Cellulose nanofibril aerogel loaded with photocatalyst and preparation method thereof
A technology of nanofibrils and photocatalysts, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. It can solve problems such as difficulty in recycling, affecting photocatalytic performance, and easy agglomeration of nanomaterials. Achieve enhanced response, good photocatalytic degradation ability, and reduce the effect of recombination
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Embodiment 1
[0035] An embodiment of the cellulose nanofibril airgel loaded with photocatalyst and the preparation method thereof of the present invention, wherein the preparation method of the airgel comprises the following steps:
[0036] (1) Weigh 0.01mol of Bi(NO 3 ) 3 .5H 2 O is dissolved in 100ml of cellulose nanofibril suspensions with a mass fraction of 0.8wt% (the aspect ratio of cellulose nanofibrils is 100-2000), and the solution is ultrasonicated for 1 minute with an ultrasonic cell pulverizer, and the ultrasonic power is 200W , ultrasonic 5 seconds / interval 5 seconds, so that Bi(NO 3 ) 3 .5H 2 O was fully dissolved in the cellulose nanofibril suspension to obtain a mixed solution.
[0037] (2) Vacuum freeze-drying the mixed solution obtained above to prepare cellulose nanofibril airgel loaded with bismuth ions.
[0038] (3) 0.005 mol of KBr and 0.005 mol of KCl were weighed and dissolved in 100 ml of deionized water, and fully stirred to prepare a KBr / KCl mixed solution....
Embodiment 2
[0043] An embodiment of the cellulose nanofibril airgel loaded with photocatalyst and the preparation method thereof of the present invention, wherein the preparation method of the airgel comprises the following steps:
[0044] (1) Weigh 0.02mol of Bi(NO 3 ) 3 .5H 2 O is dissolved in 100 ml of cellulose nanofibril suspension with a mass fraction of 1.0 wt % (the aspect ratio of cellulose nanofibril is 100-2000). Sonicate the solution with an ultrasonic cell disruptor for 1 minute, the ultrasonic power is 200W, and the ultrasonic wave is 5 seconds / interval 5 seconds, so that the Bi(NO 3 ) 3 .5H 2 O was fully dissolved in the cellulose nanofibril suspension to obtain a mixed solution.
[0045] (2) Vacuum freeze-drying the mixed solution obtained above to prepare cellulose nanofibril airgel loaded with bismuth ions.
[0046] (3) 0.01 mol of KBr and 0.01 mol of KCl were weighed and dissolved in 100 ml of deionized water, and fully stirred to prepare a KBr / KCl mixed solution....
Embodiment 3
[0051] An embodiment of the cellulose nanofibril airgel loaded with photocatalyst and the preparation method thereof of the present invention, wherein the preparation method of the airgel comprises the following steps:
[0052] (1) Weigh 0.05mol of Bi(NO 3 ) 3 .5H 2 O is dissolved in 100 ml of cellulose nanofibril suspension with a mass fraction of 1.0 wt % (the aspect ratio of cellulose nanofibril is 100-2000). Sonicate the solution with an ultrasonic cell disruptor for 1 minute, the ultrasonic power is 200W, and the ultrasonic wave is 5 seconds / interval 5 seconds, so that the Bi(NO 3 ) 3 .5H 2 O was fully dissolved in the cellulose nanofibril suspension to obtain a mixed solution.
[0053] (2) Vacuum freeze-drying the mixed solution obtained above to prepare cellulose nanofibril airgel loaded with bismuth ions.
[0054] (3) 0.02 mol of KBr and 0.03 mol of KCl were weighed and dissolved in 100 ml of deionized water, and fully stirred to prepare a KBr / KCl mixed solution....
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