Highly efficient microwave-assisted Fenton degradation bisphenol A using iron oxide modified double perovskite intercalated montmorillonite composite nanomaterial as catalyst

Yin Wang; Ruotong Wang; Naipeng Lin; Yun Wang; Xiaodong Zhang

doi:10.1016/j.jcis.2021.03.046

Highly efficient microwave-assisted Fenton degradation bisphenol A using iron oxide modified double perovskite intercalated montmorillonite composite nanomaterial as catalyst

J Colloid Interface Sci. 2021 Jul 15:594:446-459. doi: 10.1016/j.jcis.2021.03.046. Epub 2021 Mar 15.

Authors

Yin Wang¹, Ruotong Wang¹, Naipeng Lin¹, Yun Wang¹, Xiaodong Zhang²

Affiliations

¹ School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China.
² School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China. Electronic address: fatzhxd@126.com.

PMID: 33774400
DOI: 10.1016/j.jcis.2021.03.046

Abstract

In this work, perovskite intercalated montmorillonite (MMT) composite catalyst loaded by different mass fraction iron oxide, xFe₂O₃/LaCu_0.5Co_0.5O₃-MMT_0.2 (x was the mass fraction of Fe₂O₃ and x = 0.02, 0.04, 0.06), were prepared by impregnation method, and their catalytic activity were evaluated by microwave induced catalytic degradation of bisphenol A (BPA). Fe₂O₃ had a certain absorption effect on microwave, which could enhance the absorption property of composite material, improve the catalytic activity of catalyst. XRD, SEM, XPS and vector network analysis were used to analysis the structure, morphology, surface element composition and microwave absorption performance of the composite catalyst. The results indicated that the sample had uniform structure, a larger specific surface, a higher ratio of O_ads/O_lat and excellent microwave absorption performance. The effects of microwave power, pH value and H₂O₂ dosage on the catalytic degradation performance were studied, and 0.04Fe₂O₃/LCCOM_0.2 had the most obvious effect on the removal of BPA. The possible reaction mechanisms were discussed by characterization and experimental results of free radical capture. The surface active sites of the catalyst could be excited by microwave to generate oxidative free radicals, which could degrade BPA through electron hole transport. Response surface methodology (RSM) was used to optimize the operation parameters for the 0.04Fe₂O₃/LCCOM_0.2-BPA microwave degradation system.

Keywords: BPA; Iron oxide; Microwave; Perovskite; RSM.