title: High catalytic activity of electrochemically reduced graphene composite toward electrochemical sensing of Orange II.
abstract: Orange II, an azo dye, is sometimes illegally used as a red dye in food products despite its adverse health effects if consumed. Therefore, the determination of low concentrations of Orange II is an important target. An Orange II sensor was prepared using electrochemically reduced graphene oxide grafted with 5-amino-1,3,4-thiadiazole-2-thiol-Pt nanoparticles (denoted as ERGO-ATDT-Pt) onto a glassy carbon electrode (GCE) and investigated for Orange II detection in 0.1M acetate buffer solution (ABS at pH 4.5) with prominent reversible redox peaks. A wide linear range of 1×10(-)(8)-6×10(-)(7)M with a low detection limit of 3.4×10(-)(10)M (s/n=3) was found for Orange II detection. This developed ERGO-ATDT-Pt/GCE sensor showed good selectivity, excellent stability and better response to the real sample analysis with excellent recovery.
authors.affiliation: Department of Chemistry and Institute of Basic Science, Chonnam National University, Gwangju 500-757, Republic of Korea.
authors.forename: Mira
authors.initials: M
authors.lastname: Yun
authors.affiliation: Department of Chemistry and Institute of Basic Science, Chonnam National University, Gwangju 500-757, Republic of Korea.
authors.forename: Ju Eun
authors.initials: JE
authors.lastname: Choe
authors.affiliation: Department of Chemistry and Institute of Basic Science, Chonnam National University, Gwangju 500-757, Republic of Korea.
authors.forename: Jung-Min
authors.initials: JM
authors.lastname: You
authors.affiliation: Department of Chemistry and Institute of Basic Science, Chonnam National University, Gwangju 500-757, Republic of Korea.
authors.forename: Mohammad Shamsuddin
authors.initials: MS
authors.lastname: Ahmed
authors.affiliation: Department of Chemistry and Institute of Basic Science, Chonnam National University, Gwangju 500-757, Republic of Korea.
authors.forename: Kyungmi
authors.initials: K
authors.lastname: Lee
authors.affiliation: Department of Chemistry, Faculty of Arts and Science, Dumlupınar University, 43100 Kutahya, Turkey. Electronic address: zustundag@gmail.com.
authors.forename: Zafer
authors.initials: Z
authors.lastname: Ustündağ
authors.affiliation: Department of Chemistry and Institute of Basic Science, Chonnam National University, Gwangju 500-757, Republic of Korea. Electronic address: swjeon3380@naver.com.
authors.forename: Seungwon
authors.initials: S
authors.lastname: Jeon
mesh_terms: D001391:Azo Compounds / Q000032:analysis*; D001557:Benzenesulfonates / Q000032:analysis*; D055664:Electrochemical Techniques / Q000295:instrumentation / Q000379:methods*; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D057230:Limit of Detection; D053758:Nanoparticles / Q000737:chemistry; D010084:Oxidation-Reduction
chemical_list: D001391:Azo Compounds; D001557:Benzenesulfonates; D006108:Graphite; C014722:2-naphthol orange
keywords: Azo dye; Electrochemical sensor; Electrochemically reduced GO; Orange II; Platinum nanoparticles