Preparation of SnS 2 /MWCNTs/rGO chemically modified electrode and its electrochemical detection of H 2 O 2

In view of the importance of rapid detection of H ₂ O ₂ , a carbon-based three-dimensional conductive network consisting of multiwalled carbon nanotubes (MWCNTs) and reduced graphene oxide (rGO) was introduced into the preparation of SnS ₂ to obtain SnS ₂ /MWCNTs/rGO modified composite, which was prepared by one-step hydrothermal method. When the mass ratio of MWCNTs and rGO was 1:1, the composite had the best detection effect on H ₂ O ₂ . At this time, SnS ₂ was uniformly distributed on the surface of tubular MWCNTs and flaky rGO, and MWCNTs were interspersed between layers of rGO. The synergistic effect of the three materials showed a high current response ability for the detection of H ₂ O ₂ . During the range of 0.238 ~ 12.267 mmol·L ^− 1 , the linear equation was I _pc (mA) = -0.029–0.019 c (m mol·L ^− 1 ), with a sensitivity of 388.28 µA·mmol ^− 1 ·L·cm ^− 2 and a detection limit of 0.236 µmol·L ^− 1 (S/N = 3). Moreover, the prepared modified electrode also had a good selectivity, reproducibility and stability.