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Loaded reduced precious metal catalyst as well as preparation method and application thereof

A noble metal catalyst and supported technology, which is applied in the field of supported reduced noble metal catalyst and its preparation, can solve the problems of complex catalyst preparation process, and achieve the effects of low energy consumption, mild reaction conditions and good stability

Active Publication Date: 2011-08-03
黄海保
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN 274281A relates to a catalyst for removing formaldehyde in the air at room temperature and its preparation method. The catalyst is a Co-Ce-Sn porous composite oxide loaded with noble metal platinum. The catalyst is finally treated by pre-high temperature oxidation to obtain an active component of oxidation state Pt, and the catalyst preparation process is very complicated

Method used

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  • Loaded reduced precious metal catalyst as well as preparation method and application thereof
  • Loaded reduced precious metal catalyst as well as preparation method and application thereof
  • Loaded reduced precious metal catalyst as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0029] A kind of supported reduced noble metal catalyst, with TiO 2 It is a carrier, and its active component is the reduced noble metal platinum, and its content accounts for 1% of the total weight of the catalyst. It is prepared by the following method:

[0030] TiO2-supported noble metal catalysts with 1% platinum prepared by different reduction methods.

[0031] Preparation of 1%Pt / TiO by Reduction of Sodium Borohydride 2 Catalyst (identified as 1%Pt / TiO 2 -NaBH 4 ) is as follows: Weigh 2.5g of titanium dioxide, add 10ml of deionized water and stir continuously, add 12.82ml of 0.01mol / L chloroplatinic acid aqueous solution dropwise, stir for 1h, and adjust the pH value of the suspension to 8. At room temperature, 5 ml of aqueous solution containing 25 mg of sodium borohydride was added, and stirred for 1 h. Place in a water bath with constant stirring, and heat at 80°C to remove moisture from the solution. After drying in an oven at 80°C for 2h, continue heating at 1...

Embodiment 2

[0038] A kind of supported reduced noble metal catalyst, with TiO 2 It is a carrier, and its active component is palladium, a noble metal in reduced state, and its content accounts for 1% of the total weight of the catalyst. It is prepared by the following method:

[0039] Noble metal catalysts with 1% palladium supported on titania prepared by different methods.

[0040] Preparation of 1%Pd / TiO by impregnation-sodium borohydride reduction 2 Catalyst (identified as 1%Pd / TiO 2 -IMP-NaBH 4 ) is as follows: Weigh 2 g of titanium dioxide, add 10 ml of deionized water and stir continuously, add 8.4 ml of 0.0242 mol / L palladium chloride aqueous solution dropwise, and stir for 1 h. At room temperature, 5 ml of aqueous solution containing 25 mg of sodium borohydride was added, and stirred for 1 h. Place in a water bath with constant stirring, and heat at 80°C to remove moisture from the solution. After drying in an oven at 80°C for 2h, continue heating at 120°C for 4h to obtain ...

Embodiment 3

[0048] A kind of supported reduced noble metal catalyst, with TiO 2 It is a carrier, and its active component is reduced noble metal gold, and its content accounts for 1% of the total weight of the catalyst. It is prepared by the following method:

[0049] TiO2-supported noble metal catalysts with 1% gold prepared by different methods.

[0050] Preparation of 1% Au / TiO by Impregnation-NaBH Reduction Method 2 Catalyst (identified as 1% Au / TiO 2 -IMP-NaBH 4 ) is as follows: Weigh 2 g of titanium dioxide, add 10 ml of deionized water and stir continuously, add 10.1 ml of 0.01 mol / L aqueous chloroauric acid solution dropwise, and stir for 1 h. Add 5ml of aqueous solution containing 30mg of sodium borohydride at room temperature, and stir for 1h. Place in a water bath with constant stirring, and heat at 80°C to remove moisture from the solution. After drying in an oven at 80°C for 2h, continue heating at 120°C for 4h to obtain 1% Au / TiO 2 -IMP-NaBH 4 catalyst.

[0051] 1%A...

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Abstract

The invention discloses a loaded reduced precious metal catalyst. The active component of the catalyst is one or more selected of reduced precious metal platinum, palladium, gold and silver, the active component accounts for 0.01-10% of the total weight of the catalyst, and the loaded reduced precious metal catalyst is prepared by adopting a low-temperature liquid phase reduction method. The invention also discloses a preparation method and application of the loaded reduced precious metal catalyst. The loaded reduced precious metal catalyst has high efficiency for removing formaldehyde in theair and can be widely applied to purification of formaldehyde in an industrial process and indoor air. The loaded reduced precious metal catalyst disclosed by the invention also has the advantages ofgood stability, simple preparation process, mild preparation and reaction conditions, low precious metal content, low use cost and the like.

Description

technical field [0001] The invention belongs to the technical field of industrial catalysis and air purification, and in particular relates to a supported reduced noble metal catalyst and its preparation method and application. Background technique [0002] Formaldehyde is an important chemical raw material, widely used in synthetic resins, surfactants, plastics, rubber, leather, paper, dyes, pharmaceuticals, pesticides, photographic film, explosives, building materials, and processes such as disinfection, fumigation and anticorrosion. Pollution widely exists in the above industrial projects. At the same time, formaldehyde is also an important indoor air pollutant, and its sources include building materials (such as artificial boards), decorative materials (such as furniture, wallpaper, wall coverings, chemical fiber carpets, paints, coatings) and chemical products such as daily necessities (such as cosmetics, cleaners, insecticides, disinfectants, preservatives, paper, tex...

Claims

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Application Information

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IPC IPC(8): B01J37/16B01J23/42B01J23/44B01J23/52B01J23/50B01J23/63B01J23/66B01D53/86B01D53/72
Inventor 黄海保梁耀彰
Owner 黄海保
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