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A high specific surface area noble metal/tio <base:sub> 2</base:sub> Preparation method of mesoporous microspheres

A technology with high specific surface area and precious metals, applied in the direction of metal/metal oxide/metal hydroxide catalysts, separation methods, chemical instruments and methods, etc., can solve the problems of small specific surface area of ​​samples, influence on photocatalytic activity, and many steps , to achieve the effects of easy control of dispersion performance, uniform shape and low preparation cost

Active Publication Date: 2017-06-30
吉林省格鲁环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is aimed at existing preparation noble metal / TiO 2 There are many steps in photocatalyst technology, and the technical problem of the small specific surface area of ​​the sample affects its photocatalytic activity. Provide a high specific surface area noble metal / TiO 2 Mesoporous microsphere photocatalyst and preparation method thereof

Method used

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  • A high specific surface area noble metal/tio &lt;base:sub&gt; 2&lt;/base:sub&gt; Preparation method of mesoporous microspheres
  • A high specific surface area noble metal/tio &lt;base:sub&gt; 2&lt;/base:sub&gt; Preparation method of mesoporous microspheres
  • A high specific surface area noble metal/tio &lt;base:sub&gt; 2&lt;/base:sub&gt; Preparation method of mesoporous microspheres

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Experimental program
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Effect test

Embodiment 1

[0020] 1. Dissolve titanium sulfate, PVP, HMT and silver nitrate in water to obtain a mixed solution, the concentration of titanium sulfate is 0.025mol L -1 、PVP 10g·L -1 ,HMT 0.025mol·L -1 , silver nitrate 0.4%;

[0021] 2. Transfer the above mixed solution to a high-pressure reactor lined with tetrafluoroethylene, and heat at a constant temperature of 180°C for 1 hour;

[0022] 3. After cooling the above reaction mixture, centrifuge, pour off the upper liquid, and wash repeatedly with water and ethanol to obtain Ag / TiO 2 Precipitate;

[0023] 4. Dry the precipitate obtained in step (3) in a 70°C drying oven to obtain Ag / TiO 2 Microspheres.

Embodiment 2

[0025] 1. Dissolve titanium sulfate, DMPA, HMT and chloroplatinic acid in water to obtain a mixed solution, the concentration of which is 0.025mol L of titanium sulfate -1 , DMPA 1.5g·L -1 ,HMT 0.025mol·L -1 , 0.8% chloroplatinic acid;

[0026] 2. Transfer the above mixed solution to a high-pressure reactor lined with tetrafluoroethylene, and heat at a constant temperature of 180°C for 1 hour;

[0027] 3. After cooling the above reaction mixture, centrifuge, pour off the upper liquid, and repeatedly wash with water and ethanol to obtain Pt / TiO 2 Precipitate;

[0028] 4. Dry the precipitate obtained in step (3) in a 70°C drying oven to obtain Pt / TiO 2 Microspheres.

Embodiment 3

[0030] 1. Dissolve titanium sulfate, DMPA, HMT and palladium chloride in water to obtain a mixed solution, the concentration of which is 0.05mol L of titanium sulfate -1 , DMPA 1.5g·L -1 ,HMT 0.05mol·L -1 , palladium chloride 0.04%;

[0031] 2. Transfer the above mixed solution to a high-pressure reactor lined with tetrafluoroethylene, and heat at a constant temperature of 160°C for 0.5h;

[0032] 3. After cooling the above reaction mixture, centrifuge, pour off the upper liquid, and wash repeatedly with water and ethanol to obtain Pd / TiO 2 Precipitate;

[0033] 4. Dry the precipitate obtained in step (3) in a 70°C drying oven to obtain Pd / TiO 2 Microspheres.

[0034] The energy spectrum analysis of the sample was carried out on the energy spectrometer attached to the JSM-6700F field emission scanning electron microscope. figure 1 For utilizing the Ag / TiO prepared by the method described in embodiment one of the present invention 2 The EDX energy spectrum of the microsp...

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Abstract

The invention discloses a preparation method of a high specific surface area precious metal / TiO2 mesoporous microsphere. The high specific surface area precious metal / TiO2 photocatalyst is prepared by a one-step hydrothermal reaction. The preparation method comprises dissolving titanium sulfate, a structure-directing agent, hexamethylenetetramine (HMT) and a precious metal salt in water to obtain a mixed solution, carrying out a hydrothermal reaction process in a high pressure reactor with a tetrafluoroethylene lining, then carrying out centrifugal washing on the product and carrying out drying to obtain the precious metal-loaded TiO2 microsphere. The preparation method has simple processes. The precious metal / TiO2 mesoporous microsphere has good dispersity, a high specific surface area, good adsorption effects on organic dye, good photocatalytic degradation performances, good absorption and good photocatalytic oxidation effects on harmful gas, and good photocatalytic activity of hydrogen production based on water photocatalytic decomposition.

Description

technical field [0001] The invention belongs to the field of photocatalyst materials and relates to a noble metal / TiO 2 Microspheres and methods for their preparation, in particular, to a high specific surface area noble metal / TiO 2 Preparation method of mesoporous microspheres. Background technique [0002] Energy and the environment are the two major themes of scientific research in this century. Solving the current increasingly serious energy shortage and environmental pollution problems is an urgent need to achieve sustainable development, improve people's quality of life and ensure national security. Studies have shown that semiconductor photocatalytic materials have great potential in solving energy and environmental problems. Due to its cheap, non-toxic, high catalytic activity and stability, TiO 2 Become the most studied semiconductor photocatalyst. At present, it has been widely used in the fields of deep purification of organic pollutants, sterilization and oth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J23/50B01J23/42B01J23/44B01J35/10B01D53/86B01D53/46C01B3/04C02F1/30C02F101/30
CPCY02E60/36
Inventor 王德宝宋彩霞朱义彪魏晓星张苗苗孙鹏飞王睿
Owner 吉林省格鲁环保科技有限公司