Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Supported noble metal catalyst based on carrier morphology modification as well as preparation and application

A precious metal catalyst, supported technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problem of low catalytic activity, long-term working stability and moisture resistance It can effectively catalyze the decomposition of formaldehyde, optimize the intrinsic activity and the number of active sites, and easily obtain the raw materials.

Active Publication Date: 2020-07-10
SOUTH CHINA UNIV OF TECH
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, noble metal catalysts still generally have shortcomings such as low catalytic activity for catalytic oxidation of formaldehyde, long-term work stability and poor moisture resistance. Key Problems to be Solved in the Process of Practical Application of Oxidation Technology

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Supported noble metal catalyst based on carrier morphology modification as well as preparation and application
  • Supported noble metal catalyst based on carrier morphology modification as well as preparation and application
  • Supported noble metal catalyst based on carrier morphology modification as well as preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Catalyst preparation:

[0041] Fe 2 o 3 Synthesis of -HO: 1.0mmol FeCl 3 ·6H 2 O and 10.5mmol NaF were dissolved in 30mL ultrapure water to form a transparent solution, and 0.12mL NH 3 ·H 2 O (12%) was added to the above solution to continue sonication for 10 minutes. Subsequently, the above-mentioned suspension was placed in a hydrothermal kettle with a volume of 50 mL, and after being treated at a constant temperature of 180 °C for 24 hours, it was naturally cooled to room temperature. Carry out vacuum drying 6 hours; Make target carrier Fe 2 o 3 -HO.

[0042] Pt / Fe 2 o 3 Synthesis of -HO: 100 mg of Fe synthesized above 2 o 3 -HO was dispersed in 10 mL of ultrapure water, and 0.27 mL of H 2 PtCl 6 (19.3mM) solution was continuously stirred for 30 minutes; subsequently, 1.70mL of NaBH 4 (0.1M) and NaOH (0.1M) mixed reducing agent was added to the suspension and stirred for 2 hours. The prepared sample was fully cleaned and then vacuum-dried at 60°C ...

Embodiment 2

[0053] (1) Catalyst preparation:

[0054] In the synthesis method of the present embodiment, only FeCl 3 ·6H 2 O is replaced by Fe(NO 3 ) 3 9H 2 O and H 2 PtCl 6 Replaced with HAuCl 4 , all the other preparation conditions are consistent with Example 1.

[0055] (2) Phase / structural characterization of the catalyst:

[0056] The obtained hydrothermal state sample Fe of the present embodiment 2 o 3 -HO and Au loaded sample Au / Fe 2 o 3 X-ray diffraction of -HO as Figure 9 shown. According to XRD analysis ( Figure 9 ), the synthesized hydrothermal samples and Au-loaded samples are both α-Fe 2 o 3 crystal phase.

[0057] Transmission electron microscope observation ( Figure 10 In a) it is found that the structure of the target catalyst is consistent with that of Example 1, which is octadecahedral Fe with a hollow structure 2 o 3 Supported Au catalyst (Au / Fe 2 o 3 -HO), at the same time, it was found that there were a large number of newly generated nanopar...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Sizeaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of catalytic materials, and discloses a supported noble metal catalyst based on carrier morphology modification as well as preparation and application thereof. The catalyst is composed of a noble metal active phase and a metal oxide carrier phase, and the noble metal active phase is dispersed and distributed on the surface of the metal oxide carrier phase in the form of fine nanoparticles. A noble metal active phase and an oxide carrier are combined to construct a synergistic catalytic active site. Meanwhile, the octadecahedron structure of the carrier improves the dispersity of the noble metal on the surface of the oxide, so that the noble metal is dispersed and distributed on the surface of the oxide carrier phase in the form of fine nanoparticles. Besides, oxygen vacancies introduced by partial reduction of the carrier oxide are beneficial to improving the adsorption and dissociation of the catalyst to water molecules to generate hydroxylspecies, and a large number of hydroxyl adsorption sites and reactive active hydroxyl species are provided. Therefore, the activation of the catalyst to oxygen molecules and the adsorption of the catalyst to formaldehyde are synergistically improved. The comprehensive catalytic performance is close to that of the currently reported corresponding supported noble metal catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, and in particular relates to a supported noble metal catalyst based on carrier morphology modification and its preparation and application. Background technique [0002] Indoor air pollution has become an environmental problem that is widely concerned by countries all over the world. Formaldehyde (HCHO), as a common air pollutant that mainly comes from various indoor decoration materials, has been identified as a carcinogenic and teratogenic substance by the World Health Organization. Its effective treatment has attracted the general attention of researchers at home and abroad. Among various air purification technologies, catalytic oxidation is considered to be a safe and efficient formaldehyde removal technology. This technology can catalytically oxidize formaldehyde to carbon dioxide (CO2) under relatively mild conditions. 2 ) and water (H 2 O), has the advantages of low energy c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01J23/89B01J37/10B01J37/16B01D53/86B01D53/72
CPCB01J23/8906B01J37/10B01J37/16B01D53/8668B01D2257/704B01J35/393B01J35/23
Inventor 王平陈木华
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com