title: Adsorption dominant catalytic activity of a carbon dots stabilized gold nanoparticles system.
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.
authors.affiliation: Institute 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.
authors.forename: Ruihua
authors.initials: R
authors.lastname: Liu
authors.forename: Juan
authors.initials: J
authors.lastname: Liu
authors.forename: Weiqian
authors.initials: W
authors.lastname: Kong
authors.forename: Hui
authors.initials: H
authors.lastname: Huang
authors.forename: Xiao
authors.initials: X
authors.lastname: Han
authors.forename: Xing
authors.initials: X
authors.lastname: Zhang
authors.forename: Yang
authors.initials: Y
authors.lastname: Liu
authors.forename: Zhenhui
authors.initials: Z
authors.lastname: Kang