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Title: Controlled Gas Exfoliation of Boron Nitride into Few-Layered Nanosheets

The controlled exfoliation of hexagonal boron nitride (h-BN) into single- or few-layered nanosheets remains a grand challenge and becomes the bottleneck to essential studies and applications of h-BN. Here, we present an efficient strategy for the scalable synthesis of few-layered h-BN nanosheets (BNNS) via a novel gas exfoliation of bulk h-BN in liquid N 2 (L-N 2). The essence of this strategy lies in the combination of a high temperature triggered expansion of bulk h-BN and the cryogenic L-N 2 gasification to exfoliate the h-BN. The produced BNNS after ten cycles (BNNS-10) consisted primarily of fewer than five atomic layers with high a mass yield of 16~20%. N 2 sorption and desorption isotherms show that the BNNS-10 exhibited a much higher specific surface area of 278 m 2/g –1 than that of bulk BN (10 m 2/g –1). Through the investigation of the exfoliated intermediates combined with a theoretical calculation, we found that the huge temperature variation initiates the expansion and curling of the bulk h-BN. Subseqently, the L-N 2 penetrates into the interlayers of h-BN along the curling edge, followed by an immediate drastic gasification of L-N 2, further peeling off h-BN. In conclusion, this novel gas exfoliation ofmore » high surface area BNNS not only opens up potential opportunities for wide applications, but also can be extended to produce other layered materials with high yeilds.« less
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [3] ;  [4] ;  [2] ;  [3] ;  [2] ;  [5]
  1. Jiangsu Univ., Zhenjiang (China); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Jiangsu Univ., Zhenjiang (China)
  4. Univ. of Tennessee, Knoxville, TN (United States)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Angewandte Chemie (International Edition)
Additional Journal Information:
Journal Name: Angewandte Chemie (International Edition); Journal Volume: 55; Journal Issue: 36; Journal ID: ISSN 1433-7851
Publisher:
Wiley
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; exfoliation; nanosheets; boron nitride; liquid nitrogen; thermal expansion
OSTI Identifier:
1324184

Zhu, Wenshuai, Gao, Xiang, Li, Qian, Li, Hongping, Chao, Yanhong, Li, Meijun, Mahurin, Shannon M., Li, Huaming, Zhu, Huiyuan, and Dai, Sheng. Controlled Gas Exfoliation of Boron Nitride into Few-Layered Nanosheets. United States: N. p., Web. doi:10.1002/anie.201605515.
Zhu, Wenshuai, Gao, Xiang, Li, Qian, Li, Hongping, Chao, Yanhong, Li, Meijun, Mahurin, Shannon M., Li, Huaming, Zhu, Huiyuan, & Dai, Sheng. Controlled Gas Exfoliation of Boron Nitride into Few-Layered Nanosheets. United States. doi:10.1002/anie.201605515.
Zhu, Wenshuai, Gao, Xiang, Li, Qian, Li, Hongping, Chao, Yanhong, Li, Meijun, Mahurin, Shannon M., Li, Huaming, Zhu, Huiyuan, and Dai, Sheng. 2016. "Controlled Gas Exfoliation of Boron Nitride into Few-Layered Nanosheets". United States. doi:10.1002/anie.201605515. https://www.osti.gov/servlets/purl/1324184.
@article{osti_1324184,
title = {Controlled Gas Exfoliation of Boron Nitride into Few-Layered Nanosheets},
author = {Zhu, Wenshuai and Gao, Xiang and Li, Qian and Li, Hongping and Chao, Yanhong and Li, Meijun and Mahurin, Shannon M. and Li, Huaming and Zhu, Huiyuan and Dai, Sheng},
abstractNote = {The controlled exfoliation of hexagonal boron nitride (h-BN) into single- or few-layered nanosheets remains a grand challenge and becomes the bottleneck to essential studies and applications of h-BN. Here, we present an efficient strategy for the scalable synthesis of few-layered h-BN nanosheets (BNNS) via a novel gas exfoliation of bulk h-BN in liquid N2 (L-N2). The essence of this strategy lies in the combination of a high temperature triggered expansion of bulk h-BN and the cryogenic L-N2 gasification to exfoliate the h-BN. The produced BNNS after ten cycles (BNNS-10) consisted primarily of fewer than five atomic layers with high a mass yield of 16~20%. N2 sorption and desorption isotherms show that the BNNS-10 exhibited a much higher specific surface area of 278 m2/g–1 than that of bulk BN (10 m2/g–1). Through the investigation of the exfoliated intermediates combined with a theoretical calculation, we found that the huge temperature variation initiates the expansion and curling of the bulk h-BN. Subseqently, the L-N2 penetrates into the interlayers of h-BN along the curling edge, followed by an immediate drastic gasification of L-N2, further peeling off h-BN. In conclusion, this novel gas exfoliation of high surface area BNNS not only opens up potential opportunities for wide applications, but also can be extended to produce other layered materials with high yeilds.},
doi = {10.1002/anie.201605515},
journal = {Angewandte Chemie (International Edition)},
number = 36,
volume = 55,
place = {United States},
year = {2016},
month = {7}
}

Works referenced in this record:

Liquid Exfoliation of Layered Materials
journal, June 2013
  • Nicolosi, V.; Chhowalla, M.; Kanatzidis, M. G.
  • Science, Vol. 340, Issue 6139, p. 1226419
  • DOI: 10.1126/science.1226419

Electric Field Effect in Atomically Thin Carbon Films
journal, October 2004

Graphene: Status and Prospects
journal, June 2009

Hunting for Monolayer Boron Nitride: Optical and Raman Signatures
journal, January 2011
  • Gorbachev, Roman V.; Riaz, Ibtsam; Nair, Rahul R.
  • Small, Vol. 7, Issue 4, p. 465-468
  • DOI: 10.1002/smll.201001628

Two-Dimensional Nanosheets Produced by Liquid Exfoliation of Layered Materials
journal, February 2011

Large Scale Growth and Characterization of Atomic Hexagonal Boron Nitride Layers
journal, August 2010
  • Song, Li; Ci, Lijie; Lu, Hao
  • Nano Letters, Vol. 10, Issue 8, p. 3209-3215
  • DOI: 10.1021/nl1022139