Incorporation of alien atoms into TiO2 is an effective means to extend its light absorption edge for utilizing solar energy sufficiently. Herein, taking rutile and anatase as precursors, respectively, Rh element was attempted to dope into TiO2 by an immersion-calcination process. The results showed that Rh species were readily immerged in the crystal structure of rutile at a temperature above 973 K, while they were constantly positioned on the surface of anatase in a separate form of Rh2O3 nanoparticle even at 1173 K. Density functional theory simulations revealed that the Rh-rutile sample owned a higher negative formation energy than Rh-anatase. Under visible light irradiation and in the presence of ascorbic acid as a sacrificial reagent, photocatalytic hydrogen evolution activity over Rh-doped rutile was about 50 times of that over Rh-doped anatase powders. The present work demonstrates the roles of the crystal phase in atom doping that eventually dominates photocatalytic activities.
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22 November 2021
Research Article|
November 22 2021
Doping Rh into TiO2 as a visible-light-responsive photocatalyst: The difference between rutile and anatase
Special Collection:
Materials for Renewable Fuels Production
Jiaming Wang;
Jiaming Wang
1
School of Physical Science and Technology, ShanghaiTech University
, Shanghai 201210, People's Republic of China
2
Shanghai Institute of Applied Physics, Chinese Academy of Sciences
, Shanghai 201800, China
3
University of Chinese Academy of Sciences
, Beijing 100049, People's Republic of China
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Kaiwei Liu;
Kaiwei Liu
1
School of Physical Science and Technology, ShanghaiTech University
, Shanghai 201210, People's Republic of China
3
University of Chinese Academy of Sciences
, Beijing 100049, People's Republic of China
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Boyang Zhang;
Boyang Zhang
1
School of Physical Science and Technology, ShanghaiTech University
, Shanghai 201210, People's Republic of China
3
University of Chinese Academy of Sciences
, Beijing 100049, People's Republic of China
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Yaru Qiu;
Yaru Qiu
1
School of Physical Science and Technology, ShanghaiTech University
, Shanghai 201210, People's Republic of China
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Yao Xiang;
Yao Xiang
1
School of Physical Science and Technology, ShanghaiTech University
, Shanghai 201210, People's Republic of China
3
University of Chinese Academy of Sciences
, Beijing 100049, People's Republic of China
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Wenrui Lin;
Wenrui Lin
1
School of Physical Science and Technology, ShanghaiTech University
, Shanghai 201210, People's Republic of China
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Bo Yang;
Bo Yang
1
School of Physical Science and Technology, ShanghaiTech University
, Shanghai 201210, People's Republic of China
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Bin Li;
Bin Li
a)
1
School of Physical Science and Technology, ShanghaiTech University
, Shanghai 201210, People's Republic of China
2
Shanghai Institute of Applied Physics, Chinese Academy of Sciences
, Shanghai 201800, China
3
University of Chinese Academy of Sciences
, Beijing 100049, People's Republic of China
4
Shanghai Advanced Research Institute, Chinese Academy of Sciences
, Shanghai 201204, China
a)Authors to whom correspondence should be addressed: libin1995@sinap.ca.cn. Tel.: (+86) 21-2030-4824 and magj@shanghaitech.edu.cn. Tel.: (+86) 21-2068-5516
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Guijun Ma
Guijun Ma
a)
1
School of Physical Science and Technology, ShanghaiTech University
, Shanghai 201210, People's Republic of China
a)Authors to whom correspondence should be addressed: libin1995@sinap.ca.cn. Tel.: (+86) 21-2030-4824 and magj@shanghaitech.edu.cn. Tel.: (+86) 21-2068-5516
Search for other works by this author on:
a)Authors to whom correspondence should be addressed: libin1995@sinap.ca.cn. Tel.: (+86) 21-2030-4824 and magj@shanghaitech.edu.cn. Tel.: (+86) 21-2068-5516
Note: This paper is part of the APL Special Collection on Materials for Renewable Fuels Production.
Appl. Phys. Lett. 119, 213901 (2021)
Article history
Received:
September 07 2021
Accepted:
November 04 2021
Citation
Jiaming Wang, Kaiwei Liu, Boyang Zhang, Yaru Qiu, Yao Xiang, Wenrui Lin, Bo Yang, Bin Li, Guijun Ma; Doping Rh into TiO2 as a visible-light-responsive photocatalyst: The difference between rutile and anatase. Appl. Phys. Lett. 22 November 2021; 119 (21): 213901. https://doi.org/10.1063/5.0070523
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