Z-type heterojunction photo-thermal catalyst for purifying organic gas pollutants in air and inhibiting bacteria
A technology for organic gas and air purification, which is applied in the field of Z-type heterojunction photothermal catalysts, and achieves the effect of simple composition and preparation method, and easy popularization and application.
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Embodiment 1
[0019] Take 0.5 g of strontium titanate powder and ultrasonically disperse it in 30 mL of deionized water. Under vigorous stirring, according to the silver loading in the target product as 1 wt.%, add an appropriate amount of silver nitrate aqueous solution drop by drop, and then add the reducing agent The molar ratio of Ag to Ag is 4, add sodium borohydride aqueous solution, continue to stir for 4 h, wash the solid product with deionized water and absolute ethanol several times after centrifugation, and obtain the fixed product after drying in an oven at 80°C. Ag / SrTiO 3 . Ag / SrTiO 3 Add the powder and a certain amount of copper sulfate required based on the loading of Cu in the target product to 5 wt.% into 60 mL of 0.2 mol / L NaOH solution, stir for 0.5 h, and then press the copper oxide in the target product Medium Cu + / Cu 2+ If the molar ratio is ~1, a certain amount of 0.1 mol / L L-ascorbic acid aqueous solution is added dropwise to control the valence state of copper...
Embodiment 2
[0021] Take 0.5 g anatase TiO 2 Ultrasonic dispersion of the powder in 30 mL deionized water, under vigorous stirring, based on the silver loading of the target product as 3wt.%, add an appropriate amount of silver acetate aqueous solution drop by drop, and then add the amount of reducing agent to the molar ratio of Ag The amount was 20, adding potassium borohydride aqueous solution, continued to stir for 4 h, washed the solid product with deionized water and absolute ethanol several times after centrifugation, and dried it in an oven at 80 °C to obtain the fixed product Ag / TiO 2 . Ag / TiO 2 Add the powder and a certain amount of copper nitrate required based on the target product with a Cu loading of 8 wt.% into 60 mL of 0.2 mol / L NaOH solution, stir for 0.5 h, and then press the copper oxide in the target product Medium Cu + / Cu 2+ A certain amount of 0.1 mol / L sodium citrate aqueous solution is added dropwise to control the valence state of copper element if the molar ra...
Embodiment 3
[0023] Take 0.5 gP25 (anatase TiO 2 and rutile TiO 2 4:1 molar ratio mixed) powder ultrasonically dispersed in 30 mL deionized water, under vigorous stirring, based on the silver loading in the target product being 0.5 wt.%, add an appropriate amount of silver nitrate aqueous solution drop by drop, and then press The amount of reducing agent added to the molar ratio of Ag is 50, add sodium borohydride aqueous solution, continue stirring for 4 h, wash the solid product with deionized water and absolute ethanol several times after centrifugation, and dry it in an oven at 80 °C After obtaining the fixed product Ag / SrTiO 3 . Add Ag / P25 powder and a certain amount of copper sulfate required based on the target product’s Cu loading of 3 wt.% into 60 mL of 0.2 mol / L NaOH solution, stir for 0.5 h, and then press the target product Cu in copper oxide + / Cu 2+ A certain amount of 0.1 mol / L glucose aqueous solution is added dropwise to control the valence state of copper element if...
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