Thermally driven catalyst and applications thereof
A catalyst, heat-driven technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problems of solar energy loss, low photocatalyst degradation efficiency, etc. Achieve the effect of wide application, repeated use of catalytic performance and high catalytic efficiency
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[0037] Example 1: W@W 18 O 49 Preparation of heat-driven catalyst
[0038] In this embodiment, W@W 18 O 49 Thermally driven catalyst is taken as an example for detailed description, the W@W 18 O 49 The preparation method of the heat-driven catalyst includes the following steps:
[0039] (1) Connect the tungsten boat to the evaporation electrode of the vacuum thermal evaporation coating machine, and add 0.5 g of tungsten powder (purity 99.95%) into the tungsten boat, and then place the carbon fiber cloth on the tungsten boat to make the carbon fiber cloth and tungsten The distance of the boat is 2-100 mm.
[0040] (2) Turn on the mechanical pump to evacuate the vacuum coating chamber for 20 minutes.
[0041] (3) Pass oxygen (purity 99.95%) and inert gas (purity 99.95%) with a flow ratio of 1:100 into the vacuum coating chamber for 20 minutes.
[0042] (4) Continuously pass oxygen and inert gas into the vacuum coating chamber, turn on the thermal evaporation power supply, heat the tungs...
Example Embodiment
[0051] Example 2: Using infrared radiation heat to drive catalytic degradation of dye molecules and their repeated cycles under infrared irradiation test
[0052] Take the W@W plated product prepared in Example 1 18 O 49 Carbon fiber cloth for thermally driven catalyst (area 1.0cm 2 ) As a catalyst sample, it was added to 10ml of methyl orange solution (concentration 0.12mmol / L), and then the methyl orange solution was placed in an infrared oven equipped with a 250W infrared bulb to irradiate for 1.5 hours. The UV-visible absorption spectrum of the base orange solution, and the measured data are used as the characteristic curve of the concentration of methyl orange over time. Under the irradiation of infrared light, the temperature of the methyl orange solution rose from room temperature 30°C to 70°C and then stabilized.
[0053] See image 3 , Which is the characteristic curve diagram of the concentration of methyl orange solution changing with time in the experiment of catalyti...
Example Embodiment
[0057] Example 3: Experiments of using environmental heat to drive catalytic degradation of dye molecules and their repeated cycles in a dark environment
[0058] Take 4 pieces prepared in Example 1 and plated with W@W 18 O 49 Carbon fiber cloth for thermally driven catalyst (area 1.0cm 2 ) As a catalyst sample, add 4 bottles of 10ml methyl orange solution (concentration 0.12mmol / L), and then put 4 bottles of methyl orange solution at 5℃, 25℃, 50℃, 75℃ After 20 hours in the environment, test the ultraviolet-visible absorption spectra of 4 bottles of methyl orange solution, and use the measured data as the characteristic curve of methyl orange concentration with temperature.
[0059] See Figure 5 , Which is a comparison diagram of the catalytic performance at different temperatures in the repeated cycle test of catalytic degradation of dye molecules in the dark environment of this embodiment. It can be seen from this figure that in a dark environment, W@W 18 O 49 The heat-driven ...
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