Fabrication of Highly Efficient Nanogold Membrane Catalysts Utilizing Ultrathin Gold Nanowires in the Presence of Thiourea

Abstract

Membrane catalysts have garnered considerable attention in recent years owing to their outstanding stability, high recyclability, environmental compatibility, and convenience. Herein, nanogold membrane catalysts have been successfully fabricated with ultrathin gold nanowires in the presence of thiourea by a vacuum filtration deposition method aimed at facilitating charge transport and enhancing the catalytic performance. By maintaining the thiourea treatment concentration at 500 μg/mL, the catalytic time of the nanogold membrane remained below 1.0 min for 2-nitrophenol, specifically at 15 s. The 500 μg/mL thiourea-treated nanogold membranes are also capable of rapidly catalyzing the reduction of 4-nitrophenol, methylene blue, and methyl orange, causing their respective UV characteristic peaks to disappear expeditiously within 20 s. Overall, this novel method offers a simple and convenient approach to obtaining nanogold membrane catalysts, holding great potential promise for applications in materials, catalysts, and environment fields.