Synergistic effect of various elements in Fe41Co7Cr15Mo14C15B6Y2 amorphous alloy hollow ball on catalytic degradation of methylene blue

• 作者: Wenhu Luo Qingjun Chen Li Ji Xinyuan Peng Guosheng Huang
• 来源期刊: 稀土学报（英文版）
• 年，卷（期）: 2022,（4）
• 所属期刊栏目: RARE EARTH CATALYSIS
• 页码范围: 605-615
• 页数: 11页
• 语种: 英文

摘要

Metallic glasses have recently attracted great attention in terms of degrading dyes and other organic pollutants as an environmentally friendly material for wastewater remediation.Herein,we report a new type of amorphous catalyst Fe41Co7Cr15Mo14C15B6Y2 hollow balls.Results demonstrate that the catalyst can still completely decolorize the 20 mg/L methylene blue(MB)solution after reused for 50 times under conditions of pH=5,catalyst content 0.5 g/L,and temperature 80℃.The catalyst is easily broken during degradation,so the inner surface also provides additional active sites.The Fe41Co7Cr15Mo14C15B6Y2 amorphous alloy hollow balls were characterized by energy dispersive X-ray specroscopy(EDS),scanning electron microscopy(SEM)and X-ray photoelectron spectroscopy(XPS),respectively.The elements in the catalytic system have a synergistic catalytic effect.Redox cycle Fe2+/Fe3+,Co2+/Co3+and Mo4+/Mo6+promote mutual conversion and accelerate the catalytic process of their reaction with H2O2,forming a self-stable redox cycle process.Among them,Fe2+promotes the conversion of Co3+to Co2+,and Mo4+promotes the conversion of Fe3+to Fe2+,mainly Fe2+and Co2+react with H2O2 to generate·OH.Mo and Cr elements form MoO2 and Cr2O3 plasma compounds on the surface,which act as a protective film to make the catalyst more stable and be repeated used more frequently.