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Titanium dioxide/graphene composite photoanode and preparation method thereof

A titanium dioxide and graphene technology, applied in the field of dye-sensitized solar cells, can solve the problems of affecting the performance of DSSC, reducing connectivity, and reducing the transmission rate of photogenerated charges, etc., and achieves strong light transmittance and light utilization efficiency, low cost, and repeatability sex high effect

Inactive Publication Date: 2019-08-02
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Studies have shown that when titanium dioxide nanoparticles are used as a film, although their specific surface area is large and can absorb a large amount of dyes, their more or larger pores will lead to a decrease in the connectivity between titanium dioxide nanoparticles, thus making the photogenerated charge in the titanium dioxide film The transfer rate decreases within the DSSC, affecting the performance of the

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  • Titanium dioxide/graphene composite photoanode and preparation method thereof
  • Titanium dioxide/graphene composite photoanode and preparation method thereof

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preparation example Construction

[0027] The preparation method of described a kind of titanium dioxide / graphene composite photoanode comprises the following steps:

[0028] Step 1: The preparation of the mixed slurry of titanium dioxide, graphene, iodine simple substance, ethanol, acetone, concrete steps are as follows:

[0029] Step (11): Put the titanium dioxide in a mortar, then add ethanol, then grind the titanium dioxide powder until it is evenly dispersed, transfer it to a beaker, and then add acetone solvent; wherein, the volume ratio of ethanol to acetone is 1:(4~5) , the concentration of titanium dioxide dissolved in ethanol is (6-7.5) mg / ml;

[0030] Step (12): Add graphene to the mixed slurry of titanium dioxide, ethanol and acetone formed in step one, then place the beaker in an ultrasonic cleaner and ultrasonically disperse the slurry until the slurry is uniform; wherein the mass ratio of graphene to titanium dioxide is (0.1~0.2)%;

[0031] Step (13): Add iodine to the mixed slurry of titanium ...

specific Embodiment 1

[0036] The preparation method of described a kind of titanium dioxide / graphene composite photoanode comprises the following steps:

[0037] Step 1: The preparation of the mixed slurry of titanium dioxide, graphene, iodine simple substance, ethanol, acetone, concrete steps are as follows:

[0038] Step (11): Put the P25 titanium dioxide powder in an oven, place it at 240°C for 24 hours, take 60mg of titanium dioxide powder and place it in a mortar, add 10ml of ethanol, grind the titanium dioxide powder for 10min until it is evenly dispersed, and then transfer it to 50ml Beaker, then add acetone solvent and make the volume to 50ml;

[0039]Step (12): Add graphene to the mixed slurry of titanium dioxide, ethanol and acetone formed in step 1. The quality of graphene is between 0.06 and 0.12 mg. Seal the beaker with a parafilm, and place the beaker in an ultrasonic wave. Ultrasound in the cleaner for 30 minutes until the slurry is evenly dispersed;

[0040] Step (13): Add 12 mg o...

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Abstract

The invention discloses a titanium dioxide / graphene composite photoanode, which comprises the following raw materials: titanium dioxide, graphene, elemental iodine, ethanol and acetone, wherein the volume ratio of ethanol and acetone is 1:(4-5), the mass ratio of graphene and titanium dioxide is (0.1-0.2)%, the mass ratio of elemental iodine and titanium dioxide is (15-20)%, and the concentrationof titanium dioxide dissolved in ethanol is (6-7.5)mg / ml. The invention has the advantages that the photoanode is good in charge transmission performance, and the photoelectric conversion efficiency aDSSC (Dye-Sensitized Solar Cell) is high.

Description

technical field [0001] The invention belongs to the field of dye-sensitized solar cells, in particular to a titanium dioxide / graphene composite photoanode and a preparation method thereof. [0002] technical background [0003] Dye-sensitized solar cell (DSSC) is a new type of solar cell. Due to its low cost, simple preparation, and high photoelectric conversion efficiency, it has become one of the solar cells with great research value and commercial potential. It is of great significance to achieve sustainable development. [0004] Dye-sensitized solar cells are composed of five parts, which are transparent conductive glass, photoanode, dye sensitizer, oxidation-reduction electrolyte and counter electrode. Among them, the photoanode plays the role of dye adsorption and conduction of photogenerated carriers. Its properties will directly affect the key processes of the battery, such as light absorption, charge transfer, and interface contact between electrodes and electrolyte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01G9/20
CPCH01G9/2031H01G9/2059Y02E10/542
Inventor 曹大鹏殷惠明
Owner NANJING UNIV OF POSTS & TELECOMM
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