Graphdiyne-Templated Platinum Nanoparticles as a Novel Platform for the Electrochemical Determination of Bisphenol AF

Abstract

This work constructed an ultrasensitive electrochemical bisphenol AF (BPAF) sensor using ultra-stable graphdiyne-templated platinum nanoparticles (PtNPs@GDY) as a sensing platform. PtNPs@GDY nanocomposite was synthesized by a chemical reduction method, and the preparation process was simple and rapid. GDY, with its natural porous structure, was used as substrate to stabilize PtNPs. Due to the high adsorption ability of GDY, it can prevent PtNPs from aggregation and inactivation. Transmission electron microscopy (TEM), high-resolution TEM (HRTEM) and Energy-dispersive X-ray spectroscopy (EDS) were used to characterize the microstructure and morphologies of the materials. Cyclic voltammetry (CV), Electrochemical impedance spectroscopy (EIS) and differential pulse voltammetry (DPV) were employed to investigate the electrochemical properties of the material and the performance of the sensor. At an optimized condition, the sensor exhibited excellent catalytic activities towards BPAF. The linear ranges were from 0.4 to 15.4 μM and 35.4 to 775.4 μM. The limit of detection was 0.09 μM. In addition, the electrochemical sensor showed good reproducibility, stability and anti-interference.

Functional Graphdiyne for Emerging Applications: Recent Advances and Future Challenges

“…The calculated LOD value for the hemin/GDY is superior to those of the state-of-the-art nanostructures, such as bis(3pyridylmethyl) amine-functionalized carbon QDs (42 nm), [328] oxidized 3,3′,5,5′-tetramethylbenzidine and 5,10,15,20-tetrakis(1methyl-4-pyridinio)porphyrin (30 nm), [329] MnO 2 NS/boron nitride QDs (160 nm), [330] Ag nanocrystal (NC)/rGO (980 nm), [331] and magnetic nanoporous graphene (50 nm). [332] Except the hemin/GDY, other functional 0D nanostructure/GDY nanoarchitectures are also rapidly flourishing in the sensing community, such as Pt NP/GDY for the electrochemical determination of bisphenol AF, [78] Au NP/GDY for non-enzymatic electrochemical quantification of pesticides, [333] and rapid detection of cancer marker, MicroRNA let-7a, [334] Cu QD/GDY for real-time analysis of organophosphorus pesticides, [318] and CdS QD/GDY for rapid detection of microRNA-21. [311] Additionally, in 2022, Sui et al [315] successfully synthesized a 2D ultrathin GDY/graphene heterostructure, which was directly employed as an active electrode material for electrochemical sensing.…”