Unusual reactivity of visible-light-responsive AgBr-BiOBr heterojunction photocatalysts
AgBr-BiOBr heterojunction photocatalysts with varying loadings of AgBr (<5.0 wt% AgBr) were synthesized through an effective co-precipitation method and used for the photodegradation of Rhodamine B under visible-light irradiation. Superior photocatalytic activities relative to that of pure Bi...
| Main Authors: | , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
2012
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| _version_ | 1797103983806906368 |
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| author | Kong, L Jiang, Z Lai, H Nicholls, R Xiao, T Jones, M Edwards, P |
| author_facet | Kong, L Jiang, Z Lai, H Nicholls, R Xiao, T Jones, M Edwards, P |
| author_sort | Kong, L |
| collection | OXFORD |
| description | AgBr-BiOBr heterojunction photocatalysts with varying loadings of AgBr (<5.0 wt% AgBr) were synthesized through an effective co-precipitation method and used for the photodegradation of Rhodamine B under visible-light irradiation. Superior photocatalytic activities relative to that of pure BiOBr were observed on the AgBr-BiOBr catalysts with low AgBr loading (up to 0.5 wt%). Higher AgBr loadings (>0.5 wt%) lead to isolated AgBr species and reduced photocatalytic activity. Among such catalysts, the AgBr (0.2 wt%)-BiOBr exhibits the highest visible-light-responsive photoactivity, which can decolorize Rhodamine B within 30 min. However, these AgBr-BiOBr materials gradually lost their photoactivity in the cycling photocatalytic tests. Possible mechanisms for both the enhanced photocatalytic activity and deactivation of the AgBr-BiOBr heterojunctions were proposed on basis of theoretical speculation and experimental observations. © 2012 Elsevier Inc. All rights reserved. |
| first_indexed | 2024-03-07T06:27:49Z |
| format | Journal article |
| id | oxford-uuid:f4ec3296-6259-49b3-9532-b85aea32f0c7 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T06:27:49Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:f4ec3296-6259-49b3-9532-b85aea32f0c72022-03-27T12:23:26ZUnusual reactivity of visible-light-responsive AgBr-BiOBr heterojunction photocatalystsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f4ec3296-6259-49b3-9532-b85aea32f0c7EnglishSymplectic Elements at Oxford2012Kong, LJiang, ZLai, HNicholls, RXiao, TJones, MEdwards, PAgBr-BiOBr heterojunction photocatalysts with varying loadings of AgBr (<5.0 wt% AgBr) were synthesized through an effective co-precipitation method and used for the photodegradation of Rhodamine B under visible-light irradiation. Superior photocatalytic activities relative to that of pure BiOBr were observed on the AgBr-BiOBr catalysts with low AgBr loading (up to 0.5 wt%). Higher AgBr loadings (>0.5 wt%) lead to isolated AgBr species and reduced photocatalytic activity. Among such catalysts, the AgBr (0.2 wt%)-BiOBr exhibits the highest visible-light-responsive photoactivity, which can decolorize Rhodamine B within 30 min. However, these AgBr-BiOBr materials gradually lost their photoactivity in the cycling photocatalytic tests. Possible mechanisms for both the enhanced photocatalytic activity and deactivation of the AgBr-BiOBr heterojunctions were proposed on basis of theoretical speculation and experimental observations. © 2012 Elsevier Inc. All rights reserved. |
| spellingShingle | Kong, L Jiang, Z Lai, H Nicholls, R Xiao, T Jones, M Edwards, P Unusual reactivity of visible-light-responsive AgBr-BiOBr heterojunction photocatalysts |
| title | Unusual reactivity of visible-light-responsive AgBr-BiOBr heterojunction photocatalysts |
| title_full | Unusual reactivity of visible-light-responsive AgBr-BiOBr heterojunction photocatalysts |
| title_fullStr | Unusual reactivity of visible-light-responsive AgBr-BiOBr heterojunction photocatalysts |
| title_full_unstemmed | Unusual reactivity of visible-light-responsive AgBr-BiOBr heterojunction photocatalysts |
| title_short | Unusual reactivity of visible-light-responsive AgBr-BiOBr heterojunction photocatalysts |
| title_sort | unusual reactivity of visible light responsive agbr biobr heterojunction photocatalysts |
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