Method for preparing nano crystal thin film from nano particles

A nanoparticle and nanocrystal technology, applied in the fields of nanostructure manufacturing, nanotechnology, nanotechnology, etc., can solve the problem that the stabilizer is difficult to achieve satisfactory, and achieve the effect of reducing impact, low cost, and solving precipitation and aggregation.

Inactive Publication Date: 2005-03-02
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is well known that due to the large surface energy of nanoparticles, the aggregation will be more obvious as the particle size is further reduced, and it is difficult to achieve satisfactory results by adding stabilizers.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Three kinds of titanium dioxide powders were used to prepare respectively.

[0015] Commercial nano titanium dioxide P25 powder (Degussa, particle size 36 nm, containing 83% anatase);

[0016] Two kinds of titanium dioxide powder prepared according to Chinese patent 1373089A (2002): TiO 2 I (particle size 26 nm, containing 71% anatase), TiO 2 II (particle size 26 nm, containing 100% anatase) powder.

[0017] Wherein its cost of two kinds of titanium dioxide powders prepared by Chinese patent 1373089A (2002) only has 1 / 2 of P25; layer phenomenon. Using the above three kinds of titanium dioxide nanopowders as raw materials, prepare nanocrystalline thin films according to the following method of the present invention: mix titanium dioxide powder with ethanol and acetylacetone and ball mill for 0.5 to 5 hours; then add ethanol and Triton X-100 and continue ball milling for 1 to 5 hours. 10 hours. A certain thickness of adhesive tape (about 20 mm thick) is adhered paral...

Embodiment 2

[0022] The first ball milling adopts the sol with the mass ratio of titanium dioxide: ethanol: acetylacetone of 1:1.5:3, the second ball milling adopts the sol with the mass ratio of titanium dioxide: ethanol: Triton X-100 of 1:10:6, and the thickness of the tape is For 40 mm, the coating process temperature is 30 °C to prepare thin films. The results show that the thickness of the obtained film is 2 micrometers, and the size of TiO per square centimeter 2 I. TiO 2 The II and P25 films produced areas of 151, 142, and 148 cm2, respectively.

Embodiment 3

[0024] The first ball milling uses titanium dioxide: ethanol: acetylacetone: a sol of 1:1.5:1, the second ball milling uses a sol with a mass ratio of titanium dioxide: ethanol: Triton X-100 of 1:5:2, and the thickness of the tape is 20 mm, the temperature of the coating process was 50°C, and the film was prepared. The results showed that the thickness of the obtained film was 3 microns, and the size of TiO per square centimeter 2 I. TiO 2 The II and P25 films were able to produce areas of 208, 195, and 201 cm2, respectively.

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Abstract

The invention provides a prepn. method of nano crystal thin film using nano particle. Powder coating method of mixing, ball-milling, coating and firing is used in the invention. Nano particle powder, alcohol and acetylacetone are mixed and processed by ball-milling 0.5-5 hours, then ball-milling 1-10 hours by adding alcohol and triton X-100; temp. of said coating process is 10-70 deg.C. The invention resolves problems that idiozome solution storage period is short and easy to be deposited and accumulated.

Description

technical field [0001] The invention relates to a method for preparing a nanocrystalline thin film, in particular to a method for preparing a nano-titanium dioxide thin film used for a semiconductor electrode of a dye-sensitized nanocrystalline thin-film solar cell, which belongs to the field of nanomaterials and also belongs to the field of photoelectric conversion solar cells . Background technique [0002] Dye-sensitized nanocrystalline thin-film solar cells have remarkable high energy conversion efficiency and low cost. As the main components of devices, semiconductor microporous nanocrystalline thin films for improving the amount of dye adsorption have attracted more and more attention. The film is typically prepared from nanocrystalline metal oxide starting materials with a size of 5 to 100 nanometers, which are then sintered together to form an interconnected porous structure film. Due to its good thermodynamic stability, low cost and simple preparation process, tit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/00B82B3/00C01G1/02C01G9/02C01G23/04H01G9/20H01L31/18
CPCY02E10/50Y02P70/50
Inventor 赵兴中韩宏伟
Owner WUHAN UNIV
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