Method for preparing anatase titanium dioxide sol used for solar batteries

A solar cell, titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of increasing the complexity of the preparation process and reaction cost, and achieve the effect of promoting the industrialization process, preventing contact and improving battery performance.

Inactive Publication Date: 2010-11-24
IRICO
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, for a long time, the preparation of dense titanium dioxide thin films mostly requires further heat treatment for cr

Method used

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  • Method for preparing anatase titanium dioxide sol used for solar batteries
  • Method for preparing anatase titanium dioxide sol used for solar batteries
  • Method for preparing anatase titanium dioxide sol used for solar batteries

Examples

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Embodiment 1

[0011] Example 1: First, mix 0.1 mol titanyl sulfate and water at 15-20°C with a titanium ion concentration of 2 mol / L, then let it stand for 12 hours for clarification, filter and co-precipitate with 1 mol / L ammonia water and titrate to 200 ml In deionized water, until the pH value is equal to 7, a white titanium hydroxide precipitate is obtained, centrifuged and washed 5 times, and then at 60 ° C, press Ti 4+ : oxalic acid: the molar ratio of hydrogen peroxide is 1: 5: 5 to dissolve, and then the pH value of this solution is adjusted to 7.5 with ammoniacal liquor, after standing for 12 hours, the titanium dioxide sol precursor is obtained, and then the titanium dioxide sol precursor is heated in hydrothermal A yellow anatase phase titanium dioxide sol was obtained after hydrothermal treatment at 90° C. for 20 h in a kettle.

Embodiment 2

[0012] Embodiment 2: first the TiCl of 0.1mol 4 With 400ml of 1mol / L NaHCO 3 Co-precipitation titration in 200ml deionized water to obtain a white titanium hydroxide precipitate, centrifuged and washed 5 times, and then at 50 ° C, press Ti 4+ :, citric acid: the molar ratio of hydrogen peroxide is 1: 5: 6 to dissolve, and then the pH value of this solution is adjusted to 7.5 with ammonia water, after standing for 12 hours, the titanium dioxide sol precursor is obtained, and then the titanium dioxide sol precursor is After hydrothermal treatment at 250° C. for 4 h in a hydrothermal kettle, a yellow anatase phase titanium dioxide sol was obtained.

Embodiment 3

[0013] Example 3: First, 0.1 mol of titanium sulfate and 400 ml of 1 mol / L NaOH were co-precipitated and titrated in 200 ml of deionized water to obtain a white titanium hydroxide precipitate, which was washed by centrifugation for 5 times, and then at 80 ° C, press Ti 4+ :, tartaric acid: the mol ratio of hydrogen peroxide is 1: 10: 10 and dissolves, and then the pH value of this solution is adjusted to 7.5 with ammoniacal liquor, after standing for 12 hours, the titanium dioxide sol precursor is obtained, and then the titanium dioxide sol precursor is dissolved in water After hydrothermal treatment at 160°C in a hot kettle for 6 hours, a yellow anatase phase titanium dioxide sol was obtained; as figure 1 As shown, the sol is composed of particles with a size of about 8nm, the particle size is uniform, and there is adhesion between the particles, which ensures the formation of a dense film, good charge transport ability and effective barrier electrolyte.

[0014] From figur...

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Abstract

The invention discloses a method for preparing anatase titanium dioxide sol used for solar batteries. The method comprises the following steps of: performing coprecipitation titration of a titanium source and reaction solution to obtain a white precipitate of titanium hydroxide, dissolving the precipitate in a molar ratio of Ti4<+> to organic acid to hydrogen peroxide of 1:2:2-1:10:10, adjusting a pH value to 7.5, and standing the mixed solution stand for 12 hours to obtain a precursor of titanium dioxide sol; and performing hydrothermal treatment of the precursor of titanium dioxide sol at the temperature of between 70 and 250 DEG C to obtain the yellow anatase titanium dioxide sol. The anatase titanium dioxide sol used for dye-sensitized solar batteries undergoes spin coating or spray coating to form a film which is the titanium dioxide dense film used for high-performance dye-sensitized solar batteries, the bonding degree between the titanium dioxide film and the matrix is improved, the contact between the electrolyte and an light anode can be effectively avoided, so that the electron recombination is lowered, the performance of the battery is greatly improved, and the industrialization of the dye-sensitized solar battery industry is pushed forward.

Description

technical field [0001] The invention belongs to the field of new material technology and new energy technology, and relates to a preparation method of titanium dioxide sol used in dye-sensitized solar cells and photocatalysis-related fields. Background technique [0002] Dye-sensitized solar cells have become a research hotspot in the field of solar cells due to their low cost, simple preparation process conditions and good environmental compatibility. And its core component, the titanium dioxide photoanode, plays an important role in loading sensitizers, collecting and conducting electrons, so the preparation of titanium dioxide thin films with composite morphology is an important direction of research and a prerequisite for its industrialization [Kuang, D. ; Wang, P.; Ito, S.; Zakeeruddin, S.M., Gra¨tzel, M.J. Am. Chem. Soc. 2006, 128, 7732.]. However, for a long time, the preparation of dense titanium dioxide thin films mostly requires further heat treatment for crystall...

Claims

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Application Information

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IPC IPC(8): C01G23/053
Inventor 刘文秀
Owner IRICO
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