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Homogeneous doping of substitutional nitrogen/carbon in TiO2 plates for visible light photocatalytic water oxidation

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Date
21/06/2019
Author
Wu, Tingting
Niu, Ping
Yang, Yongqiang
Yin, Li-Chang
Tan, Jun
Zhu, Huaze
Irvine, John T. S.
Wang, Lianzhou
Liu, Gang
Cheng, Hui-Ming
Funder
The Royal Society
Grant ID
NA140077
Keywords
Homogeneous doping
Photocatalyst
Topotactic transition
Visible light
Water splitting
QD Chemistry
NDAS
SDG 7 - Affordable and Clean Energy
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Abstract
Extending the light absorption range of wide‐bandgap photocatalysts into the visible light region is significant in terms of fully harvesting and converting solar light. The desirable band‐to‐band redshift of the absorption edge of semiconducting binary metal oxides such as prototypical photocatalyst TiO2 by doping is long targeted but remains a challenge, up to date. Here, by taking the advantage of abundant 1D diffusion channels with rhombus‐like cross‐sections along the c‐axis in the crystal structure of titanium oxalate hydrate to promote the entrance of nitrogen dopant species into the bulk and subsequent thermal topotactic transition in an atmosphere of gaseous ammonia, homogeneous doping of substitutional carbon/nitrogen for oxygen in the TiO2 decahedral plates with a dominant anatase phase is obtained for the first time. The resultant TiO2−x(CN)y with an unusual band‐to‐band visible light absorption spectrum can induce photocatalytic water oxidation to release oxygen under visible light irradiation. This study provides not only a promising visible light–responsive TiO2 photocatalyst, but also an important strategy for developing other solar‐driven photocatalysts.
Citation
Wu , T , Niu , P , Yang , Y , Yin , L-C , Tan , J , Zhu , H , Irvine , J T S , Wang , L , Liu , G & Cheng , H-M 2019 , ' Homogeneous doping of substitutional nitrogen/carbon in TiO 2 plates for visible light photocatalytic water oxidation ' , Advanced Functional Materials , vol. 29 , no. 25 , 1901943 . https://doi.org/10.1002/adfm.201901943
Publication
Advanced Functional Materials
Status
Peer reviewed
DOI
https://doi.org/10.1002/adfm.201901943
ISSN
1616-301X
Type
Journal article
Rights
Copyright © 2019 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1002/adfm.201901943
Description
The authors thank National Natural Science Foundation of China (Grant Nos. 51825204, 51572266, 21633009, and 51629201), the Key Research Program of Frontier Sciences CAS (QYZDB‐SSW‐JSC039) for the financial support. G.L. is grateful for the award of the Newton Advanced Fellowship.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/19803

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