title: An electrochemical sensor for simultaneous determination of ascorbic acid, dopamine, uric acid and tryptophan based on MWNTs bridged mesocellular graphene foam nanocomposite.
abstract: A multi-walled carbon nanotubes (MWNTs) bridged mesocellular graphene foam (MGF) nanocomposite (MWNTs/MGF) modified glassy carbon electrode was fabricated and successfully used for simultaneous determination of ascorbic acid (AA), dopamine (DA), uric acid (UA) and tryptophan (TRP). Comparing with pure MGF, MWNTs or MWNTs/GS (graphene sheets), MWNTs/MGF displayed higher catalytic activity and selectivity toward the oxidation of AA, DA, UA and TRP. Under the optimal conditions, MWCNs/MGF/GCE can simultaneously detect AA, DA, UA and TRP with high selectivity and sensitivity. The detection limits were 18.28 µmol L(-1), 0.06 µmol L(-1), 0.93 µmol L(-1) and 0.87 µmol L(-1), respectively. Moreover, the modified electrode exhibited excellent stability and reproducibility.
authors.affiliation: Department of Chemistry, Fudan University, Shanghai 200433, PR China.
authors.forename: Huixiang
authors.initials: H
authors.lastname: Li
authors.affiliation: Department of Chemistry, Fudan University, Shanghai 200433, PR China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Fudan University, Shanghai 200433, PR China.
authors.forename: Daixin
authors.initials: D
authors.lastname: Ye
authors.affiliation: Department of Chemistry, Fudan University, Shanghai 200433, PR China.
authors.forename: Juan
authors.initials: J
authors.lastname: Luo
authors.affiliation: Department of Chemistry, Fudan University, Shanghai 200433, PR China.
authors.forename: Biquan
authors.initials: B
authors.lastname: Su
authors.affiliation: Department of Chemistry, Fudan University, Shanghai 200433, PR China.
authors.forename: Song
authors.initials: S
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, Fudan University, Shanghai 200433, PR China. Electronic address: jlkong@fudan.edu.cn.
authors.forename: Jilie
authors.initials: J
authors.lastname: Kong
mesh_terms: D001205:Ascorbic Acid / Q000032:analysis* / Q000737:chemistry; D004298:Dopamine / Q000032:analysis* / Q000737:chemistry; D004553:Electric Conductivity; D055664:Electrochemical Techniques; D004566:Electrodes; D006108:Graphite / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D053761:Nanocomposites / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry; D015203:Reproducibility of Results; D013499:Surface Properties; D014364:Tryptophan / Q000032:analysis* / Q000737:chemistry; D014527:Uric Acid / Q000032:analysis* / Q000737:chemistry
chemical_list: D037742:Nanotubes, Carbon; D014527:Uric Acid; D006108:Graphite; D014364:Tryptophan; D001205:Ascorbic Acid; D004298:Dopamine
keywords: Ascorbic acid; Dopamine; Mesocellular graphene foam; Multi-walled carbon nanotubes; Tryptophan; Uric acid