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Carbon-based metal catalyst and preparation method and application thereof

A metal catalyst and metal-based technology, which is applied in the field of carbon-based metal catalysts and their preparation, can solve the problems of low loading, low dispersion, and inability to remove gaseous benzene pollutants, etc., and achieve high loading and simple preparation process , easy to operate and promote the effect

Pending Publication Date: 2019-01-15
KUANG CHI INST OF ADVANCED TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there is a method for preparing metal catalysts in the prior art. The prepared Ru / H-β catalyst exhibits excellent Fischer-Tropsch reaction activity, which is mainly aimed at the selectivity of C5-C11 liquid products, but its dispersion is not good. High and low loading, and cannot effectively remove gaseous benzene pollutants

Method used

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  • Carbon-based metal catalyst and preparation method and application thereof

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preparation example Construction

[0024] The preparation method of the carbon-based metal catalyst provided by the invention comprises the following steps:

[0025] Such as figure 1 Shown in step S101: preparing a carbon-based support. In this step, the carbon-based carrier can be prepared by freeze-drying, supercritical drying or spray-drying. Optionally, in the above-mentioned preparation method, the carbon source used is graphene oxide and butyl titanate, iso A mixed solution of one or both of aluminum propoxide and ethyl tetrasilicate, or graphene oxide. Optionally, in the above-mentioned preparation method, the solvent used is water, ethanol, isopropanol, tertiary One or more combinations of butanols. In the above preparation method, the specific surface area of ​​the prepared carbon-based support is 1500-3000m 2 / g, porosity 70-90%, preferably, the specific surface area of ​​the prepared carbon-based carrier is 2100-3000m 2 / g, porosity 85-90%. In this step, the preparation of carbon-based materials...

Embodiment 1

[0030] The carbon-based carrier is prepared by freeze-drying method, wherein graphene oxide is used as the carbon source, water is the solvent, and the specific surface area of ​​the prepared carbon-based carrier graphene is 2300m 2 / g, the porosity is 80%. Platinum nitrate (Pt(NO 3 ) 2 ) as the metal precursor and the chelating agent polyvinylpyrrolidone are uniformly mixed to form a mixed solution. Add the prepared graphene to the mixed solution, and dry it at a temperature of 85°C with a rotary evaporator. During the drying process, Pt(NO 3 ) 2 , polyvinylpyrrolidone and graphene carrier are fully combined, and then roasted at a temperature of 500 ° C. After high-temperature roasting, polyvinylpyrrolidone is decomposed, and high dispersion and high loading of Pt can be obtained on the surface of graphene carrier to form Pt / graphene ene catalyst.

[0031] In the Pt / graphene catalyst prepared above, the dispersion degree of metal Pt on the surface of carbon-based support...

Embodiment 2

[0033] The carbon-based support was prepared by spray drying method, wherein graphene oxide and butyl titanate were used as carbon sources, and ethanol was used as solvent. The prepared carbon-based support graphene / TiO 2 The specific surface area is 1800m 2 / g, the porosity is 84%. Platinum nitrate (Pt(NO 3 ) 2 ) as a metal precursor and the chelating agent ethylenediaminetetraacetic acid are uniformly mixed to form a mixed solution. Adding the prepared graphene / TiO to the mixed solution 2 , using a rotary evaporator to dry it at a temperature of 90°C, during the drying process (Pt(NO 3 ) 2 ), EDTA and graphene / TiO 2 The carrier is fully combined, and then roasted at a temperature of 200 ° C, and decomposed by high-temperature roasting ethylenediaminetetraacetic acid, the graphene / TiO 2 High dispersion and high loading of Pt on the support surface to form graphene / TiO 2 catalyst.

[0034] The above-prepared Pt / graphene / TiO 2 In the catalyst, metal Pt on carbon-based...

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Abstract

The invention provides a preparation method of a carbon-based metal catalyst, comprising: preparing a carbon-based carrier, and then using a chelating agent to achieve effective combination of the carrier and a metal catalyst so as to prepare the carbon-based metal catalyst. The invention also provides a carbon-based metal catalyst and application of the carbon-based metal catalyst to removing gaseous benzene pollutants. The preparation process of the invention is simple and is easy to operate and promote. The prepared carbon-based metal catalyst has high dispersity, high capacity, good stability and long service life, can highly selectively remove gaseous benzene pollutants at low temperature, and can be widely applied to air purifiers, air conditioners, gas masks and ventilators to improve the selective removal of gaseous benzene pollutants and reduce pollution and harm to the environment and human body.

Description

technical field [0001] The invention relates to the field of metal catalysts, in particular to a carbon-based metal catalyst and its preparation method and application. Background technique [0002] Benzene series, in a broad sense, includes all aromatic compounds. It is a strong carcinogen, which is highly harmful to the blood, nerves, and reproductive system of the human body. In severe cases, it can even cause leukemia and aplastic anemia. Benzene and benzene series mainly come from synthetic fibers, plastics, fuels, rubber, etc., and are hidden in paints, additives of various coatings, various adhesives, and waterproof materials. In people's daily life, industrial production, decoration materials, automobile exhaust, office equipment such as copiers, printers, fax machines, and human activities such as smoking and cooking are all sources of benzene series pollutants, especially in recent years. The benzene series pollutants in the smog that appear in a large area have s...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J23/44B01J23/46B01J35/10B01D53/86B01D53/72
CPCB01D53/864B01J23/002B01J23/42B01J23/44B01J23/462B01D2257/7027B01J2523/00B01J35/394B01J35/618B01J2523/41B01J2523/47B01J2523/821
Inventor 不公告发明人
Owner KUANG CHI INST OF ADVANCED TECH
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