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Method for constructing nano porous high crystalline hexagonal boron nitride from amorphous precursor

2021-07-26 11:14:07
a

Single-layer or few-layer hexagonal boron nitride (h-BN) is a graphene-like material with important characteristics and broad application prospects. However, so far, the bottleneck of the simple and large-scale preparation of porous h-BN crystal nanosheets (BNNSs) has become a thorny issue that limits its application and performance development. Chen et al. of Zhejiang University and their collaborators realized the transformation from amorphous h-BN to highly crystalline BNNSs by realizing a controlled continuous dissolution-precipitation/crystallization process at high temperature in the presence of magnesium. The experimental process is as follows: first mix the h-BN precursor with magnesium powder, then seal the mixture in a stainless steel tube and treat it at 900°C under a nitrogen atmosphere; after washing to remove the magnesium, crystallized BNNSs are obtained with a yield of 88% ( By weight). The prepared BNNSs have high crystallinity and high porosity, with a surface area of up to 347 m2 g-1, high purity and good thermal stability. Compared with amorphous h-BN precursors and other noble metal-supported heterogeneous catalysts, the highly crystalline, high-porosity BNNSs have higher catalytic efficiency in the dehydrogenation reaction of dodecahydro-N-ethylcarbazole. Explains the excellent characteristics of its catalytic performance.

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Sales
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Telephone: 15940764666

Landline: 0417-3902111

Website: www.yklbhg.com

Address: No. 517, Xiangyang Chemical Industry Park, Laobian District, Yingkou City, Liaoning Province

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Fax: 0417-3902118

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Address: No. 517, Xiangyang Chemical Industry Park, Laobian District, Yingkou City, Liaoning Province

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