title: Au-Pt bimetallic nanoparticles supported on functionalized nitrogen-doped graphene for sensitive detection of nitrite.
abstract: In this work, we report a novel Au-Pt bimetallic nanoparticles (Au-PtNPs) decorated on the surface of nitrogen-doped graphene (NG) functionalized with 1, 3, 6, 8-pyrene tetra sulfonic acid sodium salt (PyTS) by direct electrodeposition method. The results of scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and electrochemical impendence spectrum (EIS) reveal that the Au-PtNPs were successfully anchored on the surface of NG sheets with a diameter of 20-40nm. Further, the prepared Au-PtNPs/PyTS-NG nanocomposite exhibits superior catalytic activity for the oxidation of nitrite. Under optimal experimental conditions, an amperometric sensor with a linear range of 0.5-1621μM and a detection limit of 0.19μM (S/N=3) for the detection of nitrite was set up and applied to real samples.
authors: Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, PR China.
authors: Zhuang
authors: Z
authors: Li
authors: Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, PR China.
authors: Zhenzhen
authors: Z
authors: An
authors: Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, PR China.
authors: Yongyang
authors: Y
authors: Guo
authors: Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, PR China.
authors: Kangning
authors: K
authors: Zhang
authors: Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, PR China.
authors: Xiaoling
authors: X
authors: Chen
authors: Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, PR China.
authors: Dongxia
authors: D
authors: Zhang
authors: College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, PR China.
authors: Zhonghua
authors: Z
authors: Xue
authors: Key Laboratory of Bioelectrochemistry & Environmental Analysis of Gansu Province, College of Geography and Environment Science, Northwest Normal University, Lanzhou 730070, PR China. Electronic address: zhouxb@nwnu.edu.cn.
authors: Xibin
authors: X
authors: Zhou
authors: College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, PR China. Electronic address: Luxq@nwnu.edu.cn.
authors: Xiaoquan
authors: X
authors: Lu
keywords: Electrocatalytic oxidation; Gold-platinum bimetallic nanoparticles; Nitrite; Nitrogen-doped graphene; Sensor