Nanoscale structure and superhydrophobicity of sp2-bonded boron nitride aerogels

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

doi:10.1039/c5nr01672j

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

Journal Article · Tue May 19 00:00:00 UTC 2015 · Nanoscale

DOI: https://doi.org/10.1039/c5nr01672j · OSTI ID:2007259

Pham, Thang ^[1]; Goldstein, Anna P. ^[1]; Lewicki, James P. ^[2]; Kucheyev, Sergei O. ^[2]; Wang, Cheng ^[3]; Russell, Thomas P. ^[4]; Worsley, Marcus A. ^[2]; Woo, Leta ^[2]; Mickelson, William ^[5]; Zettl, Alex ^[1]

Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
Univ. of Massachusetts, Amherst, MA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Univ. of California, Berkeley, CA (United States)

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.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

Sponsoring Organization:: National Science Foundation (NSF); UC Lab Fees Research Program; US Air Force Office of Scientific Research (AFOSR); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC02-05CH11231; AC52-07NA27344

OSTI ID:: 2007259

Report Number(s):: LLNL--JRNL-736480; 888593

Journal Information:: Nanoscale, Journal Name: Nanoscale Journal Issue: 23 Vol. 7; ISSN 2040-3364

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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

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