以TiCl4为钛前驱体,氨水为沉淀剂,氯化铁为掺杂离子给体,采用化学沉淀法,制备了纯的与铁掺杂的TiO2纳米光催化剂.采用XRD、差热-热重等分析方法对产物进行了表征.通过苯酚水溶液的光催化降解实验研究了样品的光催化性能,考察了Fe3+掺杂量、苯酚溶液的pH值对光催化活性的影响.结果表明:Fe3+掺杂抑制了晶粒长大,细化了晶粒.Fe3+取代晶格中Ti4+的位置或进入间隙位置,引起晶格畸变.适量的Fe3+掺杂能减少光生电子与空穴的复合,提高光催化剂的光催化性能.在本实验条件下,Fe3+掺杂量为0.1 mol%,苯酚溶液的pH为9时,纳米TiO2具有最佳的光催化性能,在20 W 紫外灯照射下降解16 h,降解率达到89.3%.
参考文献
| [1] | 刘艳敏,张雪景,刘敬泽,张艳峰,魏雨.水热法制备硅掺杂纳米TiO_2的光催化性能[J].人工晶体学报,2009(06):1399-1403. |
| [2] | Tennakone K;Wijayantha KGU .Photocatalysis of CFC degradation by titanium dioxide[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2005(1):9-12. |
| [3] | Wang R;Hashimoto K;Fujishima A et al.Light-Induced Amphiphilic Surfaces[J].Nature,1997,388:431-432. |
| [4] | Veronica V;Helen T;Rose A et al.Effects of Fe3+ and Ag+ Ions on the Photocatalytic Degradation of Sucrose in Water[J].Catalysis Today,2001,68:201-208. |
| [5] | Zhou MH;Yu JG;Cheng B;Yu HG .Preparation and photocatalytic activity of Fe-doped mesoporous titanium dioxide nanocrystalline photocatalysts[J].Materials Chemistry and Physics,2005(1):159-163. |
| [6] | Minghua Zhou;Jiaguo Yu;Bei Cheng .Effects of Fe-doping on the photocatalytic activity of mesoporous TiO_2 powders prepared by an ultrasonic method[J].Journal of hazardous materials,2006(3):1838-1847. |
| [7] | Jiaguo Yu;Quanjun Xiang;Minghua Zhou .Preparation, characterization and visible-light-driven photocatalytic activity of Fe-doped titania nanorods and first-principles study for electronic structures[J].Applied Catalysis. B, Environmental,2009(3/4):595-602. |
| [8] | Yuan ZH.;Jia JH.;Zhang LD. .Influence of co-doping of Zn(II) plus Fe(III) on the photocatalytic activity of TiO2 for phenol degradation[J].Materials Chemistry and Physics,2002(2/3):323-326. |
| [9] | Wu J C S;Chen C H .A Visible Light Response Vanadium Dotal Titania Nanocatalyst by Sol-gel Method[J].Journal of Photochemistry and Photobiology A:Chemistry,2004,163:509-515. |
| [10] | 李明利,徐明霞,庞学满,方海波.可见光活性负载型Fe2O3/TiO2光催化剂的制备[J].硅酸盐学报,2006(09):1147-1150. |
| [11] | Zhu JF;Chen F;Zhang JL;Chen HJ;Anpo M .Fe3+-TiO2 photocatalysts prepared by combining sol-gel method with hydrothermal treatment and their characterization[J].Journal of Photochemistry and Photobiology, A. Chemistry,2006(1/2):196-204. |
| [12] | 吴玉程,宋林云,李云,李勇,李广海,郑治祥.Ce掺杂TiO2纳米粉体的制备及其光催化性能研究[J].人工晶体学报,2008(02):427-430. |
| [13] | 曾令可,税安泽,刘平安,王慧,盛文彦.离子掺杂对纳米二氧化钛粒径的影响[J].人工晶体学报,2007(02):428-432. |
| [14] | 石建稳,郑经堂,陈姣霞,赵玉翠.掺Fe3+纳米TiO2晶体结构及光催化性能研究[J].硅酸盐通报,2007(05):943-947. |
| [15] | O. Carp;C. L. Huisman;A. Reller .Photoinduced reactivity of titanium dioxide[J].Progress in Solid State Chemistry,2004(1/2):33-177. |
| [16] | Ohtani B;Ogawa Y;Nishimoto S I .Photocatalytic Activity of Amorphousanatase Mixture of Titanium(IV) Oxide Particles Suspended in Aqueous Solutions[J].Journal of Physical Chemistry B,1997,101:3746-3752. |
| [17] | Yu JG;Xiong JF;Cheng B;Yu Y;Wang JB .Hydrothermal preparation and visible-light photocatalytic activity of Bi2WO6 powders[J].International Journal of Quantum Chemistry,2005(6):1968-1972. |
| [18] | 颜晓莉,史惠祥,雷乐成,汪大翚.负载型二氧化钛光电催化降解苯酚废水的反应动力学[J].化工学报,2004(03):426-433. |
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%