Premium
A Hydrogen Peroxide Sensor Based on Silver Nanoparticles Biosynthesized by Bacillus subtilis
Author(s) -
Liu Ruixiao,
Wei Yahui,
Zheng Jianbin,
Zhang Hongfang,
Sheng Qinglin
Publication year - 2013
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201300487
Subject(s) - chemistry , chronoamperometry , ascorbic acid , cyclic voltammetry , hydrogen peroxide , dielectric spectroscopy , nuclear chemistry , detection limit , electrochemical gas sensor , silver nanoparticle , scanning electron microscope , bacillus subtilis , transmission electron microscopy , electrochemistry , nanoparticle , inorganic chemistry , analytical chemistry (journal) , chromatography , nanotechnology , organic chemistry , electrode , materials science , physics , food science , quantum mechanics , biology , bacteria , genetics
In this study, silver nanoparticles (AgNPs) were biosynthesized by Bacillus subtilis and used to construct a nonenzymatic hydrogen peroxide (H 2 O 2 ) sensor. Scanning electron microscopy, transmission electron microscopy and energy dispersive spectroscopy confirmed that the AgNPs were prepared successfully with spherical morphology. The electrochemical properties of the resulted sensor were investigated by cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy. It was found that the sensor exhibited good electrocatalytic activity towards H 2 O 2 reduction with a wider linear range from 0.05 to 120 mmol·L −1 , a detection limit of 8 µmol·L −1 and a fast response time less than 2 s. The sensor exhibited good selectivity for H 2 O 2 determination in the presence of glucose, acetaminophen, ascorbic acid and uric acid.