Multi-walled carbon nano-tube supported manganese oxide-based catalyst preparation method

A multi-walled carbon nanotube, manganese oxide-based technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low conversion rate and duration, etc. question

Active Publication Date: 2015-10-14
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reported weakly crystalline manganese-based adsorption/catalyst (CN 103816918 A) is mainly aimed at weakly crystalline or amorphous manganese oxide, and has not studied the improvement of the catalytic performanc...

Method used

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  • Multi-walled carbon nano-tube supported manganese oxide-based catalyst preparation method
  • Multi-walled carbon nano-tube supported manganese oxide-based catalyst preparation method
  • Multi-walled carbon nano-tube supported manganese oxide-based catalyst preparation method

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Experimental program
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Effect test

Embodiment 1

[0017] 7g potassium permanganate (KMnO 4 ) was dissolved in 150ml of deionized water, and 5ml of concentrated sulfuric acid (95wt%) was added dropwise into the potassium permanganate solution with constant stirring. The reaction temperature was 160°C for 40 minutes, vacuum filtration, washing with a large amount of water, and drying in an oven at 60°C to obtain a non-supported manganese oxide-based catalyst, denoted as MS.

Embodiment 2

[0019] Disperse 0.3g of multi-walled carbon nanotubes in 50ml of deionized water, and sonicate for 20min; take 7g of potassium permanganate (KMnO 4 ) was dissolved in 150ml deionized water. The potassium permanganate solution was added dropwise to the multi-walled carbon nanotube dispersion and stirred continuously. After the dropwise addition, it was transferred to a polytetrafluoroethylene-lined hydrothermal crystallization kettle. The crystallization temperature was 160°C for 40 minutes. Vacuum filtration, washing with a large amount of water, and drying in an oven at 60°C, the multi-walled carbon nanotube-supported manganese oxide-based catalyst was prepared, which was designated as: MCNT-1.

Embodiment 3

[0021] Disperse 0.3g of multi-walled carbon nanotubes and 0.1g of polyvinylpyrrolidone in 50ml of deionized water, and sonicate for 20min; take 7g of potassium permanganate (KMnO4) and dissolve it in 150ml of deionized water. The potassium permanganate solution was added dropwise to the multi-walled carbon nanotube dispersion and stirred continuously. After the dropwise addition, it was transferred to a polytetrafluoroethylene-lined hydrothermal crystallization kettle. The crystallization temperature was 160°C for 40 minutes. Vacuum filtration, washing with a large amount of water, and drying in an oven at 60°C, the multi-walled carbon nanotube-supported manganese oxide-based catalyst was prepared, which was designated as: MCNT-140.

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Abstract

The present invention relates to a multi-walled carbon nano-tube supported manganese oxide-based catalyst preparation method, wherein an active component manganese oxide is loaded on multi-walled carbon nano-tubes by using an oxidation reduction method, and the catalyst manganese-based oxide obtained after drying is loaded on the carbon nano-tubes in a scaly manner, such that the specific surface area is increased, the relatively more active sites are easily exposed compared with the loading-free birnessite type manganese oxide, and the NO catalytic oxidation reaction activity under the normal temperature and normal pressure and the long-term stability are improved; and the process is simple, and the method can be used for the efficient purification treatment of the NO pollutants in parking areas, underground shopping malls and other enclosed spaces or urban highway tunnels, and has important social significance and practical application values.

Description

technical field [0001] The invention relates to a multi-walled carbon nanotube loaded manganese catalyst and its preparation, which is applied to the removal and purification of low-concentration NO at normal temperature in a semi-enclosed space, and can maintain high activity and high stability for a long time. Background technique [0002] Nitrogen oxides (NOx) are one of the main air pollutants that form nitric acid rain and photochemical smog and destroy the ozone layer, and are highly toxic. Due to the restriction of natural ventilation in semi-enclosed spaces such as tunnels and parking lots, the exhaust emitted by motor vehicles cannot be discharged in time, and nitrogen oxides (NOx) accumulate, causing serious air pollution. Among them, nitric oxide (NO) accounts for 90%-95% of the total NOx, and the effective removal and purification of NO is particularly important. NO treatment technologies include catalytic reduction, catalytic decomposition, plasma, liquid absor...

Claims

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Application Information

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IPC IPC(8): B01J23/34B01D53/86B01D53/56
Inventor 何丹农张涛高振源赵昆峰杨玲袁静蔡婷金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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