An α-Fe_(2)O_(3)/Circulating Fluidized Bed Fly Ash Based Geopolymer Composite Anode for Electrocatalytic Degradation of Indigo Carmine Dye Wastewater  

作　　者：Jiaqian Lei Yaojun Zhang Panyang He 

机构地区：[1]College of Materials Science and Engineering,Xi’an University of Architecture and Technology,Xi’an,710055,China

出　　处：《Journal of Renewable Materials》2021年第12期2277-2289,共13页可再生材料杂志（英文）

基　　金：This study was supported by the National Natural Science Foundation of China(No.21676209);Key Research Development Project of Shaanxi Province(No.2019GY-137);the Cultivating Fund of Excellent Doctorate Thesis of Xi’an University of Architecture and Technology(No.6040318008).

摘　　要：Geopolymers have been developed to various catalysts due to their advantages.However,low conductivity restricts their application in the electrocatalysis field.In this study,anα-Fe_(2)O_(3)/circulating fluidized bed fly ash based geopolymer(CFAG)composite anode was fabricated using a facile dip-coating method by loadingα-Fe_(2)O_(3) in the matrix of CFAG.The effects ofα-Fe_(2)O_(3) content on the composition,surface morphology and electrochemical performance ofα-Fe_(2)O_(3)/CFAG composite anode were investigated.The X-ray diffraction(XRD)and scanning electron microscope(SEM)results demonstrated thatα-Fe_(2)O_(3) was successfully inlaid with the surface of amorphous CFAG matrix.The electrochemical measurements indicated thatα-Fe_(2)O_(3)/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_(2)O_(3)/CFAG reached up 92.6%,and the degradation of indigo carmine followed pseudo-first-order kinetics.Furthermore,10α-Fe_(2)O_(3)/CFAG composite anode presented excellent stability after five cycles.The active hydroxyl radical was generated over theα-Fe_(2)O_(3)/CFAG composite anode,which acted as strong oxidizing agents in the electrocatalytic degradation process.

关 键 词：GEOPOLYMERS composite anode electrocatalytic oxidation dye degradation 

分 类 号：TB3[一般工业技术—材料科学与工程]