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Title: Nanoscale structure and superhydrophobicity of sp2-bonded boron nitride aerogels

Abstract

Aerogels have much potential in both research and industrial applications due to their high surface area, low density, and fine pore size distribution. Here we report a thorough structural study of three-dimensional aerogels composed of highly crystalline sp2-bonded boron nitride (BN) layers synthesized by a carbothermic reduction process. The structure, crystallinity and bonding of the as-prepared BN aerogels are elucidated by X-ray diffraction, 11B nuclear magnetic resonance, transmission electron microscopy, and resonant soft X-ray scattering. The macroscopic roughness of the aerogel's surface causes it to be superhydrophobic with a contact angle of ~155° and exhibit high oil uptake capacity (up to 1500 wt%). In conclusion, the oil can be removed from the BN aerogel by oxidizing in air without damaging the crystalline porous structure of the aerogel or diminishing its oil absorption capacity.

Authors:
 [1];  [1];  [2];  [2];  [3];  [4];  [2];  [2];  [5];  [1]
+ Show Author Affiliations
  1. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  2. Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
  3. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  4. Univ. of Massachusetts, Amherst, MA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
  5. Univ. of California, Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); UC Lab Fees Research Program; USDOE Laboratory Directed Research and Development (LDRD) Program; US Air Force Office of Scientific Research (AFOSR); National Science Foundation (NSF)
OSTI Identifier:
2007259
Report Number(s):
LLNL-JRNL-736480
Journal ID: ISSN 2040-3364; 888593
Grant/Contract Number:  
AC52-07NA27344; AC02-05CH11231; 12-LR-235323; 13-LW-099; X10-8049-C; EEC-0832819
Resource Type:
Accepted Manuscript
Journal Name:
Nanoscale
Additional Journal Information:
Journal Volume: 7; Journal Issue: 23; Journal ID: ISSN 2040-3364
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; chemistry; BN foams; turbostratic BN; sorbent; oil absorption

Citation Formats

Pham, Thang, Goldstein, Anna P., Lewicki, James P., Kucheyev, Sergei O., Wang, Cheng, Russell, Thomas P., Worsley, Marcus A., Woo, Leta, Mickelson, William, and Zettl, Alex. Nanoscale structure and superhydrophobicity of sp2-bonded boron nitride aerogels. United States: N. p., 2015. Web. doi:10.1039/c5nr01672j.
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Pham, Thang, Goldstein, Anna P., Lewicki, James P., Kucheyev, Sergei O., Wang, Cheng, Russell, Thomas P., Worsley, Marcus A., Woo, Leta, Mickelson, William, & Zettl, Alex. Nanoscale structure and superhydrophobicity of sp2-bonded boron nitride aerogels. United States. https://doi.org/10.1039/c5nr01672j
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Pham, Thang, Goldstein, Anna P., Lewicki, James P., Kucheyev, Sergei O., Wang, Cheng, Russell, Thomas P., Worsley, Marcus A., Woo, Leta, Mickelson, William, and Zettl, Alex. Tue . "Nanoscale structure and superhydrophobicity of sp2-bonded boron nitride aerogels". United States. https://doi.org/10.1039/c5nr01672j. https://www.osti.gov/servlets/purl/2007259.
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@article{osti_2007259,
title = {Nanoscale structure and superhydrophobicity of sp2-bonded boron nitride aerogels},
author = {Pham, Thang and Goldstein, Anna P. and Lewicki, James P. and Kucheyev, Sergei O. and Wang, Cheng and Russell, Thomas P. and Worsley, Marcus A. and Woo, Leta and Mickelson, William and Zettl, Alex},
abstractNote = {Aerogels have much potential in both research and industrial applications due to their high surface area, low density, and fine pore size distribution. Here we report a thorough structural study of three-dimensional aerogels composed of highly crystalline sp2-bonded boron nitride (BN) layers synthesized by a carbothermic reduction process. The structure, crystallinity and bonding of the as-prepared BN aerogels are elucidated by X-ray diffraction, 11B nuclear magnetic resonance, transmission electron microscopy, and resonant soft X-ray scattering. The macroscopic roughness of the aerogel's surface causes it to be superhydrophobic with a contact angle of ~155° and exhibit high oil uptake capacity (up to 1500 wt%). In conclusion, the oil can be removed from the BN aerogel by oxidizing in air without damaging the crystalline porous structure of the aerogel or diminishing its oil absorption capacity.},
doi = {10.1039/c5nr01672j},
journal = {Nanoscale},
number = 23,
volume = 7,
place = {United States},
year = {Tue May 19 00:00:00 EDT 2015},
month = {Tue May 19 00:00:00 EDT 2015}
}
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https://doi.org/10.1039/c5nr01672j
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