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

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Abstract

We report a facile method for the synthesis of water soluble MoO3−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).

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

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Article information


Submitted
02 Jul 2020
Accepted
26 Aug 2020
First published
27 Aug 2020

Nanoscale Horiz., 2020, Advance Article
Article type
Communication

Ultra-fast synthesis of water soluble MoO3−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, Advance Article , DOI: 10.1039/D0NH00394H

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