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Issue 8, 2020
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In situ assembly of CQDs/Bi2WO6 for highly efficient photocatalytic degradation of VOCs under visible light

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Abstract

A series of carbon quantum dot (CQD)/Bi2WO6 hybrid materials were synthesized via a facile in situ hydrothermal method, where the CQDs were prepared using different carbon sources. As demonstrated by multiple techniques, including XRD, SEM, TEM, XPS, BET, UV-vis, FT-IR, PL and TPR, the visible light absorption wavelength red-shifted, the oxidation ability was enhanced, and the recombination probability of electron–hole pairs was inhibited by incorporating the CQDs in Bi2WO6. Moreover, different carbon source-derived CQD/Bi2WO6 materials exhibited different optical and electronic properties. The CQD/Bi2WO6 materials exhibited excellent activity in the photocatalytic degradation of VOCs under visible light irradiation, among which the CQDs/Bi2WO6 derived from chitosan demonstrated the best activity with 96.9% degradation for gaseous toluene and 97.1% for gaseous formaldehyde within only 120 min. Furthermore, the CQDs/Bi2WO6 showed high stability and reusability.

Graphical abstract: In situ assembly of CQDs/Bi2WO6 for highly efficient photocatalytic degradation of VOCs under visible light

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Supplementary files

Article information


Submitted
01 Oct 2019
Accepted
27 Jan 2020
First published
28 Jan 2020

New J. Chem., 2020,44, 3455-3462
Article type
Paper

In situ assembly of CQDs/Bi2WO6 for highly efficient photocatalytic degradation of VOCs under visible light

Y. Liu, C. Zhu, J. Sun, Y. Ge, F. Song and Q. Xu, New J. Chem., 2020, 44, 3455
DOI: 10.1039/C9NJ04957F

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