A hierarchically assembled mesoporous ZnO hemisphere array and hollow microspheres for photocatalytic membrane water filtration
A mesoporous ZnO hemisphere array has been prepared via a topotactic transition of Zn4(OH)6CO3·H2O (ZCHH) by chemical bath deposition. Each hemisphere is comprised of a radially oriented nanoflake shell grown on the hemispherical interior. Reaction time-dependent SEM analysis shows that the morpholo...
| Main Authors: | , , , , , |
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| Outros autores: | |
| Formato: | Journal Article |
| Idioma: | English |
| Publicado: |
2013
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| Acceso en liña: | https://hdl.handle.net/10356/100991 http://hdl.handle.net/10220/11054 |
| _version_ | 1826122858911236096 |
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| author | Pan, Jia Hong Zhang, Xiwang Du, Alan J. Bai, Hongwei Ng, Jiawei Sun, Darren Delai |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Pan, Jia Hong Zhang, Xiwang Du, Alan J. Bai, Hongwei Ng, Jiawei Sun, Darren Delai |
| author_sort | Pan, Jia Hong |
| collection | NTU |
| description | A mesoporous ZnO hemisphere array has been prepared via a topotactic transition of Zn4(OH)6CO3·H2O (ZCHH) by chemical bath deposition. Each hemisphere is comprised of a radially oriented nanoflake shell grown on the hemispherical interior. Reaction time-dependent SEM analysis shows that the morphological formation of ZCHH involves a deposition–growth–secondary growth–redeposition procedure. Upon calcination, ZCHH readily decomposes to nanocrystalline wurtzite-phase ZnO without significant change in morphology, and the release of CO2 and H2O from ZCHH creates an additional mesoporous structure in both hemispherical interior and nanoflake shell. A similar process but without using a substrate has been developed for synthesis of mesoporous ZnO hollow microspheres in powder form. Both the elaborated superstructured photocatalysts consisting of mesoporous nanoflakes have been demonstrated to exhibit excellent performances in the photocatalytic membrane filtration. |
| first_indexed | 2024-10-01T05:55:07Z |
| format | Journal Article |
| id | ntu-10356/100991 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:55:07Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/1009912020-03-07T11:45:54Z A hierarchically assembled mesoporous ZnO hemisphere array and hollow microspheres for photocatalytic membrane water filtration Pan, Jia Hong Zhang, Xiwang Du, Alan J. Bai, Hongwei Ng, Jiawei Sun, Darren Delai School of Civil and Environmental Engineering A mesoporous ZnO hemisphere array has been prepared via a topotactic transition of Zn4(OH)6CO3·H2O (ZCHH) by chemical bath deposition. Each hemisphere is comprised of a radially oriented nanoflake shell grown on the hemispherical interior. Reaction time-dependent SEM analysis shows that the morphological formation of ZCHH involves a deposition–growth–secondary growth–redeposition procedure. Upon calcination, ZCHH readily decomposes to nanocrystalline wurtzite-phase ZnO without significant change in morphology, and the release of CO2 and H2O from ZCHH creates an additional mesoporous structure in both hemispherical interior and nanoflake shell. A similar process but without using a substrate has been developed for synthesis of mesoporous ZnO hollow microspheres in powder form. Both the elaborated superstructured photocatalysts consisting of mesoporous nanoflakes have been demonstrated to exhibit excellent performances in the photocatalytic membrane filtration. 2013-07-09T04:10:58Z 2019-12-06T20:31:48Z 2013-07-09T04:10:58Z 2019-12-06T20:31:48Z 2012 2012 Journal Article https://hdl.handle.net/10356/100991 http://hdl.handle.net/10220/11054 10.1039/C2CP40997F en Physical chemistry chemical physics © 2012 The Owner Societies. |
| spellingShingle | Pan, Jia Hong Zhang, Xiwang Du, Alan J. Bai, Hongwei Ng, Jiawei Sun, Darren Delai A hierarchically assembled mesoporous ZnO hemisphere array and hollow microspheres for photocatalytic membrane water filtration |
| title | A hierarchically assembled mesoporous ZnO hemisphere array and hollow microspheres for photocatalytic membrane water filtration |
| title_full | A hierarchically assembled mesoporous ZnO hemisphere array and hollow microspheres for photocatalytic membrane water filtration |
| title_fullStr | A hierarchically assembled mesoporous ZnO hemisphere array and hollow microspheres for photocatalytic membrane water filtration |
| title_full_unstemmed | A hierarchically assembled mesoporous ZnO hemisphere array and hollow microspheres for photocatalytic membrane water filtration |
| title_short | A hierarchically assembled mesoporous ZnO hemisphere array and hollow microspheres for photocatalytic membrane water filtration |
| title_sort | hierarchically assembled mesoporous zno hemisphere array and hollow microspheres for photocatalytic membrane water filtration |
| url | https://hdl.handle.net/10356/100991 http://hdl.handle.net/10220/11054 |
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