Volume 58, Issue 31 pp. 10626-10630
Communication

Construction of a Nanoporous Highly Crystalline Hexagonal Boron Nitride from an Amorphous Precursor for Catalytic Dehydrogenation

Dr. Hao Chen

Dr. Hao Chen

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831 USA

Department of Chemistry, The University of Tennessee, Knoxville, TN, 37996 USA

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Dr. Zhenzhen Yang

Corresponding Author

Dr. Zhenzhen Yang

Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831 USA

Department of Chemistry, The University of Tennessee, Knoxville, TN, 37996 USA

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Zihao Zhang

Zihao Zhang

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

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Zitao Chen

Zitao Chen

Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831 USA

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Miaofang Chi

Miaofang Chi

Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831 USA

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Song Wang

Song Wang

Department of Chemistry, University of California, Riverside, CA, 92521 USA

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Dr. Jie Fu

Corresponding Author

Dr. Jie Fu

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027 China

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Dr. Sheng Dai

Corresponding Author

Dr. Sheng Dai

Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831 USA

Department of Chemistry, The University of Tennessee, Knoxville, TN, 37996 USA

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First published: 03 June 2019
Citations: 65

Graphical Abstract

Highly crystalline nanoporous hexagonal boron nitride nanosheets (h-BNNS) were prepared using amorphous h-BN precursors through a dissolution–precipitation/crystallization process in the presence of magnesium. The crystalline h-BNNS is a catalyst for the dehydrogenation of dodecahydro-N-ethylcarbazole.

Abstract

Hexagonal boron nitride (h-BN) is regarded as a graphene analogue and exhibits important characteristics and vast application potentials. However, discovering a facile method for the preparation of nanoporous crystalline h-BN nanosheets (h-BNNS) is still a challenge. Herein, a novel and simple route for the conversion of amorphous h-BN precursors into highly crystalline h-BNNS was achieved through a successive dissolution–precipitation/crystallization process in the presence of magnesium. The h-BNNS has high crystallinity, high porosity with a surface area of 347 m2 g−1, high purity, and enhanced thermal stability. Improved catalytic performance of crystalline h-BNNS was evidenced by its much higher catalytic efficiency in the dehydrogenation of dodecahydro-N-ethylcarbazole, compared with its amorphous h-BN precursor, as well as other precious-metal-loaded heterogeneous catalysts.

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