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A kind of titanium dioxide microsphere with hierarchical porous structure and its preparation method and application

A technology of titanium dioxide and multi-level pores, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, photosensitive equipment, etc., can solve the problems of difficult industrial production of multi-level structure TiO2, complex process, non-continuity, etc., and achieve the improvement of photoelectric conversion efficiency , Simple operation, fast response effect

Active Publication Date: 2016-04-13
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods generally have complex processes, high energy consumption, and cannot be continuous, so it is difficult to achieve multi-level structure TiO 2 industrial production of

Method used

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  • A kind of titanium dioxide microsphere with hierarchical porous structure and its preparation method and application
  • A kind of titanium dioxide microsphere with hierarchical porous structure and its preparation method and application
  • A kind of titanium dioxide microsphere with hierarchical porous structure and its preparation method and application

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Embodiment 1

[0027] Dissolve titanium tetrachloride in deionized water (concentration is 0.1mol / L), SiO 2 The nanoparticles are uniformly dispersed into the solution to form a suspension (titanium tetrachloride and SiO 2 The mass ratio of nanoparticles is 12:1), injected into the atomizing nozzle (the feed rate is 3ml / min, and the pressure is 0.1MPa), and enters the reactor after being atomized by the atomizing gas. The water in the solution vaporizes at high temperature (for example, 250°C). Titanium tetrachloride and water molecules undergo a hydrolysis reaction at high temperature to generate titanium hydroxy complex nanoparticles. Titanium hydroxy complex nanoparticles on SiO 2 Aggregates around to reduce the surface energy, forming a titanium complex to coat SiO 2 Composite Microspheres of Nanoparticles. Calcined at 450°C in the air for 2 hours, and the SiO in the microspheres was 2 Etching to obtain a hierarchical porous structure TiO 2 Microspheres. The hierarchical porous st...

Embodiment 2

[0030] Dissolve titanium tetrachloride in deionized water (concentration is 0.1mol / L), SiO 2 Nanoparticles dispersed into the solution to form a suspension (titanium tetrachloride and SiO 2 The mass ratio of nanoparticles is 4:1), injected into the atomizing nozzle (the feed rate is 3ml / min, and the pressure is 0.1MPa), and enters the reactor after being atomized by the atomizing gas. The water in the solution vaporizes at high temperature (250 degrees). Titanium tetrachloride and water molecules undergo a hydrolysis reaction at high temperature to generate titanium hydroxy complex nanoparticles. Titanium hydroxy complex nanoparticles on SiO 2 Aggregates around to reduce the surface energy, forming a titanium complex to coat SiO 2 Composite Microspheres of Nanoparticles. Calcined at 450°C for 2 hours in the air, and the SiO 2 Etching to obtain a hierarchical porous structure TiO 2 . The particle diameter is 2-5μm, the mesopore diameter is 5-20nm, the macropore diameter ...

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Abstract

The invention relates to a titanium dioxide microsphere with a hierarchical porous structure, and a preparation method and application thereof. The titanium dioxide microsphere with the hierarchical porous structure has a diameter of 2 to 5 [mu]m, is formed by aggregation of nanometer titanium dioxide particles with diameters in a range of 5 to 20 nm, has a specific surface area of 40 to 130 m2 / g and includes both meso pores with pore diameters in a range of 5 to 20 nm and large pores with pore diameters in a range of 20 to 100 nm, wherein a ratio of the meso pores to the large pores is 1: 2.5 to 1: 3.5. The titanium dioxide microsphere with the hierarchical porous structure has a great specific surface area and good ultraviolet and visible light scattering performance and can improve the current density of a dye-sensitized solar cell when applied to a scattering layer of a dye-sensitized solar cell device, thereby improving the photoelectric conversion efficiency of the dye-sensitized solar cell.

Description

technical field [0001] The invention relates to a titanium dioxide microsphere with a hierarchical porous structure, a preparation method and an application thereof. The prepared titanium dioxide microspheres with a hierarchical porous structure have a high specific surface area and good ultraviolet and visible light scattering properties, which can be used in the scattering layer of a dye-sensitized solar cell device to increase the current of the dye-sensitized solar cell density, thereby increasing its photoelectric conversion efficiency. Background technique [0002] Titanium dioxide has been widely used in the fields of photocatalytic degradation of organic matter, photolysis of water to produce hydrogen, and dye-sensitized solar cells due to its advantages of high band gap, non-toxicity, stable performance, and low cost. s concern. In dye-sensitized solar cells, light-scattering materials are required to have low electron-hole recombination to improve electron transp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053H01G9/20
CPCY02E10/542
Inventor 胡彦杰李春忠刘鹏飞王彬淇江浩
Owner EAST CHINA UNIV OF SCI & TECH