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Loaded material catalyst with network structures
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A network structure, load-type technology, applied in the field of chemistry, can solve the problem of low space utilization
Active Publication Date: 2017-07-25
SUZHOU SMART ADVANCED COATING TECH CO LTD
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[0005] The technical problem to be solved by the present invention is mainly aimed at the low space utilization rate in the actual use of the current air pollutant catalyst, and provides a design idea of an integrated hierarchical network structure loaded catalytic material, thereby improving the effective utilization of the space structure and further Realize efficient catalysis
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Embodiment 1
[0044] Embodiment 1 Direct growth method prepares the loaded material with network structure
[0045] After the carbon fiber cloth is cleaned and dried, it is immersed in a thermosetting phenolic resin (60% solid content, ethanolsolvent) for 30 minutes, taken out and cured and dried at 160°C. This step can be repeated several times, carbonized at 800°C for 2 hours under the protection of nitrogen, and the mass fraction of activated carbon is loaded on the surface of the carbon fiber cloth About 10%, at this time, the surface of the carbon fiber cloth is covered with an activated carbon material with a relatively developed microporous structure.
[0046] Immerse the loaded activated carbon fiber cloth in the titaniumoxidesol, the titaniumoxidesol uses ethanol as the solvent, and the solid content is 20%. After soaking for 30 minutes, take it out and dry it at 80°C. This step can be repeated many times. The mass fraction of titanium loading is about 10% of the mass of activ...
Embodiment 2
[0047] The preparation of embodiment 2 catalyst
[0048] Immerse the loaded titanium oxide fiber cloth prepared in Example 1 into an aqueous solution of platinumnitrate (platinum content 50g / L), take it out and dry it at 90°C. This step can be repeated several times, and treat it at 500°C for 2h under the protection of nitrogen to obtain a The structure is a supported material catalyst, wherein the platinum content is about 1% by mass of titanium oxide.
[0049] Catalytic material testing:
[0050] Carry out catalytic reaction with the catalyst of embodiment 2, take air as carrier gas, formaldehyde content 100ppm, relative humidity 50%, space velocity 2000h -1 , and finally determined that the conversion rate of formaldehyde was close to 100% at room temperature.
Embodiment 3
[0053] Example 3 Preparation of a loaded material with a network structure by dipping-drying method
[0054] Mix the nano-aluminapowder with deionized water and stir to prepare a suspension. Immerse the foam ceramic plate for 30 minutes, take it out and dry it at 120°C. This step can be repeated several times. Treat it at 300°C for 2 hours. The mass fraction of alumina loaded is about It is 10% of the mass of the ceramic plate. At this time, the surface of the ceramic material is covered with alumina with a relatively developed microporous structure;
[0055] Loaded alumina foam ceramic plate is immersed in ceriumnitrate-ureamixed solution (ceriumnitrate 50mmol / L, urea 100mmol / L), heated at 90°C for 2h, taken out, washed and dried at 120°C, this step can be repeated several times, 500°C for 2h, The obtained ceriumoxide-loaded ceramic plate with network structure, wherein the mass fraction of cerium oxide loaded is about 10% of the mass of alumina, at this time, cerium oxi...
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Abstract
The invention discloses a loaded material with network structures and a catalyst. A method for preparing the loaded material with the classified network structures includes steps of gradually loading target materials on the surfaces of three-dimensional porous materials by the aid of 'dipping-drying' processes and / or direct growing processes, forming the classified network structures on the surfaces of supports by loaded carrier materials, allowing pore canals to be gradually enlarged from the inside to the outside, mainly forming micropores and mesopores in the inner sides of the pore canals and mainly forming macropores in the outer sides of the pore canals; re-depositing active materials on the surfaces of the loaded carrier materials for catalyzing formaldehyde at the room temperature. The three-dimensional porous materials are used as the supports. The loaded material and the catalyst have the advantages that space structures can be effectively utilized by the catalyst, and the formaldehyde can be efficiently catalyzed.
Description
technical field [0001] The invention belongs to the technical field of chemistry, and in particular relates to a catalyst and a preparation method thereof, in particular to an integrated hierarchical network structure supported material catalyst. Background technique [0002] With the development of modern industry, air pollution has also increased. People use catalytic oxidation technology to convert indoor airpollution gases or toxic gases into harmless carbon dioxide and / or water, and prepare catalysts by loading metals or metal oxides on specific supports through various preparation methods. In recent years, people try to match the noble metalactive components with the carrier by adjusting the preparation method and preparation conditions of the catalyst, so as to improve the catalytic efficiency of the catalyst, realize catalytic oxidation at low temperature, and eliminate low-concentration pollution in the air gas or toxic gas. [0003] Formaldehyde is a common ind...
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