title: Pt/graphene-CNTs nanocomposite based electrochemical sensors for the determination of endocrine disruptor bisphenol A in thermal printing papers.
abstract: A facile and green method was developed to synthesize the graphene-carbon nanotubes (Gr-CNTs) nanocomposite with a sandwich lamination structure. Pt nanoparticles were loaded on the as-synthesized Gr-CNTs nanocomposite to prepare an electrochemical sensor for determining bisphenol A (BPA) in thermal printing paper. The electrochemical behavior of BPA on the Pt/Gr-CNTs nanocomposite was investigated by cyclic voltammetry (CV) and chronocoulometry (CC). The direct determination of BPA was accomplished by using differential pulse voltammetry (DPV) under optimized conditions. The oxidation peak current was proportional to the BPA concentration in the range from 6.0 × 10(-8) to 1.0 × 10(-5) M and 1.0 × 10(-5) to 8.0 × 10(-5) M with a correlation coefficient of 0.987 and 0.998, respectively. The detection limit was 4.2 × 10(-8) M (S/N = 3). The fabricated electrode showed good reproducibility, stability and selectivity. The proposed method was successfully applied to determine BPA in thermal printing papers samples and the results were satisfactory.
authors.affiliation: College of Chemistry and Chemical Engineering, Lanzhou University, 730000 Lanzhou, China.
authors.forename: Zhixiang
authors.initials: Z
authors.lastname: Zheng
authors.forename: Yongling
authors.initials: Y
authors.lastname: Du
authors.forename: Zaihua
authors.initials: Z
authors.lastname: Wang
authors.forename: Qingliang
authors.initials: Q
authors.lastname: Feng
authors.forename: Chunming
authors.initials: C
authors.lastname: Wang
mesh_terms: D001559:Benzhydryl Compounds / Q000032:analysis* / Q000737:chemistry; D015374:Biosensing Techniques; D055664:Electrochemical Techniques; D052244:Endocrine Disruptors / Q000032:analysis*; D006108:Graphite / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry; D053761:Nanocomposites / Q000737:chemistry; D037742:Nanotubes, Carbon / Q000737:chemistry; D010209:Paper; D010636:Phenols / Q000032:analysis* / Q000737:chemistry; D010984:Platinum / Q000737:chemistry; D000098826:Bisphenol A Compounds
chemical_list: D001559:Benzhydryl Compounds; D052244:Endocrine Disruptors; D006108:Graphite; D037742:Nanotubes, Carbon; D010636:Phenols; D010984:Platinum; C006780:bisphenol A; D000098826:Bisphenol A Compounds