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Preparation method of (001)surface exposure-three-dimensional laminated structure TiO2 catalyst

A technology of laminated structure and catalyst, applied in physical/chemical process catalysts, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problem of low utilization rate of visible light, easy recombination of photogenerated electrons and holes, and nanoscale scale. It is easy to agglomerate and deactivate and other problems, so as to enhance the photoelectric effect, increase the specific surface area, and promote the photocatalytic activity.

Active Publication Date: 2020-04-24
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano-TiO 2 The crystal grains have the characteristics of low utilization rate of visible light, easy recombination of photogenerated electrons and holes, and easy aggregation and deactivation at the nanoscale

Method used

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  • Preparation method of (001)surface exposure-three-dimensional laminated structure TiO2 catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 Monolithic thickness of 30nm exposed (001) plane - three-dimensional laminated structure TiO 2 Catalyst preparation

[0019] (1) Preparation of titanium tetrafluoride solution

[0020] Dissolve 4.956g of titanium tetrafluoride in 1L of hydrochloric acid solution with a concentration of 2 mol / L at a temperature of 15°C-35°C to obtain a titanium tetrafluoride solution with a concentration of 0.04mol / L at pH=2;

[0021] (2) TiO 2 Preparation of crystal nuclei

[0022] Put 50 ml of 0.04 mol / L titanium tetrafluoride solution and 10 ml of isobutanol in a beaker for 1 hour, stir it magnetically for 1 hour, mix well and add it to a 100 ml polytetrafluoroethylene-lined stainless steel autoclave; place it in a muffle Keep the temperature in the furnace at 180°C for 6 hours, cool, precipitate, and filter to obtain white solid particles, wash with distilled water for 3 times, centrifuge, and dry to obtain sample X;

[0023] (3) (001) surface exposed - three-dimensiona...

Embodiment 2

[0026] Example 2 (001) surface exposure with a monolithic thickness of 60nm-three-dimensional stacked structure TiO 2 Catalyst preparation

[0027] (1) Preparation of titanium tetrafluoride solution

[0028] Dissolve 4.956g of titanium tetrafluoride in 1L of hydrochloric acid solution with a concentration of 2 mol / L at a temperature of 15°C-35°C to obtain a titanium tetrafluoride solution with a concentration of 0.04mol / L at pH=2;

[0029] (2) TiO 2 Preparation of crystal nuclei

[0030] Put 50ml of 0.04 mol / L titanium tetrafluoride solution and 20ml of isobutanol in a beaker and magnetically stir for 1h, mix well and add to a 100ml polytetrafluoroethylene-lined stainless steel autoclave; place in a muffle Keep the temperature in the furnace at 180°C for 6 hours, cool, precipitate, and filter to obtain white solid particles, wash with distilled water for 3 times, centrifuge, and dry to obtain sample X;

[0031] (3) (001) surface exposed - three-dimensional laminated struct...

Embodiment 3

[0034] Example 3 Exposed (001) plane with a monolithic thickness of 90nm - three-dimensional laminated structure TiO 2 Catalyst preparation

[0035] (1) Preparation of titanium tetrafluoride solution

[0036] Dissolve 4.956g of titanium tetrafluoride in 1L of hydrochloric acid solution with a concentration of 2 mol / L at a temperature of 15°C-35°C to obtain a titanium tetrafluoride solution with a concentration of 0.04mol / L at pH=2;

[0037] (2) TiO 2 Preparation of crystal nuclei

[0038] Put 60ml of 0.04 mol / L titanium tetrafluoride solution and 10 ml of isobutanol in a beaker and stir it magnetically for 1 hour. After mixing thoroughly, add it to a 100 ml polytetrafluoroethylene-lined stainless steel autoclave; place it in a muffle Keep the temperature in the furnace at 180°C for 6 hours, cool, precipitate, and filter to obtain white solid particles, wash with distilled water for 3 times, centrifuge, and dry to obtain sample X;

[0039] (3) (001) surface exposed - three-...

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Abstract

The invention provides a (001)surface exposure-three-dimensional laminated structure TiO2 catalyst. A preparation method of the (001)surface exposure-three-dimensional laminated structure TiO2 catalyst comprises the following steps: preparing a titanium tetrafluoride solution, preparing a TiO2 crystal nucleus, and preparing the (001)surface exposure-three-dimensional laminated structure TiO2 catalyst. According to the invention, titanium tetrafluoride is used as a titanium source; isobutanol, isopropanol and hydrofluoric acid are used as structure control agents, a two-step hydrothermal methodis adopted to prepare the (001)surface exposure-three-dimensional laminated structure TiO2 catalyst, and the lamellar structure of the catalyst not only effectively increases the exposure proportionand photocatalytic active sites of a high-activity (001) crystal face, but also increases the specific surface area of the material. Meanwhile, the three-dimensional laminated structure can effectively promote separation of photo-induced electrons and holes, enhance the photoelectric effect and promote improvement of photocatalytic activity.

Description

technical field [0001] The invention relates to inorganic functional materials and fine chemical preparation technology, and is a (001) surface exposed-three-dimensional lamination structure TiO 2 Catalyst preparation method. Background technique [0002] As we all know, many inorganic semiconductor materials have many excellent physical and chemical properties. Due to their extensive scientific and technological importance, they have been widely studied and applied in environmental protection, dye-sensitized solar cells, photoelectric conversion and water splitting. fields such as hydrogen. Among many inorganic semiconductor materials, TiO 2 Because of its moderate band gap position, simple synthesis process, harmless to the environment and human body, stable chemical properties, light resistance, acid and alkali corrosion resistance, etc., it has been studied in depth for a long time, and has been widely used in photocatalysis, solar cells, water splitting and sensor des...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06C01G23/053C01G23/047
CPCB01J21/063C01G23/053C01G23/08C01P2004/61C01P2006/12B01J35/39Y02E60/36
Inventor 董业硕
Owner QINGDAO TECHNOLOGICAL UNIVERSITY