Ultra-fast synthesis of water soluble MoO3−x quantum dots with controlled oxygen vacancies and their near infrared fluorescence sensing to detect H2O2

Shichuan Zhong; Changchang Xing; An Cao; Tao Zhang; Xuejiao Li; Jie Yu; Weiping Cai; Yue Li

doi:10.1039/D0NH00394H

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Ultra-fast synthesis of water soluble MoO_3−x quantum dots with controlled oxygen vacancies and their near infrared fluorescence sensing to detect H₂O₂†

Shichuan Zhong,^a Changchang Xing,^a An Cao,^a Tao Zhang,^a Xuejiao Li,^a Jie Yu,^a Weiping Cai

^a and Yue Li

*^a

Author affiliations

* Corresponding authors

^a Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, Anhui, P. R. China
E-mail: yueli@issp.ac.cn

Abstract

We report a facile method for the synthesis of water soluble MoO_3−x quantum dots (QDs) at room temperature by injecting hydrochloric acid and mercaptosuccinic acid into ammonium molybdate solution within 5 seconds. The optical properties and oxygen vacancy concentration of the QDs could be well controlled by the competitive absorption of a carboxyl group and sulfhydryl group of the ligand with QDs by coordination interaction. The obtained QDs could be used as near infrared region (NIR) fluorescence probes to detect hydrogen peroxide with a low detection limit (3 nM).

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Article information

DOI: https://doi.org/10.1039/D0NH00394H
Article type: Communication
Submitted: 02 Jul 2020
Accepted: 26 Aug 2020
First published: 27 Aug 2020

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Nanoscale Horiz., 2020,5, 1538-1543

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Ultra-fast synthesis of water soluble MoO_3−x quantum dots with controlled oxygen vacancies and their near infrared fluorescence sensing to detect H₂O₂

S. Zhong, C. Xing, A. Cao, T. Zhang, X. Li, J. Yu, W. Cai and Y. Li, Nanoscale Horiz., 2020, 5, 1538 DOI: 10.1039/D0NH00394H

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