A novel nonenzymatic electrochemical sensor based on 3D flower-like Ni₇S₆ for hydrogen peroxide and glucose

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• 作者：Wenqin WuAuthor Vitae ; Yibin LiAuthor Vitae ; Jiayi JinAuthor Vitae ; Huimin Wu ; ^{whm267@hubu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; ^{whm267@126.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Shengfu WangAuthor Vitae ; Qinghua XiaAuthor Vitae
• 关键词：Three-dimensional flower-like Ni7S6 ; Non-enzymatic electrochemical sensor ; Hydrogen peroxide ; Glucose
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：232
• 期：Complete
• 页码：633-641
• 全文大小：4074 K

文摘

In this paper, three-dimensional flower-like Ni₇S₆ was successfully synthesized by a facile one-pot hydrothermal method. The prepared materials were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and electrochemical testing. Electrochemical measurements indicated that the three-dimensional flower-like Ni₇S₆ exhibited excellent electrocatalytic activity towards hydrogen peroxide and glucose. The sensor based on Ni₇S₆ performed amperometric sensing of hydrogen peroxide in a wide linear range from 0.005 mM to 20.5 mM with a low detection limit of 0.15 μM (signal to noise ratio of 3) and high sensitivity of 37.77 μA mM⁻¹ cm⁻². Meanwhile, the sensor also showed a linear response range of glucose from 0.005 mM to 3.7 mM, with high sensitivity of 271.80 μA mM⁻¹ cm⁻² and low detection limit of 0.15 μM.