Photoinduced hydrophilicity of TiO
 2
 film as the effect of H
 2
 O
 2
 addition

Tseng, Yao-Hsuan; Kuo, C. S.; Huang, Chien Hao; Hirakawa, Tsutomu; Negishi, Nobuaki; Bai, Hsun-Ling

doi:10.1049/mnl.2010.0003

Cited by 5 publications

(3 citation statements)

References 7 publications

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“…To complete the photocatalytic cycle, O v and excess electrons should be restored after the reaction. Fujishima et al and Tseng et al have proposed that O v can be generated under UV illumination during the generation of O 2 : In a recent theoretical study, Selloni et al . has showed that H 2 O is oxidized to O 2 by the hole to generate O v : It is clear that O v can be regenerated in the oxidation part of the overall artificial photosynthesis reaction, and the excess electrons of TiO 2 will be restored by photogenereated electrons.…”

Section: Resultsmentioning

confidence: 99%

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New Mechanism for Photocatalytic Reduction of CO₂ on the Anatase TiO₂(101) Surface: The Essential Role of Oxygen Vacancy

2016

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Photocatalytic reduction of CO into organic molecules is a very complicated and important reaction. Two possible pathways, the fast-hydrogenation (FH) path and the fast-deoxygenation (FdO) path, have been proposed on the most popular photocatalyst TiO. We have carried out first-principles calculations to investigate both pathways on the perfect and defective anatase TiO(101) surfaces to provide comprehensive understanding of the reaction mechanism. For the FH path, it is found that oxygen vacancy on defective surface can greatly lower the barrier of the deoxygenation processes, which makes it a more active site than the surface Ti. For the FdO path, our calculation suggests that it can not proceed on the perfect surface, nor can it proceed on the defective surface due to their unfavorable energetics. Based on the fact that the FH path can proceed both at the surface Ti site and the oxygen vacancy site, we have proposed a simple mechanism that is compatible with various experiments. It can properly rationalize the selectivity of the reaction and greatly simplify the picture of the reaction. The important role played by oxygen vacancy in the new mechanism is highlighted and a strategy for design of more efficient photocatalysts is proposed accordingly.

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Section: Resultsmentioning

confidence: 99%

“…To complete the photocatalytic cycle, O v and excess electrons should be restored after the reaction. Fujishima et al 48 and Tseng et al 49 have proposed that O v can be generated under UV illumination during the generation of O 2 :…”

Section: − (Step M-ii) Once the Chmentioning

confidence: 99%

New Mechanism for Photocatalytic Reduction of CO₂ on the Anatase TiO₂(101) Surface: The Essential Role of Oxygen Vacancy

2016

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“…The change in the surface properties of TiO 2 under light illumination was previously observed and investigated in literature [23][24][25][26][27][28]. This phenomenon attracted much attention; however the understanding of it is still under debate.…”

Section: Reactor Characterizationmentioning

confidence: 88%

Porous Photocatalytic Membrane Microreactor (P2M2): A new reactor concept for photochemistry

Aran

Salamon

Rijnaarts

et al. 2011

Journal of Photochemistry and Photobiology A: Chemistry

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Influence of La3+ and Fe3+ co-doping to nano-TiO2 prepared by graded calcination

Yang

Zheng

2012

Journal of Alloys and Compounds

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Photoinduced hydrophilicity of TiO ₂ film as the effect of H ₂ O ₂ addition

Cited by 5 publications

References 7 publications

New Mechanism for Photocatalytic Reduction of CO₂ on the Anatase TiO₂(101) Surface: The Essential Role of Oxygen Vacancy

New Mechanism for Photocatalytic Reduction of CO₂ on the Anatase TiO₂(101) Surface: The Essential Role of Oxygen Vacancy

Porous Photocatalytic Membrane Microreactor (P2M2): A new reactor concept for photochemistry

Influence of La3+ and Fe3+ co-doping to nano-TiO2 prepared by graded calcination

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Photoinduced hydrophilicity of TiO 2 film as the effect of H 2 O 2 addition

Cited by 5 publications

References 7 publications

New Mechanism for Photocatalytic Reduction of CO2 on the Anatase TiO2(101) Surface: The Essential Role of Oxygen Vacancy

New Mechanism for Photocatalytic Reduction of CO2 on the Anatase TiO2(101) Surface: The Essential Role of Oxygen Vacancy

Porous Photocatalytic Membrane Microreactor (P2M2): A new reactor concept for photochemistry

Influence of La3+ and Fe3+ co-doping to nano-TiO2 prepared by graded calcination

Contact Info

Product

Resources

About

Photoinduced hydrophilicity of TiO ₂ film as the effect of H ₂ O ₂ addition

New Mechanism for Photocatalytic Reduction of CO₂ on the Anatase TiO₂(101) Surface: The Essential Role of Oxygen Vacancy

New Mechanism for Photocatalytic Reduction of CO₂ on the Anatase TiO₂(101) Surface: The Essential Role of Oxygen Vacancy