ANATASE TYPE TiO2 NANORODS AND ITS PREPARATION METHOD
First Claim
1. A process for preparing titania nanorods for dye sensitized or quantum-dot nanoparticle sensitized solar cells, comprising:
- (a) slowly adding dropwise chilled distilled water to titanium tetrachloride (TiCl4) to prepare solution of titanium oxychloride (TiOCl2);
(b) adding basic solution thereto to maintain pH of the titanium oxychloride solution within a range from 3.5 to 4, thereby providing a suspension of titanium oxyhydroxide (TiO(OH)2) precipitate;
(c) adding basic solution thereto to adjust the suspension of titanium oxyhydroxide precipitate to be weakly basic, and heating and stirring the mixture at 80 to 100°
C.;
(d) isolating and collecting titanium oxyhydroxide from the heated and stirred suspension of titanium oxyhydroxide precipitate, and washing it with weakly basic aqueous solution; and
(e) adding distilled water and 20 to 500 folds of hydrogen peroxide (H2O2) on the basis of 1 mole of Ti4+ in titanium oxyhydroxide to the washed titanium oxyhydroxide, and heat-treating the mixture at a temperature of 90 to 100°
C. for 1 to 7 days to prepare titania nanorods having the mean length of 100 nm to 300 nm.
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Accused Products
Abstract
Provided is a process which includes slowly adding dropwise chilled distilled water to titanium tetrachloride to prepare solution of titanium oxychloride; adding basic solution thereto to maintain pH of the titanium oxychloride solution within a range from 3.5 to 4, thereby providing a suspension of titanium oxyhydroxide precipitate; adding basic solution thereto to adjust the suspension of titanium oxyhydroxide precipitate to be weakly basic, and heating and stirring the mixture at 80 to 100° C.; isolating and collecting dihydroxy-oxotitanium from the heated and stirred suspension of titanium oxyhydroxide precipitate, and washing it with weakly basic aqueous solution; and adding distilled water and 20 to 500 folds of hydrogen peroxide on the basis of 1 mole of Ti4+ in titanium oxyhydroxide to the washed titanium oxyhydroxide, and heat-treating the mixture at a temperature of 90 to 100° C. for 1 to 7 days to prepare titania nanorods having the mean length of 100 nm to 300 nm.
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Citations
8 Claims
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1. A process for preparing titania nanorods for dye sensitized or quantum-dot nanoparticle sensitized solar cells, comprising:
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(a) slowly adding dropwise chilled distilled water to titanium tetrachloride (TiCl4) to prepare solution of titanium oxychloride (TiOCl2); (b) adding basic solution thereto to maintain pH of the titanium oxychloride solution within a range from 3.5 to 4, thereby providing a suspension of titanium oxyhydroxide (TiO(OH)2) precipitate; (c) adding basic solution thereto to adjust the suspension of titanium oxyhydroxide precipitate to be weakly basic, and heating and stirring the mixture at 80 to 100°
C.;(d) isolating and collecting titanium oxyhydroxide from the heated and stirred suspension of titanium oxyhydroxide precipitate, and washing it with weakly basic aqueous solution; and (e) adding distilled water and 20 to 500 folds of hydrogen peroxide (H2O2) on the basis of 1 mole of Ti4+ in titanium oxyhydroxide to the washed titanium oxyhydroxide, and heat-treating the mixture at a temperature of 90 to 100°
C. for 1 to 7 days to prepare titania nanorods having the mean length of 100 nm to 300 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification