The oversolubility of methane gas in nano-confined water in nanoporous silica materials

Chih Cheng Liu; Hao Ju Chou; Chan Yi Lin; Damodar Janmanchi; Po Wen Chung; Chung Yuan Mou; Steve S.F. Yu; Sunney I. Chan

doi:10.1016/j.micromeso.2019.109793

The oversolubility of methane gas in nano-confined water in nanoporous silica materials

Chih Cheng Liu, Hao Ju Chou, Chan Yi Lin, Damodar Janmanchi, Po Wen Chung, Chung Yuan Mou, Steve S.F. Yu, Sunney I. Chan

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

The oversolubility of the non-polar methane (CH₄) gas in nano-confined liquid in nanoporous silica materials is investigated. A series of mesoporous silica materials with different pore sizes, pore volumes, and different amounts of nano-confined water (H₂O) are prepared using a pore-expanding reagent and surfactants of different chain-lengths, and the CH₄ absorption by the silica nano-materials is studied at 298 K under low CH₄ gas pressures. Analysis of the CH₄ absorption data reveals unequivocal evidence for oversolubility of CH₄ in the nano-confined H₂O of all the hydrated nano-materials. The solubility enhancements are several hundred fold relative to the CH₄ solubility in bulk H₂O. Interestingly, the enhancements are 25–30% higher when a tricopper cluster complex capable of efficient selective CH₄ oxidation under ambient conditions is immobilized into the nano-channels of the silica materials. This dramatic enhancement of the CH₄ solubility is attributed to specific CH₄ binding to the tricopper cluster complexes embedded within the mesopores of the nanoporous materials.

Original language	English
Article number	109793
Journal	Microporous and Mesoporous Materials
Volume	293
DOIs	https://doi.org/10.1016/j.micromeso.2019.109793
Publication status	Published - Feb 2020
Externally published	Yes

Keywords

Mesoporous silica nanoparticles
Methane oversolubility
Methane sorption
Nano-confined water
Nanoporous silica materials

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanics of Materials

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10.1016/j.micromeso.2019.109793

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title = "The oversolubility of methane gas in nano-confined water in nanoporous silica materials",

abstract = "The oversolubility of the non-polar methane (CH4) gas in nano-confined liquid in nanoporous silica materials is investigated. A series of mesoporous silica materials with different pore sizes, pore volumes, and different amounts of nano-confined water (H2O) are prepared using a pore-expanding reagent and surfactants of different chain-lengths, and the CH4 absorption by the silica nano-materials is studied at 298 K under low CH4 gas pressures. Analysis of the CH4 absorption data reveals unequivocal evidence for oversolubility of CH4 in the nano-confined H2O of all the hydrated nano-materials. The solubility enhancements are several hundred fold relative to the CH4 solubility in bulk H2O. Interestingly, the enhancements are 25–30% higher when a tricopper cluster complex capable of efficient selective CH4 oxidation under ambient conditions is immobilized into the nano-channels of the silica materials. This dramatic enhancement of the CH4 solubility is attributed to specific CH4 binding to the tricopper cluster complexes embedded within the mesopores of the nanoporous materials.",

keywords = "Mesoporous silica nanoparticles, Methane oversolubility, Methane sorption, Nano-confined water, Nanoporous silica materials",

author = "Liu, {Chih Cheng} and Chou, {Hao Ju} and Lin, {Chan Yi} and Damodar Janmanchi and Chung, {Po Wen} and Mou, {Chung Yuan} and Yu, {Steve S.F.} and Chan, {Sunney I.}",

note = "Funding Information: This work was supported by Academia Sinica , the Research Program on Nanoscience and Nanotechnology ( 2393-105-0200 ) and grants (to SSFY) from the “Taiwan{\textquoteright}s Deep Decarbonization Pathways towards a Sustainable Society” ( AS-KPQ-106-DDPP ). CCL acknowledges a postdoctoral fellowship from Academia Sinica, Taiwan . Publisher Copyright: {\textcopyright} 2019",

year = "2020",

month = feb,

doi = "10.1016/j.micromeso.2019.109793",

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volume = "293",

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T1 - The oversolubility of methane gas in nano-confined water in nanoporous silica materials

AU - Liu, Chih Cheng

AU - Chou, Hao Ju

AU - Lin, Chan Yi

AU - Janmanchi, Damodar

AU - Chung, Po Wen

AU - Mou, Chung Yuan

AU - Yu, Steve S.F.

AU - Chan, Sunney I.

N1 - Funding Information: This work was supported by Academia Sinica , the Research Program on Nanoscience and Nanotechnology ( 2393-105-0200 ) and grants (to SSFY) from the “Taiwan’s Deep Decarbonization Pathways towards a Sustainable Society” ( AS-KPQ-106-DDPP ). CCL acknowledges a postdoctoral fellowship from Academia Sinica, Taiwan . Publisher Copyright: © 2019

PY - 2020/2

Y1 - 2020/2

N2 - The oversolubility of the non-polar methane (CH4) gas in nano-confined liquid in nanoporous silica materials is investigated. A series of mesoporous silica materials with different pore sizes, pore volumes, and different amounts of nano-confined water (H2O) are prepared using a pore-expanding reagent and surfactants of different chain-lengths, and the CH4 absorption by the silica nano-materials is studied at 298 K under low CH4 gas pressures. Analysis of the CH4 absorption data reveals unequivocal evidence for oversolubility of CH4 in the nano-confined H2O of all the hydrated nano-materials. The solubility enhancements are several hundred fold relative to the CH4 solubility in bulk H2O. Interestingly, the enhancements are 25–30% higher when a tricopper cluster complex capable of efficient selective CH4 oxidation under ambient conditions is immobilized into the nano-channels of the silica materials. This dramatic enhancement of the CH4 solubility is attributed to specific CH4 binding to the tricopper cluster complexes embedded within the mesopores of the nanoporous materials.

AB - The oversolubility of the non-polar methane (CH4) gas in nano-confined liquid in nanoporous silica materials is investigated. A series of mesoporous silica materials with different pore sizes, pore volumes, and different amounts of nano-confined water (H2O) are prepared using a pore-expanding reagent and surfactants of different chain-lengths, and the CH4 absorption by the silica nano-materials is studied at 298 K under low CH4 gas pressures. Analysis of the CH4 absorption data reveals unequivocal evidence for oversolubility of CH4 in the nano-confined H2O of all the hydrated nano-materials. The solubility enhancements are several hundred fold relative to the CH4 solubility in bulk H2O. Interestingly, the enhancements are 25–30% higher when a tricopper cluster complex capable of efficient selective CH4 oxidation under ambient conditions is immobilized into the nano-channels of the silica materials. This dramatic enhancement of the CH4 solubility is attributed to specific CH4 binding to the tricopper cluster complexes embedded within the mesopores of the nanoporous materials.

KW - Mesoporous silica nanoparticles

KW - Methane oversolubility

KW - Methane sorption

KW - Nano-confined water

KW - Nanoporous silica materials

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The oversolubility of methane gas in nano-confined water in nanoporous silica materials

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