Fe3+掺杂三维分级纳米Bi2WO6的合成及其光催化活性增强机理

引用本文: 王丹军, 岳林林, 郭莉, 张洁, 付峰, 薛岗林. Fe³⁺掺杂三维分级纳米Bi₂WO₆的合成及其光催化活性增强机理[J]. 无机化学学报, 2014, 30(4): 961-968. doi: 10.11862/CJIC.2014.137 shu

Citation: WANG Dan-Jun, YUE Lin-Lin, GUO Li, ZHANG Jie, FU Feng, XUE Gang-Lin. Synthesis and Enhanced Photocatalytic Mechanism of Fe³⁺ Doped Three-Dimensional Bi₂WO₆ Hierarchical Nanoarchitectures[J]. Chinese Journal of Inorganic Chemistry, 2014, 30(4): 961-968. doi: 10.11862/CJIC.2014.137 shu

Fe³⁺掺杂三维分级纳米Bi₂WO₆的合成及其光催化活性增强机理

王丹军 ^{1,2,
,} ,
岳林林 ^1, ,
郭莉 ^1, ,
张洁 ^1, ,
付峰 ^1, ,
薛岗林 ^2,

通讯作者: 王丹军 wangdj761118@163.com

基金项目:
国家自然科学基金(No.20973133,21073106)；陕西省科技厅工业攻关项目(No.2013K11-08)；陕西省科技厅统筹项目(No.2012KG03-16)陕西省教育厅科研基金(No.13JK0669)；陕西省化学反应工程重点实验室专项科研基金(No.12JS117)；延安市工业攻关项目(No.2011kg-13)；延安大学重点项目(No.YD22013-07)资助。 (No.20973133,21073106)；陕西省科技厅工业攻关项目(No.2013K11-08)；陕西省科技厅统筹项目(No.2012KG03-16)陕西省教育厅科研基金(No.13JK0669)；陕西省化学反应工程重点实验室专项科研基金(No.12JS117)；延安市工业攻关项目(No.2011kg-13)；延安大学重点项目(No.YD22013-07)

摘要: 利用水热法合成了Fe³⁺掺杂的三维分级纳米Bi₂WO₆,借助X射线衍射(XRD)、场发射扫描电镜(FE-SEM)、透射电镜(HRTEM)、能谱(EDS)、紫外可见漫反射(UV-Vis-DRS)等测试手段对所得样品的相组成、形貌和谱学特征进行了表征。选择罗丹明B为模型污染物研究所得样品在可见光下的催化活性。结果表明,Fe³⁺掺杂Bi₂WO₆为新颖的分级纳米结构,且Fe³⁺掺杂能有效提高Bi₂WO₆的光催化活性,Fe³⁺掺杂量对Bi₂WO₆活性的影响显著；实验结果还表明,所得Fe³⁺掺杂Bi₂WO₆催化剂的稳定性较好,易于回收。此外,还对Fe³⁺掺杂Bi₂WO₆的光催化活性增强机理进行了研究,缺电子的Fe³⁺作为电子捕获中心有利于促进光生电子-空穴对的分离,从而提高Bi₂WO₆的光催化活性。

关键词:

光催化;三维分级Bi₂WO₆;Fe³⁺掺杂;活性增强机理

English

Synthesis and Enhanced Photocatalytic Mechanism of Fe³⁺ Doped Three-Dimensional Bi₂WO₆ Hierarchical Nanoarchitectures

1.
1 College of Chemistry &Chemical Engineering, Yan'an University, Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan'an, Shaanxi 716000, China;

Corresponding author: 王丹军 wangdj761118@163.com

Received Date: 11 October 2013
Fund Project:
国家自然科学基金(No.20973133,21073106)；陕西省科技厅工业攻关项目(No.2013K11-08)；陕西省科技厅统筹项目(No.2012KG03-16)陕西省教育厅科研基金(No.13JK0669)；陕西省化学反应工程重点实验室专项科研基金(No.12JS117)；延安市工业攻关项目(No.2011kg-13)；延安大学重点项目(No.YD22013-07)资助。

Abstract: Fe³⁺ doped three-dimensional Bi₂WO₆ hierarchical nanoarchitectures have been synthesized via a hydr-othermal process. XRD, FE-SEM, HRTEM, EDS and UV-Vis-DRS techniques were employed to characterize the phase composition, morphology and spectrum properties of the as-synthesized samples. Rhodamine Bwas selected as a model pollutant to investigate the photocatalytic activity of the as-synthesized sample under visible-light. The results indicate that Fe³⁺ doped Bi₂WO₆ exhibits a novel hierarchical nanoarchitectures, and Fe³⁺ doping can enhance the photocatalytic activity of Bi₂WO₆ photocatalyst, the amount of Fe³⁺ doping has a serious effect on the photocatalytic activity of Bi₂WO₆ photocatalyst. The results also reveal that Fe³⁺ doped Bi₂WO₆ nanoarchitecture with high stability is easy to be recycled. Furthermore, the mechanism for the enhancement of the photocatalytic activity was also investigated. The doped electron deficient Fe³⁺ ions could act as electron traps and facilitate the separation of photogenerated electron-hole pairs, thus improve the photocatalytic efficiency.

Key words:

photocatalysis;3D hierarchical Bi₂WO₆;Fe³⁺ doping;photocatalytic activity enhancement mechanism

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沈阳化工大学材料科学与工程学院沈阳 110142

Fe³⁺掺杂三维分级纳米Bi₂WO₆的合成及其光催化活性增强机理

通讯作者: 王丹军 wangdj761118@163.com

English

Synthesis and Enhanced Photocatalytic Mechanism of Fe³⁺ Doped Three-Dimensional Bi₂WO₆ Hierarchical Nanoarchitectures

Corresponding author: 王丹军 wangdj761118@163.com

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