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Photocatalytic Fuel Cell Based on Zinc Oxide Loaded Carbon Plate Photoanode for Simultaneous Photocatalytic Degradation of Azo Dyes and Electricity Generation

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Abstract:

Photocatalytic fuel cell (PFC) is promising to own its synchronous degradation of organic pollutants with electricity generation under illumination of light. The oxidation and reduction process promote the conversion of chemical energy in the pollutants into electrical energy. In this study, PFC is driven by the electrode reactions between the zinc oxide loaded carbon plate (ZnO/C) photoanode and carbon plate cathode under irradiation of UVA light. The ZnO/C photoanode was successfully fabricated by using simple ultrasonication-annealed method and investigated by XRD, SEM and EDX. To investigate the capability of the PFC, reactive red 120 (RR120), congo red (CR) and acid orange 7 (AO7) are employed well compared among themselves. The results indicated that the molecular structure of azo dyes with different adsorption of light by dye itself, number of azo bonds and sulfonic groups can be the crucial factors of decolorization in the PFC. The photocatalytic fuel cell with AO7 as sacrificial agent was able to perform 82.43% of decolorization efficiency, a maximum short circuit current (JSC) of 0.0017 mA cm-2 and maximum power density (Pmax) of 0.0886 µW cm-2.

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Periodical:

Solid State Phenomena (Volume 301)

Pages:

175-182

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.301.175

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Online since:

March 2020

Authors:

Yong Por Ong*, Li Ngee Ho, Soon An Ong, Banjuraizah Johar, Abdul Haqi Ibrahim

Keywords:

Azo Dyes, Degradation, Electricity Generation, Photocatalytic Fuel Cell, Zinc Oxide

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© 2020 Trans Tech Publications Ltd. All Rights Reserved

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