Enhancing the photocatalytic activity of anatase TiO2 by improving the specific facet-induced spontaneous separation of photogenerated electrons and holes

Chang Liu; Xiguang Han; Shuifen Xie; Qin Kuang; Xue Wang; Mingshang Jin; Zhaoxiong Xie; Lansun Zheng

doi:10.1002/asia.201200886

Enhancing the photocatalytic activity of anatase TiO₂ by improving the specific facet-induced spontaneous separation of photogenerated electrons and holes

Chang Liu
, Xiguang Han
, Shuifen Xie
, Qin Kuang
, Xue Wang
, Mingshang Jin
, Zhaoxiong Xie
, Lansun Zheng

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

143 Citations (Scopus)

Abstract

Recently, it has been proven that directional flow of photogenerated charge carriers occurs on specific facets of TiO2 nanocrystals. Herein, we demonstrate that the photocatalytic activity of anatase TiO2 nanocrystals in both photoreduction and photooxidation processes can be enhanced by selectively depositing Pt nanoparticles on the {101} facets, which strengthens spontaneously surface-induced separation between photogenerated electrons and holes in the photocatalysis process. An optimal ratio of the oxidative {001} facets to the reductive {101} facets exists with regard to the photocatalysis of the faceted TiO2 nanocrystals, and this is crucial for balancing the recombination and redox reaction rates of photogenerated electrons and holes. The present work might help us gain deeper insight into the relation between the specific surface of semiconductor photocatalysts and their photocatalytic activities and provides us with a new route to design photocatalysts with high photocatalytic activity. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Original language	English
Pages (from-to)	282-289
Journal	Chemistry - An Asian Journal
Volume	8
Issue number	1
DOIs	https://doi.org/10.1002/asia.201200886
Publication status	Published - Jan 2013
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Research Keywords

hydrogen evolution
nanostructures
photocatalysis
surface chemistry
titanium

Access Output

10.1002/asia.201200886

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{844eb02453824585bc5f307de052ae90,

title = "Enhancing the photocatalytic activity of anatase TiO2 by improving the specific facet-induced spontaneous separation of photogenerated electrons and holes",

abstract = "Recently, it has been proven that directional flow of photogenerated charge carriers occurs on specific facets of TiO2 nanocrystals. Herein, we demonstrate that the photocatalytic activity of anatase TiO2 nanocrystals in both photoreduction and photooxidation processes can be enhanced by selectively depositing Pt nanoparticles on the \{101\} facets, which strengthens spontaneously surface-induced separation between photogenerated electrons and holes in the photocatalysis process. An optimal ratio of the oxidative \{001\} facets to the reductive \{101\} facets exists with regard to the photocatalysis of the faceted TiO2 nanocrystals, and this is crucial for balancing the recombination and redox reaction rates of photogenerated electrons and holes. The present work might help us gain deeper insight into the relation between the specific surface of semiconductor photocatalysts and their photocatalytic activities and provides us with a new route to design photocatalysts with high photocatalytic activity. Copyright {\textcopyright} 2013 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim.",

keywords = "hydrogen evolution, nanostructures, photocatalysis, surface chemistry, titanium",

author = "Chang Liu and Xiguang Han and Shuifen Xie and Qin Kuang and Xue Wang and Mingshang Jin and Zhaoxiong Xie and Lansun Zheng",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected]. ",

year = "2013",

month = jan,

doi = "10.1002/asia.201200886",

language = "English",

volume = "8",

pages = "282--289",

journal = "Chemistry - An Asian Journal",

issn = "1861-4728",

publisher = "John Wiley \& Sons",

number = "1",

}

Enhancing the photocatalytic activity of anatase TiO₂ by improving the specific facet-induced spontaneous separation of photogenerated electrons and holes. / Liu, Chang; Han, Xiguang; Xie, Shuifen et al.
In: Chemistry - An Asian Journal, Vol. 8, No. 1, 01.2013, p. 282-289.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Enhancing the photocatalytic activity of anatase TiO2 by improving the specific facet-induced spontaneous separation of photogenerated electrons and holes

AU - Liu, Chang

AU - Han, Xiguang

AU - Xie, Shuifen

AU - Kuang, Qin

AU - Wang, Xue

AU - Jin, Mingshang

AU - Xie, Zhaoxiong

AU - Zheng, Lansun

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2013/1

Y1 - 2013/1

N2 - Recently, it has been proven that directional flow of photogenerated charge carriers occurs on specific facets of TiO2 nanocrystals. Herein, we demonstrate that the photocatalytic activity of anatase TiO2 nanocrystals in both photoreduction and photooxidation processes can be enhanced by selectively depositing Pt nanoparticles on the {101} facets, which strengthens spontaneously surface-induced separation between photogenerated electrons and holes in the photocatalysis process. An optimal ratio of the oxidative {001} facets to the reductive {101} facets exists with regard to the photocatalysis of the faceted TiO2 nanocrystals, and this is crucial for balancing the recombination and redox reaction rates of photogenerated electrons and holes. The present work might help us gain deeper insight into the relation between the specific surface of semiconductor photocatalysts and their photocatalytic activities and provides us with a new route to design photocatalysts with high photocatalytic activity. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

AB - Recently, it has been proven that directional flow of photogenerated charge carriers occurs on specific facets of TiO2 nanocrystals. Herein, we demonstrate that the photocatalytic activity of anatase TiO2 nanocrystals in both photoreduction and photooxidation processes can be enhanced by selectively depositing Pt nanoparticles on the {101} facets, which strengthens spontaneously surface-induced separation between photogenerated electrons and holes in the photocatalysis process. An optimal ratio of the oxidative {001} facets to the reductive {101} facets exists with regard to the photocatalysis of the faceted TiO2 nanocrystals, and this is crucial for balancing the recombination and redox reaction rates of photogenerated electrons and holes. The present work might help us gain deeper insight into the relation between the specific surface of semiconductor photocatalysts and their photocatalytic activities and provides us with a new route to design photocatalysts with high photocatalytic activity. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

KW - hydrogen evolution

KW - nanostructures

KW - photocatalysis

KW - surface chemistry

KW - titanium

UR - https://www.scopus.com/pages/publications/84871549283

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84871549283&origin=recordpage

U2 - 10.1002/asia.201200886

DO - 10.1002/asia.201200886

M3 - RGC 21 - Publication in refereed journal

SN - 1861-4728

VL - 8

SP - 282

EP - 289

JO - Chemistry - An Asian Journal

JF - Chemistry - An Asian Journal

IS - 1

ER -