β-FeOOH catalyzed peroxymonosulfate for organic pollutant degradation in water: radical and non-radical mechanism

Lyu, Cong1,2; Ju, Lunan1,2; Yang, Xuejiao1,2; Song, Lan3; Liu, Ning4

2020

10.1007/s10854-020-03041-2

Journal of Materials Science: Materials in Electronics   影响因子和分区

1573482X

1573-482X

Iron-based catalysts as peroxymonosulfate (PMS) activator are commonly used to oxidize and degrade azo dye. However, there are still some issues such as low catalytic performance, relatively less reactive oxygen species and high metal iron dissolution. As such, a novel iron oxyhydroxide (FeOOHs) with four crystal form was synthesized and employed as efficient PMS activator for AO7 degradation in this study. It was found that the crystal form of catalyst had significant influence on its catalytic performance. β-FeOOH exhibited the best catalytic performance, owing to its smallest lattice size, maximum specific surface area and highest surface hydroxyl density. β-FeOOH/PMS system possessed a great high apparent reaction rate constant (1.3919 h⁻¹), which was about 17, 3, 31, 20, 14, 49 and 23 times higher than that in β-FeOOH/persulfate(PS), Fe⁰/PMS, Fe⁰/PS, Fe2O3/PMS, Fe2O3/PS, Fe3O4/PMS and Fe3O4/PS system, respectively. More importantly, radical quenching tests and Electron spin resonance (ESR) analysis revealed that OH^., SO4^.−, O2^.− and ¹O2 were involved in the reaction process. The catalytic mechanism proposed that β-FeOOH had the effective electron transfer rate performance, and Fe³⁺ underwent a reduction to Fe²⁺ during the β-FeOOH/PMS catalytic oxidation process. Then, the regeneration of Fe²⁺ on the hydroxylated surface of FeOOH promoted the formation of FeOH⁺, which was crucial for PMS activation and reactive oxygen species (ROS) generation. The recyclability tests proved good stability and reusability of β-FeOOH. This study provides a kind of new understanding of peroxymonosulfate activation for environmental remediation and advances the study of iron-based oxyhydroxide in heterogeneous catalysis.
© 2020, Springer Science+Business Media, LLC, part of Springer Nature.

SCI ; EI

英语

其他

Higher Education Discipline Innovation Project[] ; [20180101081JC] ; Education Department of Jilin Province[JJKH20190125KJ] ; State Key Laboratory of Rare Earth Resources Utilization[RERU2018014]

Engineering ; Materials Science ; Physics

Engineering, Electrical & Electronic ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000516054700005

Springer

20200708184847

Azo dyes ; Catalysis ; Catalysts ; Chemical activation ; Crystals ; Electron spin resonance spectroscopy ; Free radical reactions ; Hematite ; Magnetic moments ; Magnetite ; Organic pollutants ; Oxygen ; Quantum chemistry ; Rate constants ; Reactive oxygen species ; Reusability ; Water pollution ; Water treatment

Water Treatment Techniques:445.1 ; Water Pollution:453 ; Minerals:482.2 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Chemistry:801 ; Physical Chemistry:801.4 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Organic Compounds:804.1 ; Crystalline Solids:933.1

MATERIALS SCIENCE

Web of Science

1.Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun; 130026, China
2.Jilin Provincial Key Laboratory of Water Resources and Environment, Jilin University, Changchun; 130026, China
3.Southern University of Science and Technology, School of Environmental Science & Engineering, Shenzhen; 518000, China
4.China Northeast Municipal Engineering Design&Research Institute Co., Ltd, Changchun; 130026, China

Lyu, Cong,Ju, Lunan,Yang, Xuejiao,et al. β-FeOOH catalyzed peroxymonosulfate for organic pollutant degradation in water: radical and non-radical mechanism[J]. Journal of Materials Science: Materials in Electronics,2020,31(6):4797-4807.

Lyu, Cong,Ju, Lunan,Yang, Xuejiao,Song, Lan,&Liu, Ning.(2020).β-FeOOH catalyzed peroxymonosulfate for organic pollutant degradation in water: radical and non-radical mechanism.Journal of Materials Science: Materials in Electronics,31(6),4797-4807.

Lyu, Cong,et al."β-FeOOH catalyzed peroxymonosulfate for organic pollutant degradation in water: radical and non-radical mechanism".Journal of Materials Science: Materials in Electronics 31.6(2020):4797-4807.