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Synergy of palladium species and hydrogenation for enhanced photocatalytic activity of {001} facets dominant TiO2 nanosheets

Published online by Cambridge University Press:  29 June 2017

Zhipeng Lyu ,
Bing Liu ,
Ran Wang  and
Lihong Tian
Zhipeng Lyu
Affiliation:
School of Mechanical Engineering, Yangtze University, Jingzhou 434023, Hubei, China; and Hubei Collaborative Innovation Center for Advanced Organochemical Materials and Ministry of Education Key Laboratory for the Synthesis and Applications of Organic Functional Molecules, Hubei University, Wuhan 430062, China
Bing Liu
Affiliation:
Hubei Collaborative Innovation Center for Advanced Organochemical Materials and Ministry of Education Key Laboratory for the Synthesis and Applications of Organic Functional Molecules, Hubei University, Wuhan 430062, China
Ran Wang
Affiliation:
Hubei Collaborative Innovation Center for Advanced Organochemical Materials and Ministry of Education Key Laboratory for the Synthesis and Applications of Organic Functional Molecules, Hubei University, Wuhan 430062, China
Lihong Tian*
Affiliation:
Hubei Collaborative Innovation Center for Advanced Organochemical Materials and Ministry of Education Key Laboratory for the Synthesis and Applications of Organic Functional Molecules, Hubei University, Wuhan 430062, China
*
a)Address all correspondence to this author. e-mail: tian7978@hubu.edu.cn
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Abstract

{001} facets dominant TiO2 nanosheets have attracted intensive attention in the photocatalytic field, due to their undercoordinated Ti5c centers, higher surface energy, and photocatalytic activity than those of any other low-energy facet. However, a fluorine-rich (001) surface is controversial to the photocatalytic activity of TiO2 nanocrystals. We have removed the surface F atoms bonding with Ti by hydrogenation method successfully, and found that {001} facets dominant TiO2 nanosheets without the terminated F atoms showed dramatic enhancement in the photocatalytic activity. Moreover, the clean (001) surface was more in favor of the deposition of PdO than the fluorine-rich surface, and the amorphous structure from the hydrogenation is beneficial to the reduction of PdCl42− to Pd nanoparticles. The PdO attached on {001} facets and the amorphous structure promoted the separation of charge carriers, and Pd nanoparticles transferred plasmonic-induced electrons to the conduction band of hydrogenated TiO2 under simulated solar irradiation. Thus, a significantly enhanced photocatalytic activity of Pd–H–TiO2 is achieved on degrading organic environmental pollution, due to the synergy of palladium species and hydrogenation on {001} facets exposed TiO2.

Keywords

{001} facets dominant TiO2palladium speciesphotocatalytichydrogenation
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 14 , 28 July 2017 , pp. 2781 - 2789
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Copyright
Copyright © Materials Research Society 2017 

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Footnotes

b)

These authors contributed equally to this work.

Contributing Editor: Xiaobo Chen

References

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