High-Performance Ti/BDD Electrodes for Pollutant Oxidation

Abstract

Deposition of stable boron-doped diamond (BDD) films on Ti substrates is believed to be very difficult. In the present study, the stability of Ti/BDD electrodes has been significantly improved by using an organic additive, CH2(OCH3)2. The improved electrodes had service lives of 175-264 h under accelerated life test conditions, which are 2.3-3.0 times longer than the service lives of electrodes prepared with the conventional H2 + CH4 mixture. Raman spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM) examinations demonstrated thatthe films had well-defined diamond features. The current efficiency (CE) obtained on Ti/BDD was 46.9-78.5% in oxidizing acetic acid, maleic acid, phenol, and dyes, which is 1.6-4.3-fold higher than that obtained on the typical Ti/ Sb2O5-SnO2 electrode. We used a Ti/BDD electrode prepared with H2 + CH4 + CH2(OCH3)2 for over 300 h; its activity remained superior. The successful development of stable and active Ti/BDD electrodes significantly increases the feasibility of industrial applications of anodic oxidation in wastewater treatment.

Synthesis and characterization of new Ti–Bi2O3 anode and its use for reactive dye degradation

“…The anodic material is very important for the electrochemical oxidation processes. Various materials are used as anodes: Pt [7,8], boron-doped diamond [9], graphite [10] activated carbon fiber [11] and electrodes based on metal oxides, such as PbO2, RuO2, IrO2, SnO2, SbOx etc. and their mixtures.…”

Photoelectrochemical degradation of anti-inflammatory pharmaceuticals at Bi2MoO6–boron-doped diamond hybrid electrode under visible light irradiation

“…The applications of BDD electrodes in electrochemical analysis, wastewater treatment and supporting catalyst have attracted many interests [11,12]. In particular, the diamond electrode has been reported to be a stable and effective electrode for environmentally oriented and analytical purposes.…”

Design of BDD-TiO2 Hybrid Electrode with P−N Function for Photoelectrocatalytic Degradation of Organic Contaminants

“…1 shows the Raman spectrum of PECD as well as BDD electrode. There is a sharp peak around 1334 cm -1 , slightly away from the characteristic signature of the diamond structure, 1332 cm -1 , revealing the presence of diamond for the BDD and hybrid electrode (8). It was reported that peaks at 142, 404, 516, and 635 cm -1 are characteristic of anatase (19).…”

“…The outstanding electrochemical properties of BDD recommend this material as an excellent substrate for electrocatalytic oxide layer in anode oxidation of organic contaminants (8). Moreover, the BDD electrode exhibit p-type semiconductor properties.…”