title: Controllable deposition of a platinum nanoparticle ensemble on a polyaniline/graphene hybrid as a novel electrode material for electrochemical sensing.
abstract: We demonstrate for the first time an interfacial polymerization method for the synthesis of high-quality polyaniline-modified graphene nanosheets (PANI/GNs), which represents a novel type of graphene/polymer heterostructure. The interfacial polymerization at a liquid-liquid interface allows PANI to grow uniformly on the surface of the GNs. An ultra-high loading of Pt nanoparticles was then controllably deposited on the surface of the PANI/GNs to form a Pt/PANI/GNs hybrid. The obtained composites were characterized by scanning electron microscopy, transmission electron microscopy, energy-dispersive spectrometry, X-ray diffraction, X-ray photoelectron spectroscopy, and thermogravimetric analysis. The Pt/PANI/GNs hybrid shows excellent electrocatalytic activity toward methanol oxidation and oxygen reduction. H(2)O(2) and glucose were used as two representative analytes to demonstrate the sensing performance of a Pt/PANI/GNs-modified electrode. It is found that this sensing element shows high sensitivity and a low detection limit for H(2)O(2) and glucose. The results demonstrate that the Pt/PANI/GNs hybrid may be an attractive and advanced electrode material with potential applications in the construction of electrochemical sensors and biosensors.
authors.affiliation: Department of Chemistry, Nanchang University, Nanchang 330031, China. jdqiu@ncu.edu.cn
authors.forename: Jian-Ding
authors.initials: JD
authors.lastname: Qiu
authors.forename: Ling
authors.initials: L
authors.lastname: Shi
authors.forename: Ru-Ping
authors.initials: RP
authors.lastname: Liang
authors.forename: Guo-Chong
authors.initials: GC
authors.lastname: Wang
authors.forename: Xing-Hua
authors.initials: XH
authors.lastname: Xia
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D015374:Biosensing Techniques; D004566:Electrodes; D005947:Glucose / Q000032:analysis; D006108:Graphite / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000032:analysis; D053768:Metal Nanoparticles / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D058105:Polymerization
chemical_list: D000814:Aniline Compounds; C416807:polyaniline; D010984:Platinum; D006108:Graphite; D006861:Hydrogen Peroxide; D005947:Glucose