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An α-Fe2O3/Circulating Fluidized Bed Fly Ash Based Geopolymer Composite Anode for Electrocatalytic Degradation of Indigo Carmine Dye Wastewater

Jiaqian Lei, Yaojun Zhang*, Panyang He

College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an, 710055, China

* Corresponding Author: Yaojun Zhang. Email: email

(This article belongs to the Special Issue: Current Advances in Green Nanomaterials Applications)

Journal of Renewable Materials 2021, 9(12), 2277-2289. https://doi.org/10.32604/jrm.2021.015824

Abstract

Geopolymers have been developed to various catalysts due to their advantages. However, low conductivity restricts their application in the electrocatalysis field. In this study, an α-Fe2O3/circulating fluidized bed fly ash based geopolymer (CFAG) composite anode was fabricated using a facile dip-coating method by loading α-Fe2O3 in the matrix of CFAG. The effects of α-Fe2O3 content on the composition, surface morphology and electrochemical performance of α-Fe2O3/CFAG composite anode were investigated. The X-ray diffraction (XRD) and scanning electron microscope (SEM) results demonstrated that α-Fe2O3 was successfully inlaid with the surface of amorphous CFAG matrix. The electrochemical measurements indicated that α-Fe2O3/CFAG composite anode had higher oxygen evolution potential, greater electrochemical activity area, and smaller electrochemical impedance than CFAG. The as-prepared composite anode was applied for electrocatalytic degradation of indigo carmine dye wastewater. It was discovered that the highest degradation efficiency over 10α-Fe2O3/CFAG reached up 92.6%, and the degradation of indigo carmine followed pseudo-first-order kinetics. Furthermore, 10α-Fe2O3/ CFAG composite anode presented excellent stability after five cycles. The active hydroxyl radical was generated over the α-Fe2O3/CFAG composite anode, which acted as strong oxidizing agents in the electrocatalytic degradation process.

Graphical Abstract

An α-Fe<sub>2</sub>O<sub>3</sub>/Circulating Fluidized Bed Fly Ash Based Geopolymer Composite Anode for Electrocatalytic Degradation of Indigo Carmine Dye Wastewater

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APA Style
Lei, J., Zhang, Y., He, P. (2021). An α-fe<sub>2</sub>o<sub>3</sub>/circulating fluidized bed fly ash based geopolymer composite anode for electrocatalytic degradation of indigo carmine dye wastewater. Journal of Renewable Materials, 9(12), 2277-2289. https://doi.org/10.32604/jrm.2021.015824
Vancouver Style
Lei J, Zhang Y, He P. An α-fe<sub>2</sub>o<sub>3</sub>/circulating fluidized bed fly ash based geopolymer composite anode for electrocatalytic degradation of indigo carmine dye wastewater. J Renew Mater. 2021;9(12):2277-2289 https://doi.org/10.32604/jrm.2021.015824
IEEE Style
J. Lei, Y. Zhang, and P. He "An α-Fe<sub>2</sub>O<sub>3</sub>/Circulating Fluidized Bed Fly Ash Based Geopolymer Composite Anode for Electrocatalytic Degradation of Indigo Carmine Dye Wastewater," J. Renew. Mater., vol. 9, no. 12, pp. 2277-2289. 2021. https://doi.org/10.32604/jrm.2021.015824

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cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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