Physical activation method for preparing platinum-modified porous carbon-based titanium dioxide photocatalyst for eliminating formaldehyde at room temperature
A formaldehyde elimination and physical activation technology, applied in the field of environmental protection, can solve the problems of lack of research reports, etc., and achieve the effect of simple preparation method, good performance and good porosity
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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 24 hours, put it into a tube furnace, raise the temperature to 600°C at a rate of 10°C / min under argon flow, and keep it warm for 3 hours, then raise the temperature to 950°C, pass in water vapor for activation for 2 hours, and obtain 0.17g Platinum-modified porous carbon-based titania catalyst with a specific surface area of 2886 m 2 / g, recorded as 1# catalyst.
[0013] The test process of the room temperature degradation formaldehyde...
Embodiment 2
[0015] Others are the same as catalyst 1#, the platinum-modified porous carbon-based titania catalyst is prepared at an activation temperature of 850°C, and 0.18g of a platinum-modified porous carbon-based titania catalyst is obtained with a specific surface area of 2950m 2 / g is recorded as 2# catalyst, and others are similar to Example 1. The room temperature degradation formaldehyde performance test process of 1# catalyst is also similar to Example 1. After 1 hour of catalytic degradation, the degradation rate of formaldehyde reached 93.7%.
Embodiment 3
[0017] Others are the same as catalyst 1#, the platinum-modified porous carbon-based titanium dioxide catalyst is prepared at an activation temperature of 750°C, and 0.19g of platinum-modified porous carbon-based titanium dioxide catalyst is obtained, and its specific surface area is 2593m 2 / g is recorded as 3# catalyst, and others are similar to Example 1. The room temperature degradation formaldehyde performance test process of 1# catalyst is also similar to Example 1. After 1 hour of catalytic degradation, the degradation rate of formaldehyde reached 88.4%.
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