One-step synthesis of nanosilver embedding laser-induced graphene for H(2)O(2) sensor

During the novel coronavirus pandemic, hydrogen peroxide (H(2)O(2)) played an important role as a disinfectant. However, high concentrations of H(2)O(2) can also cause damage to the skin and eyes. Therefore, the quantitative and qualitative detection of H(2)O(2) is an important research direction. In this work, we report a one-step laser-induced synthesis of graphene doped with Ag NPs composites. It directly trims screen printed electrodes (SPE). Firstly, we did the timekeeping current method (CA) test on H(2)O(2) using a conventional platinum sheet as the counter electrode, and obtained linear ranges of 1–110 μM and 110–800 μM with a sensitivity of 118.7 and 96.3 μAmM(−1)cm(−2) and a low detection limit of (LOD) 0.24 μM and 0.31 μM. On this basis we have also achieved a good result in CA testing using Screen printed carbon electrodes (SPCE), laying the foundation for portable testing. The sensor has excellent interference immunity and high selectivity.