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Article: Native defects in zno: Effect on dye adsorption and photocatalytic degradation
Title | Native defects in zno: Effect on dye adsorption and photocatalytic degradation |
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Authors | |
Issue Date | 2013 |
Publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/journals/jpccck/ |
Citation | Journal Of Physical Chemistry C, 2013, v. 117 n. 23, p. 12218-12228 How to Cite? |
Abstract | We investigated the influence of native defects on the adsorption and photocatalytic degradation of anionic and cationic dyes for different ZnO nanoparticles. We found that there was no relationship between the dye adsorption onto ZnO nanoparticles and their photocatalytic activity. Fast photocatalytic degradation could be observed for samples having a low concentration of nonradiative defects (and thus low recombination losses of photogenerated carriers), regardless of the amount of dye adsorbed onto the surface. While the absorption of cationic dyes was not significantly affected by ZnO nanoparticle properties, dye adsorption of several anionic dyes was strongly affected by native defects in ZnO. The defects involved in the dye adsorption are likely shallow donor centers exhibiting an electron spin resonance peak at g ≈ 1.957, resulting in positively charged sites at the surface. © 2013 American Chemical Society. |
Persistent Identifier | http://hdl.handle.net/10722/185485 |
ISSN | 2023 Impact Factor: 3.3 2023 SCImago Journal Rankings: 0.957 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Liu, F | en_US |
dc.contributor.author | Leung, YH | en_US |
dc.contributor.author | Djurišić, AB | en_US |
dc.contributor.author | Ng, AMC | en_US |
dc.contributor.author | Chan, WK | en_US |
dc.date.accessioned | 2013-07-30T07:36:53Z | - |
dc.date.available | 2013-07-30T07:36:53Z | - |
dc.date.issued | 2013 | en_US |
dc.identifier.citation | Journal Of Physical Chemistry C, 2013, v. 117 n. 23, p. 12218-12228 | en_US |
dc.identifier.issn | 1932-7447 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/185485 | - |
dc.description.abstract | We investigated the influence of native defects on the adsorption and photocatalytic degradation of anionic and cationic dyes for different ZnO nanoparticles. We found that there was no relationship between the dye adsorption onto ZnO nanoparticles and their photocatalytic activity. Fast photocatalytic degradation could be observed for samples having a low concentration of nonradiative defects (and thus low recombination losses of photogenerated carriers), regardless of the amount of dye adsorbed onto the surface. While the absorption of cationic dyes was not significantly affected by ZnO nanoparticle properties, dye adsorption of several anionic dyes was strongly affected by native defects in ZnO. The defects involved in the dye adsorption are likely shallow donor centers exhibiting an electron spin resonance peak at g ≈ 1.957, resulting in positively charged sites at the surface. © 2013 American Chemical Society. | en_US |
dc.language | eng | en_US |
dc.publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/journals/jpccck/ | en_US |
dc.relation.ispartof | Journal of Physical Chemistry C | en_US |
dc.title | Native defects in zno: Effect on dye adsorption and photocatalytic degradation | en_US |
dc.type | Article | en_US |
dc.identifier.email | Djurišić, AB: dalek@hku.hk | en_US |
dc.identifier.email | Chan, WK: waichan@hku.hk | en_US |
dc.identifier.authority | Djurišić, AB=rp00690 | en_US |
dc.identifier.authority | Chan, WK=rp00667 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1021/jp403478q | en_US |
dc.identifier.scopus | eid_2-s2.0-84879125615 | en_US |
dc.identifier.hkuros | 218994 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-84879125615&selection=ref&src=s&origin=recordpage | en_US |
dc.identifier.volume | 117 | en_US |
dc.identifier.issue | 23 | en_US |
dc.identifier.spage | 12218 | en_US |
dc.identifier.epage | 12228 | en_US |
dc.identifier.isi | WOS:000320640500038 | - |
dc.publisher.place | United States | en_US |
dc.identifier.scopusauthorid | Liu, F=55599086400 | en_US |
dc.identifier.scopusauthorid | Leung, YH=16042693500 | en_US |
dc.identifier.scopusauthorid | Djurišić, AB=7004904830 | en_US |
dc.identifier.scopusauthorid | Ng, AMC=12140078600 | en_US |
dc.identifier.scopusauthorid | Chan, WK=13310083000 | en_US |
dc.identifier.issnl | 1932-7447 | - |