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Au-Pt Bimetallic Nanoparticles Decorated on Sulfonated Nitrogen Sulfur Co-Doped Graphene for Simultaneous Determination of Dopamine and Uric Acid

Au-Pt Bimetallic Nanoparticles Decorated on Sulfonated Nitrogen Sulfur Co-Doped Graphene for Simultaneous Determination of Dopamine and Uric Acid

Kangning Zhang, Xiaoling Chen, Zhuang Li, Yan Wang, Sen Sun, Li'na Wang, Tong Guo, Dongxia Zhang, Zhonghua Xue, Xibin Zhou, Xiaoquan Lu

Talanta. 2018 Feb 1;178:315-323.

PMID: 29136829

Abstract:

In this work, a novel nanohybrid (AuPtNPs/S-NS-GR) of well-defined Au-Pt bimetallic nanoparticles (Au-PtNPs) decorated on sulfonated nitrogen sulfur co-doped graphene (S-NS-GR) was developed. Firstly, nitrogen sulfur co-doped graphene (NS-GR) was synthesized by one-step thermal annealing method. Secondly, phenyl SO3H- group was introduced onto the surface of NS-GR via diazotization reaction, which could provide more binding sites for the formation of metal nanoparticles. Finally, Au-Pt bimetallic nanoparticles were anchored on the surface of S-NS-GR by using electrochemical deposition. The prepared material was characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDS), Raman spectroscopy and electrochemical impedance spectra (EIS). In addition, the electrocatalytic activity towards dopamine (DA) and uric acid (UA) was systematically studied by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques. Under optimum conditions, the linear ranges for the detection of DA and UA were 1.0×10-8 - 4.0×10-4 M and 1.0×10-6 - 1.0×10-3 M with the limits of detection (LOD, S/N = 3) of 0.006μM and 0.038μM, respectively. Furthermore, the modified electrode was applied to real sample analysis.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS76151	Nitrogen/Sulfur co-doped graphene			Price

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