高等学校化学学报 ›› 2016, Vol. 37 ›› Issue (3): 448.doi: 10.7503/cjcu20150793

• 分析化学 • 上一篇    下一篇

基于层状二硫化钼纳米片比色检测亚锡离子

胡杰1, 王勇1(), 倪永年1,2()   

  1. 1. 南昌大学化学学院, 南昌 330031
    2. 南昌大学食品科学与技术国家重点实验室, 南昌 330047
  • 收稿日期:2015-10-14 出版日期:2016-03-10 发布日期:2016-01-30
  • 基金资助:
    国家自然科学基金(批准号: 21305061)、 江西省自然科学基金(批准号: 20151BAB213014, 20151BAB203021)和南昌大学食品科学与技术国家重点实验室基金(批准号: SKLF-ZZB201303)资助

Colorimetric Detection of Tin(Ⅱ) Ions Based on Layered Molybdenum Disulfide Nanosheets

HU Jie1, WANG Yong1,*(), NI Yongnian1,2,*()   

  1. 1. College of Chemistry, Nanchang University, Nanchang 330031, China
    2. State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
  • Received:2015-10-14 Online:2016-03-10 Published:2016-01-30
  • Contact: WANG Yong,NI Yongnian E-mail:wangyong@ncu.edu.cn;ynni@ncu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.21305061), the Natural Science Foundation of Jiangxi Province, China(Nos.20151BAB213014, 20151BAB203021) and the State Key Laboratory of Food Science and Technology of Nanchang University of China(No;SKLF-ZZB-201303)

摘要:

在醋酸/醋酸钠缓冲溶液(pH=4.5)中, 亚锡离子对层状二硫化钼(MoS2)纳米片催化过氧化氢(H2O2)氧化邻苯二胺(OPD)的显色反应有很强的抑制作用, 据此构建了一种检测亚锡离子的比色传感器. 实验结果表明, 与不加MoS2纳米片的OPD/H2O2比色传感体系相比, MoS2/OPD/H2O2体系检测亚锡离子的灵敏度显著提高, 线性范围变宽. 在优化的条件下, MoS2/OPD/H2O2传感体系检测亚锡离子的线性范围为0.02~3.0 μmol/L, 检出限为8 nmol/L (S/N=3). 该传感体系对检测亚锡离子具有高的选择性, 可用于湖水中亚锡离子的检测.

关键词: 层状二硫化钼纳米片, 亚锡离子, 邻苯二胺, 比色传感器

Abstract:

In acetate/sodium acetate buffer(pH=4.5), tin(Ⅱ) ion displayed strong inhibitory effect on the color reaction of o-phenylendiamine(OPD) oxidized by hydrogen peroxide(H2O2) in the presence of layered molybdenum disulfide(MoS2) nanosheets-based catalysts. This phenomenon was exploited to develop a colorimetric sensor for detection of tin(Ⅱ) ions. The experimental results showed that compared with the OPD/H2O2 colorimetric sensory system without MoS2 nanosheets, MoS2/OPD/H2O2 colorimetric sensory system exhibited increased sensitivity, low detection limit, and wide linear range toward tin(Ⅱ) ions. Under the optimum experimental conditions, the tin(Ⅱ) sensor based on MoS2/OPD/H2O2 system provided a linear range of 0.02—3.0 μmol/L with a low detection limit of 8 nmol/L(S/N=3). Moreover, the MoS2/OPD/H2O2 system displayed a high selectivity for tin(Ⅱ) detection, and can be used for the detection of tin(Ⅱ) ions in lake water samples.

Key words: Layered molybdenum disulfide nanosheets, Tin(Ⅱ) ion, o-Phenylenediamine, Colorimetric sensor

中图分类号: 

TrendMD: