Titanium dioxide mesoporous layer of a double-size nano network and preparation method thereof

A technology of titanium dioxide and nano-network, applied in the direction of final product manufacturing, sustainable manufacturing/processing, climate sustainability, etc., can solve the problems that are not suitable for large-scale industrial production, spin-coated films have many hole-like defects, and large-area coatings are difficult to achieve and other problems, to achieve the effect of improving photoelectric conversion efficiency, improving sunlight absorption efficiency, and good effect

Inactive Publication Date: 2018-10-02
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] But above-mentioned spin-coating method has the following problems: the spin-coated film has more hole-like defects, the surface is not smooth, and the battery conversion efficiency is relatively poor; Process reasons are not suitable for large-scale industrial production

Method used

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  • Titanium dioxide mesoporous layer of a double-size nano network and preparation method thereof
  • Titanium dioxide mesoporous layer of a double-size nano network and preparation method thereof
  • Titanium dioxide mesoporous layer of a double-size nano network and preparation method thereof

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preparation example Construction

[0024] The preparation method of the titanium dioxide mesoporous layer of the double-size nano network of the present invention, the steps are as follows:

[0025] Step 1, the TiO 2 added to ethanol for dilution, the TiO 2 The mass ratio with ethanol is 2:(5~9), the obtained TiO 2 The diluted solution was sonicated for 20-50 minutes to obtain a milky white suspension;

[0026] Step 2, use the electrostatic spray method to prepare the milky white suspension obtained in step 1 as TiO 2 Mesoporous layer primary film, the spraying parameters of the electrostatic spraying method are: height 10cm, flow rate 20-150μL / min, voltage 20kV, time 20-40s;

[0027] Step 3, the TiO 2 The mesoporous primary film is dried on a heating plate at 110°C to 140°C, then placed in an annealing furnace for annealing treatment, heated from room temperature to 480°C to 520°C, and then annealed at this temperature for 20 to 40 minutes to obtain TiO 2 mesoporous film.

[0028] The multi-jet electrost...

Embodiment 1

[0031] The preparation method of the titanium dioxide mesoporous layer of the double-size nano network of the present invention, the steps are as follows:

[0032] Step 1, the TiO 2 added to ethanol for dilution, the TiO 2 The mass ratio with ethanol is 2:7, the obtained TiO 2 The diluted solution was sonicated for 30 minutes to obtain a milky white suspension;

[0033]Step 2, use the electrostatic spray method to prepare the milky white suspension obtained in step 1 as TiO 2 Mesoporous layer primary film, the spraying parameters of the electrostatic spraying method are: height 10cm, flow rate 60μL / min, voltage 20kV, time 30s;

[0034] Step 3, the TiO 2 The mesoporous layer primary film is dried on a heating plate at 125°C, then placed in an annealing furnace for annealing treatment, heated from room temperature to 500°C, and then annealed at this temperature for 30 minutes to obtain TiO 2 mesoporous film.

Embodiment 2

[0036] The preparation method of the titanium dioxide mesoporous layer of the double-size nano network of the present invention, the steps are as follows:

[0037] Step 1, the TiO 2 added to ethanol for dilution, the TiO 2 The mass ratio with ethanol is 2:7, the obtained TiO 2 The diluted solution was sonicated for 30 minutes to obtain a milky white suspension;

[0038] Step 2, use the electrostatic spray method to prepare the milky white suspension obtained in step 1 as TiO 2 Mesoporous layer primary film, the spraying parameters of the electrostatic spraying method are: height 10cm, flow rate 100μL / min, voltage 20kV, time 30s;

[0039] Step 3, the TiO 2 The mesoporous layer primary film is dried on a heating plate at 125°C, then placed in an annealing furnace for annealing treatment, heated from room temperature to 500°C, and then annealed at this temperature for 30 minutes to obtain TiO 2 mesoporous film.

[0040] 4) Characterization

[0041] image 3 (a) is TiO2 wh...

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Abstract

The invention discloses a dual-dimensional nano-networked titanium dioxide mesoporous layer. The titanium dioxide mesoporous layer comprises titanium dioxide nanoparticles a and b with two kinds of dimensions; and the titanium dioxide nanoparticles with two kinds of dimensions are uniformly distributed in space. The preparation method for the titanium dioxide mesoporous layer comprises the steps of adding TiO<2> into ethyl alcohol to be diluted, and performing ultrasonic processing on the obtained TiO<2> diluted solution to obtain a milk white turbid liquid; preparing the milk white turbid liquid obtained in the step 1 into a TiO<2> mesoporous layer primary thin film through an electrostatic spray method; and after drying the TiO<2> mesoporous layer primary thin film on a heating plate, putting the TiO<2> mesoporous layer primary thin film into an annealing furnace to be subjected to annealing treatment to obtain a TiO<2> mesoporous layer thin film. According to the dual-dimensional nano-networked titanium dioxide mesoporous layer, the large-dimensional nanoparticles have the grain diameters of several hundreds of nanometers based on magnitude order, so that sunshine can be effectively scattered while optical energy absorptivity can be improved; and the small-dimensional nanoparticles have the grain diameters of dozens of nanometers based on magnitude order, so that the specific surface area of the mesoporous layer can be effectively enlarged, and an adsorption area of a perovskite light absorption material can be enlarged, thereby improving photoelectric conversion efficiency.

Description

technical field [0001] The invention relates to the technical field of thin film preparation, in particular to a titanium dioxide mesoporous layer of a double-sized nano network and a preparation method thereof. Background technique [0002] At present, the spin-coating method is the main film-forming method for the titanium dioxide mesoporous layer. The spin-coating method is also called the uniform glue method because the liquid used in the spin-coating method is generally high in viscosity. The spin coating process is mainly divided into three parts: drop solution, spin and solvent evaporation. First, the solution is dropped onto the substrate, and then the solution is evenly distributed by high-speed rotation, and finally a thin film is formed by the volatilization of the solvent. Generally, spin coating is divided into two speed ranges. In the first stage, the colloidal liquid can be spread out by using a lower speed for several seconds; Thin films ranging from hundre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0216H01L31/18
CPCH01L31/02168H01L31/18Y02E10/50Y02P70/50
Inventor 顾文华易武明曹周彬
Owner NANJING UNIV OF SCI & TECH
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