Boron Carbon Nitride Nanostructures from Salt Melts: Tunable Water-Soluble Phosphors

A simple, high yield, chemical process is developed to fabricate layered h-BN nanosheets and BCNO nanoparticles with a diameter of ca. 5 nm at 700 °C. The use of the eutectic LiCl/KCl salt melt medium enhances the kinetics of the reaction between sodium borohydride and urea or guanidine as well as t...

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Bibliographic Details
Published inJournal of the American Chemical Society Vol. 133; no. 18; pp. 7121 - 7127
Main Authors Lei, Weiwei, Portehault, David, Dimova, Rumiana, Antonietti, Markus
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 11.05.2011
Subjects
Borohydrides - chemistry
Boron Compounds - chemistry
Chemical Sciences
Lithium Chloride - chemistry
Luminescence
Material chemistry
Nanoparticles - chemistry
Particle Size
Phosphorus - chemistry
Potassium Chloride - chemistry
Salts - chemistry
Solubility
Water - chemistry
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Summary:A simple, high yield, chemical process is developed to fabricate layered h-BN nanosheets and BCNO nanoparticles with a diameter of ca. 5 nm at 700 °C. The use of the eutectic LiCl/KCl salt melt medium enhances the kinetics of the reaction between sodium borohydride and urea or guanidine as well as the dispersion of the nanoparticles in water. The carbon content can be tuned from 0 to 50 mol % by adjusting the reactant ratio, thus providing precise control of the light emission of the particles in the range 440–528 nm while reaching a quantum yield of 26%. Because of their green synthesis, low toxicity, small size, and stability against aggregation in water, the as-obtained photoluminescent BCNO nanoparticles show promise for diagnostics and optoelectronics.
ISSN:0002-7863
1520-5126
DOI:10.1021/ja200838c