Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 27    No. 5    May 2017

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Hydrothermal synthesis and electrochemical sensing properties of copper vanadate nanocrystals with controlled morphologies
Gui-hong HAN1, Shu-zhen YANG1, Yan-fang HUANG1, Jing YANG2, Wen-cui CHAI1, Rui ZHANG2, De-liang CHEN2

1. School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China;
2. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, China

Abstract:Morphology-controlled synthesis of copper vanadate nanocrystals is of great significance in electrochemical sensing applications. A facile hydrothermal process for synthesizing copper vanadate nanocrystals with various morphologies (e.g., nanoparticles, nanobelts and nanoflowers) was reported. Phase, morphology and electrochemical performance of the as-synthesized copper vanadate nanocrystals were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and cyclic-voltammogram (CV) techniques. The results revealed that the morphologies of the Cu3V2O7(OH)2·2H2O (CVOH) nanocrystals could be controlled by changing copper salts, surfactants and pH values. The CVOH samples showed enhanced electrochemical response to ascorbic acid. Comparatively, the CVOH nanobelts had the higher electrochemical sensing performance than those of CVOH nanoparticles and nanoflowers. The CVOH-nanobelts-modified GCEs had a linear relationship between the peak currents in their CVs and ascorbic acid concentration. The CVOH nanocrystals can be used as potential electrochemical active materials for the determination of ascorbic acid.

 

Key words: copper vanadate nanocrystals; hydrothermal synthesis; electrochemical sensors; ascorbic acid

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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