Highly sensitive electrochemical sensor for chloramphenicol based on MOF derived exfoliated porous carbon

Publication date: 15 May 2017
Source:Talanta, Volume 167
Author(s): Lili Xiao, Ruiyu Xu, Qunhui Yuan, Fu Wang
Benefit from the advantages in costless, simplicity and efficiency, solvent exfoliation has been widely used in preparation of two-dimensional nanosheets with enhanced performances in electronics, photonics, and catalysis. In this work, solvent exfoliation was first applied to prepare exfoliated porous carbon (EPC) from an isoreticular metal-organic framework-8 (IRMOF-8) derived porous carbon (DPC). The obtained EPC with high surface area (1854m²g⁻¹) and improved dispersibility was used as electrode modifier for glassy carbon electrode (GCE) in square wave voltammetry (SWV) detection of chloramphenicol (CAP). The sensitivity of EPC modified GCE (EPC/GCE) was greatly improved in compare with that of the DPC modification. The corresponding linear ranges are 1×10⁻⁸–1×10⁻⁶molL⁻¹ and 1×10⁻⁶–4×10⁻⁶molL⁻¹. The detection limit was calculated to be 2.9×10⁻⁹molL⁻¹ (at a signal-to-noise ratio of 3, S/N=3). In addition, the proposed sensor was successfully applied in the analysis of CAP in honey and achieved satisfying recovery.

Graphical abstract

http://ift.tt/2lpNaOH