Premium
The Hybrid of Gold Nanoparticles and 3D Flower‐like MnO 2 Nanostructure with Enhanced Activity for Detection of Hydrogen Peroxide
Author(s) -
Sheng Qinglin,
Qiao Xiujuan,
Zheng Jianbin
Publication year - 2018
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201700584
Subject(s) - x ray photoelectron spectroscopy , materials science , fourier transform infrared spectroscopy , cyclic voltammetry , scanning electron microscope , nanostructure , nanoparticle , detection limit , colloidal gold , hydrogen peroxide , analytical chemistry (journal) , electrochemical gas sensor , nuclear chemistry , electrochemistry , chemical engineering , nanotechnology , chemistry , electrode , organic chemistry , chromatography , composite material , engineering
3D Flower‐like manganese dioxide (MnO 2 ) nanostructure with the ability of catalysis for hydrogen peroxide (H 2 O 2 ) and super large area that can support gold nanoparticles (AuNPs) with enhanced activity of electron transfer have been developed. The nanostructure of hybrids was prepared by directly mixing citric‐capped AuNPs and 3‐aminopropyltriethoxysilane (3‐APTES)‐capped nano‐MnO 2 using an electrostatic adsorption strategy. The Au‐MnO 2 composite was extensively characterized by scanning electron microscope (SEM), X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), the Brunauer‐Emmett‐Teller (BET) method and X‐ray photoemission spectroscopy (XPS). Electrochemical properties were evaluated through cyclic voltammetry (CV) and amperometric method. The prepared sensor showed excellent electrochemical properties towards H 2 O 2 with a wide linear range from 2.5×10 −3 ∼1.39 mM and 3.89∼13.89 mM. The detection limit is 0.34 μM (S/N=3) with the sensitivities of 169.43 μA mM −1 cm −2 and 55.72 μA mM −1 cm −2 . The detection of real samples was also studied. The result exhibited that the prepared sensor can be used for H 2 O 2 detection in real samples.