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Visible light activated mesoporous TiO2-xNx nanocrystalline photocatalyst

Visible light activated mesoporous TiO2-xNx nanocrystalline photocatalyst
Visible light activated mesoporous TiO2-xNx nanocrystalline photocatalyst
Mesoporous TiO2-xNx has been prepared using template-free solvothermal synthesis with post-ammonolysis at 500°C. The characterizations using X-ray diffraction (XRD), Raman, X-ray photoelectron spectroscopy (XPS), N2 ad-desorption, and transmission electron microscopy (TEM) showed that the TiO2-xNx is typical mesopores anatase nanocrystalline. The nitrogen dopant causes the absorption edge of TiO2 shift to a lower energy region that enhances its visible light absorption. Under visible light irradiation, the TiO2-xNx exhibits higher activity than commercial P25 but similar activity in decoloration of methylene blue under UV irradiation. There have been great interests in porous titania for its potential application in photocatalysis, sensor, and photovoltaics. Different synthesis strategies to produce mesoporous titania has been developed using a variety of surfactant templates. The combination of the template-free solvothermal synthesis of TiO2-ST and post-ammonolysized TiO2-xNx-ST is an effective method for preparing mesoporous N-doped TiO2. The mesopores of TiO2-xNx-ST result from the aggregation of their nano-crystalline particles. The crystal anatase phase of TiO2-xNx-ST is an important feature for photocatalysis. The TiO2-xNx-ST can adsorb the visible light up to 550 nm, therefore, exhibits higher visible light activity.
0167-2991
165
355-359
Elsevier
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Al-Shahrani, Farhan
7e21c2c3-17e2-49a3-bb9f-7ffa66c8cd6b
Lin, Tsung-Wu
70ca4259-c6e8-48b2-9b69-9f75876c17ae
Cui, Yingying
c991a528-ec29-4e6f-b56c-2e19f139f8e5
Xiao, Tiancun
90161b4f-4483-4b4f-8db6-6614b001ac54
Zhao, Dongyuan
Qiu, Shilun
Yang, Yi
Yu, Chengzhong
Jiang, Zheng
bcf19e78-f5c3-48e6-802b-fe77bd12deab
Al-Shahrani, Farhan
7e21c2c3-17e2-49a3-bb9f-7ffa66c8cd6b
Lin, Tsung-Wu
70ca4259-c6e8-48b2-9b69-9f75876c17ae
Cui, Yingying
c991a528-ec29-4e6f-b56c-2e19f139f8e5
Xiao, Tiancun
90161b4f-4483-4b4f-8db6-6614b001ac54
Zhao, Dongyuan
Qiu, Shilun
Yang, Yi
Yu, Chengzhong

Jiang, Zheng, Al-Shahrani, Farhan, Lin, Tsung-Wu, Cui, Yingying and Xiao, Tiancun (2007) Visible light activated mesoporous TiO2-xNx nanocrystalline photocatalyst. Zhao, Dongyuan, Qiu, Shilun, Yang, Yi and Yu, Chengzhong (eds.) In Recent Progress in Mesostructured Materials. Studies in Surface Science and Catalysis: Proceedings of the 5th International Mesostructured Materials Symposium (IMMS2006). Elsevier. pp. 355-359 . (doi:10.1016/S0167-2991(07)80334-X).

Record type: Conference or Workshop Item (Paper)

Abstract

Mesoporous TiO2-xNx has been prepared using template-free solvothermal synthesis with post-ammonolysis at 500°C. The characterizations using X-ray diffraction (XRD), Raman, X-ray photoelectron spectroscopy (XPS), N2 ad-desorption, and transmission electron microscopy (TEM) showed that the TiO2-xNx is typical mesopores anatase nanocrystalline. The nitrogen dopant causes the absorption edge of TiO2 shift to a lower energy region that enhances its visible light absorption. Under visible light irradiation, the TiO2-xNx exhibits higher activity than commercial P25 but similar activity in decoloration of methylene blue under UV irradiation. There have been great interests in porous titania for its potential application in photocatalysis, sensor, and photovoltaics. Different synthesis strategies to produce mesoporous titania has been developed using a variety of surfactant templates. The combination of the template-free solvothermal synthesis of TiO2-ST and post-ammonolysized TiO2-xNx-ST is an effective method for preparing mesoporous N-doped TiO2. The mesopores of TiO2-xNx-ST result from the aggregation of their nano-crystalline particles. The crystal anatase phase of TiO2-xNx-ST is an important feature for photocatalysis. The TiO2-xNx-ST can adsorb the visible light up to 550 nm, therefore, exhibits higher visible light activity.

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More information

Published date: 2007
Venue - Dates: conference; 2007-01-01, 2007-01-01
Organisations: Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 352780
URI: http://eprints.soton.ac.uk/id/eprint/352780
ISSN: 0167-2991
PURE UUID: 08574e20-9e30-458e-b8f2-872a5f2350d8
ORCID for Zheng Jiang: ORCID iD orcid.org/0000-0002-7972-6175

Catalogue record

Date deposited: 18 Jun 2013 11:03
Last modified: 20 Jul 2019 00:38

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Contributors

Author: Zheng Jiang ORCID iD
Author: Farhan Al-Shahrani
Author: Tsung-Wu Lin
Author: Yingying Cui
Author: Tiancun Xiao
Editor: Dongyuan Zhao
Editor: Shilun Qiu
Editor: Yi Yang
Editor: Chengzhong Yu

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