Details

Autor(en) / Beteiligte

• Mei, Ruiqiong
• Wei, Qiuping
• Zhu, Chengwu
• Ye, Wentao
• Zhou, Bo
• Ma, Li
• Yu, Zhiming
• Zhou, Kechao

Titel

3D macroporous boron-doped diamond electrode with interconnected liquid flow channels: A high-efficiency electrochemical degradation of RB-19 dye wastewater under low current

Ist Teil von

• Applied catalysis. B, Environmental, 2019-05, Vol.245, p.420-427

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •A novel three dimensional BDD foam electrode was prepared for the first time.•A simple and reproducible preparation method of 3D-BDD was proposed.•The electro-active surface area of 3D-BDD electrode is 20 times larger than that of 2D-BDD electrode.•The highest oxidation reaction rate of 0.09 min−1 so far was obtained for the degradation with BDD electrode. Boron-doped diamond (BDD) has proved to be an ideal anode material for the electrolysis of organic sewage. However, the existing two dimensional BDD electrodes with small active area and low mass transfer rates, limit their further improvement in degradation efficiency. In this paper, a novel three dimensional macroporous BDD (3D-BDD) foam electrode with a structure of evenly distributed pores and interconnected networks in which wastewater can flow freely was prepared using a simple and reproducible method. Compared to two dimensional BDD electrodes of the same geometry, the electro-active surface area of 3D-BDD electrode increased by ˜20 times, and the electrochemical oxidation reaction rate constant of RB-19 increased by ˜350 times. Under optimized conditions, the energy consumption reduced to a minimum of 0.03 kWh(gTOC) −1, and the MCE reach a maximum of 325.86%.