Nanoporous foam fabricated by dealloying AgAl thin film through supercritical fluid corrosion

Y. C. Liu; J. C. Huang; X. Wang; M. T. Tsai; Z. K. Wang

doi:10.1039/c8ra00463c

Nanoporous foam fabricated by dealloying AgAl thin film through supercritical fluid corrosion

Y. C. Liu^*
, J. C. Huang
, X. Wang
, M. T. Tsai
, Z. K. Wang

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

7 Citations (Scopus)

75 Downloads (CityUHK Scholars)

Abstract

In this research, nanoporous silver foams are fabricated through dealloying Ag₃₅Al₆₅ (as atomic percentage, at%) thin films in supercritical (SC) carbon dioxide. The supercritical CO₂ is mixed with either HCl, water or H₂C₂O₄ aqueous solution as the solute in the reaction chamber. Due to the low tension of the supercritical fluid, under the best operating conditions, the surface area of the as-dealloyed Ag₃₅Al₆₅ can reach 4.6 m² g^-1, and the porosity volume fraction value can reach 74%, with a smallest average pore size of around 75 nm. In an optimum supercritical CO₂ environment, a lower chemical concentration can be applied and it can take less time to form a uniform nanoporous structure.

Original language	English
Pages (from-to)	13075-13082
Journal	RSC Advances
Volume	8
Issue number	24
Online published	9 Apr 2018
DOIs	https://doi.org/10.1039/c8ra00463c
Publication status	Published - 2018

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title = "Nanoporous foam fabricated by dealloying AgAl thin film through supercritical fluid corrosion",

abstract = "In this research, nanoporous silver foams are fabricated through dealloying Ag35Al65 (as atomic percentage, at\%) thin films in supercritical (SC) carbon dioxide. The supercritical CO2 is mixed with either HCl, water or H2C2O4 aqueous solution as the solute in the reaction chamber. Due to the low tension of the supercritical fluid, under the best operating conditions, the surface area of the as-dealloyed Ag35Al65 can reach 4.6 m2 g-1, and the porosity volume fraction value can reach 74\%, with a smallest average pore size of around 75 nm. In an optimum supercritical CO2 environment, a lower chemical concentration can be applied and it can take less time to form a uniform nanoporous structure.",

author = "Liu, \{Y. C.\} and Huang, \{J. C.\} and X. Wang and Tsai, \{M. T.\} and Wang, \{Z. K.\}",

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language = "English",

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pages = "13075--13082",

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T1 - Nanoporous foam fabricated by dealloying AgAl thin film through supercritical fluid corrosion

AU - Liu, Y. C.

AU - Huang, J. C.

AU - Wang, X.

AU - Tsai, M. T.

AU - Wang, Z. K.

PY - 2018

Y1 - 2018

N2 - In this research, nanoporous silver foams are fabricated through dealloying Ag35Al65 (as atomic percentage, at%) thin films in supercritical (SC) carbon dioxide. The supercritical CO2 is mixed with either HCl, water or H2C2O4 aqueous solution as the solute in the reaction chamber. Due to the low tension of the supercritical fluid, under the best operating conditions, the surface area of the as-dealloyed Ag35Al65 can reach 4.6 m2 g-1, and the porosity volume fraction value can reach 74%, with a smallest average pore size of around 75 nm. In an optimum supercritical CO2 environment, a lower chemical concentration can be applied and it can take less time to form a uniform nanoporous structure.

AB - In this research, nanoporous silver foams are fabricated through dealloying Ag35Al65 (as atomic percentage, at%) thin films in supercritical (SC) carbon dioxide. The supercritical CO2 is mixed with either HCl, water or H2C2O4 aqueous solution as the solute in the reaction chamber. Due to the low tension of the supercritical fluid, under the best operating conditions, the surface area of the as-dealloyed Ag35Al65 can reach 4.6 m2 g-1, and the porosity volume fraction value can reach 74%, with a smallest average pore size of around 75 nm. In an optimum supercritical CO2 environment, a lower chemical concentration can be applied and it can take less time to form a uniform nanoporous structure.

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DO - 10.1039/c8ra00463c

M3 - RGC 21 - Publication in refereed journal

C2 - 35542559

SN - 2046-2069

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EP - 13082

JO - RSC Advances

JF - RSC Advances

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Nanoporous foam fabricated by dealloying AgAl thin film through supercritical fluid corrosion

Abstract

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