TiO2 Nanotube Arrays Modified Titanium: A Stable, Scalable, and Cost-Effective Bioanode for Microbial Fuel Cells
Huajun Feng, Yuxiang Liang, K. Guo, Wei Chen +5
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100% confidenceSpecialized MFC research in advanced-systems focusing on advanced-configuration, novel-materials, performance-optimization. Titanium has been widely used as a dimensionally stable anode in the electrolysis industry because of its excellent corrosion resi...
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Abstract
Titanium has been widely used as a dimensionally stable anode in the electrolysis industry because of its excellent corrosion resistance, conductivity, and scalability. However, because of its poor biocompatibility and poor performance as a bioanode, it has drawn little attention in the field of microbial fuel cells (MFCs). This study reports an efficient way to convert a titanium electrode into a high-performance anode for MFCs, in situ growth of titanium dioxide nanotubes (TNs) on its surface. After TN modification, the titanium surface became rougher, more hydrophilic, and more conducive for anodic biofilm formation. The maximal current density achieved on this TN-modified titanium electrode was 12.7 A m⁻², which was 190-fold higher than that of the bare titanium electrode and even higher than that of the most commonly used carbon felt electrode. Therefore, the high conductivity, corrosion resistance, and current density make the TN-modified titanium electrode a promising and scalable anode for MFCs.
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- Journal
- Environmental Science & Technology Letters
- Year
- 2016