Photocatalytic Activity Enhancement of Anatase TiO2 by Using TiO
We employed high-energy ball-milling technique to fabricate TiO/TiO2 heterogeneous nanostructures. XRD proved the existence of TiO/TiO2 heterogeneous structures. SEM and HRTEM investigation evidenced that the mean particle size and mean grain size of the as-prepared samples are 23 nm and 13 nm, resp...
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Series: | Journal of Nanomaterials |
Online Access: | http://dx.doi.org/10.1155/2014/298619 |
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doaj-a2a72edf5b5e43b38db95aecc027b36f2020-11-24T22:40:53ZengHindawi LimitedJournal of Nanomaterials1687-41101687-41292014-01-01201410.1155/2014/298619298619Photocatalytic Activity Enhancement of Anatase TiO2 by Using TiOZhenrui Chen0Wei Zhong1Zhutian Liang2Weiqian Li3Guannan He4Yinzhen Wang5Wei Li6Yuandong Xie7Qinyu He8Laboratory of Quantum Engineering and Quantum Materials, Advanced Material Laboratory, School of Physics Department and Telecommunication Engineering, South China Normal University, Guangzhou 510006, ChinaLaboratory of Quantum Engineering and Quantum Materials, Advanced Material Laboratory, School of Physics Department and Telecommunication Engineering, South China Normal University, Guangzhou 510006, ChinaLaboratory of Quantum Engineering and Quantum Materials, Advanced Material Laboratory, School of Physics Department and Telecommunication Engineering, South China Normal University, Guangzhou 510006, ChinaLaboratory of Quantum Engineering and Quantum Materials, Advanced Material Laboratory, School of Physics Department and Telecommunication Engineering, South China Normal University, Guangzhou 510006, ChinaLaboratory of Quantum Engineering and Quantum Materials, Advanced Material Laboratory, School of Physics Department and Telecommunication Engineering, South China Normal University, Guangzhou 510006, ChinaLaboratory of Quantum Engineering and Quantum Materials, Advanced Material Laboratory, School of Physics Department and Telecommunication Engineering, South China Normal University, Guangzhou 510006, ChinaLaboratory of Quantum Engineering and Quantum Materials, Advanced Material Laboratory, School of Physics Department and Telecommunication Engineering, South China Normal University, Guangzhou 510006, ChinaLaboratory of Quantum Engineering and Quantum Materials, Advanced Material Laboratory, School of Physics Department and Telecommunication Engineering, South China Normal University, Guangzhou 510006, ChinaLaboratory of Quantum Engineering and Quantum Materials, Advanced Material Laboratory, School of Physics Department and Telecommunication Engineering, South China Normal University, Guangzhou 510006, ChinaWe employed high-energy ball-milling technique to fabricate TiO/TiO2 heterogeneous nanostructures. XRD proved the existence of TiO/TiO2 heterogeneous structures. SEM and HRTEM investigation evidenced that the mean particle size and mean grain size of the as-prepared samples are 23 nm and 13 nm, respectively. UV-Vis spectra exhibited that TiO has enhanced the visible light absorption of TiO2 and has changed the Eg of TiO2. UPS examination indicated that the electron work function (EWF) of TiO is higher than that of TiO2. Photocatalytic degradation experiments revealed that an appropriate TiO content can enhance the photocatalytic activity of pure anatase TiO2. The best photocatalytic activity of TiO/TiO2 heterogeneous nanostructures is even better than that of Au-deposited TiO2 by keeping high degradation efficiency of 93%. The internal electrical field producing in TiO/TiO2 heterogeneous nanostructures was considered to be dominantly responsible for the enhanced photocatalytic activity. Therefore, the substitution of TiO with noble metal in TiO2 will be widely used in the future due to its low cost. This study also provides a clear direction of enhancing photocatalytic activity of TiO2: incorporating a guest compound into TiO2 with an appropriate content if the compound has much higher electron work function than that of TiO2.http://dx.doi.org/10.1155/2014/298619 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zhenrui Chen Wei Zhong Zhutian Liang Weiqian Li Guannan He Yinzhen Wang Wei Li Yuandong Xie Qinyu He |
spellingShingle |
Zhenrui Chen Wei Zhong Zhutian Liang Weiqian Li Guannan He Yinzhen Wang Wei Li Yuandong Xie Qinyu He Photocatalytic Activity Enhancement of Anatase TiO2 by Using TiO Journal of Nanomaterials |
author_facet |
Zhenrui Chen Wei Zhong Zhutian Liang Weiqian Li Guannan He Yinzhen Wang Wei Li Yuandong Xie Qinyu He |
author_sort |
Zhenrui Chen |
title |
Photocatalytic Activity Enhancement of Anatase TiO2 by Using TiO |
title_short |
Photocatalytic Activity Enhancement of Anatase TiO2 by Using TiO |
title_full |
Photocatalytic Activity Enhancement of Anatase TiO2 by Using TiO |
title_fullStr |
Photocatalytic Activity Enhancement of Anatase TiO2 by Using TiO |
title_full_unstemmed |
Photocatalytic Activity Enhancement of Anatase TiO2 by Using TiO |
title_sort |
photocatalytic activity enhancement of anatase tio2 by using tio |
publisher |
Hindawi Limited |
series |
Journal of Nanomaterials |
issn |
1687-4110 1687-4129 |
publishDate |
2014-01-01 |
description |
We employed high-energy ball-milling technique to fabricate TiO/TiO2 heterogeneous nanostructures. XRD proved the existence of TiO/TiO2 heterogeneous structures. SEM and HRTEM investigation evidenced that the mean particle size and mean grain size of the as-prepared samples are 23 nm and 13 nm, respectively. UV-Vis spectra exhibited that TiO has enhanced the visible light absorption of TiO2 and has changed the Eg of TiO2. UPS examination indicated that the electron work function (EWF) of TiO is higher than that of TiO2. Photocatalytic degradation experiments revealed that an appropriate TiO content can enhance the photocatalytic activity of pure anatase TiO2. The best photocatalytic activity of TiO/TiO2 heterogeneous nanostructures is even better than that of Au-deposited TiO2 by keeping high degradation efficiency of 93%. The internal electrical field producing in TiO/TiO2 heterogeneous nanostructures was considered to be dominantly responsible for the enhanced photocatalytic activity. Therefore, the substitution of TiO with noble metal in TiO2 will be widely used in the future due to its low cost. This study also provides a clear direction of enhancing photocatalytic activity of TiO2: incorporating a guest compound into TiO2 with an appropriate content if the compound has much higher electron work function than that of TiO2. |
url |
http://dx.doi.org/10.1155/2014/298619 |
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