Controllable nanocrystalline TiO2 particle, and preparation method and use thereof

A crystalline and particle technology, applied in nanotechnology, nanotechnology, sustainable manufacturing/processing, etc., can solve the problems of small scale, low production efficiency, and inability to prepare nanocrystalline TiO2 particles as desired

Active Publication Date: 2016-02-24
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 2) Most of the various methods have shortcomings such as small scale, high production cost, and low production efficiency, making it difficult to realize large-scale industrial production
[0006] Therefore, it is impossible to prepare nanocrystalline TiO with different shapes, sizes, crystal forms and particle size distributions according to the existing technology. 2 Particles, the inventor proposed this method

Method used

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  • Controllable nanocrystalline TiO2 particle, and preparation method and use thereof
  • Controllable nanocrystalline TiO2 particle, and preparation method and use thereof
  • Controllable nanocrystalline TiO2 particle, and preparation method and use thereof

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preparation example Construction

[0047] A controllable nanocrystalline TiO 2 The preparation method of particles includes the following steps:

[0048] a. Add tetraisopropyl titanate to the acidic solution, and then stir and react to obtain a titanium sol;

[0049] b. Hydrothermal reaction of titanium sol;

[0050] c. After the hydrothermal reaction is over, remove the liquid phase, wash to neutral, and dry to obtain nanocrystalline TiO 2 Particles.

[0051] The above-mentioned controllable nanocrystalline TiO 2 In step a of the particle preparation method, in order to reduce the speed of the hydrolysis reaction, thereby controlling the consistency of the product particle size distribution, particle size and other factors, the stirring reaction temperature is preferably 0-4°C.

[0052] The above-mentioned controllable nanocrystalline TiO 2 In step a of the particle preparation method, in order to reduce the hydrolysis rate of tetraisopropyl titanate, the tetraisopropyl titanate is diluted with alcohol and then added to...

Embodiment 1

[0072] Nanocrystalline TiO 2 Preparation of particles: Weigh 2.27g of tetraisopropyl titanate as solvent A, add 2mL of concentrated nitric acid into 76mL of deionized water and mix uniformly to form solution B, place solution B in an ice water bath, and dilute the solvent A to 0.5 mL / min was added dropwise to solution B and stirred vigorously for 2 hours to form a sol. The sol was transferred to a hydrothermal kettle lined with para-polyphenol and heated to 140°C at a temperature increase rate of 1°C / min, and then taken out after 6 hours. The hydrothermal kettle was naturally cooled to room temperature, the supernatant in the lining was skimmed, washed with deionized water under ultrasonic conditions, and centrifuged to remove organic matter and excess acid. Repeated washing to pH 7.0, using absolute ethanol Exchange most of the water, transfer to a rotary evaporator to quickly remove most of the water and ethanol, and finally place it in a vacuum drying oven at 90°C for 2 hours...

Embodiment 2

[0080] Nanocrystalline TiO 2 Preparation of particles: Weigh 2.27 g of tetraisopropyl titanate as solvent A, add 10 mL of concentrated nitric acid into 68 mL of deionized water and mix uniformly to form solution B, place solution B in an ice water bath, and dilute the solvent A to 0.5 mL / min was added dropwise to solution B and stirred vigorously for 2 hours to form a sol. The sol was transferred to a hydrothermal kettle lined with para-polyphenol and heated to 140°C at a temperature increase rate of 1°C / min, and then taken out after 6 hours. The hydrothermal kettle was naturally cooled to room temperature, the supernatant in the lining was skimmed, washed with deionized water under ultrasonic conditions and centrifuged to remove organic matter and excess acid. Repeated washing to pH 7.0, using absolute ethanol Exchange most of the water, transfer to a rotary evaporator to quickly remove most of the water and ethanol, and finally place it in a vacuum drying oven at 90°C for 2 ho...

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Abstract

The invention belongs to the technical field of material preparation processing, and concretely relates to a controllable nanocrystalline TiO2 particle, and a preparation method and a use thereof. A technical problem to be solved in the invention is to provide the preparation method of the controllable nanocrystalline TiO2 particle. The method comprises the following steps: 1, adding tetraisopropyl titanate into an acidic solution, and stirring and reacting to prepare a titanium sol; 2, carrying out a hydrothermal reaction on the titanium sol; and 3, removing the above obtained liquid phase after the hydrothermal reaction ends, washing until neutrality, and drying to prepare the nanocrystalline TiO2 particle. TiO2 particles with different morphologies, sizes and crystal forms can be prepared through the method as needed.

Description

Technical field [0001] The invention belongs to the technical field of material preparation and processing, and specifically relates to a controllable nanocrystalline TiO 2 Granules and preparation methods and applications thereof. Background technique [0002] Dye-sensitized Solar Cells (DSSCs) have become one of the hot spots of new energy product technology research due to their low cost, simple preparation process, and high photoelectric conversion efficiency. A typical DSSCs component consists of a "sandwich" structure composed of a working electrode, a counter electrode and an electrolyte. The working electrode is made of a metal oxide semiconductor that adsorbs dyes and is supported on a transparent conductive substrate. The metal oxide semiconductor mainly consists of titanium dioxide (TiO 2 ), zinc oxide (ZnO), tungsten trioxide (WO 3 ), etc., platinum (Pt) film is supported on a transparent conductive substrate as the counter electrode, and the electrolyte solution diffu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053H01G9/20H01G9/04B82Y30/00
CPCC01G23/053C01P2002/72C01P2004/03C01P2004/30C01P2004/32C01P2004/64H01G9/20H01G9/2031Y02E10/542Y02P70/50
Inventor 崔旭梅郭俊雄蓝德均陈孝娥左承阳王军曾志勇丁虎标张雪峰
Owner PANZHIHUA UNIV
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