Boron doped micro/nanocrystalline diamond electrodes used on the electrochemical flow reactor to degrade brilliant green dye. (15th February 2017)

• Record Type: Journal Article
• Authors: Toledo, William D.; Silva, Lilian M.; Santos, Marta; Sardinha, André F.; Ferreira, Neidenêi G.
• Is Part Of: MRS advances. Volume 2:Number 41(2017)
• Page Start: 2241
• Page End: 2246
• Publication Date: 2017-02-15
• Subjects: diamond, -- chemical vapor deposition (CVD) (deposition), -- water; Electrical engineering -- Congresses; Physics -- Congresses; Materials -- Research -- Congresses; Materials science -- Congresses; 620.11
• DOI: 10.1557/adv.2017.180
• Languages: English
• ISSNs: 2059-8521

Abstract

ABSTRACT: A systematic study was performed concerning the production, characterization, and application of BDD and BDND films grown on Ti substrate to degrade brilliant green dye using an electrochemical flow reactor. Films were grown in a hot filament chemical vapour deposition (HFCVD) reactor using H2 /CH4 (BDD) and H2 /CH4 /Ar (BDND) gas mixtures. Boron doping was performed by dissolution of B2 O3 in methanol in the appropriate B/C ratio to obtain good conductive electrodes. The electrolysis was carried out using BDD/Ti and BDND/Ti as anode material analyzing the influence of different current densities and flow rates. During the electrolysis, aliquots of the treated solution were analyzed by UV-Vis and Total Organic Carbon (TOC) measurements. The electrode efficiencies were compared considering the color removal as well as the TOC mineralization in the end of each electrolysis. The absorption bands intensity from UV/Vis spectra clearly decreased up to their completely vanishing at current density of 100 mA/cm 2 for both electrodes. These results were corroborated by TOC measurements where 50% of the organic material was removed.