Papers by Keyword: Boron-Doped Diamond

Abstract: This study investigates the electrochemical reduction of quinine (QN) detection using boron-doped diamond electrodes (BDD). Different pulse voltammetry (DPV) of QN in a 0.1 M PB solution exhibits reduction peaks at -0.86 V (vs. Ag/AgCl). Additionally, the effects of pH and scan rate were explored to investigate the reduction mechanism within a potential range of -1.4 V to -0.4 V (vs. Ag/AgCl). Furthermore, a linear calibration curve was observed in the concentration range of 2 μM to 25 μM (R²=0.99) with a detection limit of 0.62 μM (S/B=3).

Abstract: Innovation in nanoscience depends fully on the ability to synthesize nanomaterials as well as to assemble them efficiently into complex architectures. The discovery of graphene and graphene polymer nanocomposites is playing a key role in modern nanoscience and nanotechnology. Graphene oxide (GO), is a derivative of graphene obtained by the use of strong oxidizing agents to obtain graphene oxide, a nonconductive hydrophilic carbon material. Synthesis of graphene oxide was performed using the Hummers method. Graphene oxide was integrated into the polysulfone (PSF) matrix to form polysulfone/graphene oxide nanocomposite. Polysulfone casting suspension was prepared by dissolving polysulfone in N,N-dimethyl acetamide. The polymer composites consisted of homogeneously blended polysulfone and graphene oxide casting solutions and drop coated onto boron-doped diamond electrodes (BDD). Interfacial electrochemical dynamics were characterised using cyclic voltammetry (CV), square wave voltammetry (SWV), and electrochemical impedance spectroscopy (EIS). Scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR) and Raman spectroscopy were used to study the morphology and structure of the prepared materials. Modifying with polysulfone blocks electron transfer in the redox reaction of K₃Fe(CN)₆. PSF /GO enhances electron transfer even when compared to bare BDD. The diffusion coefficient and sensitivity for PSF-GO/BDD electrode was calculated to be 2.660 x10^-4 cm² s^-1 and 6.7587 x10^-6 mV s^-1 / A.

Abstract: Boron-doped diamond films are deposited on cobalt cemented tungsten carbide (WC-Co) printed circuit board (PCB) milling tools using hot filament chemical vapor deposition (HFCVD) method. Trimethyl borate is used as boron source. Scanning electron microscope (SEM) and Raman spectroscopy are used to characterize the as-deposited diamond films. To evaluate the cutting performances of as-fabricated boron-doped diamond (BDD) coated milling tools, milling tests are conducted using copper-clad laminate（CCL）as the workpiece material, compared with microcrystalline diamond (MCD) coated and uncoated milling tools. The experimental results show that the BDD films have strong adhesive strength to the substrate and can protect the cutting edge from rapid wearing out. The results suggest that depositing BDD coating on WC-Co milling tools is a viable way to improve their cutting performances in machining of PCB materials.

Abstract: Boron-doped diamond (BDD) electro- catalysis is one of the advanced oxidation processes (AOPs) can be widely applied in water treatment, because the unique physical and chemical properties enable BDD to be an ideal anode material in electrochemical oxidation of aqueous organic pollutants. In this work, electrocatalysis is conducted in research of treating isopropyl alcohol model wastewater and real wastewater of low molecular organics on BDD electrode. Experiments are performed both in static and dynamic mode with a batch reactor and a circulation cell, and the effect of current density is investigated. The results reveal the superiority of dynamic mode in treating model wastewater and real wastewater. And the optimum working currency density of dynamic electrocatalysis for model wastewater and real wastewater are 1.29mA/cm2 and 3.84mA/cm2, respectively.