球形、花形和线状钒酸铋的可控合成及光催化性能

引用本文: 林雪, 于丽丽, 闫丽娜, 关庆丰, 闫永胜, 赵晗. 球形、花形和线状钒酸铋的可控合成及光催化性能[J]. 物理化学学报, 2013, 29(08): 1771-1777. doi: 10.3866/PKU.WHXB201305131 shu

Citation: LIN Xue, YU Li-Li, Yan Li-Na, GUAN Qing-Feng, Yan Yong-Sheng, ZHAO Han. Controllable Synthesis and Photocatalytic Activity of Spherical, Flowerlike and Threadlike Bismuth Vanadates[J]. Acta Physico-Chimica Sinica, 2013, 29(08): 1771-1777. doi: 10.3866/PKU.WHXB201305131 shu

球形、花形和线状钒酸铋的可控合成及光催化性能

林雪 ^1, ,
于丽丽 ^1, ,
闫丽娜 ^1, ,
关庆丰 ^2, ,
闫永胜 ^3, ,
赵晗 ^1,

基金项目:
环境友好材料制备与应用教育部重点实验室项目和吉林省科技发展计划项目(20130522071JH)资助 (20130522071JH)

摘要:

通过无模板、无助剂的可控水热法, 制备出球形、花形和线状钒酸铋(BiVO₄), 研究了其光学和可见光催化性能. 通过X射线衍射(XRD)和透射电镜(TEM)观测其结构和形貌特征. XRD谱线显示, 所制备的样品为单斜晶体结构. TEM结果表明, 通过控制水热过程的反应参数可以得到不同形貌的纳米粉体. 基于不同条件下制备的样品的微结构分析, 提出了这些不同形貌的形成机制. 紫外-可见漫反射光谱(UV-Vis DRS)表明BiVO₄样品的带隙能约为2.19-2.33 eV. 利用可见光(λ>420 nm)照射下的罗丹明B(RhB)降解实验评价了BiVO₄样品的光催化性能. 结果表明, BiVO₄的光催化活性比商用TiO₂催化剂P25 和掺氮TiO₂ (N-TiO₂)高得多. 所制备的球形BiVO₄光催化效率最高, 经可见光照射180 min, RhB溶液的降解率可达100%. 系统地研究了结构和形貌对不同pH值下制备的BiVO₄样品光催化活性的影响.

关键词:

English

Controllable Synthesis and Photocatalytic Activity of Spherical, Flowerlike and Threadlike Bismuth Vanadates

1.
1 College of Chemistry, Key Laboratory of Preparation and Application of Environmentally Friendly Materials of the Ministry of Education, Jilin Normal University, Siping 136000, Jilin Province, P. R. China;
2 School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu Province, P. R. China;
3 School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu Province, P. R. China
Received Date: 29 January 2013
Available Online: 09 July 2013
Fund Project:
环境友好材料制备与应用教育部重点实验室项目和吉林省科技发展计划项目(20130522071JH)资助

Abstract:

Spherical, flowerlike, and threadlike bismuth vanadates (BiVO₄) were synthesized via a controllable hydrothermal method without using any surfactant or template. The optical and photocatalytic properties of the BiVO₄ samples were investigated. The phase structures of the BiVO₄ samples were observed by X-ray diffraction (XRD), which indicated that the as-prepared samples possessed monoclinic cells. Transmission electron microscope (TEM) observations showed that BiVO₄ crystals with different morphologies were fabricated simply by manipulating the parameters of the hydrothermal reaction. On the basis of the structural analysis of samples obtained under different conditions, a possible mechanism for the formation of these distinct morphologies was proposed. UV-visible diffuse reflectance spectra (UV-Vis DRS) of the samples revealed that the band gaps of the BiVO₄ photocatalysts were about 2.19-2.33 eV. The as-prepared BiVO₄ photocatalysts exhibited higher photocatalytic activities toward the degradation of rhodamine B (RhB) under visible light irradiation (λ>420 nm) than commercial P25 TiO₂ and traditional N-doped TiO₂ (N-TiO₂). Spherical BiVO₄ showed the highest photocatalytic activity of the samples, decolorizing up to 100% of RhB upon visible light irradiation for 180 min. The reason for the different photocatalytic activities of the BiVO₄ samples fabricated at different pH was systematically studied by considering their structure and morphology.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

球形、花形和线状钒酸铋的可控合成及光催化性能

English

Controllable Synthesis and Photocatalytic Activity of Spherical, Flowerlike and Threadlike Bismuth Vanadates

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

球形、花形和线状钒酸铋的可控合成及光催化性能

English

Controllable Synthesis and Photocatalytic Activity of Spherical, Flowerlike and Threadlike Bismuth Vanadates

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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