Precursor-free synthesis of carbon quantum dots and carbon microparticles in supercritical acetone

IF 5.9 2区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Shunji Kurosu, Yuma Kaizuka, Kang Zhou, Haruki Yokota, Ryusuké Hashimoto, Keiichi Yanagisawa, Hirokazu Shimoshigé, Yuri Tanuma, Hisao Morimoto, Toru Maekawa
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引用次数: 0

Abstract

Carbon quantum dots (CQDs) have recently received a lot of attention due to their unique physical properties, and their environmentally friendly features such as low toxicity and high biocompatibility. Supercritical fluids, which possess unusual properties such as high solubility, high diffusivity, low viscosity and zero surface tension, are now commonly used particularly in the fields of electronic, chemical and materials science and engineering. Here, we synthesise carbon nano/microparticles in supercritical acetone, in which neither external molecules nor starting materials are dissolved/dispersed. We find that carbon microparticles and nano structures such as graphene quantum dots (GQDs), carbon nano onions (CNOs) and elongated carbon nano onions (eCNOs) are self-assembled via thermal decomposition of acetone under its supercritical conditions. We also find that the carbon microparticles are in fact formed by GQDs, CNOs and eCNOs, the microparticles being physically resolved into GQDs, CNOs and eCNOs with sonication. The fluorescence features of the carbon nano structures are clarified, noting that no photobleaching was observed for at least one month. The present result may well lead to the development of facile bottom-up methodologies for synthesising nano materials in solvents under their supercritical conditions without using any external precursors/starting materials. Carbon quantum dots are of interest for a range of applications thanks to their unique physical and eco-friendly properties, and facile bottom-up methods to synthesize these are thus in demand. Here, the authors report the bottom-up synthesis of carbon quantum dots and microparticles via the thermal decomposition of supercritical acetone, in the absence of any external precursors/starting materials

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来源期刊
Communications Chemistry
Communications Chemistry Chemistry-General Chemistry
CiteScore
7.70
自引率
1.70%
发文量
146
审稿时长
13 weeks
期刊介绍: Communications Chemistry is an open access journal from Nature Research publishing high-quality research, reviews and commentary in all areas of the chemical sciences. Research papers published by the journal represent significant advances bringing new chemical insight to a specialized area of research. We also aim to provide a community forum for issues of importance to all chemists, regardless of sub-discipline.
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