Preparation method of high-specific surface area platinum-modified porous carbon-based titanium dioxide photocatalyst for eliminating formaldehyde at room temperature

A technology with high specific surface area and elimination of formaldehyde, applied in the field of preparation of platinum-modified porous carbon-based titanium dioxide catalyst with high specific surface area, can solve the problems of lack of research reports, and achieve the effect of simple preparation method, controllable shape and good porosity

Inactive Publication Date: 2018-10-16
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

However, there are still very few research reports on the preparation of high specific surface area platinum-modified porous carbon-based titanium dioxide catalysts with high specific surface area for eliminating formaldehyde at room temperature by zinc chloride activation method.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Weigh 0.4g of ZTOF-1 into a tube furnace, raise the temperature to 400°C at a rate of 10°C / min under argon flow, and keep it for 5h to prepare 0.19g of titanium-containing carbon-based composite material. According to the mass ratio of platinum and titanium-containing carbon-based composite material, the obtained titanium-containing carbon-based composite material was added to a chloroplatinic acid solution with a concentration of 4 g / L, and after immersion at 20 ° C for 24 hours, the precipitate was taken out. Vacuum bake at 80°C for 24h, then mix the resulting product and analytically pure zinc chloride solid in a mass ratio of 1:2, put it into a tube furnace, and heat up to 950°C at a rate of 10°C / min under an argon stream. ℃, activated for 2 hours, the activated product was washed with deionized water until the pH of the filtrate was 6-7, and after vacuum drying, 0.16g of platinum-modified porous carbon-based titanium dioxide catalyst was obtained, and its specific s...

Embodiment 2

[0015] Others are the same as catalyst 1#, the platinum-modified porous carbon-based titanium dioxide catalyst is prepared at an activation temperature of 850°C, and 0.17g of platinum-modified porous carbon-based titanium dioxide catalyst is obtained, and its specific surface area is 3136m 2 / g is recorded as 2# catalyst, and others are similar to Example 1. The room temperature degradation formaldehyde performance test process of 2# catalyst is also similar to Example 1. After 1 hour of catalytic degradation, the degradation rate of formaldehyde reached 96.8%.

Embodiment 3

[0017] Others are the same as 1# catalyst, the activation temperature of the platinum-modified porous carbon-based titanium dioxide catalyst is 750°C during preparation, and 0.21g of platinum-modified porous carbon-based titanium dioxide catalyst is obtained, and its specific surface area is 2767m 2 / g is recorded as 3# catalyst, and others are similar to Example 1. The room temperature degradation formaldehyde performance test process of the 3# catalyst is also similar to that of Example 1. After 1 hour of catalytic degradation, the degradation rate of formaldehyde reached 91.1%.

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Abstract

The invention relates to the technical field of environmental protection, in particular to a preparation method of a high-specific surface area platinum-modified porous carbon-based titanium dioxide photocatalyst for eliminating formaldehyde at room temperature. The method comprises the steps of: using a titanium-based metal organic framework compound as a precursor, preparing a titanium-containing carbon-based composite material through high-temperature carbonization firstly, performing soaking in a chloroplatinic acid solution, then performing mixing with zinc chloride, and finally performing high-temperature activation, water washing and drying so as to obtain the platinum-modified porous carbon-based titanium dioxide photocatalyst. The preparation method is simple and practical, regulation of the performance of the photocatalyst can be achieved by changing the variety and activation temperature of the titanium-based metal organic framework compound, and the obtained platinum-modified porous carbon-based titanium dioxide photocatalyst has the advantages of good porosity, a controllable pore shape, a high specific surface area, good performance of oxidative decomposition of formaldehyde at room temperature and the like, and can be widely applied to air conditioning equipment, ventilation ducts, air purifiers and other devices.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for preparing a high specific surface area platinum-modified porous carbon-based titanium dioxide catalyst for eliminating formaldehyde at room temperature. Background technique [0002] Formaldehyde is a common indoor air pollutant that can irritate people's eyes, nose, and throat organs, leading to severe allergic symptoms such as rashes, and is also considered a potential carcinogen. According to the national standard of the People's Republic of China "Hygienic Standards for Formaldehyde in Indoor Air", the maximum allowable concentration of formaldehyde in indoor air is 0.08mg / m 3 , but the average concentration of newly installed houses in daily life is greater than 0.2mg / m 3 . In recent years, the use of air purifiers to deal with indoor formaldehyde pollution has become a relatively common means of household air purification. In the process of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J37/03B01J37/08B01J35/10A62D3/30A62D101/28
CPCB01J23/42A62D3/30A62D2101/28B01J35/1028B01J37/035B01J37/084B01J37/086
Inventor 陈高健徐清范冬梅张靖桢
Owner NINGBO UNIV
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