Porous spherical titanium dioxide with controllable diameter and preparation and application thereof

A titanium dioxide, porous spherical technology, applied in titanium dioxide, titanium oxide/hydroxide, nanotechnology for materials and surface science, etc., can solve the problems of long time, high hydrothermal temperature, complex production process, etc. Uniformity, good optoelectronic properties, simple preparation process

Inactive Publication Date: 2014-04-23
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] But the controllable range of sphere size in this synthesis method is small (320-1150nm) [Journal of America Chemistry Society 132 (2010) 4438–4444], production process More complicated, including two steps of precursor preparation and hydrothermal reaction, and the hydrothermal temperature is high and the time is long
This brings great difficulty to the industrial production of DSSC

Method used

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  • Porous spherical titanium dioxide with controllable diameter and preparation and application thereof
  • Porous spherical titanium dioxide with controllable diameter and preparation and application thereof
  • Porous spherical titanium dioxide with controllable diameter and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 12g of 0.5mol / L titanium tetrachloride deionized aqueous solution, 2.4g of urea, 2g of polyvinylpyrrolidone of type K30, and 24g of ethanol, stir the mixture of the four, and then ultrasonically disperse. Transfer the above-mentioned homogeneously mixed clear solution to a stainless steel hydrothermal kettle with a polytetrafluoroethylene substrate, at 120 o C reacted for 2h. The white precipitate obtained after the reaction was centrifuged with ethanol and washed at 70 o C dry, with 5 o The heating rate of C / min is raised to 500 o C was calcined for 0.5 h to prepare porous spherical titanium dioxide with an average diameter of 1 μm. The scanning electron microscope morphology of the prepared spherical porous titanium dioxide is as follows: figure 1 shown.

Embodiment 2

[0029] Weigh 12g of 0.5mol / L titanium tetrachloride deionized aqueous solution, 2.1g of urea, 2g of polyvinylpyrrolidone of type K30, and 24g of ethanol, stir the mixture of the four, and then ultrasonically disperse. Transfer the above-mentioned homogeneously mixed clear solution to a stainless steel hydrothermal kettle with a polytetrafluoroethylene substrate, at 120 o C reacted for 2h. The white precipitate obtained after the reaction was centrifuged with ethanol and washed at 70 o C dry, with 5 o The heating rate of C / min is raised to 500 o C was calcined for 0.5h to prepare porous spherical titanium dioxide with a diameter of about 700nm. The scanning electron microscope morphology of the prepared spherical porous titanium dioxide is as follows: figure 2 shown.

Embodiment 3

[0031] Weigh 12g of 0.5mol / L titanium tetrachloride deionized aqueous solution, 1.8g of urea, 2g of polyvinylpyrrolidone of type K30, and 24g of ethanol, stir the mixture of the four, and then ultrasonically disperse. Transfer the above-mentioned homogeneously mixed clear solution to a stainless steel hydrothermal kettle with a polytetrafluoroethylene substrate, at 120 o C reacted for 2h. The white precipitate obtained after the reaction was centrifuged with ethanol and washed at 70 o C dry, with 5 o The heating rate of C / min is raised to 500 o C was calcined for 0.5h to prepare porous spherical titanium dioxide with a diameter of about 400nm. The scanning electron microscope morphology of the prepared spherical porous titanium dioxide is as follows: image 3 shown.

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Abstract

The invention discloses porous spherical titanium dioxide with controllable diameter and preparation and application thereof, belonging to the technical field of titanium dioxide and application thereof. The porous spherical titanium dioxide with controllable diameter is a sphere with diameter of 150nm-4mu m, which is gathered by granule titanium dioxide. The preparation process comprises steps of carrying out reaction on titanium tetrachloride water solution and reaction liquid prepared by urea, polyvinylpyrrolidone and ethyl alcohol, washing, drying and calcining the precipitate so as to obtain the porous spherical titanium dioxide with controllable diameter. The preparation has the advantages of having simple processes, being applicable to industrial production, and realizing control on diameter size of the spherical titanium dioxide by controlling the proportion of raw material amount. The prepared spherical titanium dioxide has large specific surface area, has multiple pores inside, is used for preparing dye sensitization solar energy batteries and endows the dye sensitization solar energy batteries with good photoelectric property.

Description

technical field [0001] The invention relates to the preparation and application of porous spherical titanium dioxide with controllable diameter, and belongs to the technical field of titanium dioxide and its application. Background technique [0002] Semiconductor thin films composed of nano-semiconductors have attracted much attention in recent years. Nano-semiconductors have many singular characteristics and extraordinary special functions that cannot be compared with conventional semiconductors, and have unprecedented application prospects in many fields. With the increasing demand for energy, people's desire to use solar energy is becoming stronger and stronger. Currently popular solar cells on the market are mainly monocrystalline and polycrystalline silicon cells based on silicon. [0003] Since the 1990s, dye-sensitized solar cells (DSSC for short) have attracted much attention due to their low cost and simple preparation process. Since the research team led by Pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/08H01G9/042B82Y30/00B82Y40/00
Inventor 冯亚青彭啸孟舒献于向梅杨雁博
Owner TIANJIN UNIV
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