Halloysite nanotube-based composite photocatalyst as well as preparation method and application thereof
A technology of halloysite nanotubes and composite light, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve photocatalytic degradation efficiency and degradation ability improvement, good application value, and easy recycling The effect of using
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Embodiment 1
[0021] A preparation method of a halloysite nanotube-based composite photocatalyst, comprising the following steps:
[0022] S1. Add 5 g of halloysite nanotubes to 1000 mL of dopamine hydrochloride solution with a concentration of 0.5 g / L and stir for 4 h, centrifuge and dry after the reaction is completed to obtain polydopamine-coated halloysite nanotubes, wherein the dopamine hydrochloride solution is a mixture of Dopamine hydrochloride was dissolved in Tris-HCl buffer solution with pH 8.5;
[0023] S2. Disperse 1 g of polydopamine-coated halloysite nanotubes evenly in 50 mL of water, then add 0.5 g of hexamethylenetetramine to fully dissolve to obtain a mixed solution, dissolve 1 g of zinc nitrate in 50 mL of water to obtain an aqueous solution of zinc nitrate, and then add The mixture was mixed with an aqueous solution of zinc nitrate, stirred evenly, and then hydrothermally reacted at 90 °C for 10 h. After the reaction was completed, centrifuged, dried, and calcined in a ...
Embodiment 2
[0025] A preparation method of a halloysite nanotube-based composite photocatalyst, comprising the following steps:
[0026] S1. Add 10 g of halloysite nanotubes to 1000 mL of dopamine hydrochloride solution with a concentration of 1 g / L, and stir for 8 hours. After the reaction is completed, centrifuge and dry to obtain polydopamine-coated halloysite nanotubes, wherein the dopamine hydrochloride solution is hydrochloric acid. Dopamine was dissolved in Tris-HCl buffer solution with pH 8.5;
[0027] S2. Disperse 1 g of polydopamine-coated halloysite nanotubes evenly in 50 mL of water, then add 0.8 g of hexamethylenetetramine to fully dissolve to obtain a mixed solution, dissolve 2 g of zinc nitrate in 50 mL of water to obtain an aqueous solution of zinc nitrate, and then add The mixed solution was mixed with an aqueous solution of zinc nitrate, stirred evenly, and then hydrothermally reacted at 110 °C for 4 hours. After the reaction was completed, centrifuged, dried, and calcin...
Embodiment 3
[0029] A preparation method of a halloysite nanotube-based composite photocatalyst, comprising the following steps:
[0030] S1. Add 8 g of halloysite nanotubes to 1000 mL of dopamine hydrochloride solution with a concentration of 0.6 g / L, and stir for 5 h. After the reaction is completed, centrifuge and dry to obtain polydopamine-coated halloysite nanotubes, wherein the dopamine hydrochloride solution is a Dopamine hydrochloride was dissolved in Tris-HCl buffer solution with pH 8.5;
[0031] S2. Disperse 1 g of polydopamine-coated halloysite nanotubes evenly in 50 mL of water, then add 0.6 g of hexamethylenetetramine to fully dissolve to obtain a mixed solution, and dissolve 1.5 g of zinc nitrate in 50 mL of water to obtain an aqueous solution of zinc nitrate, The mixed solution was then mixed with an aqueous solution of zinc nitrate, stirred evenly, and then hydrothermally reacted at 100 °C for 5 h. After the reaction was completed, centrifuged, dried, and calcined in a nitr...
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