Preparation of Nitrogen and FeP Doped Carbon Nanotubes for Selective and Simultaneous Electrochemical Detection of Dihydroxybenzoic Acid Isomers. (10th July 2017)

• Record Type: Journal Article
• Authors: Zhou, Haifeng; Cui, Malin; Zhao, Yuan; Wang, Chan; Song, Qijun
• Is Part Of: Electrochimica acta. Volume 242(2017)
• Page Start: 107
• Page End: 116
• Publication Date: 2017-07-10
• Subjects: Transition-metal phosphides -- Electrochemical sensor -- Dihydroxybenzoic acid isomers; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.05.045
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Nitrogen and iron phosphides (i.e., FeP) doped carbon nanotubes (N/FeP-CNT), featured with multi-element co-doping, multi-active sites, and uniform distribution were prepared and characterized. The synergistic effect of nitrogen doped carbon nanotubes (N-CNT) and FeP improved the electrical conductivity and electrocatalytic properties of the modified electrode, which provided a new analysis platform for simultaneous detection of dihydroxybenzoic acid isomers (DHBA isomers). Low detection limits (i.e., 124, 65, and 221 nmol L −1 for 2, 4-DHBA, 3, 4-DHBA, and 2, 5-DHBA, respectively) and wide detection range (i.e., 0.5-600, 0.5-560, and 0.5–820 μmol L −1 for 2, 4-DHBA, 3, 4-DHBA, and 2, 5-DHBA, respectively) were obtained for DHBA isomers. In addition, the electrode exhibited good anti-interference ability and long-term stability for the determination of DHBA isomers.