Gold nanoparticle/iron-doped tungsten oxide room-temperature formaldehyde removal catalyst as well as preparation method and application thereof
A gold nanoparticle and iron-doped technology, which is applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve low efficacy, low formaldehyde efficiency, and low strength and other problems, to achieve the effects of reducing production costs, simple preparation methods, and large room for improvement
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[0031] The preparation method of the gold nanoparticle / iron-doped tungsten oxide catalyst for removing formaldehyde at room temperature comprises the following steps:
[0032] 1. Prepare a chloroauric acid aqueous solution with a concentration of 40mmol / L, a sodium borohydride aqueous solution with a concentration of 25mol / L, and a tungsten chloride (WCl 6 )weak;
[0033] 2. Under magnetic stirring, dissolve 0.5 g of polyvinylpyrrolidone in 40 mL of the chloroauric acid aqueous solution prepared in step 1, and then add the aqueous sodium borohydride solution prepared in step 1 dropwise to prepare gold colloids;
[0034] 3. Disperse the gold colloid prepared in step 2 in acetone to precipitate, after high-speed centrifugation, use absolute ethanol to wash the precipitate multiple times, and finally disperse it in 20mL of ethanol to form a gold colloid ethanol solution;
[0035] 4. FeCl 3 Dissolve the WCl prepared in step 1 6 In the ethanol solution, the concentration of iron...
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