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Method for preparing modified titanium dioxide nanotube dye-sensitized photoanode thin film

A technology of titanium dioxide and dye sensitization, which is applied in the field of dye-sensitized solar cells, can solve the problems of difficult solar cell performance and high energy consumption, and achieve the effects of improving electron transmission rate, increasing open circuit voltage, and improving sunlight utilization efficiency

Inactive Publication Date: 2012-05-30
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, they are still not widely used. The reasons include that the performance of solar cells themselves is difficult to match with traditional fossil energy power generation technology at this stage; silicon solar cell manufacturing itself is an energy-intensive industry

Method used

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  • Method for preparing modified titanium dioxide nanotube dye-sensitized photoanode thin film

Examples

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example 1

[0026] (1) Weigh 0.7612g of thiourea into a 50ml beaker, dissolve it in 10ml of ethanol aqueous solution with a volume ratio of 1:1, add 5ml of 4M titanium tetrachloride hydrochloric acid solution dropwise to the thiourea solution, and stir for 1 hour , Aging for 24 hours to obtain titanium dioxide sol A doped with S and N elements;

[0027] (2) Preparation of titanium dioxide nanotubes by hydrothermal synthesis. Weigh 6 g of commercially available titanium dioxide P-25, add it to a 15M sodium hydroxide solution and stir for 24 hours. The suspension was put into a stainless steel reaction kettle lined with polytetrafluoroethylene and placed in an oven at 60°C for 96 hours of reaction. After centrifugal separation, a white solid product was obtained, which was washed with deionized water to neutrality (PH=7). The water-washed product was added to 0.1M hydrochloric acid and stirred for 10 hours, and finally washed with deionized water to neutral (PH=7), washed with absolute ethan...

example 2

[0033] (1) Weigh 0.7612g of tetrabutylammonium into a 50ml beaker, dissolve it in 10ml of ethanol aqueous solution with a volume ratio of 1:1, add 5ml of 4M titanium propoxylate solution dropwise to the tetrabutylammonium solution, Stir for 1 hour and aging for 24 hours to obtain titanium dioxide sol A doped with C and N elements;

[0034] (2) Prepare titanium dioxide nanotubes by hydrothermal synthesis. Weigh 6 g of commercially available titanium dioxide P-25, add it to a 7M sodium hydroxide solution and stir for 24 hours. The suspension was put into a stainless steel reaction kettle lined with polytetrafluoroethylene and placed in an oven at 90°C to react for 92 hours. After centrifugal separation, a white solid product was obtained, which was washed with deionized water to neutrality (PH=7). The water-washed product was added to 0.1M hydrochloric acid and stirred for 9 hours, and finally washed with deionized water to neutrality (PH=7), washed 3 times with absolute ethanol,...

example 3

[0040] (1) Take 10ml of tetrabutyl titanate solution in a beaker, add 10ml of absolute ethanol to it, and finally 2ml of 0.5M tin chloride solution, the molar ratio of titanium salt to tin salt is 20:1, stir for 2h, aging After 24 hours, Sn-doped titanium dioxide sol A was obtained.

[0041] (2) Prepare titanium dioxide nanotubes by hydrothermal synthesis. Weigh 6 g of commercially available titanium dioxide P-25, add it to a 15M sodium hydroxide solution and stir for 24 hours. The suspension was put into a stainless steel reaction kettle lined with polytetrafluoroethylene and placed in an oven at 120°C for 90 hours of reaction. After centrifugal separation, a white solid product was obtained, which was washed with deionized water to neutrality (PH=7). The water-washed product was added to 0.1M hydrochloric acid and stirred for 6 hours, and finally washed with deionized water to neutrality (PH=7), washed with absolute ethanol 3 times, centrifuged, and dried at 70°C to obtain ti...

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Abstract

The invention discloses a method for preparing a modified titanium dioxide nanotube dye-sensitized photoanode thin film, and belongs to the field of dye-sensitized solar cells. The method comprises the following steps of: mixing titanium salt solution and a dopant to prepare doped titanium dioxide sol A; preparing titanium dioxide nanotubes by a hydrothermal synthesis method; dipping the titaniumdioxide nanotubes in metal or non-metal dopant solution to obtain titanium dioxide nanotube powder B; mixing the powder B and the sol A and fully grinding to obtain titanium dioxide nanocrystalline slurry C; coating the sol A onto a conductive substrate and drying; coating the obtained nanocrystalline slurry C onto the conductive substrate on which the sol A is coated to obtain a titanium dioxidenanotube thin film electrode D; drying the D and performing thermal treatment to obtain a doped titanium dioxide nanotube nanocrystalline thin film electrode E; and soaking the E in ethanol solution of 4,4'-dicarboxylic bipyridyl ruthenium, washing with absolute ethanol and drying with nitrogen gas. The method has the advantages of simple preparation process, high repeatability and low cost.

Description

Technical field [0001] The invention belongs to the field of dye-sensitized solar cells, in particular a method for preparing a metal and non-metal-doped low energy gap nanocrystalline semiconductor photoanode based on titanium dioxide nanotubes and its application in dye-sensitized solar cells. Background technique [0002] In the world's energy structure, one-off petrochemical energy sources such as oil, natural gas, and coal occupy the dominant position. With the sharp decline of petrochemical energy and the increasingly serious environmental pollution, it is urgent to develop clean and renewable energy. Solar energy is an inexhaustible, inexhaustible, pollution-free, cheap, and freely available energy source for humans. Compared with wind energy and hydropower, solar energy is not restricted by geographical conditions and can be used on a large scale. [0003] As the most ideal energy source, solar cell utilization technology has been valued and used by more and more countries...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/48H01G9/042H01G9/20H01M14/00
CPCY02E10/542Y02E10/50Y02E10/549Y02P70/50
Inventor 张敬畅韩志跃王斯琪杨秀英曹维良
Owner BEIJING UNIV OF CHEM TECH
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