采用溶胶凝胶-浸渍提拉法在ITO导电玻璃表面制备了纯TiO2薄膜和La掺杂TiO2薄膜,对其进行350℃、450℃、550℃保温2h热处理.利用XRD、SEM、EDS、XPS对样品结构、形貌、成分进行表征,利用电化学工作站对薄膜进行光电流测试,研究了La掺杂以及不同热处理温度对TiO2薄膜结构及光电流的影响.结果表明:La掺杂有细化TiO2晶粒和抑制锐钛矿相向金红石相转变的作用.随热处理温度提高,纯TiO2薄膜与La掺杂TiO2薄膜光电流密度均先增大后减小,450℃热处理后纯Ti02薄膜光电流密度为180 μA·cm-2,此温度下La掺杂TiO2薄膜光电流密度为650 μA·cm-2,是纯TiO2薄膜的3.6倍.
参考文献
[1] | Iwasaki M.;Kawada H.;Tada H.;Ito S.;Hara M..Cobalt ion-doped TiO2 photocatalyst response to visible light[J].Journal of Colloid and Interface Science,20001(1):202-204. |
[2] | 燕宁宁;张莹;龚昌杰;朱忠其;柳清菊.Ce-TiO2光催化剂的制备与性能研究[J].功能材料,2012(01):92-95. |
[3] | 赵清华;全学军;谭怀琴;桑雪梅.La掺杂TiO2光催化剂的制备与表征[J].催化学报,2008(3):269-274. |
[4] | 钟敏;韦之豪;司平占;李红;卫国英;葛洪良;韩高荣.掺铁二氧化钛纳米晶的制备及其光催化性能[J].硅酸盐学报,2010(1):68-73. |
[5] | Kong, M.;Li, Y.;Chen, X.;Tian, T.;Fang, P.;Zheng, F.;Zhao, X..Tuning the relative concentration ratio of bulk defects to surface defects in TiO~2 nanocrystals leads to high photocatalytic efficiency[J].Journal of the American Chemical Society,201141(41):16414-16417. |
[6] | 尹峰;林原;林瑞峰;肖绪瑞.强度调制光电流谱研究TiO2悬浮体系光催化机理[J].物理化学学报,2002(1):21-25. |
[7] | 于华;李新军;郑少健;徐刚.Ni控制掺杂TiO2薄膜的光电化学及光催化活性[J].无机化学学报,2006(6):978-982. |
[8] | Kim CS;Kwon IM;Moon BK;Jeong JH;Choi BC;Kim JH;Choi HY;Yi SS;Yoo DH;Hong KS.Synthesis and particle size effect on the phase transformation of nanocrystalline TiO2[J].Materials science & engineering, C. Biomimetic and supramolecular systems,20075/8(5/8):1343-1346. |
[9] | V. Uvarov;I. Popov.Metrological characterization of X-ray diffraction methods for determination of crystallite size in nano-scale materials[J].Materials Characterization,200710(10):883-891. |
[10] | 崔玉民;范少华;张颖.稀土掺杂TiO2纳米微粒的合成、表征及光催化活性[J].北京科技大学学报,2006(10):956-958. |
[11] | T. Yamaki;T. Umebayashi;T. Sumita;S. Yamamoto;M. Maekawa;A. Kawasuso;H. Itoh.Fluorine-doping in titanium dioxide by ion implantation technique[J].Nuclear Instruments and Methods in Physics Research, Section B. Beam Interactions with Materials and Atoms,20030(0):254-258. |
[12] | 张玉娟;沈嘉年.TiO2光催化纳米薄膜的晶化处理[J].稀有金属材料与工程,2006(1):92-95. |
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%