Preparation method of rodlike tantalum pentoxide nanocrystalline/graphene compound photocatalyst
A composite technology of tantalum pentoxide and graphene, which is applied in the field of photocatalysis, can solve the problems of low separation efficiency and catalytic performance limitation, and achieve the effect of improving catalytic performance and photocatalytic performance
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Embodiment 1
[0024] The rod-shaped tantalum pentoxide nanocrystal / graphene composite photocatalyst comprises the following steps during preparation:
[0025] The first step, the preparation process of the precursor solution of the rod-shaped tantalum pentoxide / graphene composite is as follows: dissolve 0.1g of tantalum pentoxide in 1ml of hydrofluoric acid, then add 2ml of hydrogen peroxide to the solution, and then add 2ml of ammonia water ,, to prepare a water-soluble tantalum pentoxide precursor solution, add 0.2g graphene oxide and stir evenly.
[0026] In the second step, the obtained solution was put into an ultrasonic instrument, and ultrasonicated at room temperature for 1 hour at a power of 200W.
[0027] In the third step, the composite precursor solution was put into a hydrothermal kettle, and hydrothermally reacted in an oven at 100° C. for 6 hours.
[0028] In the fourth step, the compound obtained after the hydrothermal reaction was centrifuged several times with deionized w...
Embodiment 2
[0031] The rod-shaped tantalum pentoxide nanocrystal / graphene composite photocatalyst comprises the following steps during preparation:
[0032] The first step, the preparation process of the precursor solution of the rod-shaped tantalum pentoxide / graphene composite is as follows: dissolve 0.1g tantalum pentoxide in 5ml hydrofluoric acid, then add 3ml hydrogen peroxide to the solution, centrifuge and then add 3ml ammonia water, add the prepared graphene oxide suspension and stir evenly.
[0033] In the second step, the obtained mixed solution was put into an ultrasonic instrument, and ultrasonicated at room temperature for 2 hours at a power of 250W.
[0034] In the third step, the above solution is put into a hydrothermal kettle, and subjected to hydrothermal reaction in an oven at 240° C. for 12 hours.
[0035] In the fourth step, the compound obtained after the hydrothermal reaction was centrifuged several times with deionized water and ethanol, and then dried in a blast d...
Embodiment 3
[0038] The rod-shaped tantalum pentoxide nanocrystal / graphene composite photocatalyst comprises the following steps during preparation:
[0039] The first step, the precursor solution configuration process of the rod-shaped tantalum pentoxide / graphene composite is as follows: dissolve 0.5g tantalum pentoxide in 8ml hydrofluoric acid, then add 5ml ammonia water to the solution, and then add 10ml hydrogen peroxide , add the prepared graphene oxide suspension and stir evenly.
[0040] In the second step, the above solution was put into an ultrasonic instrument, and ultrasonicated at room temperature for 3 hours at a power of 300W.
[0041] In the third step, the mixed solution is put into a hydrothermal kettle, and subjected to hydrothermal reaction in an oven at 240° C. for 24 hours.
[0042] In the fourth step, the compound obtained after the hydrothermal reaction was centrifuged several times with deionized water and ethanol, and then dried in a blast drying oven at 60° C. fo...
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