Double-metal loaded titanium dioxide nano porous ceramic catalyst as well as preparation method and application thereof

A ceramic catalyst, bimetallic nanotechnology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., to achieve good catalytic activity, uniform distribution of metal particles on the surface, excellent The effect of catalytic activity

Inactive Publication Date: 2018-06-22
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are no reports on the preparation of titanium dioxide nanoporous ceramic membranes based on titanate nanoribbons sintering, and the use of such ceramic membranes as carriers to support bimetallic nanoparticles.

Method used

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  • Double-metal loaded titanium dioxide nano porous ceramic catalyst as well as preparation method and application thereof
  • Double-metal loaded titanium dioxide nano porous ceramic catalyst as well as preparation method and application thereof
  • Double-metal loaded titanium dioxide nano porous ceramic catalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A method for preparing a titanium dioxide nanoporous ceramic catalyst loaded with gold-copper bimetallic nanoparticles, comprising the following steps:

[0036](1) Evenly disperse 2.5g of titanium dioxide in 500mL of sodium hydroxide solution with a concentration of 10mol / L, and put it in a constant temperature drying oven at 200°C for 72h to obtain sodium titanate nanobelts, and then put the sample into 1000mL of Ion exchange 24h in the hydrochloric acid solution of 0.1mol / L, obtain titanic acid nanobelt, the scanning electron microscope SEM photo of the obtained titanic acid nanobelt is as follows figure 1 as shown in a.

[0037] Take 0.04 g of the above-mentioned sodium titanate nano-belts, and perform pressure filtration to form a membrane under a pressure of 4 MPa. The obtained sample was put into a muffle furnace and calcined at 1000° C. for 2 hours to obtain a titanium dioxide nanoporous ceramic membrane.

[0038] (2) Add 10g / L of HAuCl to the circulation sleev...

Embodiment 2

[0051] A method for preparing a titanium dioxide nanoporous ceramic catalyst loaded with gold-copper bimetallic nanoparticles, comprising the following steps:

[0052] (1) Evenly disperse 2.5g of titanium dioxide in 500mL of sodium hydroxide solution with a concentration of 10mol / L, and put it in a constant temperature drying oven at 200°C for 72h to obtain sodium titanate nanobelts, and then put the sample into 1000mL of Ion exchange in 0.1mol / L hydrochloric acid solution for 24 hours to obtain titanate nanobelts.

[0053] Take 0.04 g of the above-mentioned sodium titanate nano-belts, and perform pressure filtration to form a membrane under a pressure of 2 MPa. The obtained sample was put into a muffle furnace and calcined at 800° C. for 4 hours to obtain a titanium dioxide nanoporous ceramic membrane.

[0054] (2) Add 10g / L of HAuCl to the circulation sleeve containing 40mL deionized water at the same time 4 Solution 87μL and 0.1mol / L Cu(CH 3 COO) 2 21 μL of the solution...

Embodiment 3

[0056] A method for preparing a titanium dioxide nanoporous ceramic catalyst loaded with gold-copper bimetallic nanoparticles, comprising the following steps:

[0057] (1) Evenly disperse 2.5g of titanium dioxide in 500mL of sodium hydroxide solution with a concentration of 10mol / L, and put it in a constant temperature drying oven at 200°C for 72h to obtain sodium titanate nanobelts, and then put the sample into 1000mL of Ion exchange in 0.1mol / L hydrochloric acid solution for 24 hours to obtain titanate nanobelts.

[0058] Take 0.04 g of the above-mentioned sodium titanate nano-belts, and perform pressure filtration to form a membrane at a pressure of 5 MPa. The obtained sample was put into a muffle furnace and calcined at 900° C. for 3 hours to obtain a titanium dioxide nanoporous ceramic membrane.

[0059] (2) Add 10g / L of HAuCl to the circulation casing containing 60mL of deionized water at the same time 4 Solution 87μL and 0.01mol / L Cu(CH 3 COO) 2 629 μL of the soluti...

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Abstract

The invention relates to a double-metal loaded titanium dioxide nano porous ceramic catalyst as well as a preparation method and application thereof. The catalyst takes a titanium dioxide nano porousceramic membrane as a carrier and gold and copper double-metal nanoparticles as an active component; the preparation method of the catalyst comprises the following steps: 1) carrying out press filtering and sintering on a titanic acid nano-ribbon to obtain the titanium dioxide nano porous ceramic membrane; 2) loading the gold and copper double-metal nanoparticles on the ceramic membrane by adopting a one-step deposition-precipitation method; reducing through H2 to prepare the gold and copper double-metal loaded titanium dioxide nano porous ceramic catalyst. The double-metal loaded titanium dioxide nano porous ceramic catalyst prepared by the preparation method has the advantages that catalytic active metal particles are uniformly distributed and the component composition is quantified andcontrollable; the catalyst has a uniform porous structure and high porosity and has the advantages of high catalytic activity, selectivity and stability; the catalyst is easy to recycle and repeatedlyused and is suitable for large-scale industrial application.

Description

technical field [0001] The invention relates to a titanium dioxide nanoporous ceramic catalyst loaded with bimetals and a preparation method thereof, as well as the application of the catalyst in the selective oxidation reaction of benzyl alcohol, methanol and other alcohols, belonging to the technical field of catalysts. Background technique [0002] Bimetallic nanostructure catalysts have better catalytic activity, selectivity and stability than monometallic catalysts, and are currently one of the research hotspots in the field of catalytic material synthesis. In order to further improve the catalytic activity and stability of bimetallic nanomaterials, it is usually necessary to immobilize them on the surface of catalyst supports. Chinese patent (CN104525220A) introduces a kind of Au-CuO / TiO 2 Microsphere catalyst whose support is sea urchin-like TiO prepared by hydrothermal method 2 Microspheres, suitable for CO removal from air under visible light and CO removal under ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/10B01J37/08B01J37/03B01J37/18C07C45/38C07C47/04C07C47/54B82Y30/00B82Y40/00C04B35/46C04B38/00C04B41/88
CPCB01J23/8926B01J35/1066B01J37/035B01J37/086B01J37/088B01J37/18B82Y30/00B82Y40/00C04B35/46C04B38/00C04B41/5127C04B41/88C04B2235/6562C04B2235/6567C04B2235/95C07C45/38C07C47/54C07C47/04C04B38/0054C04B41/5116C04B41/4535C04B41/4558Y02P20/584
Inventor 许效红张秀梅
Owner SHANDONG UNIV
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