@Article{jrm.2021.015824,
AUTHOR = {Jiaqian Lei, Yaojun Zhang, Panyang He},
TITLE = {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 = {Journal of Renewable Materials},
VOLUME = {9},
YEAR = {2021},
NUMBER = {12},
PAGES = {2277--2289},
URL = {http://www.techscience.com/jrm/v9n12/42993},
ISSN = {2164-6341},
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-Fe<sub>2</sub>O<sub>3</sub>/circulating fluidized bed fly ash
based geopolymer (CFAG) composite anode was fabricated using a facile dip-coating method by loading
α-Fe<sub>2</sub>O<sub>3</sub> in the matrix of CFAG. The effects of α-Fe<sub>2</sub>O<sub>3</sub> content on the composition, surface morphology and electrochemical performance of α-Fe<sub>2</sub>O<sub>3</sub>/CFAG composite anode were investigated. The X-ray diffraction (XRD) and
scanning electron microscope (SEM) results demonstrated that α-Fe<sub>2</sub>O<sub>3</sub> was successfully inlaid with the surface of
amorphous CFAG matrix. The electrochemical measurements indicated that α-Fe<sub>2</sub>O<sub>3</sub>/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-Fe<sub>2</sub>O<sub>3</sub>/CFAG reached
up 92.6%, and the degradation of indigo carmine followed pseudo-first-order kinetics. Furthermore, 10α-Fe<sub>2</sub>O<sub>3</sub>/
CFAG composite anode presented excellent stability after five cycles. The active hydroxyl radical was generated
over the α-Fe<sub>2</sub>O<sub>3</sub>/CFAG composite anode, which acted as strong oxidizing agents in the electrocatalytic degradation process.},
DOI = {10.32604/jrm.2021.015824}
}