Novel NbCo-MOF as an advanced peroxymonosulfate catalyst for organic pollutants removal: Growth, performance and mechanism study

Zengzhiqiang Li; Shunyan Ning; Hao Zhu; Xinpeng Wang; Xiangbiao Yin; Toyohisa Fujita; Yuezhou Wei

doi:10.1016/j.chemosphere.2021.132600

Novel NbCo-MOF as an advanced peroxymonosulfate catalyst for organic pollutants removal: Growth, performance and mechanism study

Chemosphere. 2022 Feb;288(Pt 2):132600. doi: 10.1016/j.chemosphere.2021.132600. Epub 2021 Oct 16.

Authors

Zengzhiqiang Li¹, Shunyan Ning², Hao Zhu¹, Xinpeng Wang¹, Xiangbiao Yin³, Toyohisa Fujita¹, Yuezhou Wei⁴

Affiliations

¹ Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR China.
² Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials, School of Resources, Environment and Materials, Guangxi University, Nanning, 530004, PR China. Electronic address: ningshunyan@gxu.edu.cn.
³ School of Nuclear Science and Technology, University of South China, 28 Changsheng West Road, Hengyang, 421001, PR China. Electronic address: yinxb@usc.edu.cn.
⁴ School of Nuclear Science and Technology, University of South China, 28 Changsheng West Road, Hengyang, 421001, PR China.

PMID: 34666073
DOI: 10.1016/j.chemosphere.2021.132600

Abstract

Multivariate metal-organic frameworks (MTV-MOFs) are expected as catalyst to apply to the advanced oxidation processes (AOPs) based on sulfate radical (SO₄·^-) to treat wastewater containing organic pollutants. Mixing metals de novo method was combined with stringent solvothermal conditions to synthesize macaroon-like NbCo-MOF catalyst. NbCo-MOF catalyst prepared with different atom ratios and growth time presented various morphology, structure, performance, and distinctive MTV-MOFs growth law which were confirmed by SEM, TEM, EDS, XRD, FTIR, raman spectra and UV-vis spectra. Besides, optimum peroxymonosulfate (PMS) catalytic activation conditions were studied. Furthermore, the effects of anions (Cl^-, NO₃^-, HCO₃^-, and C₂O₄^2-) on NbCo-MOF catalytic activation were explored which were proved very limited. Particularly, the Co²⁺/Co³⁺ cycle combining with the Nb⁴⁺/Nb⁵⁺ cycle for PMS activation were verified by XPS. EPR and quenching experiment results indicated exists non-radical pathway (¹O₂), but radical pathways are dominant (SO₄·^- O₂·^-, and ·OH). Moreover, the TC removal rate exhibited no significant reduce after three times run. Furthermore, NbCo-MOF exhibited excellent decomposing ability towards methylene blue, tylosin tartrate, rhodamine B, and tetracycline with the removal rate reaching to 100%, 98.4%, 99.7%, and 99.7% in 30 min respectively and also maintained good performance in actual water environment.

Keywords: NbCo-MOF; Peroxymonosulfate activation; Removal; Tetracycline.

MeSH terms

Catalysis
Environmental Pollutants*
Oxidation-Reduction
Peroxides

Substances

Environmental Pollutants
Peroxides
peroxymonosulfate