Titanium (IV) Oxide Thin Films Prepared from Aqueous Solution

Deki, Shigehito; Aoi, Yoshifumi; Hiroi, Osamu; Kajinami, Akihiko

doi:10.1246/cl.1996.433

Cited by 253 publications

(197 citation statements)

References 4 publications

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“…The formation of the metal oxides in the solution is thought to proceed via the equilibrium reaction (1), which shifts to righthand side upon the addition of H3BO3 or Al metal (F -scavenger) which readily react F -ions to form more stable complex ions. The shift of the equilibrium reaction was precisely controlled by the amount of F -scavenger.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium of dissolving species in aqueous H2SiF6 solution during the liquid phase deposition reaction

Mizuhata

Saito

Takee

et al. 2009

J. Ceram. Soc. Japan

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The equilibrium reaction of H2SiF6 solution in the LPD method was investigated by the measurement of UV and IR spectroscopies, vapor pressure and electric conductivity. These measurements were carried out by adding the F -scavenger such as H3BO3 and Al metal which shifts the equilibrium reaction. The experimental results strongly suggested the presence of SiF4 and [SiF6·SiF4] 2-in H2SiF6 solution. These species were estimated to be involved in the LPD process as intermediates and important for controlling the deposition process of metal oxide.

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Section: Introductionmentioning

confidence: 99%

Equilibrium of dissolving species in aqueous H2SiF6 solution during the liquid phase deposition reaction

Mizuhata

Saito

Takee

et al. 2009

J. Ceram. Soc. Japan

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“…4 indicate that all inverse opals were in anatase phase. The LPD deposition used in this manuscript was developed by Deki et al [31]. The total reaction scheme is:…”

Section: Quality Of Polystyrene Opals and Inverse Opalsmentioning

confidence: 99%

Pore size dependence of self-assembled type photonic crystal on dye-sensitized solar cells efficiency utilising Chlorine e6

et al. 2013

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There are few reports on photoelectric conversion efficiency using naturally-occurring dyes for dyesensitized solar cells (DSSC). This is because the matching with an excited electronic level of naturally-occurring dye to the conduction band of semiconductor is problematic; the excited electrons are easily relaxed to the steady state with fluorescence or heat emission. We examined the fluorescence inhibition effect of a self-assembled photonic crystal using Chlorine e6 dye. Chlorine e6 is derived from chlorophyll and has a long excited electron lifetime. We prepared TiO 2 inverse opals with various particle sizes by liquid phase deposition and described their effect on DSSCs with regard to structural, optical and electrochemical properties. In addition, we explored the implications of fluorescence lifetime measurements relative to the photonic band diagram and the amount of adsorbed dye. Although the main factor affecting the external photoelectric conversion efficiency was the diffusion resistance of the electrolyte and the contact resistance between TiO 2 interfaces, the possibility that the dye fluorescence lifetime, i.e. the photonic band structure, can affect the internal quantum efficiency per one dye molecule was also investigated.

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“…Boric acid acted as fluoride scavenger allowing a controlled hydrolysis of the titania fluorocomplexes, leading to tetrafluoroborate (BF 4 À ) anion formation and TiO 2 precipitation. 44 After BA addition, the mixture was irradiated in an open 100 mL PTFE beaker during intervals of 15 s at 800 W, using a LG Intellowave 2.45 GHz microwave oven. Two-minute resting periods were established between irradiation intervals for limiting the temperature increase.…”

Section: Tio 2 Nanoparticles Synthesized Using a Domestic Mw Ovenmentioning

confidence: 99%

Microwaves as a synthetic route for preparing electrochemically active TiO₂ nanoparticles

et al. 2012

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Nanocrystalline anatase was synthesized, using both domestic and laboratory microwave ovens, from different precursors. Nanoparticulate anatase was obtained after microwave irradiation of tetra-butyl orthotitanate solution in benzyl alcohol. As-synthesized samples have orange color due to the presence of organics that were eliminated after annealing at 500°C, whereas the size of small anatase nanocrystals (around 8 nm) was preserved. Other nanocrystalline anatase samples were obtained from hexafluorotitanate-organic salt ionic liquid-like precursors. In this case, use of a domestic microwave oven and very short processing times (1-3 min irradiation time) were involved. Good specific capacity values and capacity retention at high C rates for insertion/deinsertion of Li 1 were recorded when testing such nanoparticles as electrode material in lithium cells. The electrochemical performances were found be strongly dependent on the phase composition, which in turn could be tuned through the synthetic procedure.

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Titanium (IV) Oxide Thin Films Prepared from Aqueous Solution

Cited by 253 publications

References 4 publications

Equilibrium of dissolving species in aqueous H2SiF6 solution during the liquid phase deposition reaction

Equilibrium of dissolving species in aqueous H2SiF6 solution during the liquid phase deposition reaction

Pore size dependence of self-assembled type photonic crystal on dye-sensitized solar cells efficiency utilising Chlorine e6

Microwaves as a synthetic route for preparing electrochemically active TiO₂ nanoparticles

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Titanium (IV) Oxide Thin Films Prepared from Aqueous Solution

Cited by 253 publications

References 4 publications

Equilibrium of dissolving species in aqueous H2SiF6 solution during the liquid phase deposition reaction

Equilibrium of dissolving species in aqueous H2SiF6 solution during the liquid phase deposition reaction

Pore size dependence of self-assembled type photonic crystal on dye-sensitized solar cells efficiency utilising Chlorine e6

Microwaves as a synthetic route for preparing electrochemically active TiO2 nanoparticles

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Microwaves as a synthetic route for preparing electrochemically active TiO₂ nanoparticles