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Synthesis of N-TiO2/BiOI/RGO composites with significantly enhanced visible light photocatalytic activity

Published online by Cambridge University Press:  28 January 2020

Limei Xue ,
Fengzhi An ,
Yanhao Yang  and
Yuan Ma
Limei Xue*
Affiliation:
School of Environment and Chemical Engineering, Heilongjiang University of Science & Technology, Harbin 150022, China
Fengzhi An*
Affiliation:
School of Environment and Chemical Engineering, Heilongjiang University of Science & Technology, Harbin 150022, China
Yanhao Yang
Affiliation:
Suzhou Lai School Education Technology Co. Ltd., Jiangsu, Suzhou 215000, China
Yuan Ma
Affiliation:
State Grid Xinyuan Compant Ltd., Jilin, Dunhua 133700, China
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
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Abstract

In this work, four N-TiO2/bismuth oxyiodide (BiOI)/reduced graphene oxide (RGO) composite photocatalysts with different composite ratios were prepared using a hydrothermal method. The phase, surface structure, specific surface area, and light response were characterized by X-ray diffraction, X-ray photoelectron spectrum analysis, scanning electron microscopy, specific surface area and aperture analysis, and UV-vis diffuse reflection spectrum analysis. The results indicated that the N-TiO2/BiOI/RGO (NTGB) composite prepared with a mass ratio of 1:1:2 is a promising photocatalyst for the degradation of organic pollutants by using sunlight, with a specific surface area of 139.56 (m2/g), bandgap of 1.24 eV, and strong absorption with a smaller visible region. It has the best photocatalytic properties under visible light irradiation in the degradation of methylene blue (MB): the degradation rate of MB in the presence of light for 60 min reached 99.22%, and its photocatalytic performance was significantly higher than that of TiO2, N-TiO2, BiOI, N-TiO2/BiOI, BiOI/RGO, NTGB1, NTGB2, and NTGB4.

Keywords

N-TiO2/BiOI/RGOphotocatalytic propertyvisible lightmethylene blue
Type
Article
Information
Journal of Materials Research , Volume 35 , Issue 2 , 28 January 2020 , pp. 153 - 161
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Copyright
Copyright © Materials Research Society 2020

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Footnotes

Contributing Editor: Limei Xue

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