A new mild, clean and highly efficient method for the preparation of graphene quantum dots without by-products

We demonstrated that graphene oxide (GO) can be oxidized and cut into graphene quantum dots (GQDs) by hydroxyl radicals (˙OH), which is obtained by the catalytic decomposition of hydrogen peroxide (H O ) with a tungsten oxide nanowire (W O ) catalyst. The clean oxidizing agent (H O ) and the solid c...

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Bibliographic Details
Published inJournal of materials chemistry. B, Materials for biology and medicine Vol. 3; no. 34; pp. 6871 - 6876
Main Authors Zhu, Chong, Yang, Siwei, Wang, Gang, Mo, Runwei, He, Peng, Sun, Jing, Di, Zengfeng, Kang, Zhenhui, Yuan, Ningyi, Ding, Jianning, Ding, Guqiao, Xie, Xiaoming
Format Journal Article
LanguageEnglish
Published England 01.01.2015
Subjects
Byproducts
Catalysts
Cleaning
Graphene
Hydroxyl radicals
Imaging
Nanostructure
Quantum dots
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Summary:We demonstrated that graphene oxide (GO) can be oxidized and cut into graphene quantum dots (GQDs) by hydroxyl radicals (˙OH), which is obtained by the catalytic decomposition of hydrogen peroxide (H O ) with a tungsten oxide nanowire (W O ) catalyst. The clean oxidizing agent (H O ) and the solid catalyst lead to a simple GQD preparing method without any by-products. The obtained GQD aqueous solution can be directly applied to fluorescence imaging in vitro without any further purification. The effect of the W O catalyst on the ˙OH formation is discussed, and the size of GQDs can be controlled via changing the concentration of hydroxyl radicals.
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ISSN:2050-750X
2050-7518
DOI:10.1039/c5tb01093d