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Hierarchical Gadolinium Oxide Microspheres for Enzymeless Electro‐biosensors in Hydrogen Peroxide Dynamic Detection
Author(s) -
Yan Yibo,
Zhao Jun,
Luo Jianqiang,
Lee JongMin
Publication year - 2017
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201600641
Subject(s) - gadolinium , transmission electron microscopy , materials science , x ray photoelectron spectroscopy , scanning electron microscope , detection limit , oxide , analytical chemistry (journal) , dynamic range , linear range , hydrogen peroxide , nanotechnology , chemistry , chemical engineering , optics , chromatography , physics , organic chemistry , engineering , metallurgy , composite material
A porous gadolinium oxide spherically hierarchical structure (Gd 2 O 3 ‐ms) has been developed by using a hydrothermal method to perform enzymeless dynamic detection of hydrogen peroxide (H 2 O 2 ), based on its high sensitivity in electrocatalytic reduction of H 2 O 2 . X‐ray diffraction, X‐ray photoelectron spectroscopy, field‐emission scanning electron microscopy, transmission electron microscopy, and high‐resolution transmission electron microscopy have assisted in shedding light on the morphology, material formation process, structure, and properties of the porous gadolinium oxide microspheres. The linear range from 1 to 450 μM (linear correlation coefficient 0.991), sensitivity of 13.9 μA mM −1 , and fine detection limit with a prompt current response attaining stable value were achieved by this enzymeless sensor, which was also employed to implement the dynamic tracing of H 2 O 2 ‐releasing processes.