Y et al.[J].Journal of Physical Chemistry B,1997,101(38):7480. |
| [22] | Zhang X;Cao Y;Kan S et al.[J].Thin Solid Films,1998,327-329:568. |
| [23] | Nasr C;Kamat P V;Hotchandani S .[J].Journal of Physical Chemistry B,1998,102(49):10047. |
| [24] | Hoffmann M R;Martin S T;Choi W et al.[J].Chemical Reviews,1995,95(01):69. |
| [25] | Fox M A;Dulay M T .[J].Chemical Reviews,1993,93(01):341. |
| [26] | Linsebigler A L;Lu G Q;Yates J T .[J].Chemical Reviews,1995,95(03):735. |
| [27] | Hitchman M L;Tian F .[J].Journal of Electroanalytical Chemistry,2002,538-539:165. |
| [28] | Butterfield I M;Christensen P A;Hamnett A et al.[J].Journal of Applied Electrochemistry,1997,27(04):385. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%