应用化学 ›› 2022, Vol. 39 ›› Issue (3): 480-488.DOI: 10.19894/j.issn.1000-0518.210180

• 研究论文 • 上一篇    下一篇

一步原位还原法制备WS2@Au量子点复合物及其传感应用

彭红珍1,3,4, 张瑜1,3, 郭琳洁1,3, 宋伟2(), 李晴暖1(), 孟祥英2()   

  1. 1.中国科学院上海应用物理研究所,中国科学院微观界面物理与探测重点实验室,上海 201800
    2.潍坊医学院医学检验学院,潍坊 261053
    3.中国科学院上海高等研究院基础交叉研究中心,上海 201210
    4.中国科学院大学,北京 100049
  • 收稿日期:2021-04-10 接受日期:2021-07-15 出版日期:2022-03-01 发布日期:2022-03-15
  • 通讯作者: 宋伟,李晴暖,孟祥英
  • 基金资助:
    山东省医药卫生科技发展计划项目(202012060616);山东省自然科学基金(ZR2016BL19)

Facile One⁃Step Synthesis of WS2@Au Quantum Dot Composite by in situ Reduction and Its Sensing Application

Hong-Zhen PENG1,3,4, Yu ZHANG1,3, Lin-Jie GUO1,3, Wei SONG2(), Qing-Nuan LI1(), Xiang-Ying MENG2()   

  1. 1.Division of Physical Biology,CAS Key Laboratory of Interfacial Physics and Technology,Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China
    2.School of Medical Laboratory,Weifang Medical University,Weifang 261053,China
    3.The Interdisciplinary Research Center,Shanghai Synchrotron Radiation Facility,Zhangjiang Laboratory,Shanghai Advanced Research Institute,Chinese Academy of Sciences,Shanghai 201210,China
    4.University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2021-04-10 Accepted:2021-07-15 Published:2022-03-01 Online:2022-03-15
  • Contact: Wei SONG,Qing-Nuan LI,Xiang-Ying MENG
  • About author:wysw8103@163.comliqingnuan@sinap.ac.cnmengxiangying85730@126.com
  • Supported by:
    the Medical and Health Science and Technology Development Program of Shandong Province(202012060616);the Natural Science Foundation of Shandong Province(ZR2016BL19)

摘要:

电化学传感器界面改造是提升其检测性能的重要途径。其中,增强电化学传感界面的生物相容性和导电性,是电化学传感器发展遇到的一个重大挑战。本文基于一步原位还原法制备的WS2@Au量子点(WS2@Au QDs),对玻碳电极表面进行功能化,用于氧化还原酶的固定,实现了高性能生物传感的构建。借助WS2@Au QDs良好的生物相容性及导电性特性,WS2@Au QDs有效保护了葡萄糖氧化酶(GOx)的催化活性,同时促了进GOx与电极间的直接电子转移,其电子转移速率常数达到2.25 s-1。基于该传感器对葡萄糖良好的电催化作用,该方法被成功用于葡萄糖的检测,其线性范围为5~50 μmol/L,检测限为1.5 μmol/L,且该传感器具有良好的选择性、重现性和稳定性。WS2@Au QDs在生物传感器的界面改造方面,具有潜在的重要应用前景,其为构建高性能生物传感器奠定了良好的研究基础。

关键词: WS2@Au 量子点, 原位还原, 直接电化学, 葡萄糖氧化酶, 生物传感

Abstract:

The interface modification of electrochemical sensors is an important way to improve their detection performance. Among them, enhancing the biocompatibility and electrical conductivity of the electrochemical sensing interface is a major challenge for the development of electrochemical sensors. In this work, the surface of glassy carbon electrode is functionalized based on WS2@Au quantum dots (WS2@Au QDs) prepared by in situ one-step reduction, which is used to immobilize oxidoreductase, thus realizing the construction of high-performance biosensors. By virtue of the excellent biocompatibility and electrical conductivity of WS2@Au QDs, the WS2@Au QDs can effectively protect the catalytic activity of GOx and promote the direct electron transfer between GOx and the electrode, and the electron transfer rate constant reaches 2.25 s-1. Based on the good electrocatalytic effect of the sensor on glucose, the method has been successfully applied to the detection of glucose, with a linear range of 5~50 μmol/L and a detection limit of 1.5 μmol/L, and the sensor shows good selectivity, reproducibility and stability. These results suggest that the WS2@Au QDs has potential important application prospects in the interface modification of biosensors, which lays a good research foundation for the construction of high-performance biosensors.

Key words: WS2@Au quantum dots, In situ reduction, Direct electrochemistry, Glucose oxidase, Biosensor

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