Silver nanowire size‐dependent effect on the catalytic activity and potential sensing of H2O2

Abstract

Abstract The design of potential nanosensors based on nanometric metals have been widely used for screening of various biomolecules and agents. One‐dimension (1D) silver nanowires (AgNWs) construction were synthesized by the polyol method and employed to detect of H2O2. The addition of various Ag‐source (AgNO3) concentrations of 0.15, 0.3, and 0.6 M lead to form of different AgNWs diameter of 0.05, 0.137, and 0.27 μm, respectively. The sensing property and electrochemical activity were enhanced with the decreasing of the AgNWs diameter, and followed the order of AgNWs0.05> AgNWs0.137> AgNWs0.27. Moreover, the morphological structure of good desperation, long wire length, and 1D orientation play a key role in the electrocatalytic efficiency of the designed electrodes. The facile diffusion of electron/molecules inner/outer the surface, the high volume to mass ratio ascertain the highly efficient electrocatalyst with high stability. AgNWs0.05, as an electrode surface, ascertains nonenzymatic sensors to detect H2O2 with high stability, high sensitivity, good selectivity, and reasonable reproducibility. The detection limit was low as 0.05 μM with a wide linear range of up to 1075 μM. Also, AgNWs0.05 shows a highly selective sensor for detecting H2O2 in complex mediums such as milk samples with a high recovery of 99.5‐100%. Therefore, the AgNWs0.05 can be used to detect H2O2 in various complex samples such as milk.

Keywords

• electrocatalyst
• H2O2
• nanomaterials
• nonenzymatic sensor
• silver nanowires