Surfactant assisted Cr-metal organic framework for the detection of bisphenol A in dust from E-waste recycling area

Abstract Due to their highly porous structures, metal organic framework materials are widely used in analytic areas. In this paper, Cr-metal organic framework (MIL-101(Cr)) modified electrode is prepared and then used as electrochemical sensor for the detection of bisphenol A (BPA). By using one kind of surfactant of cetyltrimethylammonium bromide (CTAB), the analytic performances of MIL-101 (Cr) towards BPA detection are greatly improved. Compared with pure MIL-101 (Cr), the differential pulse voltammetry (DPV) behavior of CTAB/MIL-101 (Cr) is improved 3.0 times in the presence of BPA. The hydrophobic long chain alkanes of CTAB can improve the enrichment and electrochemical oxidation for BPA. In this work, the CTAB/MIL-101 (Cr) sensor exhibits a linear range from 20-350 nM and a low detection limit of 9.95 nM (LOD = 3sb/S) and shows good reproducibility, stability and selectivity. Finally, real samples of dusts from E-waste recycling area in South China are collected and the prepared CTAB/MIL-101 (Cr) sensor demonstrates satisfactory results for BPA detection from these dust samples.