Highly efficient preparation of hexagonal boron nitride by direct microwave heating for dye removal

• Published in: Journal of materials science Vol. 54; no. 12; pp. 8852 - 8859
• Main Authors: Shen, Tiantian, Liu, Song, Yan, Wenjun, Wang, Jigang
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.06.2019; Springer; Springer Nature B.V
• Subjects: Adsorption; ambient temperature; Boric acid; Boron nitride; Carbon fibers; catalysts; Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Crystallography and Scattering Methods; Diffraction; Electron microscopes; Fourier transform infrared spectroscopy; Fourier transforms; Functional groups; Heating; Materials Science; Melamine; Methylene blue; Microwave absorbers; Microwave heating; microwave radiation; moieties; Morphology; Photoelectrons; Polymer Sciences; Raw materials; Room temperature; scanning electron microscopes; scanning electron microscopy; Solid Mechanics; Spectrum analysis; surface area; X ray photoelectron spectroscopy; X-ray diffraction; X-ray spectroscopy; X-rays
• ISSN: 0022-2461; 1573-4803
• DOI: 10.1007/s10853-019-03514-8

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 m 2  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.