采用水热法在不同反应时间下制备了钨酸铋(Bi2WO6)碟状结构的光催化剂,对Bi2WO6的晶体结构、组成成分、形貌、光吸收特性和可见光催化活性等进行了表征.结果表明,反应时间影响Bi2WO6样品的形貌.水热反应6h时,Bi2WO6样品处于非晶态,随着反应时间的增加,Bi2WO6由二维盘状结构逐渐堆积成三维碟状结构,水热反应48 h后可形成完整的微米碟.180℃水热反应48 h后制备出的Bi2WO6纳米材料具有较高的羟基自由基生成速率和较强的可见光催化活性,反应时间过长或者过短都不利于Bi2WO6可见光催化性能的提高.同时分析了不同Bi2WO6样品的可见光催化效率存在差异的原因,并且提出了不同反应时间下Bi2WO6材料的微观生长机理.
参考文献
| [1] | Liwu Zhang;Yongfa Zhu .A review of controllable synthesis and enhancement of performances of bismuth tungstate visible-light-driven photocatalysts[J].Catalysis science & technology,2012(4):694-706. |
| [2] | 韦永阁,陈英,张强,王昆,徐蕾.RGO-BiVO4复合材料的制备及其模拟太阳光光催化性能的研究[J].人工晶体学报,2013(06):1192-1198. |
| [3] | 陈渊,杨家添,庞起,周科朝,黄健英.可见光催化剂Ni-BiVO4的水热合成及其光催化性能研究[J].人工晶体学报,2013(06):1230-1236,1246. |
| [4] | 唐洁,展红全,江向平,徐明珠,李小红.不同酸性助剂水热合成钨酸铋的制备及光催化性能研究[J].人工晶体学报,2013(06):1092-1097. |
| [5] | Yupeng Zhang;Linfeng Fei;Xudong Jiang .Engineering Nanostructured Bi_2WO_6-TiO_2 Toward Effective Utilization of Natural Light in Photocatalysis[J].Journal of the American Ceramic Society,2011(12):4157-4161. |
| [6] | Tamar Saison;Nicolas Chemin;Corinne Chaneac .Bi2O3, BiVO4, and Bi2WO6: Impact of Surface Properties on Photocatalytic Activity under Visible Light[J].The journal of physical chemistry, C. Nanomaterials and interfaces,2011(13):5657-5666. |
| [7] | Yiqiao Zhuo;Jianfeng Huang;Liyun Cao;Haibo Ouyang;Jianpeng Wu .Photocatalytic activity of snow-like Bi_2WO_6 microcrystalline for decomposition of Rhodamine B under natural sunlight irradiation[J].Materials Letters,2013(Jan.1):107-110. |
| [8] | Jingjing Xu;Yanhui Ao;Mindong Chen .A simple method for the preparation of Bi_2WO_6-reduced graphene oxide with enhanced photocatalytic activity under visible light irradiation[J].Materials Letters,2013(Feb.1):126-128. |
| [9] | 章剑,章燕,沈玉华,李村,谢安建.花状结构Bi2WO6多孔微球：组装及光催化性能[J].无机化学学报,2012(04):739-744. |
| [10] | Li YY;Liu JP;Huang XT;Li GY .Hydrothermal synthesis of Bi2WO6 uniform hierarchical microspheres[J].Crystal growth & design,2007(7):1350-1355. |
| [11] | 张爱平,张进治.水热法制备不同形貌和结构的BiVO4粉末[J].物理学报,2009(04):2336-2344. |
| [12] | 赵鹏君,吴荣,侯娟,常爱民,关芳,张博.一步水热合成铜纳米颗粒负载二氧化钛复合纳米管及其可见光催化活性[J].物理化学学报,2012(08):1971-1977. |
| [13] | Md. Selim Arif Sher Shah;Kan Zhang;A. Reum Park .Single-step solvothermal synthesis of mesoporous Ag-TiO2-reduced graphene oxide ternary composites with enhanced photocatalytic activity[J].Nanoscale,2013(11):5093-5101. |
| [14] | Xinjun Wang;Linling Chang;Jinrui Wang;Ningning Song;Huanli Liu;Xiaoli Wan .Facile hydrothermal synthesis of Bi_2WO_6 microdiscs with enhanced photocatalytic activity[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2013(Apr.1):685-689. |
| [15] | L.Wan;J.F. Li;J.Y. Feng .Anatase TiO_2 films with 2.2 eV band gap prepared by micro-arc oxidation[J].Materials Science & Engineering, B. Solid-State Materials for Advanced Technology,2007(2/3):216-220. |
| [16] | Xiang, Q.;Yu, J.;Wong, P.K. .Quantitative characterization of hydroxyl radicals produced by various photocatalysts[J].Journal of Colloid and Interface Science,2011(1):163-167. |
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