Preparation and characterisation of boron nitride whiskers

Zhao, Li; Zhang, Y. J.; Gong, Hongyu

doi:10.1179/143307510x12639910071917

Cited by 5 publications

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“…The contact angle (CA) and zeta-potential of the obtained BN are also measured to explore its surface property. It is known that h-BN is naturally hydrophobic [15]. However, Figure 7a shows the sample obtained in our work is partially hydrophilic, which could result from the existence of -OH/-NH 2 groups [35].…”

Section: Adsorption Performance Of Flake Bnmentioning

confidence: 67%

“…Therefore, BN exhibits excellent adsorption properties for a wide range of oils, solvents, and dyes [10][11][12]. Various synthetic methods have already been adopted to prepare porous BN, such as carbothermal reduction nitridation [13], vapor deposition [14], direct combination of boron and nitrogen [15], and hard template-based methods [16], etc. In addition to these traditional methods, other methods were also developed to synthesize BN recently.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Flake Boron Nitride Prepared from the Low Temperature Combustion Synthesized Precursor and Its Application for Dye Adsorption

Luo

et al. 2018

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Flake boron nitride (BN) in large yield was successfully synthesized at low temperature from the combustion synthesized precursor. The precursor was prepared by a low-temperature (350 • C) combustion synthesis (LCS) method using nitric acid (HNO 3), urea (CO(NH 2) 2), boric acid (H 3 BO 3), and glucose (C 6 H 12 O 6 •H 2 O) as starting materials. The precursor consists of B 2 O 3 and amorphous carbon and the morphology is composed of blocks with average diameters of about 10 µm by statistical methods using SEM at different fields. Then BN was synthesized at 900 • C in NH 3 at a heating rate of 5 • C min −1. The as-prepared BN possesses a flake morphology and high specific surface area up to 936 m 2 g −1. It also has high density structural defects and abundant-NH 2 /-OH groups. The surface groups improve its water wettability and electronegativity, which contributes to the rapid and selective adsorption performance, especially towards the cationic dyes. When 4 mg of the sample was added into a 100 mL RhB solution with an initial concentration of 5 mg L −1 , 95% of the RhB was removed within 1 min and the adsorption capacity is 125 mg g −1. Importantly, the sample can be regenerated by heating at 400 • C in air.

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Section: Adsorption Performance Of Flake Bnmentioning

confidence: 67%