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https://hdl.handle.net/2440/114830
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Type: | Journal article |
Title: | Black NiO-TiO₂ nanorods for solar photocatalysis: recognition of electronic structure and reaction mechanism |
Author: | Liu, J. Li, Y. Ke, J. Wang, S. Wang, L. Xiao, H. |
Citation: | Applied Catalysis B: Environmental, 2018; 224:705-714 |
Publisher: | Elsevier |
Issue Date: | 2018 |
ISSN: | 0926-3373 1873-3883 |
Statement of Responsibility: | Jie Liu, Ying Li, Jun Ke, Shaobin Wang, Lidong Wang, Huining Xiao |
Abstract: | This work provides an engineering guide to construct active sites on TiO2 nanorods (NRs) by coupling p-type black NiO nanoclusters (Eg = 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/TiO2 hybrids under simulated solar light irradiation from a 300 W Xe-lamp. The black NiO/TiO2 hybrids Exhibit 80% of photodegradation conversion and 56% of mineralization efficiency, which are 7.9 and 4.5 times higher than those of TiO2 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/TiO2 result in the production of O2− 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/TiO2. |
Keywords: | Photocatalysis; Black NiO nanoclusters; TiO₂ nanorods; p-n heterojunctions; toluene degradation |
Rights: | © 2017 Elsevier B.V. All rights reserved. |
DOI: | 10.1016/j.apcatb.2017.11.028 |
Grant ID: | 21507029 21501138 |
Published version: | http://dx.doi.org/10.1016/j.apcatb.2017.11.028 |
Appears in Collections: | Aurora harvest 8 Chemical Engineering publications |
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