Synthesis of BiOBr/Ag3PO4 heterojunctions on carbon-fiber cloth as filter-membrane-shaped photocatalyst for treating the flowing antibiotic wastewater

Zhun Shi; Yan Zhang; Ting Liu; Wei Cao; Lisha Zhang; Maoquan Li; Zhigang Chen

doi:10.1016/j.jcis.2020.04.077

Synthesis of BiOBr/Ag₃PO₄ heterojunctions on carbon-fiber cloth as filter-membrane-shaped photocatalyst for treating the flowing antibiotic wastewater

J Colloid Interface Sci. 2020 Sep 1:575:183-193. doi: 10.1016/j.jcis.2020.04.077. Epub 2020 Apr 25.

Authors

Zhun Shi¹, Yan Zhang², Ting Liu², Wei Cao², Lisha Zhang³, Maoquan Li⁴, Zhigang Chen⁵

Affiliations

¹ Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China; College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
² College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China.
³ College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China. Electronic address: lszhang@dhu.edu.cn.
⁴ Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China.
⁵ Department of Interventional and Vascular Surgery, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, China; College of Materials Science and Engineering, Donghua University, Shanghai 201620, China. Electronic address: zgchen@dhu.edu.cn.

PMID: 32361235
DOI: 10.1016/j.jcis.2020.04.077

Abstract

Numerous nanosized photocatalysts have been demonstrated to treat antibiotic solutions efficiently in beakers, but plenty of antibiotics have been discharged to the flowing rivers. For photocatalytically degrading the flowing antibiotic wastewater, the prerequisite is to develop flexible large-scale filter-membrane with high photocatalytic activity. To solve this issue, with carbon fiber (CF) cloth as a flexible porous substrate, herein we have reported the in-situ growth of BiOBr/Ag₃PO₄ heterostructures. BiOBr nanosheets (thickness: ~10 nm, diameter: 0.5-1 μm) and Ag₃PO₄ particles (size: 50-200 nm) are synthesized on CF cloth successively via a solvothermal-chemical deposition two-step strategy. CF/BiOBr/Ag₃PO₄ cloth displays excellent visible photoabsorption (edge: ~520 nm). Under visible-light illumination, CF/BiOBr/Ag₃PO₄ cloth (4 × 4 cm²) could degrade ~90.0% tetracycline hydrochloride (TCH) as a model of antibiotics in 30 min in a beaker. Especially, CF/BiOBr/Ag₃PO₄ cloth can be used as the filter-membrane to construct multiple photocatalytic-setup for degrading the flowing antibiotic wastewater. The removal efficiency of TCH goes up from 12.8% at the first grade to 89.6% at the sixth grade. Furthermore, the photocatalytic mechanism of CF/BiOBr/Ag₃PO₄ cloth and the possible decomposition pathway of TCH have been proposed based on simulation and experiment results. Therefore, the present work provides some insight for developing flexible filter-membrane-shaped photocatalysts for degrading the flowing wastewater.

Keywords: Antibiotics; BiOBr/Ag(3)PO(4); Carbon fiber cloth; Filter-membrane; Flowing wastewater.

MeSH terms

Anti-Bacterial Agents / chemical synthesis
Anti-Bacterial Agents / chemistry*
Bismuth / chemistry*
Carbon Fiber / chemistry*
Catalysis
Molecular Structure
Particle Size
Phosphates / chemistry*
Photochemical Processes
Silver Compounds / chemistry*
Surface Properties
Wastewater / chemistry*
Water Microbiology
Water Purification*

Substances

Anti-Bacterial Agents
Carbon Fiber
Phosphates
Silver Compounds
Waste Water
bismuth oxybromide
Bismuth
silver phosphate