title: Graphene Nanoribbon-Supported PtPd Concave Nanocubes for Electrochemical Detection of TNT with High Sensitivity and Selectivity.
abstract: In this work, PtPd concave nanocubes anchored on graphene nanoribbons (PtPd-rGONRs) were successfully fabricated through a hydrothermal process. The structural characterizations confirmed that PtPd concave cubes with an average size of around 11 nm have been successfully synthesized and they are uniformly assembled on the surface of rGONRs. The electrochemical measurements demonstrated that the PtPd-rGONRs composite-modified glassy carbon electrode (GCE) shows much enhanced current signals for TNT reduction, which is 4 and 12-fold higher than rGONRs and bare glassy carbon electrode, respectively. The PtPd-rGONRs exhibited a wide linear range for TNT detection from 0.01 to 3 ppm with the sensing limit of 0.8 ppb. Moreover, the PtPd-rGONRs showed excellent detection stability for the determination of TNT. Most importantly, the PtPd-rGONRs-based electrochemical detection platform can be successfully applied to TNT detection in tap water and real lake water samples. The present study indicates that graphene nanoribbon-supported nanocrystals are promising in designing high performance electrochemical sensors for explosives detection.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, Jilin, China.|University of Chinese Academy of Sciences , Beijing 100039, China.
authors.forename: Ruizhong
authors.initials: R
authors.lastname: Zhang
authors.forename: Chia-Liang
authors.initials: CL
authors.lastname: Sun
authors.affiliation: Department of Neurosurgery, Chang Gung Memorial Hospital , No. 5, Fu-Shing Road, Guishan, Taoyuan 333, Taiwan, ROC.
authors.forename: Yu-Jen
authors.initials: YJ
authors.lastname: Lu
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun 130022, Jilin, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
mesh_terms: D055664:Electrochemical Techniques; D006108:Graphite / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D014303:Trinitrotoluene / Q000032:analysis*
chemical_list: D037742:Nanotubes, Carbon; D014303:Trinitrotoluene; D010984:Platinum; D010165:Palladium; D006108:Graphite