WC/MMT纳米复合材料制备及其对PNP的电催化活性

doi:10.11949/j.issn.0438-1157.20150779

化工学报 ›› 2015, Vol. 66 ›› Issue (9): 3776-3781.DOI: 10.11949/j.issn.0438-1157.20150779

• 材料化学工程与纳米技术 • 上一篇下一篇

WC/MMT纳米复合材料制备及其对PNP的电催化活性

李国华^1,2, 杨威¹, 佟明兴¹, 郑翔¹

1 浙江工业大学化学工程学院, 浙江杭州 310014;
2 绿色化学合成技术国家重点实验室培育基地, 浙江杭州 310014

收稿日期:2015-06-01 修回日期:2015-06-08 出版日期:2015-09-05 发布日期:2015-09-05
通讯作者: 李国华
基金资助:
国家自然科学基金项目(21173193,21301154);宁波市自然科学基金项目(2014A610116)。

Preparation of WC/MMT nanocomposite and its electrocatalytic activityfor p-nitrophenol

LI Guohua^1,2, YANG Wei¹, TONG Mingxing¹, ZHENG Xiang¹

1 School of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China;
2 State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Hangzhou 310014, Zhejiang, China

Received:2015-06-01 Revised:2015-06-08 Online:2015-09-05 Published:2015-09-05
Supported by:
supported by the National Natural Science Foundation of China (21173193, 21301154) and the Natural Science Foundation of Ningbo City (2014A610116).

摘要/Abstract

摘要：

以剥离后的蒙脱石(MMT)为载体,将浸渍法与原位还原技术相结合制备了碳化钨/蒙脱石(WC/MMT)纳米复合材料。采用X射线衍射、扫描电子显微镜和透射电子显微镜等手段对样品进行了表征。结果表明,剥离后蒙脱石的片层厚度为10～15 nm,层间距增大,边缘发生卷曲;复合材料由碳化钨(WC)、碳化二钨(W₂C)和蒙脱石组成,碳化钨颗粒均匀地分布于蒙脱石外表面。采用循环伏安法测试了样品对对硝基苯酚(PNP)的电化学还原性能,结果表明,WC/MMT纳米复合材料对对硝基苯酚具有良好的电催化活性,且具有较好的稳定性。蒙脱石是碳化钨基复合电催化材料良好的载体。

关键词: 碳化钨, 蒙脱石, 纳米复合材料, 制备, 电催化性能

Abstract:

Tungsten carbide and montmorillonite (MMT) nanocomposite was prepared through combining an impregnation approach with a reduction-carbonization method using exfoliated MMT as a support. The samples were characterized by X-ray diffraction, scanning electron microscope and transmission electron microscope. The results showed that the structure of exfoliated MMT was lamellar. The thickness of exfoliated MMT layer was between 10 nm and 15 nm. The edge of exfoliated MMT layer rolled and the interplane distance of exfoliated MMT were enlarged. The crystal phase of the sample was composed of monotungsten carbide (WC), bitungsten carbide (W₂C) and MMT. The particles of tungsten carbide were distributed on the surface of exfoliated MMT. The electrochemical reduction activity of the nanocomposite for p-nitrophenol (PNP) was tested by cyclic voltammetry (CV) in acidic solution. It was found that WC/MMT nanocomposite was electrocatalytic active to PNP and its electrocatalytic activity was stable. This implied that the exfoliated MMT was one of the excellent composite carriers to improve the electrocatalytic property of WC, which can be used in other catalysts.

Key words: tungsten carbide, montmorillonite, nanocomposite, preparation, electrocatalytic activity

中图分类号:

O646
O643

李国华, 杨威, 佟明兴, 郑翔. WC/MMT纳米复合材料制备及其对PNP的电催化活性[J]. 化工学报, 2015, 66(9): 3776-3781.

LI Guohua, YANG Wei, TONG Mingxing, ZHENG Xiang. Preparation of WC/MMT nanocomposite and its electrocatalytic activityfor p-nitrophenol[J]. CIESC Journal, 2015, 66(9): 3776-3781.

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WC/MMT纳米复合材料制备及其对PNP的电催化活性

Preparation of WC/MMT nanocomposite and its electrocatalytic activityfor p-nitrophenol

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