Application of nickel foam-supported Co3O4-Bi2O3 as a heterogeneous catalyst for BPA removal by peroxymonosulfate activation

Limin Hu; Guangshan Zhang; Meng Liu; Qiao Wang; Shuying Dong; Peng Wang

doi:10.1016/j.scitotenv.2018.08.003

Application of nickel foam-supported Co₃O₄-Bi₂O₃ as a heterogeneous catalyst for BPA removal by peroxymonosulfate activation

Sci Total Environ. 2019 Jan 10:647:352-361. doi: 10.1016/j.scitotenv.2018.08.003. Epub 2018 Aug 2.

Authors

Limin Hu¹, Guangshan Zhang², Meng Liu¹, Qiao Wang¹, Shuying Dong³, Peng Wang⁴

Affiliations

¹ State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
² State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address: gszhanghit@gmail.com.
³ School of Environment, Henan Normal University, Xinxiang, Henan 453007, China.
⁴ State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China. Electronic address: pwang73@vip.sina.com.

PMID: 30081372
DOI: 10.1016/j.scitotenv.2018.08.003

Abstract

Nickel foam (NF)-functionalized Co₃O₄-Bi₂O₃ nanoparticles (CBO@NF) synthesized using a facile one-step microwave-assistant method were employed as catalysts to activate peroxymonosulfate (PMS) with bisphenol A (BPA) as the target pollutant. The crystallinity, morphology, and chemical valence state of the synthesized CBO@NF were analyzed using XRD, SEM, and XPS, respectively. Moreover, effects of the preparation parameters, including the calcination temperature and calcination time as well as the loading dosage, were evaluated in detail. A degradation efficiency of 95.6% was achieved within 30 min with the optimal degradation system. The CBO@NF/PMS system shows great catalytic activity in a pH range from 3.0 to 11.0. The stability and reusability of the CBO@NF supported catalyst was evaluated through a recycling experiment. In addition, the possible degradation mechanism was also explored using a quenching experiment and electron paramagnetic resonance (EPR) detection. The result shows that both the surface-bound SO₄^- and OH play significant roles during the degradation process, where the electron transfer of Co²⁺/Co³⁺, Bi³⁺/Bi⁵⁺, and Ni²⁺/Ni³⁺ realizes the sustained regeneration of the active radicals. This work provides new insight for the practical applications of sulfate radical-based advanced oxidation processes (SR-AOPs) in wastewater treatment.

Keywords: Co(3)O(4)-Bi(2)O(3); Nickel foam; Peroxymonosulfate; Practical application; Supported catalyst.