The soft chemical synthesis of TiO2 (B) from layered titanates

Feist, Thomas; Davies, Peter K.

doi:10.1016/0022-4596(92)90184-w

Cited by 373 publications

(371 citation statements)

References 19 publications

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“…TiO 2 (B) is a metastable polymorph of titanium dioxide, first synthesized by Marchand et al in 1980 [14], which is formed by the dehydration of layered or tunnel-structured hydrogen titanates (H 2 Ti n O 2n+1 ) [15][16][17][18]. Later, in 1991, naturally occurring TiO 2 (B) was also identified in a natural anatase crystal by Banfield et al [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Addition of TiO2 nanowires in different polymorphs for dye-sensitized solar cells

2007

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TiO 2 (B) and TiO 2 anatase nanowires were prepared at 150• C for 120 h by a hydrothermal method followed by calcination in air at 400• C for 2 h and at 700 • C for 2 h for TiO 2 (B) and TiO 2 anatase, respectively. Although dye-sensitized solar cells (DSC) with fully nanowire electrodes showed a rather low light-to-electricity conversion efficiency of 1.33 % for TiO 2 (B) and 2.42% for TiO 2 anatase, 10 wt % nanowire-dispersed electrodes in a P-25 TiO 2 -nanoparticle matrix demonstrated improved efficiency of 6.17 % for TiO 2 (B) and 6.53% for TiO 2 anatase, these exceeding that of pure P-25 electrodes in this work (η=5.59%). The dominant mechanisms of the improvement at 10 wt% for the two different polymorphs are thought to be different, i.e., a light-scattering and film-thickness increment for the TiO 2 (B) system, whereas there is an improved conduction path through the matrix for the TiO 2 anatase system.

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Section: Introductionmentioning

confidence: 99%

Addition of TiO2 nanowires in different polymorphs for dye-sensitized solar cells

2007

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“…A few studies have reported the synthesis of brookite 3),4) and bronze. 5)7) The synthesis of brookite 8)10) and bronze 11),12) using water-soluble Ti complexes was also reported.…”

Section: Synthesis Of Four Polymorphs Of Tiomentioning

confidence: 99%

“…In contrast, hexagonal-plate-shaped particles were formed when hexamethylenetetramine was used. The chemical composition of the hexagonal particles was estimated to be Y 2 (NO 3 )(OH) 5 on the basis of XRD and TGDTA measure- ments. This hydroxynitrate forms hexagonal plate shapes by enthalpic crystal growth, in contrast to the growth of the amorphous carbonate particles.…”

Section: Morphology Control Of Photofunctional Ceramic Particles Prepmentioning

confidence: 99%

Synthesis of photofunctional ceramics by various solution processes

Tomita¹

2013

J. Ceram. Soc. Japan

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In this study, photofunctional ceramics such as phosphors and photocatalysts were synthesized by various solution methods. Titanium oxide (TiO 2 ) photocatalysts were synthesized via hydrothermal reactions of water-soluble titanium complexes. Singlephase anatase, rutile, brookite, and bronze were prepared using different pH levels and ligands. Thin films fabricated from bronze-phase TiO 2 showed photoinduced hydrophilicity, and the hydrophilic state was maintained for 5 days in darkness. Y 2 O 3 :Eu and YBO 3 :Tb phosphors with spherical, hexagonal-plate, and cubical shapes were prepared by precipitation from homogeneous solutions; nanoparticles of these oxides were also prepared. The morphology of the prepared Ag 3 PO 4 photocatalyst particles was controlled to be rhombic dodecahedral, dodecapodal, or tetrapodal by precipitation from homogeneous solutions. Oxide up-conversion phosphors were investigated, and CeO 2 doped with Yb, Er, Ho, or Tm by parallel synthesis using the polymerizable complex method was found to be a superior polychromatic up-conversion phosphor.

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“…Recently, we demonstrated reversible electrochemical Li insertion and extraction behavior of hydrogen titanium oxide H 2 7) They were not able to determine the crystal structure of H 2 Ti 12 O 25 , but they reported about the crystal system and a part of the lattice parameters from electron diffraction pattern and powder X-ray diffraction pattern.…”

Section: )4)mentioning

confidence: 99%