Black NiO-TiO2 nanorods for solar photocatalysis: Recognition of electronic structure and reaction mechanism
This work provides an engineering guide to construct active sites on TiO 2 nanorods (NRs) by coupling p-type black NiO nanoclusters (E g = 1.42 eV) with rich crystal defects and match-up band structure for excellent solar photocatalysis. Photo-oxidation of toluene was used as a model reaction to eva...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
Elsevier BV
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/59309 |
| _version_ | 1848760444521545728 |
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| author | Liu, J. Li, Y. Ke, J. Wang, Shaobin Wang, L. Xiao, H. |
| author_facet | Liu, J. Li, Y. Ke, J. Wang, Shaobin Wang, L. Xiao, H. |
| author_sort | Liu, J. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | This work provides an engineering guide to construct active sites on TiO 2 nanorods (NRs) by coupling p-type black NiO nanoclusters (E g = 1.42 eV) with rich crystal defects and match-up band structure for excellent solar photocatalysis. Photo-oxidation of toluene was used as a model reaction to evaluate the photocatalytic performance of black NiO/TiO 2 hybrids under simulated solar light irradiation from a 300 W Xe-lamp. The black NiO/TiO 2 hybrids Exhibit 80% of photodegradation conversion and 56% of mineralization efficiency, which are 7.9 and 4.5 times higher than those of TiO 2 NRs. Detailed characterizations reveal that highly dispersed NiO and p-n heterojunction effectively facilitate light-harvesting, separation and transfer of photo-generated charge carries, and significantly inhibit the recombination of electrons and holes. Furthermore, the realignment of band structure and the p-n heterojunctions in NiO/TiO 2 result in the production of [rad]O 2 - and h + with a longer lifetime, which could efficiently attack the aromatic ring of toluene. The efficient adsorption of toluene by H-bonding formation also facilitates the photo-oxidation of toluene on NiO/TiO 2 . |
| first_indexed | 2025-11-14T10:15:53Z |
| format | Journal Article |
| id | curtin-20.500.11937-59309 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:15:53Z |
| publishDate | 2018 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-593092018-03-26T03:07:48Z Black NiO-TiO2 nanorods for solar photocatalysis: Recognition of electronic structure and reaction mechanism Liu, J. Li, Y. Ke, J. Wang, Shaobin Wang, L. Xiao, H. This work provides an engineering guide to construct active sites on TiO 2 nanorods (NRs) by coupling p-type black NiO nanoclusters (E g = 1.42 eV) with rich crystal defects and match-up band structure for excellent solar photocatalysis. Photo-oxidation of toluene was used as a model reaction to evaluate the photocatalytic performance of black NiO/TiO 2 hybrids under simulated solar light irradiation from a 300 W Xe-lamp. The black NiO/TiO 2 hybrids Exhibit 80% of photodegradation conversion and 56% of mineralization efficiency, which are 7.9 and 4.5 times higher than those of TiO 2 NRs. Detailed characterizations reveal that highly dispersed NiO and p-n heterojunction effectively facilitate light-harvesting, separation and transfer of photo-generated charge carries, and significantly inhibit the recombination of electrons and holes. Furthermore, the realignment of band structure and the p-n heterojunctions in NiO/TiO 2 result in the production of [rad]O 2 - and h + with a longer lifetime, which could efficiently attack the aromatic ring of toluene. The efficient adsorption of toluene by H-bonding formation also facilitates the photo-oxidation of toluene on NiO/TiO 2 . 2018 Journal Article http://hdl.handle.net/20.500.11937/59309 10.1016/j.apcatb.2017.11.028 Elsevier BV restricted |
| spellingShingle | Liu, J. Li, Y. Ke, J. Wang, Shaobin Wang, L. Xiao, H. Black NiO-TiO2 nanorods for solar photocatalysis: Recognition of electronic structure and reaction mechanism |
| title | Black NiO-TiO2 nanorods for solar photocatalysis: Recognition of electronic structure and reaction mechanism |
| title_full | Black NiO-TiO2 nanorods for solar photocatalysis: Recognition of electronic structure and reaction mechanism |
| title_fullStr | Black NiO-TiO2 nanorods for solar photocatalysis: Recognition of electronic structure and reaction mechanism |
| title_full_unstemmed | Black NiO-TiO2 nanorods for solar photocatalysis: Recognition of electronic structure and reaction mechanism |
| title_short | Black NiO-TiO2 nanorods for solar photocatalysis: Recognition of electronic structure and reaction mechanism |
| title_sort | black nio-tio2 nanorods for solar photocatalysis: recognition of electronic structure and reaction mechanism |
| url | http://hdl.handle.net/20.500.11937/59309 |