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Few-Layered Graphene-like Boron Nitride: A Highly Efficient Adsorbent for Indoor Formaldehyde Removal
journal contribution
posted on 2016-12-07, 00:00 authored by Jiawei Ye, Xiaofeng Zhu, Bei Cheng, Jiaguo Yu, Chuanjia JiangHighly porous boron nitride (BN)
composed of a flexible network
of hexagonal BN nanosheets was synthesized via thermal treatment of
a boric acid/urea mixture. The as-prepared sponge-like BN displayed
fast adsorption rates and ultrahigh adsorption capacities for gaseous
formaldehyde (HCHO), e.g., 19 mg/g in equilibrium with approximately
20 ppm of HCHO in air, which is an order of magnitude higher than
those of other tested materials, including commercial hexagonal BN
and various metal oxides. The superb HCHO adsorption performance of
the porous BN is mainly due to its large specific surface area (627
m2/g), as well as the abundant surface hydroxyl and amine
groups. Moreover, chemisorption can occur on the BN layers and contribute
to the high HCHO uptake capacity via Cannizzaro-type disproportionation
reactions, during which HCHO is transformed into less toxic formic
acid and methanol. This porous BN is a promising adsorbent for indoor
HCHO removal and may serve as the support for highly efficient HCHO
decomposition catalysts.
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as-prepared sponge-like BNIndoor Formaldehyde RemovalEfficient Adsorbentboron nitrideHCHO removalBN layersHCHO decomposition catalystsmetal oxidessurface hydroxylamine groupsadsorption ratesFew-Layered Graphene-like Boron Nitrideformic acidultrahigh adsorption capacitiesHCHO uptake capacity20 ppmBN nanosheetsCannizzaro-type disproportionation reactionsHCHO adsorption performance
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