Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 601, Issue -, Pages 186-195Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.05.132
Keywords
InOOH; CdS quantum dots; Photocatalytic reduction; Nitro aromatics; Visible light
Categories
Funding
- National Natural Science Foundation of China [21405069, 21373049]
- Excellent Talents programme of Liaoning Provincial Universities (Department of Education of Liaoning Province) [LJQ2015068]
- Natural Science Foundation of Liaoning Province [20170540371, 201602339]
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The study successfully synthesized CdS quantum dots-decorated InOOH and demonstrated their excellent activity and stability in photocatalytic reduction of nitro aromatics. It sheds light on the development of novel visible light photocatalysts for efficient reduction of nitro aromatics.
For the first time, CdS quantum dots (QDs)-decorated InOOH (CdS-In for short) was synthesized by a facile photodeposition method. The experiment results showed that CdS-In samples exhibited excellent activity and stability towards photocatalytic reduction of nitro aromatics. The conversion ratio of 4nitroaniline (4-NA) over CdS-In sample that was prepared with photodeposition time of 120 min (CdSIn-120) reached up to 99.4% under visible light irradiation for 40 min, which was even higher than that achieved over commercial CdS (86.2%). Besides the significant enhancement of visible light absorption, quantum sized CdS were decorated evenly on the surface of InOOH, which was very beneficial for the high activity. Furthermore, the heterogeneous junction formed at the interface of CdS QDs and InOOH can significantly increase the separation efficiency of photogenerated charge carriers. Active species control experiment and electron spin resonance (ESR) technique have proved that photogenerated electrons are the main active species towards photocatalytic reduction of nitro aromatics. It is anticipated that our study would offer meaningful insights for exploring novel InOOH-based visible light photocatalysts towards efficient reduction of nitro aromatics. (c) 2021 Elsevier Inc. All rights reserved.
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