微波水热合成Zn2GeO4纳米带及其光催化活性

doi:10.3866/PKU.WHXB201306213

物理化学学报 >> 2013, Vol. 29 >> Issue (09): 2062-2068.doi: 10.3866/PKU.WHXB201306213

材料物理化学上一篇

微波水热合成Zn₂GeO₄纳米带及其光催化活性

杜书青, 袁宇峰, 涂伟霞

北京化工大学化学工程学院, 有机无机复合材料国家重点实验室, 北京 100029

收稿日期:2013-04-26 修回日期:2013-06-18 发布日期:2013-08-28
通讯作者: 涂伟霞 E-mail:tuwx@mail.buct.edu.cn
基金资助:
国家自然科学基金(21106006)资助项目

Microwave-Hydrothermal Synthesis and Photocatalytic Activity of Zn₂GeO₄ Nanoribbons

DU Shu-Qing, YUAN Yu-Feng, TU Wei-Xia

State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China

Received:2013-04-26 Revised:2013-06-18 Published:2013-08-28
Contact: TU Wei-Xia E-mail:tuwx@mail.buct.edu.cn
Supported by:
The project was supported by the National Natural Science Foundation of China (21106006).

摘要/Abstract

摘要：

采用微波水热法快速合成Zn₂GeO₄纳米带, 研究反应温度、模板剂、原料用量等因素对晶体生长的影响, 并优化其合成条件. 用场发射扫描电镜(FE-SEM)、X射线衍射(XRD)光谱和紫外-可见漫反射吸收光谱(UV-Vis RDS)等手段分析产物的形貌、结构和组成, 考察合成的Zn₂GeO₄在甲基橙光催化降解反应中的性能. 研究结果表明: 微波水热条件下, 以摩尔比为2:1的乙酸锌和氧化锗为原料, 在160℃反应20 min可合成分散均匀的Zn₂GeO₄纳米带, 宽约100 nm, 长为几十微米. 与常规水热法相比,微波水热法合成的Zn₂GeO₄纳米带的本征缺陷减少, 光致发光(PL) 光谱降低,比表面积增大50.7%,光催化活性提高54.7%.

关键词: 微波水热合成, Zn₂GeO₄, 纳米带, 光催化剂, 有机物降解

Abstract:

Zn₂GeO₄ nanoribbons were synthesized via a microwave-hydrothermal method. The effects of reaction factors, such as reaction temperature, amount of reactants and template, were investigated and optimized for the formation of Zn₂GeO₄ nanoribbons. The products were characterized by various techniques including field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS). Photocatalytic activities of the synthesized Zn₂GeO₄ nanostructures were evaluated for the degradation of aqueous methyl orange. Experimental results indicated that Zn₂GeO₄ nanoribbons can be synthesized from Zn(CH₃COO)₂ and GeO₂ (molar ratio 2: 1) under microwave irradiation at 160℃ for 20 min. The nanoribbons have uniformsizes with widths of 100 nm and are tens of micrometers in length. Compared with conventional hydrothermal methods, Zn₂GeO₄ nanoribbons from microwave-hydrothermal synthesis have less native defects, lower PL spectra, 50.7% larger specific surface area, and 54.7% higher photocatalytic activity.

Key words: Microwave-hydrothermal synthesis, Zn₂GeO₄, Nanoribbon, Photocatalyst, Degradation of organics

MSC2000:

O643

杜书青, 袁宇峰, 涂伟霞. 微波水热合成Zn₂GeO₄纳米带及其光催化活性[J]. 物理化学学报, 2013, 29(09): 2062-2068.

DU Shu-Qing, YUAN Yu-Feng, TU Wei-Xia. Microwave-Hydrothermal Synthesis and Photocatalytic Activity of Zn₂GeO₄ Nanoribbons[J]. Acta Phys. -Chim. Sin., 2013, 29(09): 2062-2068.

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微波水热合成Zn₂GeO₄纳米带及其光催化活性

Microwave-Hydrothermal Synthesis and Photocatalytic Activity of Zn₂GeO₄ Nanoribbons

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