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Precious metal loaded TiO2 nanorod photocatalyst preparation method

A photocatalyst, precious metal technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of complex preparation steps and high production costs, and achieve the preparation process Simple, low cost and high photocatalytic activity

Active Publication Date: 2015-09-23
四川发展环境科学技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is aimed at existing preparation noble metal / TiO 2 In the nanorod photocatalyst technology, the preparation steps are complicated and the production cost is high, and a kind of TiO loaded with precious metals is provided. 2 Preparation method of nanorod photocatalyst

Method used

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  • Precious metal loaded TiO2 nanorod photocatalyst preparation method

Examples

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Effect test

Embodiment 1

[0017] 1. Dissolve titanium sulfate, silver nitrate, hexamethylenetetramine, and sodium hydroxide in water and stir evenly to obtain a mixed solution with a concentration of 0.025mol L of titanium sulfate -1 , silver nitrate 1.0% (molar ratio to titanium sulfate), hexamethylenetetramine 0.025mol L -1 , sodium hydroxide 10mol L -1 ;

[0018] 2. Transfer the above mixed solution to a high-pressure reactor lined with tetrafluoroethylene, and heat at a constant temperature of 180°C for 24 hours;

[0019] 3. After cooling the above reaction mixture, centrifuge, pour off the upper liquid, soak the obtained precipitate in 0.02mol / L sulfuric acid solution for 2h, centrifuge, and wash with water to obtain a silver-loaded precipitate;

[0020] 4. Put the precipitate obtained in step (3) into a drying oven at 60°C and dry it, then bake it at 700°C for 0.5h to obtain silver-loaded TiO 2 Nano stave.

Embodiment 2

[0022] 1. Dissolve titanium sulfate, chloroplatinic acid, hexamethylenetetramine, and sodium hydroxide in water and stir evenly to obtain a mixed solution with a concentration of 0.05mol L of titanium sulfate -1 , chloroplatinic acid 0.05%, hexamethylenetetramine 0.05mol L -1 , sodium hydroxide 8mol L -1 ;

[0023] 2. Transfer the above mixed solution to a high-pressure reactor lined with tetrafluoroethylene, and heat at a constant temperature of 180°C for 18 hours;

[0024] 3. After cooling the above reaction mixture, centrifuge, pour off the upper liquid, soak the obtained precipitate in 0.02mol / L sulfuric acid solution for 1h, centrifuge, and wash with water to obtain a platinum-loaded precipitate;

[0025] 4. Put the precipitate obtained in step (3) into a drying oven at 60°C and dry it, then bake it at 600°C for 1 hour to obtain platinum-supported TiO 2 Nano stave.

Embodiment 3

[0027] 1. Dissolve titanium sulfate, palladium chloride, hexamethylenetetramine, and sodium hydroxide in water and stir evenly to obtain a mixed solution with a concentration of 0.1mol L of titanium sulfate -1 , palladium chloride 0.1%, hexamethylenetetramine 0.1mol L -1 , sodium hydroxide 12mol L -1 ;

[0028] 2. Transfer the above mixed solution to a high-pressure reactor lined with tetrafluoroethylene, and heat at a constant temperature of 200°C for 8 hours;

[0029] 3. After cooling the above reaction mixture, centrifuge, pour off the upper liquid, soak the obtained precipitate in 0.04mol / L sulfuric acid solution for 1h, centrifuge, and wash with water to obtain a palladium-loaded precipitate;

[0030] 4. Put the precipitate obtained in step (3) into a 60°C drying oven for drying, and then bake it at 600°C for 1 hour to obtain palladium-supported TiO 2 Nano stave.

[0031] The energy spectrum analysis was carried out on the energy spectrometer attached to the JSM-6700F...

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Abstract

The invention discloses a precious metal loaded TiO2 nanorod photocatalyst preparation method. A precursor of a precious metal loaded TiO2 nanorod is obtained by one-step hydrothermal reaction of inorganic titanium sulfate and precious metal salt. The method includes: dissolving the titanium sulfate, the precious metal salt, hexamethylene tetramine and sodium hydroxide into water, stirring uniformly to obtain mixed solution, carrying out hydrothermal reaction in a high-pressure reactor with a tetrafluoroethylene liner to obtain the precious metal loaded TiO2 precursor, soaking in dilute sulphuric acid and calcining to obtain the precious metal loaded TiO2 nanorod. The precious metal loaded TiO2 nanorod photocatalyst preparation method has the advantage of simplicity in operation and high dispersity and excellent photocatalytic activity of precious metal / TiO2 nanorod photocatalyst.

Description

technical field [0001] The invention belongs to the field of photocatalyst materials and relates to a noble metal / TiO 2 The preparation method of nanorods, specifically, involves a noble metal loaded TiO 2 Preparation method of nanorod photocatalyst. Background technique [0002] TiO 2 As one of the most important semiconductor photocatalysts, it has been widely used in environmental protection fields such as deep purification of organic pollutants and sterilization, as well as new energy fields such as photocatalytic water splitting for hydrogen production and dye-sensitized solar cells. But TiO 2 It is a wide bandgap semiconductor material, which can only absorb and utilize ultraviolet light with a wavelength less than 386nm in sunlight, and has a low utilization rate of sunlight. And TiO 2 The electron-hole pairs generated by the photoexcitation of the photocatalyst recombine faster, resulting in TiO 2 The actual photocatalytic effect is greatly reduced, which limit...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J23/44B01J23/50B82Y30/00
Inventor 王德宝宋彩霞牟红宇赵泽宇袁金钟刘小雪
Owner 四川发展环境科学技术研究院有限公司
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