Highly efficient preparation of hexagonal boron nitride by direct microwave heating for dye removal
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Within 40 min, hexagonal boron nitride (h-BN) was rapidly synthesized via microwave heating without using catalyst and protective gas. Melamine and boric acid were used as raw materials, and carbon fiber was utilized as microwave absorber, respectively. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy and scanning electron microscope (SEM) were used to characterize the structures and morphologies of the samples. Results indicated that the whisker-like h-BN with diameters of 200–500 nm and lengths of 15–25 μm were successfully obtained. The specific surface area of the product was 510.941 m2 g−1. The maximum adsorption capacity for methylene blue solution of the as-obtained h-BN was high up to ~ 230 mg g−1 at room temperature. The excellent adsorption performance of the samples may be attributed to the oxygen-containing functional groups and defects formed during the high-energy microwave irradiation.
This work is supported by Program for New Century Excellent Talents in University, China (NECT-12-0119), the Key Project and Youth Project of Science and Technology of Tibet Autonomous Region, China (XZ2017ZRG-66(Z), XZ2017ZRG-49(Z)), and the Fundamental Research Funds for the Central Universities.
- 10.Lei WW et al (2013) Porous boron nitride nanosheets for effective water cleaning. Nat Commun 4. https://doi.org/10.1038/ncomms2818