Improvement of Photocatalytic Degradation and Adsorption of Ciprofloxacin by Bismuth Oxyiodide

Author:

Hai Nguyen Thi Thanh1ORCID,Tu Vu Van1,Long Pham Hai1,Hien Do Thi1,Huong Ngo Thi Thu1,Quynh Pham Huong2,Phuong Nguyen Thi Thu3,Viet Nguyen Minh4,Thang Phan Quang1

Affiliation:

1. Institute of Environmental Technology, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Nghia Do, Cau Giay 10000 Hanoi Vietnam

2. Hanoi University of Industry HaUI Institute of Technology 298 Cau Dien, Bac Tu Liem 10000 Hanoi Vietnam

3. Hanoi University of Industry Faculty of Chemical Technology 298 Cau Dien, Bac Tu Liem 10000 Hanoi Vietnam

4. University of Science, Vietnam National University VNU–Key Laboratory of Advanced Materials for Green Growth, Faculty of Chemistry 10000 Hanoi Vietnam

Abstract

AbstractBismuth oxyiodide (BiOI) hierarchical structures were fabricated by the solution route at room temperature (BiOI‐R) and solvothermal synthesis (BiOI‐S) in the presence of KI and ethylene glycol to improve the photocatalytic and adsorption ability for the removal of ciprofloxacin from the aqueous environment. BiOI was characterized by X‐ray diffraction, scanning electron microscopy, N2 adsorption‐desorption isotherm, UV‐Vis absorption spectroscopy, and pH of the point of zero charge. It was observed that BiOI‐S has better adsorption and photocatalysis capacity as a result of having higher surface area, higher light absorption ability, and lower band‐gap energy than BiOI‐R. BiOI‐S exhibited good ciprofloxacin adsorption and photocatalytic degradation under visible‐light irradiation. Adsorption isotherm and kinetic studies fitted the Langmuir and Freundlich isotherm and pseudo‐second‐order models respectively. The photocatalytic degradation of ciprofloxacin by BiOI‐S followed a pseudo‐first‐order reaction based on Langmuir‐Hinshelwood kinetics.

Funder

Vietnam Academy of Science and Technology

Publisher

Wiley

Subject

Industrial and Manufacturing Engineering,General Chemical Engineering,General Chemistry

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