Boron Nitride Nanosheet Modified Electrode: Preparation and Application to Direct Electrochemistry of Myoglobin

Abstract

An ionic liquid modified carbon paste electrode (CILE) was prepared with 1‐hexylpyridine hexafluorophosphate (HPPF6) and used as a substrate electrode. Then hexagonal boron nitride (BN) nanosheet, myoglobin (Mb) and Nafion were fixed on the electrode surface by coating method to get a new‐style chemically modified electrode (Nafion/Mb/BN/CILE). The morphology and crystal phase of BN nanosheet were characterized by SEM, TEM and XRD. UV‐Vis and FT‐IR results showed that Mb retained its original conformation in the composite modified film. In phosphate buffer solutions (PBS) with pH 3.0, cyclic voltammetry (CV) was performed to investigate the direct electrochemical behaviour of Mb. A pair of quasi‐reversible redox reaction peaks was obtained on the CV curve, proving that BN nanosheet had good biocompatibility and could accelerate electron transfer between Mb and electrode surface. Electrocatalytic reduction of trichloroacetic acid (TCA) was investigated, which was further applied to TCA detection. The catalytic reduction peak current at −0.355 V depended linearly on the TCA concentration in the range of 0.2∼30.0 mmol/L with the equation of Ipc (μA)=6.340 C (mmol/L)+0.305 (r=0.998), and the detection limit was 0.05 mmol/L (3 σ).

Nanocomposite of Palladium Nanoparticles Anchored on Boron Nitride Nanosheets as a Sensor for Liver Treatment Drug Silymarin

“…Recently, efforts have been made to use these materials to produce nanocomposites for sensors, energy storage, and other purposes. − 2D-hexagonal BNNSs (2D-hBNNS) are mainly used for bioimaging and drug delivery systems in biomedical fields due to their important applications such as electronics, sensing, and catalysis. − Recently, the use of 2D-hBNNS to load metal nanoparticles (NPs) for various sensor applications has been investigated. As reported, the modified electrodes in electrochemical sensors with these materials have provided satisfactory selectivity and efficiency. − In addition, the introduction of supported NPs on BNNS can also improve the electrochemical proficiency of the electrocatalyst through heterogeneous binding of nanoparticles (NPs) on BNNS, which is one of the excellent catalysts due to the synergistic effect and electronic interaction between NPs and BNNS. Palladium NPs (PdNPs) can be mentioned among the most widely used NPs in electrode modification that has been demonstrated as a good support for the electrochemical sensors because of its stability, controllable size distribution, and large surface to volume ratio. , …”

Synthesis of Two-Dimensional Hexagonal Boron Nitride and Mid-Infrared Nanophotonics

“…that give BN the potential to be used in many applications. In recent years, BN has demonstrated its great potential in optics (optoelectronic devices and detectors), − electrochemistry (electrochemical sensor platforms and biocompatibility), − catalysis, − and detection (temperature sensing, gas sensing, and humidity sensing). − …”

A fungus-derived biomass porous carbon–MnO2nanocomposite-modified electrode for the voltammetric determination of rutin

“…Our group fabricated numerous types of modied electrodes using CILE for electrochemical sensors and electrocatalysis. [33][34][35][36][37] Therefore, CILE is used as the substrate electrode with the MnO 2 @FBPC nanocomposite as the modi-er. The electrochemical responses of rutin on MnO 2 @FBPC/ CILE were investigated via cyclic voltammetry (CV) and differential pulse voltammetry (DPV) with electrochemical parameters calculated.…”