Preparation method of phosphomolybdic acid-chitosan/nano composite photocatalyst
A nano-composite, photocatalyst technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc., can solve the problem of insufficient stability, poor selectivity, difficult recovery, etc. It can improve the photocatalytic activity, speed up the rate, and expand the absorption range.
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Embodiment 1
[0019] (1) Prepare a NaOH solution with a concentration of 10mol / L for later use.
[0020] (2) Weigh 0.5g of P25, add it to 30ml of the above NaOH solution, and disperse it by ultrasonic for 20 minutes.
[0021] (3) Add 1g of chitosan to the solution in step (2), stir magnetically for 30 minutes, add 0.17g of SDS to the above mixed solution, and continue stirring for 2 hours.
[0022] (4) Transfer the mixed solution in step (3) to a 100mL thermal reaction kettle, put it into an oven and heat it at 180°C, and the reaction time is 24 hours.
[0023] (5) Suction filter the product in step (4), wash it, and then place it in a vacuum oven for drying to finally obtain the product CS / P25.
[0024] (6) Prepare a phosphomolybdic acid solution with a certain concentration of 0.02g / ml, add 1g of the product in step (5) into the phosphomolybdic acid solution (5ml), stir it magnetically for 30 minutes, centrifuge it, and dry it to finally get the product phosphomolybdenum Acid - Chitosan...
Embodiment 2
[0026] (1) Prepare a NaOH solution with a concentration of 10mol / L for later use.
[0027] (2) Weigh 0.5g of P25, add it into the above NaOH solution, and disperse it by ultrasonic for 20 minutes.
[0028] (3) Add 1g of chitosan to the solution in step (2), stir magnetically for 30 minutes, then add 0.1g of SDS to the mixed solution, and continue stirring for 2 hours.
[0029] (4) Transfer the mixed solution in step (3) to a 100mL thermal reaction kettle, put it into an oven and heat it at 180°C, and the reaction time is 24 hours.
[0030] (5) Suction filter the product in step (4), wash it, and then place it in a vacuum oven for drying to finally obtain the product CS / P25.
[0031] (6) Prepare a phosphomolybdic acid solution with a certain concentration of 0.02g / ml, add 1g of the product in step (5) into the phosphomolybdic acid solution (5ml), stir it magnetically for 30 minutes, centrifuge it, and dry it to finally get the product phosphomolybdenum Acid - Chitosan / P25.
Embodiment 3
[0033] (1) Prepare a NaOH solution with a concentration of 10mol / L for later use.
[0034] (2) Weigh 0.5g of P25, add it into the above NaOH solution, and disperse it by ultrasonic for 20 minutes.
[0035] (3) Add 1g of chitosan to the solution in step (2), stir magnetically for 30 minutes, then add 0.15g of SDS to the mixed solution, and continue to stir for 2 hours.
[0036] (4) Transfer the mixed solution in step (3) to a 100mL thermal reaction kettle, put it in an oven and heat it at 150°C, and the reaction time is 24 hours.
[0037] (5) Suction filter the product in step (4), wash it, and then place it in a vacuum oven for drying to finally obtain the product CS / P25.
[0038] (6) Prepare a phosphomolybdic acid solution with a certain concentration of 0.02g / ml, add 1g of the product in step (5) into the phosphomolybdic acid solution (5ml), stir it magnetically for 30 minutes, centrifuge it, and dry it to finally get the product phosphomolybdenum Acid - Chitosan / P25.
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