Preparation of immobilized Cu2O using microwave irradiation and its catalytic activity for bisphenol A: comparisons of Cu2O/H2O2 and visible-light/Cu2O/H2O2 systems

Author:

Kuo C. Y.1,Wu C. H.2,Wu J. T.2,Chen Y. C.1

Affiliation:

1. Department of Environmental and Safety Engineering, National Yunlin University of Science and Technology, Taiwan

2. Department of Chemical and Materials Engineering, National Kaohsiung University of Applied Sciences, 415 Chien Kung Road, Kaohsiung 807, Taiwan

Abstract

This study produced immobilized Cu2O via microwave irradiation. The surface properties of Cu2O were assessed by X-ray diffraction, scanning electron microscopy, and UV–vis spectroscopy. The catalytic activity of the generated Cu2O was examined for bisphenol (BPA) degradation in Cu2O/H2O2 and visible-light/Cu2O/H2O2 systems under various H2O2 concentrations. Cu2O can decompose H2O2 to generate radicals, similar to the Fenton-like process. The BPA degradation rate followed pseudo-first-order kinetics. The optimal H2O2 concentration was 30 mM and the BPA degradation rate under 30 mM H2O2 in the Cu2O/H2O2 and visible-light/Cu2O/H2O2 systems was 1.43 and 2.69 h−1, respectively. The original Cu2O partly oxidized into CuO in the visible-light/Cu2O/H2O2 system and the BPA degradation percentage declined to 51% from 100% after the fifth cycle.

Publisher

IWA Publishing

Subject

Water Science and Technology,Environmental Engineering

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