A preparation method of waste textile bismuth tungstate composite airgel
A technology of waste textiles and composite airgel, applied in airgel preparation, chemical instruments and methods, colloid chemistry, etc., to achieve excellent photocatalytic performance, good repeatability, and easy mass production
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Embodiment 1
[0033] The waste cotton cloth with a size of 5 cm × 5 cm was ultrasonically cleaned with acetone and ethanol for 20 min, dried, crushed, and set aside. Weigh 3g of cotton, add it to 24ml of 64% sulfuric acid solution, stir for 5min, dissolve, place in a constant temperature water bath, stir mechanically at a temperature of 50°C for 1h, centrifuge with deionized water, dialyze, repeat three times until the filtrate It is neutral and dried to obtain nanocellulose. Bismuth nitrate and sodium tungstate were added to deionized water at a molar ratio of 2:1, the concentration of bismuth nitrate was 2mol / L, stirred for 30 minutes, ultrasonicated for 30 minutes, the solution was placed in a reaction kettle at 180°C for 24 hours, suction filtered, and dried to obtain Bismuth tungstate powder. Weigh 0.2g of bismuth tungstate powder and add it to 90ml of water, stir for 30min, and ultrasonicate for 30min to obtain a bismuth tungstate dispersion, add 6g of sodium hydroxide and 4g of urea...
Embodiment 2
[0036]Use acetone and ethanol to ultrasonically clean waste sackcloth with a size of 5 cm × 5 cm for 30 min, dry, crush, and set aside. Weigh 3g of sackcloth, add it to 60ml of 1mol / L ammonium persulfate solution, stir for 15min, dissolve, place in a constant temperature water bath, stir mechanically at a temperature of 60°C for 2h, centrifuge with deionized water, dialyze, repeat three times , until the filtrate is neutral, and vacuum-dried to obtain nanocellulose. Bismuth nitrate and sodium tungstate were added to deionized water at a molar ratio of 1:1, the concentration of bismuth nitrate was 4mol / L, stirred for 45 minutes, ultrasonicated for 60 minutes, the solution was placed in a reaction kettle at 200°C for 12 hours, suction filtered, and dried to obtain Bismuth tungstate powder. Weigh 0.1g of bismuth tungstate powder and add it to 85ml of water, stir for 40min, and ultrasonicate for 40min to obtain a bismuth tungstate dispersion, add 9.5g of sodium hydroxide and 4.5g...
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