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Synthesis of Ultrastable Ag Nanoplates/Polyethylenimine–Reduced Graphene Oxide and Its Application as a Versatile Electrochemical Sensor
Author(s) -
Wang Jindi,
Zhang Guoxin,
Sun Wanxia,
Sun Jingsong,
Luo Liang,
Chang Zheng,
Sun Xiaoming
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201601667
Subject(s) - polyethylenimine , graphene , oxide , materials science , chronoamperometry , electrochemistry , noble metal , hydrogen peroxide , chemical engineering , nanotechnology , nanocomposite , metal ions in aqueous solution , metal , chemistry , organic chemistry , electrode , cyclic voltammetry , transfection , biochemistry , engineering , metallurgy , gene
Investigations on Ag nanostructures/reduced graphene oxide composites have been frequently reported, yet the morphology control of those loaded Ag nanocrystals is still challenging. We herein develop a facile method to grow triangular Ag nanoplates (AgP) on polyethylenimine‐modified reduced graphene oxide (AgP/PEI‐rGO). The AgP/PEI‐rGO hybrids show unexpected high stability against chloride ions (Cl − ) and hydrogen peroxide (H 2 O 2 ), which is possibly due to the strong interaction between surface Ag atoms with the amine groups of PEI. In the chronoamperometry measurements for detecting H 2 O 2 , N 2 H 4 , and NaNO 2 , the AgP/PEI‐rGO hybrid shows very wide linear ranges (usually 10 −6 –10 −2 mol L −1 for H 2 O 2 , N 2 H 4 , and NaNO 2 ) and low detection limits (down to ≈1×10 −7 mol L −1 ), which demonstrate the promising electrochemical sensor applications of these metal/graphene hybrids with well‐defined morphologies and facets. In addition, this strategy could be extended to the deposition of other noble metals on rGO with controlled morphologies.