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Room‐Temperature Synthesis of High Surface Area Anatase TiO 2 Exhibiting a Complete Lithium Insertion Solid Solution
Author(s) -
Patra Snehangshu,
Davoisne Carine,
Bruyère Stéphanie,
Bouyanfif Houssny,
Cassaig Sophie,
Taberna PierreLouis,
Sauvage Frédéric
Publication year - 2013
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201300178
Subject(s) - anatase , lithium (medication) , amorphous solid , crystallization , chemical engineering , materials science , nanoparticle , particle (ecology) , specific surface area , phase (matter) , nanotechnology , chemistry , crystallography , photocatalysis , organic chemistry , catalysis , medicine , oceanography , geology , engineering , endocrinology
The synthesis of highly divided anatase TiO 2 nanoparticles displaying 300 m 2 g −1 surface area is achieved by following a two‐step synthetic process at room temperature. The particles exhibit a needle‐like morphology composed of self‐assembled 4 nm nanoparticles. The crystallization process from amorphous TiO 2 .1.6H 2 O to oriented aggregation of anatase TiO 2 proceeds according to a slow solid dehydration process taking place in a large range of pH in deionized water (1 < pH < 12) or alternatively when including a low amount of NH 4 F (aq) in solution. Driven by their high surface area enhancing the chemical/electrochemical reactivity, it is reported in the case of the anatase TiO 2 that a modification in the lithium insertion mechanism is no longer attributable to a two‐phase reaction between the two‐end members Li ε TiO 2 and Li 0.5± α TiO 2 when downsizing the particle size, but instead through a complete solid solution all along the composition range.