Bismuth oxybromide/bismuth oxyiodide nanojunctions decorated on flexible carbon fiber cloth as easily recyclable photocatalyst for removing various pollutants from wastewater

Jiafeng Cai; Yan Zhang; Tianwei Qian; Xiaolong Li; Zhigang Chen; Lisha Zhang

doi:10.1016/j.jcis.2021.10.188

Bismuth oxybromide/bismuth oxyiodide nanojunctions decorated on flexible carbon fiber cloth as easily recyclable photocatalyst for removing various pollutants from wastewater

J Colloid Interface Sci. 2022 Feb 15;608(Pt 3):2660-2671. doi: 10.1016/j.jcis.2021.10.188. Epub 2021 Nov 3.

Authors

Jiafeng Cai¹, Yan Zhang², Tianwei Qian³, Xiaolong Li³, Zhigang Chen⁴, Lisha Zhang⁵

Affiliations

¹ State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China.
² State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China; Department of Environmental Engineering, School of Environmental and Geographical Science, Shanghai Normal University, Shanghai 200234, China.
³ State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
⁴ International Joint Laboratory for Advanced Fiber and Low Dimension Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China.
⁵ State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, China; State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350116, China. Electronic address: lszhang@dhu.edu.cn.

PMID: 34785056
DOI: 10.1016/j.jcis.2021.10.188

Abstract

Various semiconductor powders (such as bismuth oxybromide/bismuth oxyiodide (BiOBr/BiOI) nanojunctions) can photodegrade wastewater efficiently, but their practical application is limited by poor recovery performance. To address the problem, we report the construction of BiOBr/BiOI nanojunctions on flexible carbon fiber cloth (CFC) substrate as an easily recycled photocatalyst by the dipping-solvothermal-dipping-solvothermal four-step method. CFC/BiOBr/BiOI is composed of CFC substate and two layers of nanosheets, while BiOBr nanosheets (thickness: 10-30 nm, diameter: 200-400 nm) were grown in the inner layer and BiOI nanosheets (thickness: 50-80 nm, diameter:300-600 nm) were grown in the outer layer. CFC/BiOBr/BiOI (4 × 4 cm²) can effectively photodegrade 97.7% acid orange 7 (AO7), 91.3% levofloxacin (LVFX) and 97.8% tetracycline (TC) within 120 min under the illumination of visible-light, better than CFC/BiOBr (73.2% AO7, 71.6% LVFX and 81.6% TC). Furthermore, superoxide radical (•O₂^-) and hydroxyl radical (•OH) are the main active substances during removing LVFX by CFC/BiOBr/BiOI. Besides, CFC/BiOBr/BiOI can efficiently reduce 93.5% chemical oxygen demand (COD) concentration of acrylic resin production wastewater (ARPW) under visible-light illumination for 3 h, better than CFC/BiOBr (36.6% COD). Therefore, CFC/BiOBr/BiOI has broad application prospects in purifying wastewater as a new type of easily recycled photocatalyst.

Keywords: BiOBr/BiOI; Carbon fiber cloth; Easily recycled photocatalyst; Levofloxacin; Visible-light.

MeSH terms

Bismuth*
Carbon Fiber
Catalysis
Environmental Pollutants*
Wastewater

Substances

Carbon Fiber
Environmental Pollutants
Waste Water
bismuth oxybromide
Bismuth