Enhancement of azo dye degradation and power generation in a photoelectrocatalytic microbial fuel cell by simple cathodic reduction on titania nanotube arrays electrode
Enhancement of azo dye degradation and power generation in a photoelectrocatalytic microbial fuel cell by simple cathodic reduction on titania nanotube arrays electrode
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DOI：
10.1016/j.jpowsour.2019.01.069
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发表时间：
2019-03-01
影响因子：
9.2
通讯作者：
Li, Xianning
中科院分区：
文献类型：
--
作者：
Long, Xizi;Wang, Hui;Li, Xianning
该研究为微生物燃料电池和微电流处理污染物提供了一种简单的高性能电极制备方法。采用阴极还原法合成了蓝色二氧化钛纳米管阵列微生物燃料电池电极。结果表明，这些阵列显着增加了生物阳极处的发电量，从3.64 +/- 0.112 mA增加到6.246 +/- 0.135 mA。较高的载体浓度（4.70 × 10 ~（24）cm ~（-3））、表观电子传递速率常数（21.69 ms ~（-1））和对1352 Ω电阻的急剧下降为电活性细菌积累提供了更好的条件。将蓝色二氧化钛纳米管阵列应用于光微生物燃料电池的阳极和阴极，可以有效地光电催化降解偶氮染料。偶氮染料及其中间产物的降解归因于染料的电子还原和自由基的氧化。
The research provides a simple method for high-performance electrode preparation for use with a microbial fuel cell and microcurrent to treat pollutants. Blue titania nanotube arrays as a new microbial fuel cell electrode is synthesized by cathodic reduction. The results show that these arrays remarkably increase the electricity generation from 3.64 +/- 0.112 mA to 6.246 +/- 0.135 mA at the bioanode. A higher carrier concentration of 4.70 x 10(24) cm(-3), an apparent electron transfer rate constants of 21.69 ms(-1) and drastic decrease in resistance to 1352 Omega provide better conditions for electroactive bacteria accumulation. The application of blue titania nanotube arrays to both the anode and cathode results in a photo-microbial fuel cell capable of efficient photoelectrocatalytic degradation of azo dye. The degradation of the azo dye and its intermediate products is attributed to electronic reduction of the dye and oxidation by free radicals.