以Na2WO4·2H2O和盐酸为原料,采用水热法合成了WO3微晶.通过X射线衍射分析(XRD)、电子扫描显微镜(SEM)、热重-差示扫描量热法(TG-DSC)等表征手段,研究了水热反应温度及煅烧处理对产物的晶体结构和微观形貌的影响.结果表明:水热处理温度从100℃升到160℃时,所得微晶的衍射峰强度逐渐升高,所得样品的结晶度趋于完整,其形貌由片状结构变为自组装的球状结构.光催化结果表明可知随着水热温度的升高,光催化性能先上升后下降,产物的结晶性与其比表面积大小为影响其光催化性能的主要因素.通过对比煅烧前后产物的光催化性能发现六方相WO3结构比正交相WO3·0.33H2O结构具有更好的光催化活性.
参考文献
| [1] | Balazsi C.;Pfeifer J. .Development of tungsten oxide hydrate phases during precipitation, room temperature ripening and hydrothermal treatment[J].Solid state ionics,2002(1/4):353-358. |
| [2] | Jang-Hoon Ha;P. Muralidharan;Do Kyung Kim .Hydrothermal synthesis and characterization of self-assembled h-WO_3 nanowires/nanorods using EDTA salts[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):446-451. |
| [3] | Helena I.S. Nogueira;Ana M.V. Cavaleiro;Joao Rocha;Tito Trindade;Julio D. Pedrosa de Jesus .Synthesis and characterization of tungsten trioxide powders prepared from tungstic acids[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2004(4/5):683-693. |
| [4] | 李二元,王秀峰,伍媛婷,李颖华.纳米氧化钨薄膜的制备及光致变色特性的研究进展[J].稀有金属材料与工程,2009(z1):329-333. |
| [5] | 杨海刚,宋桂林,张基东,王天兴,常方高.WO3薄膜的电致变色与响应时间机理研究[J].人工晶体学报,2011(05):1316-1321. |
| [6] | 傅小明,杨在志,徐艳.水热条件对合成WO3纳米棒形貌和光吸收特性的影响[J].人工晶体学报,2011(01):242-246. |
| [7] | 李慧泉,洪文珊,崔玉民,华林,张文保,陶栋梁.Y2O3掺杂WO3光催化剂的制备及其性能[J].人工晶体学报,2012(04):1092-1096. |
| [8] | 崔玉民,张文保.纳米WO3光催化甲基橙脱色率的研究[J].稀有金属,2006(06):783-788. |
| [9] | 胡栋虎,贺蕴秋,李林江,尹婷,季伶俐,李一鸣.不同晶型WO3·0.33H2O的结构及性能[J].无机化学学报,2011(01):11-18. |
| [10] | 叶爱玲,贺蕴秋,周文明,解庆红,王锐华.WO3·0.33H2O纳米粉体的制备及其光催化性能研究[J].功能材料,2009(01):52-55,59. |
| [11] | Komaba S.;Kato K.;Yashiro H.;Kumagai N. .Hydrothermal synthesis of hexagonal tungsten trioxide from Li2WO4 solution and electrochemical lithium intercalation into the oxide[J].Solid state ionics,2000(1/4):193-197. |
| [12] | Peng, T.;Ke, D.;Xiao, J.;Wang, L.;Hu, J.;Zan, L..Hexagonal phase WO _3 nanorods: Hydrothermal preparation, formation mechanism and its photocatalytic O _2 production under visible-light irradiation[J].Journal of Solid State Chemistry,2012:250-256. |
| [13] | Zhang, X.;Lu, X.;Shen, Y.;Han, J.;Yuan, L.;Gong, L.;Xu, Z.;Bai, X.;Wei, M.;Tong, Y.;Gao, Y.;Chen, J.;Zhou, J.;Wang, Z.L. .Three-dimensional WO_3 nanostructures on carbon paper: Photoelectrochemical property and visible light driven photocatalysis[J].Chemical communications,2011(20):5804-5806. |
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%