title: Water-soluble polymer exfoliated graphene: as catalyst support and sensor.
abstract: In this paper, we obtained various water-soluble polymer functionalized graphene in dimethyl sulfoxide under ultrasonication. The atomic force microscope analysis and control experiment shows the water-soluble polymer is the crucial part to help solvent molecules separate interlayer. Such polymer/graphene exhibits high conductivity and tunable surface property, as confirmed by the selected area electron diffraction and Raman and electrochemical impedance spectroscopy. As a result, a catalyst based on polyvinyl pyrrolidone (PVP)/graphene shows better methanol oxidation performance than that based on PVP/reduced graphene oxide. By changing to another polymer, poly(4-vinylpyridine)/graphene shows a stable and reversible response to pH, and demonstrates its potential for sensor application.
authors.affiliation: School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore.
authors.forename: Haibo
authors.initials: H
authors.lastname: Wang
authors.forename: Baoyu
authors.initials: B
authors.lastname: Xia
authors.forename: Ya
authors.initials: Y
authors.lastname: Yan
authors.forename: Nan
authors.initials: N
authors.lastname: Li
authors.forename: Jing-Yuan
authors.initials: JY
authors.lastname: Wang
authors.forename: Xin
authors.initials: X
authors.lastname: Wang
mesh_terms: D002384:Catalysis; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D011145:Polyvinyls / Q000737:chemistry*; D011205:Povidone / Q000737:chemistry*; D012995:Solubility; D014465:Ultrasonics; D014867:Water / Q000737:chemistry*
chemical_list: D011145:Polyvinyls; D014867:Water; C019535:poly(4-vinylpyridine); D006108:Graphite; D011205:Povidone; D004121:Dimethyl Sulfoxide