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- Publisher Website: 10.1016/j.micromeso.2021.111426
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Article: Mesoporous silica nanosphere-based oxygen scavengers
Title | Mesoporous silica nanosphere-based oxygen scavengers |
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Authors | |
Keywords | Mesoporous silica ALD Oxygen scavenger |
Issue Date | 2021 |
Publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/micromeso |
Citation | Microporous and Mesoporous Materials, 2021, v. 327, article no. 111426 How to Cite? |
Abstract | We synthesized mesoporous silica nanospheres (MSNs) with small particle size (under 100 nm) and large surface areas (>800 m2/g) by modified Stöber method. We investigated coating of oxygen adsorber materials (iron-based and titania-based) by atomic layer deposition on the prepared MSNs. We found that MSNs without any coating are capable of adsorbing oxygen by physisorption, and that due to their high surface areas they can outperform commercial oxygen scavengers for atmospheres with moderate and low humidity levels. Their performance is further enhanced for optimized thickness of FeOx or TiOx coating, where chemisorption contributes to oxygen scavenging process. To further investigate the oxygen adsorption on MSNs, samples with different annealing times were prepared and characterized, and the oxygen adsorption could be attributed to incomplete removal of silicon precursor residue. While the samples with prolonged annealing time do not exhibit oxygen adsorption, the high oxygen adsorption capacity can be restored by glucose treatment which results in carbon-based surface coating of MSNs. Due to their fast response and high oxygen adsorption capacity, the prepared materials are highly promising as oxygen scavengers, in particular for applications in dry environments where humidity activation is undesirable. |
Persistent Identifier | http://hdl.handle.net/10722/306424 |
ISSN | 2023 Impact Factor: 4.8 2023 SCImago Journal Rankings: 0.941 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | He, Y | - |
dc.contributor.author | Hu, X | - |
dc.contributor.author | Xu, M | - |
dc.contributor.author | Ng, AMC | - |
dc.contributor.author | Djurišić, AB | - |
dc.date.accessioned | 2021-10-22T07:34:25Z | - |
dc.date.available | 2021-10-22T07:34:25Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Microporous and Mesoporous Materials, 2021, v. 327, article no. 111426 | - |
dc.identifier.issn | 1387-1811 | - |
dc.identifier.uri | http://hdl.handle.net/10722/306424 | - |
dc.description.abstract | We synthesized mesoporous silica nanospheres (MSNs) with small particle size (under 100 nm) and large surface areas (>800 m2/g) by modified Stöber method. We investigated coating of oxygen adsorber materials (iron-based and titania-based) by atomic layer deposition on the prepared MSNs. We found that MSNs without any coating are capable of adsorbing oxygen by physisorption, and that due to their high surface areas they can outperform commercial oxygen scavengers for atmospheres with moderate and low humidity levels. Their performance is further enhanced for optimized thickness of FeOx or TiOx coating, where chemisorption contributes to oxygen scavenging process. To further investigate the oxygen adsorption on MSNs, samples with different annealing times were prepared and characterized, and the oxygen adsorption could be attributed to incomplete removal of silicon precursor residue. While the samples with prolonged annealing time do not exhibit oxygen adsorption, the high oxygen adsorption capacity can be restored by glucose treatment which results in carbon-based surface coating of MSNs. Due to their fast response and high oxygen adsorption capacity, the prepared materials are highly promising as oxygen scavengers, in particular for applications in dry environments where humidity activation is undesirable. | - |
dc.language | eng | - |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/micromeso | - |
dc.relation.ispartof | Microporous and Mesoporous Materials | - |
dc.subject | Mesoporous silica | - |
dc.subject | ALD | - |
dc.subject | Oxygen scavenger | - |
dc.title | Mesoporous silica nanosphere-based oxygen scavengers | - |
dc.type | Article | - |
dc.identifier.email | Djurišić, AB: dalek@hku.hk | - |
dc.identifier.authority | Djurišić, AB=rp00690 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.micromeso.2021.111426 | - |
dc.identifier.scopus | eid_2-s2.0-85114698279 | - |
dc.identifier.hkuros | 328951 | - |
dc.identifier.volume | 327 | - |
dc.identifier.spage | article no. 111426 | - |
dc.identifier.epage | article no. 111426 | - |
dc.identifier.isi | WOS:000703753100005 | - |
dc.publisher.place | Netherlands | - |