Detection of bisphenol A based on conducting binder supported hydrophobic 1,10-PhenanNTf2 ionic liquid onto flat silver electrode by electrochemical approaches

Abstract

The synthesis of room-temperature stable ionic liquids was obtained via metathesis reaction, which was accomplished by the reaction 1,10-Phenanthroline monohydrate hydrochloride with lithium-bis(trifluoromethane)sulfonamide in water (shortly, 1,10-PhenanNTf2). The prepared 1,10-PhenanNTf2 was characterized in details with various conventional methods. Finally, it was mixed with conducting binders and deposited on flat-silver electrode (AgE) to result in a sensor that has a fast response to bisphenol A (BPA) in the phosphate buffer phase (PBP). Features include high sensitivity, low-sample volume, reliability, reproducibility, ease of integration, long-term stability, and enhanced electrochemical responses. The calibration plot is linear (r2 = 0.9789) over the 0.1 nM–0.1 mM BPA concentration range. The sensitivity is ∼1.485 μA μM cm−2, and the detection limit is 0.09 ± 0.01 nM (at a signal-to-noise-ratio, SNR of 3). We believe that the developed approach significantly opens up a simple, fast, highly sensitive, and environment-friendly path to fabricate ionic liquid based chemical sensors with broad application prospects.

Keywords

• Ionic liquid
• 1,10-PhenanNTf2
• Bisphenol A
• Silver electrode
• Sensitivity
• I–V method