期刊
JOURNAL OF MATERIALS CHEMISTRY B
卷 3, 期 34, 页码 6871-6876出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5tb01093d
关键词
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资金
- National Science and Technology Major Project [2011ZX02707]
- National Natural Science Foundation of China [61136005]
- Chinese Academy of Sciences [KGZD-EW-303]
- Jiangsu Province Cultivation base for State Key Laboratory of Photovoltaic Science and Technology [201508]
- Jiangsu Province Industry-University-Research joint innovation fund [BY2013024-01]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [14KJA430001]
We demonstrated that graphene oxide (GO) can be oxidized and cut into graphene quantum dots (GQDs) by hydroxyl radicals ((OH)-O-center dot), which is obtained by the catalytic decomposition of hydrogen peroxide (H2O2) with a tungsten oxide nanowire (W18O49) catalyst. The clean oxidizing agent (H2O2) 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 W18O49 catalyst on the (OH)-O-center dot formation is discussed, and the size of GQDs can be controlled via changing the concentration of hydroxyl radicals.
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