化工进展 ›› 2017, Vol. 36 ›› Issue (09): 3380-3387.DOI: 10.16085/j.issn.1000-6613.2017-0157

• 材料科学与技术 • 上一篇    下一篇

水热法制备二氧化锰及在过氧化氢传感器中的应用

靳福娅1, 余林1, 蓝邦1,2, 程高1, 孙明1, 郑小颖1   

  1. 1 广东工业大学轻工化工学院, 广东 广州 510006;
    2 广东省梅州市质量计量监督检测所, 广东 梅州 514072
  • 收稿日期:2017-01-22 修回日期:2017-05-15 出版日期:2017-09-05 发布日期:2017-09-05
  • 通讯作者: 余林,教授,主要研究方向为催化新反应、催化新材料、电催化氧还原反应和超级电容器等领域。
  • 作者简介:靳福娅(1992-),女,硕士研究生。E-mail:timegoneby@163.com
  • 基金资助:
    国家自然科学基金(21576054)、广东省科技计划(2014A010106030,2016A010104017,2016B020241003)及广东省质监局科技计划(2017ZZ07)项目。

Preparation of MnO2 nanomaterials in hydrothermal method and applied in hydrogen peroxide sensing

JIN Fuya1, YU Lin1, LAN Bang1,2, CHENG Gao1, SUN Ming1, ZHENG Xiaoying1   

  1. 1 School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, Guangdong, China;
    2 Guangdong Meizhou Quality & Metrology Supervision and Testing Institution, Meizhou 514072, Guangdong, China
  • Received:2017-01-22 Revised:2017-05-15 Online:2017-09-05 Published:2017-09-05

摘要: 以高锰酸钾、硫酸锰、过硫酸钠等为原料,采用水热法合成了一系列二氧化锰(MnO2)催化剂,通过X射线衍射分析(XRD)、扫描电镜(SEM)以及N2吸附-脱附等手段进行了表征。后将一定量的二氧化锰材料与Nafion混合后滴涂于玻碳电极(GCE)表面,构成了一系列新型的过氧化氢传感器。并采用循环伏安法(CV)和计时电流法(I-t)分别对修饰电极进行表征,考察其相应的传感性能。结果表明,海胆状α-MnO2催化剂修饰的玻碳电极对过氧化氢有优异的电催化性能,其灵敏度为26.2μA·L/mmol。H2O2峰电流值在(2×10-6)~(0.14×10-3)mol/L范围内与浓度呈线性关系,最低检出限为0.57×10-6mol/L(S/N=3)。

关键词: 二氧化锰, 水热法, Nafion, 过氧化氢, 电化学传感器

Abstract: A series of manganese dioxide,namely urchin α-MnO2,α-MnO2 nanowires and β-MnO2 nanorods were synthesized using hydrothermal method by changing raw materials such as KMnO4、MnSO4、Na2S2O8,etc. The MnO2 materials were characterized by X-ray diffraction(XRD),scanning electron microscope(SEM),and N2 adsorption-desorption measurements. A novel hydrogen peroxide (H2O2)sensor was fabricated by coating the mixture of Nafion and nanomaterials on a glassy carbon electrode(GCE). The performances of the modified electrode was investigated using cyclic voltammetry(CV)and chronoamperometry current-time response(I-t). The test results indicated that the urchin α-MnO2 nanowires based sensor exhibited the best electro catalytic activity towards the reduction of H2O2 with a sensitivity of 26.2μA·L/mmol. And the reduction peak currents of H2O2 were linear to their concentrations in the range of 2×10-6mol/L to 0.14×10-3mol/L wih a lowest limit of detection of 0.57×10-6mol/L(S/N=3).

Key words: manganese oxide, hydrothermal method, Nafion, hydrogen peroxide (H2O2), electrochemical sensor

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