Study on preparation and properties of mesh Ti/BDND electrode

ABSTRACT

High-quality boron-doped nanocrystalline diamond (BDND) film was fabricated on mesh titanium substrate using hot filament chemical vapor deposition (HFCVD) system. Raman, X-ray diffraction (XRD), and scanning electron microscopy (SEM) spectroscopy were used to analyze the microstructure of the mesh Ti/BDND electrode. The SEM images show different parts of the mesh electrode surface are fully covered by the diamond film and particle sizes of that are nearly less than 1 μm on average. Additionally, the diamond film of the prepared electrode surface is relatively of high quality and the mesh electrode has a relatively small residual stress from Raman and XRD spectra, respectively. Cyclic voltammograms indicate that the mesh electrode has wide potential window, low background current and stable electrochemical properties in H₂SO₄ solution, suggesting that the prepared electrode is suitable for the application of wastewater treatment. The COD removal rate of the prepared mesh electrode increases by 10.4% compared with that of the plate electrode, which demonstrates that the ability of the mesh electrode in the wastewater treatment is relatively better.

Keywords:

• Preparation
• boron-doped diamond
• mesh electrode
• wastewater treatment

Funding

This project is supported by National Natural Science Foundation of China (Grant No.51005117 and No.51575269) and Graduate Student Innovation Base (Laboratory) Open Foundation of Nanjing University of Aeronautics and Astronautics (ykfjj20150507).