Degradation of aniline by bismuth oxyiodide (BiOI) under visible light irradiation

Issue Date

6-2017

Abstract

Visible-light-driven porous spherical photocatalyst bismuth oxyiodide (BiOI) was successfully prepared by facial hydrothermal synthesis. The obtained catalyst was characterized using x-ray diffraction (XRD), ultraviolet-visible diffuse reflection (UV-Vis DRS) and scanning electron microscope (SEM). The experiment which used the visible-driven catalyst to degrade aniline wastewater investigated the effects of initial concentration of aniline and reaction time on the removal efficiency of aniline. The highest photodegradation efficiency of aniline was 97.3% with a BiOI dosage of 1 g L and initial and initial aniline concentration of 50 mg L after 2 h of visible light irradiation. The chemical oxygen demand (COD) of the solution decreased substantially and the high chemical oxygen demand removal efficiency achieved 71%. In addition, the investigation of different scavengers demonstrated that h⁺ and •Oˉ are the main reactive species in the photodegradation of aniline. The fate of nitrogen was investigated by ion chromatography. The high photodegradation and mineralization capability efficiency suggest BiOI is a promising photocatalyst for the degradation of organic pollution in the practical application.

Source or Periodical Title

Journal of Environmental Science and Management

ISSN

0119-1144

Volume

20

Issue

1

Page

18-25

Document Type

Article

College

School of Environmental Science and Management (SESAM)

Frequency

semi-annually

Physical Description

graphs, pictures

Language

English

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