title: Sensitive and reliable ascorbic acid sensing by lanthanum oxide/reduced graphene oxide nanocomposite.
abstract: A simple strategy for the detection and estimation of ascorbic acid (AA), using lanthanum oxide-reduced graphene oxide nanocomposite (LO/RGO) on indium tin oxide (ITO) substrate, is reported. LO/RGO displays high catalytic activity toward the oxidation of AA, and the synergism between lanthanum oxide and reduced graphene oxide was attributed to the successful and efficient detection. Detection mechanism and sensing efficacy of LO/RGO nanocomposite are investigated by electrochemical techniques. Chronoamperometric results under optimal conditions show a linear response range from 14 to 100 μM for AA detection. Commercially available vitamin C tablets were also analyzed using the proposed LO/RGO sensor, and the remarkable recovery percentage (97.64-99.7) shows the potential application in AA detection.
authors.affiliation: Department of Chemistry, University of Delhi, Delhi, 110007, India.
authors.forename: Navin Kumar
authors.initials: NK
authors.lastname: Mogha
authors.forename: Vikrant
authors.initials: V
authors.lastname: Sahu
authors.forename: Meenakshi
authors.initials: M
authors.lastname: Sharma
authors.forename: Raj Kishore
authors.initials: RK
authors.lastname: Sharma
authors.forename: Dhanraj T
authors.initials: DT
authors.lastname: Masram
mesh_terms: D001205:Ascorbic Acid / Q000737:chemistry / Q000302:isolation & purification*; D002384:Catalysis; D006108:Graphite / Q000737:chemistry*; D007811:Lanthanum / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*; D017971:Tin Compounds / Q000737:chemistry
chemical_list: D010087:Oxides; D017971:Tin Compounds; C103829:lanthanum oxide; D007811:Lanthanum; C109984:indium tin oxide; D006108:Graphite; D001205:Ascorbic Acid