Activation of Peroxymonosulfate by Metal (Fe, Mn, Cu and Ni) Doping Ordered Mesoporous CoO for the Degradation of Enrofloxacin

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 May 11

PMID 35541444

Authors

Jing Deng

Chen Ya

Yongjian Ge

Yongqing Cheng

Yijing Chen

Mengyuan Xu

Hongyu Wang

Affiliations

Soon will be listed here.

Abstract

Various transition metals (Fe, Mn, Cu and Ni) were doped into ordered mesoporous CoO to synthesize CoO-composite spinels. Their formation was evidenced by transmission electronic microscopy (TEM), X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET) analysis. It was found that CoO-composite spinels could efficiently activate peroxymonosulfate (PMS) to remove enrofloxacin (ENR) and the catalytic activity followed the order CoO-CuCoO > CoO-CoMnO > CoO-CoFeO > CoO-NiCoO. Moreover, through the calculation of the specific apparent rate constant ( ), it can be proved that the Co and Cu ions had the best synergistic effect for PMS activation. The CoO-composite spinels presented a wide pH range for the activation of PMS, but strong acidic and alkaline conditions were detrimental to ENR removal. Higher reaction temperature could promote the PMS activation process. Sulfate radical was identified as the dominating reactive species in CoO-composite spinel/PMS systems through radical quenching experiments. Meanwhile, the probable mechanisms concerning CoO-composite spinel activated PMS were proposed.

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