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Substitutional Carbon‐Modified Anatase TiO 2 Decahedral Plates Directly Derived from Titanium Oxalate Crystals via Topotactic Transition
Author(s) -
Niu Ping,
Wu Tingting,
Wen Lei,
Tan Jun,
Yang Yongqiang,
Zheng Shijian,
Liang Yan,
Li Feng,
Irvine John T. S.,
Liu Gang,
Ma Xiuliang,
Cheng HuiMing
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201705999
Subject(s) - materials science , anatase , oxalate , photocatalysis , transition metal , carbon fibers , crystallite , titanium , chemical engineering , visible spectrum , oxide , lithium (medication) , titanium oxide , titanium dioxide , inorganic chemistry , metallurgy , composite material , optoelectronics , catalysis , organic chemistry , medicine , chemistry , composite number , engineering , endocrinology
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 TiO 2 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 TiO 2 (TiO 2– x C x ) shows an increased visible light absorption and a two orders of magnitude higher electrical conductivity than pure TiO 2 . 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.