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Preparation method and application of titanium dioxide nanocomposite particles loaded with pt-au alloy

A nanocomposite, pt-au technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as limiting the development of catalytic materials , to achieve the effect of preventing sintering and agglomeration and improving the catalytic oxidation performance of CO

Active Publication Date: 2019-04-19
苏州羿白环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The weak interfacial interaction between the noble metal and the support and the sintering and agglomeration of noble metal particles caused by the later calcination process largely limit the development of such catalytic materials.

Method used

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  • Preparation method and application of titanium dioxide nanocomposite particles loaded with pt-au alloy
  • Preparation method and application of titanium dioxide nanocomposite particles loaded with pt-au alloy
  • Preparation method and application of titanium dioxide nanocomposite particles loaded with pt-au alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] 1%Au / TiO 2 Preparation of composite nanoparticles and CO oxidation performance:

[0033] (1) Preparation of precursor solution: Weigh 0.05mol tetrabutyl titanate and dissolve it in 70ml xylene, then add 20.8ml 0.02mol / L chloroauric acid alcohol solution, then add 9.2ml ethanol, the xylene / L The volume ratio of ethanol was 7 / 3, and the mixed solution was sonicated for 20 minutes to obtain a precursor solution for use.

[0034] (2) Use a syringe pump to send the precursor solution to the reactor at a certain speed of 5mL / min through the atomization burner to form fine atomized droplets, and the shear pressure is 0.12MPa. 2 / O 2 (H 2 Flow 0.1m 3 / h,O 2 Flow 1.0m 3 / h) Combustion, pyrolysis, oxidation and other reactions occur under the assistance of a diffusion flame. After leaving the flame, the mixed-phase nano-TiO is collected by a vacuum pump-assisted glass fiber filter membrane. 2 Nanocomposite particles loaded with Au alloy, figure 1 XRD curves show that the ...

Embodiment 2

[0037] 0.75% Au-0.25% Pt / TiO 2 Preparation of composite nanoparticles and CO oxidation performance:

[0038] (1) Preparation of precursor solution: Weigh 0.05mol tetrabutyl titanate and butyl titanate as combined titanium source (ratio 2:1) and dissolve in 70ml xylene, then add 15.6ml 0.02mol / L chlorine Auric acid alcohol solution and 6.25ml 0.02mol / L chloroplatinic acid alcohol solution, then add 8.2ml ethanol, the xylene / ethanol volume ratio in the system is about 7 / 3, after the mixed solution is ultrasonicated for 20min, the precursor solution is obtained. use.

[0039] (2) Use a syringe pump to send the precursor solution to the reactor at a certain speed of 3mL / min through the atomization burner to form fine atomized droplets, and the shear pressure is 0.15MPa. 2 / O 2 (H 2 Flow 0.15m 3 / h,O 2 Flow 1.0m 3 / h) Combustion, pyrolysis, oxidation and other reactions occur under the assistance of a diffusion flame. After leaving the flame, the mixed-phase nano-TiO is coll...

Embodiment 3

[0042] 0.25% Au-0.75% Pt / TiO 2 Preparation of composite nanoparticles and CO oxidation performance:

[0043] (1) Preparation of precursor solution: Weigh 0.05mol butyl titanate as a titanium source and dissolve it in 70ml xylene, then add 5.3ml 0.02mol / L chloroauric acid alcohol solution and 18.8ml 0.02mol / L platinum chloride Acid-alcohol solution, then add 5.9ml of ethanol, the xylene / ethanol volume ratio in the system is about 7 / 3, and the mixed solution is ultrasonicated for 20 minutes to obtain a precursor solution, which is ready for use.

[0044] (2) Use a syringe pump to send the precursor solution to the reactor at a certain speed of 5mL / min through the atomization burner to form fine atomized droplets, and the shear pressure is 0.2MPa. 2 / O 2 (H 2 Flow 0.1m 3 / h,O 2 Flow 1.0m 3 / h) Combustion, pyrolysis, oxidation and other reactions occur under the assistance of a diffusion flame. After leaving the flame, the mixed-phase nano-TiO is collected by a vacuum pump-a...

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Abstract

The invention relates to a preparation method of Pt-Au alloy supported TiO2 composite nanoparticles. Precious metal Pt-Au with catalysis activity is supported on the surface of high temperature reaction formed TiO2 in an in-situ manner in an alloy form, and has strong interface interaction with TiO2. The Pt-Au alloy supported TiO2 composite nanoparticles can be rapidly and serially prepared through adopting a one-step flame spray combustion technology; and alloy type Pt-Au bimetal particles are supported on the high-thermal stability TiO2 carrier generated through a high temperature flame reaction under strong metal-oxide interface interaction, and the unique bimetal alloy structure and carrier interface action synergistic coupling makes the above material have excellent application performances in catalytic oxidation of CO.

Description

technical field [0001] The present invention relates to the field of new materials for environmental treatment, in particular to a CO oxidation catalyst material and its preparation method and application, the core of which is to rapidly prepare loaded Pt-Au precious metal alloy TiO by using one-step spray combustion technology 2 Nanocomposite particles, used in the catalytic oxidation of CO, exhibit good catalytic performance. Background technique [0002] As a highly efficient heterogeneous catalyst material, noble metal nanoparticles supported by inorganic oxide supports are widely used in industrial catalytic reactions such as catalytic conversion of automobile exhaust, fuel cells, organic oxidation catalytic synthesis, photocatalytic reactions and other fields. With the development of nanotechnology and the great demand for environmental governance, low-temperature CO oxidation can effectively convert difficult-to-use CO into relatively less polluting CO. 2 , among whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/66B82Y30/00B01D53/86B01D53/62
CPCB01D53/864B01J21/063B01J23/66B82Y30/00Y02A50/20
Inventor 胡彦杰李春忠徐南李文阁路力
Owner 苏州羿白环保科技有限公司
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