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| Home > Publications database > Surfactant functionalised cobalt silica membranes – Gas permeation and thin film positron annihilation lifetime spectroscopy characterisation > print |
| Home > Publications database > Surfactant functionalised cobalt silica membranes – Gas permeation and thin film positron annihilation lifetime spectroscopy characterisation > print |
| 001 | 910145 | ||
| 005 | 20240711085625.0 | ||
| 024 | 7 | _ | |a 10.1016/j.memsci.2022.121040 |2 doi |
| 024 | 7 | _ | |a 0376-7388 |2 ISSN |
| 024 | 7 | _ | |a 1873-3123 |2 ISSN |
| 024 | 7 | _ | |a 2128/32068 |2 Handle |
| 024 | 7 | _ | |a WOS:000967940300007 |2 WOS |
| 037 | _ | _ | |a FZJ-2022-03634 |
| 082 | _ | _ | |a 570 |
| 100 | 1 | _ | |a Olguin, Gianni |0 P:(DE-HGF)0 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Surfactant functionalised cobalt silica membranes – Gas permeation and thin film positron annihilation lifetime spectroscopy characterisation |
| 260 | _ | _ | |a New York, NY [u.a.] |c 2022 |b Elsevier |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 336 | 7 | _ | |a Journal Article |b journal |m journal |0 PUB:(DE-HGF)16 |s 1666083574_30576 |2 PUB:(DE-HGF) |
| 336 | 7 | _ | |a ARTICLE |2 BibTeX |
| 336 | 7 | _ | |a JOURNAL_ARTICLE |2 ORCID |
| 336 | 7 | _ | |a Journal Article |0 0 |2 EndNote |
| 520 | _ | _ | |a This work investigates the use of positron annihilation lifetime spectroscopy (PALS) for the in-situ structural characterisation of silica derived thin film membranes. By using a quantified maximum entropy method, PALS allowed for the measurement of a pore size distribution depth profile. PALS measurements were carried out on a series of silica derived membranes where alumina supports were coated with four layers of cationic HTBA surfactant cobalt silica sols wherein the surfactant/cobalt molar ratio loading varied from 0 to 3. PALS results showed that the coated layers adjacent to the porous alumina substrate were characterised by micropores and broad mesopores, a clear indication that the porosity of the substrate affected the pore size at the substrate and thin film interface. The last coated layer resulted in a high concentration of ultra-micropores (dp < 6 Å). This was attributed to the surface smoothness conferred by three previous coated layers. Higher surfactant loadings resulted in an increase in gas permeation and reduction of He/CO2 permselectivity from 91.5 to 3.8. A strong correlation with R2 up to 0.999 was found between the ultra-micropores in the top layer and gas permselectivity, a clear indication that gas separation is controlled by small pore sizes. In this work, PALS showed to be a powerful tool for the characterisation of the structural features of thin films. |
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| 700 | 1 | _ | |a Yacou, Christelle |0 P:(DE-HGF)0 |b 1 |
| 700 | 1 | _ | |a Motuzas, J. |0 P:(DE-HGF)0 |b 2 |
| 700 | 1 | _ | |a Butterling, Maik |0 P:(DE-HGF)0 |b 3 |
| 700 | 1 | _ | |a Meulenberg, Wilhelm A. |0 P:(DE-Juel1)129637 |b 4 |u fzj |
| 700 | 1 | _ | |a Smart, Simon |0 P:(DE-HGF)0 |b 5 |
| 700 | 1 | _ | |a Diniz da Costa, João C. |0 P:(DE-HGF)0 |b 6 |e Corresponding author |
| 773 | _ | _ | |a 10.1016/j.memsci.2022.121040 |g p. 121040 - |0 PERI:(DE-600)1491419-0 |p 121040 - |t Journal of membrane science |v 664 |y 2022 |x 0376-7388 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/910145/files/MEMSCI-D-22-00405_R2%2015May22-1.pdf |y OpenAccess |
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