Hydrogen adsorption on mesoporous silica microtubules fabricated through the self-assembly of alpha-cyclodextrin and pluronic F127 surfactant

Sundeep H. Deulkar, Wei Hao Lai, Jow Lay Huang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Morphology of mesoporous silica has been transformed from spherical to ellipsoidal form due to the structure directing role of alpha-cyclodextrin. The product exhibits a well ordered pore structure as deciphered from the SAXRD and TEM measurements. SEM studies indicate that the samples without alpha-cyclodextrin possess a spherical form with diameters ranging from 1.5 micron to 2.5 micron. These are transformed into a cylindrical structure with aspect ratio ranging from 2.1 to 4.7. FTIR spectra reveal distinct peaks corresponding to Si-O linkage. The Brunauer-Emmett-Teller (BET) pore surface area and the pore size for the samples, range from 2.7 to 612 m2 / gm and 3.89 to 10.95 nm respectively. The formation mechanism of the elongated cylindrical mesoporous silica is proposed to occur based on the hydrophilic and hydrophobic nature existent within cyclic alpha - cyclodextrin. The stoichiometric quotient qexp captures the degree of inclusion of alpha - cyclodextrin in the Pluronic precursor. A plot of BET pore surface area vs. qexp , reveals that samples with similar qexp but with low TEOS concentration have higher BET pore surface area than those prepared with higher TEOS concentrations. This trend correlates with the hydrogen adsorption properties of the synthesized mesoporous samples, wherein samples with larger BET pore surface area, exhibit enhanced hydrogen adsorption capacity.

Original languageEnglish
Title of host publicationIEEE Nanotechnology Materials and Devices Conference, IEEE NMDC 2013
PublisherIEEE Computer Society
Pages53-58
Number of pages6
ISBN (Print)9781479933877
DOIs
Publication statusPublished - 2013 Jan 1
Event2013 IEEE 8th Nanotechnology Materials and Devices Conference, IEEE NMDC 2013 - Tainan, Taiwan
Duration: 2013 Oct 62013 Oct 9

Publication series

NameIEEE Nanotechnology Materials and Devices Conference, IEEE NMDC 2013

Other

Other2013 IEEE 8th Nanotechnology Materials and Devices Conference, IEEE NMDC 2013
CountryTaiwan
CityTainan
Period13-10-0613-10-09

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All Science Journal Classification (ASJC) codes

  • Mechanics of Materials

Cite this

Deulkar, S. H., Lai, W. H., & Huang, J. L. (2013). Hydrogen adsorption on mesoporous silica microtubules fabricated through the self-assembly of alpha-cyclodextrin and pluronic F127 surfactant. In IEEE Nanotechnology Materials and Devices Conference, IEEE NMDC 2013 (pp. 53-58). [6707453] (IEEE Nanotechnology Materials and Devices Conference, IEEE NMDC 2013). IEEE Computer Society. https://doi.org/10.1109/NMDC.2013.6707453