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Substitutional carbon‐modified anatase TiO2 decahedral plates directly derived from titanium oxalate crystals via topotactic transition

Research output: Contribution to journalArticlepeer-review

Author(s)

Ping Niu, Tingting Wu, Lei Wen, Jun Tan, Yongqiang Yang, Shijian Zheng, Yan Liang, Feng Li, John T. S. Irvine, Gang Liu, Xiuliang Ma, Hui-ming Cheng

School/Research organisations

Abstract

Changing the composition and/or structure of some metal oxides at the atomic level can significantly improve their performance in different applications. Although many strategies have been developed, the introduction of heteroatoms, particularly anions to the internal part of metal oxide particles, is still not adequate. Here, an effective strategy is demonstrated for directly preparing polycrystalline decahedral plates of substitutional carbon‐doped anatase TiO2 from titanium (IV) oxalate by a thermally induced topotactic transition in an inert atmosphere. Because of the carbon concentration gradient introduced in side of the plates, the carbon‐doped TiO2 (TiO2–xCx) shows an increased visible light absorption and a two orders of magnitude higher electrical conductivity than pure TiO2. Consequently, it can be used as a photocatalyst and an active material for lithium storage and shows much superior activity in generating hydroxyl radicals under visible light and greatly increased electrical‐specific capacity at high charge–discharge rates. The strategy developed could also be applicable to the atomic‐scale modification of other metal oxides.
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Details

Original languageEnglish
Article number1705999
JournalAdvanced Materials
Volume30
Issue number20
Early online date30 Mar 2018
DOIs
Publication statusPublished - 17 May 2018

    Research areas

  • Carbon, Lithium, Photocatalysis, TiO2, Topotactic transition

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