title: Self-Powered Electrochemical Oxidation of 4-Aminoazobenzene Driven by a Triboelectric Nanogenerator.
abstract: A rotary disc-structured triboelectric nanogenerator (rd-TENG) on the basis of free-standing electrification has been designed, where the aluminum composite panel has not been tailored to the stator becauseit is commercially available and cost-effective, has good electronic conductivity, and is easily processed. With the rotating speed increasing from 200 to 1000 rpm, the short-circuit current (Isc) is sharply enhanced from 50 μA to 200 μA, while the measured open-circuit voltage (Voc) and transferred charge (Qtr) almost keep constant, 600 V and 0.4 μC, respectively. The matched load for the rd-TENG at a rotating speed of 600 rpm is 2.7 MΩ, generating a maximum power of 19.75 mW, which corresponds to a maximum power density of 2.28 W m-2. Using the electric power generated by such a rd-TENG, highly toxic and carcinogenic 4-aminoazobenzene can be selectively treated to produce CO2or an oligomer via reasonably controlling electrochemical oxidation potentials. The underlying mechanism is tentatively proposed based on the cyclic voltammogram, gas chromatograph-mass spectrometer, electrochemical impedance spectroscopy, and UV-vis spectra. Here the electrochemical degradation in a single-compartment cell is more valid, preferable, and feasible. The output Vocand rectified current of rd-TENG guarantee its extensive application to self-power electrochemical degradation of other azo compounds, i.e., 2-(4-dimethylaminophenylazo) benzoic acid, to CO2. This work suggests that rd-TENG, sustainable energy, can be feasibly designed to self-power a practical electrochemical treatment of dyeing wastewater by harvesting vibration energy.
authors.affiliation: School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P.R. China.
authors.forename: Shuyan
authors.initials: S
authors.lastname: Gao
authors.affiliation: School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P.R. China.
authors.forename: Jingzhen
authors.initials: J
authors.lastname: Su
authors.affiliation: School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P.R. China.
authors.forename: Xianjun
authors.initials: X
authors.lastname: Wei
authors.affiliation: School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P.R. China.
authors.forename: Miao
authors.initials: M
authors.lastname: Wang
authors.affiliation: School of Chemistry and Chemical Engineering, Henan Normal University , Xinxiang, Henan 453007, P.R. China.
authors.forename: Miao
authors.initials: M
authors.lastname: Tian
authors.affiliation: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences , Beijing 100083, P. R. China.
authors.forename: Tao
authors.initials: T
authors.lastname: Jiang
authors.affiliation: Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences , Beijing 100083, P. R. China.|School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332-0245, United States.
authors.forename: Zhong Lin
authors.identifier: 0000-0002-5530-0380
authors.initials: ZL
authors.lastname: Wang
keywords: 4-aminoazobenzene; free-standing; rotary disc structure; self-power; triboelectric nanogenerator