Journal Article

Preparation of SnS2/MWCNTs chemically modified electrode and its electrochemical detection of H2O2

Hu Ailin, Duan Zhihong, Jiang, Qi, Yang, Xiaoxiao, Lu, Xiaoying, Huang Chaolian

2020

Overview

Considering the importance of hydrogen peroxide (H2O2) rapid detection, a SnS2/MWCNTs composite was prepared by loading tin disulfide (SnS2) nanoparticles on a three-dimensional conductive network composed of multi-walled carbon nanotubes (MWCNTs). The obtained SnS2/MWCNTs composite was used as the modified material to prepare a chemically modified electrode (CME), which was used for the rapid detection of H2O2. The morphology and structure of the obtained samples were characterized and analyzed by scanning electron microscopy, X-ray diffraction, and energy-dispersive spectroscopy. The electrochemical performance of the modified electrode was researched by cyclic voltammetry, amperometric i–t curves, and AC impedance techniques. The results show that SnS2 nanoparticles with a size of about 33 nm are evenly dispersed on the surface of MWCNTs. The obtained SnS2/MWCNTs-CME has a strong current response to H2O2: it has a good linear relationship during the range of 0.248 ~ 16.423 mmol L−1, and its linear regression equation is Ipa (mA) = (−0.94 ± 0.05) × 10−2 + (− 0.43 ± 0.06) × 10−2c (mmol L−1) (R2 = 0.997) with a sensitivity of 87.84 μA mmol−1 L cm−2. The corresponding detection limit is 1.04 μmol L−1 (S/N = 3). At the same time, the SnS2/MWCNTs-CME has good selectivity, reproducibility, and stability.

• Publisher: Springer Nature B.V
• Subject: Dispersion / Electrical measurement / Electrochemical analysis / Electrochemistry / Electrodes / Hydrogen peroxide / Morphology / Multi wall carbon nanotubes / Nanoparticles / Nanotechnology / Nanotubes / Regression analysis / Scanning electron microscopy / Selectivity / Spectroscopy / Tin / Tin disulfide / X-ray diffraction