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An advanced electro-Fenton degradation system with triboelectric nanogenerator as electric supply and biomass-derived carbon materials as cathode catalyst
Nano Energy ( IF 17.6 ) Pub Date : 2017-12-18 , DOI: 10.1016/j.nanoen.2017.12.021
Shuyan Gao , Miao Wang , Ye Chen , Miao Tian , Yingzheng Zhu , Xianjun Wei , Tao Jiang

On the basis of the advantages of electro-Fenton (EF) and the flexible design of triboelectric nanogenerator (TENG) and biomass carbon materials, a self-powered EF system is conceived, which is self-driven by a flexible multilayered TENG (FM-TENG) using carbon materials derived from long bean as the cathode catalyst for oxygen reduction. The synthesized carbon material is promising electrocatalyst due to its macro-/meso-porous structure, large surface area (2270 m2 g−1), high nitrogen content and superhydrophilicity, which can facilitate dissolved O2 mass transfer and promote the oxygen reduction. The instantaneous short-circuit current, transferred charge and open-circuit voltage of FM-TENG could reach 650 μA, 1.7 μC and 750 V, respectively, corresponding to an instantaneous power density of 2.6 W m−2 (500 kΩ). Driven by FM-TENG, 4-dimethylaminoazobenzene can be decomposed to CO2 and inorganic ions by hydroxyl radical (•OH) generated via EF process. Cyclic voltammogram, gas chromatograph-mass spectrometer, UV–vis spectra and the H2O2 measurement together disclose such degradation mechanism in single-compartment cell (S-cell) and double-compartment cell (D-cell). Here, S-cell is preferable owing to the high efficiency, simple setup and low voltage. This provides a proof-of-concept of an innovative EF process using biomass-derived carbon materials as oxygen reduction electrocatalyst and FM-TENG as the electric supply to power the degradation of organic pollutants.



中文翻译:

先进的电动芬顿降解系统,以摩擦电纳米发电机为电源,生物质衍生的碳材料为阴极催化剂

基于电子芬顿(EF)的优势以及摩擦式纳米发电机(TENG)和生物质碳材料的灵活设计,设计了一种自供电的EF系统,该系统由柔性多层TENG(FM- TENG)使用长豆衍生的碳材料作为还原氧的阴极催化剂。合成的碳材料具有大/中孔结构,大表面积(2270 m 2  g -1),高氮含量和超亲水性,可以促进溶解的O 2,因此有望成为电催化剂。传质并促进氧气还原。FM-TENG的瞬时短路电流,转移的电荷和开路电压分别可以达到650μA,1.7μC和750 V,对应于2.6 W m -2(500kΩ)的瞬时功率密度。在FM-TENG的驱动下,4-二甲基氨基偶氮苯可通过EF工艺产生的羟基自由基(•OH)分解为CO 2和无机离子。循环伏安图,气相色谱-质谱仪,UV-vis光谱和H 2 O 2一起的测量揭示了单隔室(S-cell)和双隔室(D-cell)中的这种降解机理。在此,由于高效率,简单的设置和低电压,S-cell是优选的。这提供了一种创新的EF工艺的概念验证,该工艺使用源自生物质的碳材料作为氧还原电催化剂,并使用FM-TENG作为电源来驱动有机污染物的降解。

更新日期:2017-12-18
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