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Updated: Apr 28, 2026
Synthesis and Catalytic Performance of Gold Intercalated in the Walls of Mesoporous Silica
Published on: July 9, 2015
Adsorption dominant catalytic activity of a carbon dots stabilized gold nanoparticles system
Ruihua Liu1, Juan Liu, Weiqian Kong
1Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, China. yangl@suda.edu.cn zhkang@suda.edu.cn.
Abstract:
Carbon dots (CDs) with abundant functional groups (-OH, -COOH, C=O) on their surface were specially designed to enhance the adsorption capacity and the catalytic activity of gold nanoparticles (AuNPs). The CDs stabilized gold nanoparticles (AuNPs-CDs) were greenly synthesized by a one-step reduction of HAuCl4 with CDs which were used as both the reductant and the stabilizer under visible light irradiation. The resulting AuNPs-CDs exhibit a high catalytic activity towards the reduction of 4-nitrophenol, with a good linear correlation of ln(C(i)/C0) versus time and a kinetic rate constant about 0.68 min(-1). Further detailed adsorption kinetics data indicated that the present adsorption system follows a predominantly second-order rate model, and the CDs capped on the surface of the AuNPs also enhanced the adsorption capacity and the catalytic activity of the AuNPs.
