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Abstract A new type of 3D material that allows gas circulation through it composed of polyether sponge, silver nanowires and silver dendrites was built. The material was bonded inside a… Click to show full abstract
Abstract A new type of 3D material that allows gas circulation through it composed of polyether sponge, silver nanowires and silver dendrites was built. The material was bonded inside a graphite tube. The silver dendrites were electrochemically deposited on the metallic nanowire network during the recirculation of the electrolyte through the electrode. Air containing 0.89 ÷ 100 ppm H2S was circulated through the porous electrode. Subsequently, the electrode was characterized by cyclic voltammetry. It exhibited a linear response for concentrations between 3.6 ÷ 28.5 ppm H2S in air and the detection limit was below 1 ppm. Due to the large electroactive surface and innovative design it was possible to easily obtain sensitivities of 3.9·104 nA/ppmv at concentrations lower than 1 ppm H2S in air.
Journal Title: Materials Letters
Year Published: 2021
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