Composite photocatalyst and preparation method thereof
A catalyst and composite light technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low photocatalytic efficiency of zinc oxide, etc. Area promotion, low preparation cost, and the effect of improving photocatalytic activity
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[0023] The embodiment of the present invention provides a kind of preparation method of composite photocatalyst, this method comprises:
[0024] Dip the array of zinc oxide nanorods arranged on the substrate into the ammonium metatungstate solution, so that the ammonium metatungstate is adsorbed on the zinc oxide nanorods;
[0025] The substrate on which the zinc oxide nanorod array is arranged is taken out, cleaned and dried, and then roasted to decompose the adsorbed ammonium metatungstate to obtain a composite photocatalyst composed of zinc oxide and zinc tungstate.
[0026] Specifically, the ammonium metatungstate solution can be prepared according to conventional methods, and the specific method includes: dissolving ammonium metatungstate in water to obtain an ammonium metatungstate solution with a concentration of 0.05-0.15 mol / L.
[0027] Specifically, the base material is glass, sapphire, silicon or silicon carbide.
[0028] The preparation method of the substrate arr...
Embodiment 1
[0035] Dissolve ammonium metatungstate in water to prepare ammonium metatungstate solution, the concentration of the obtained ammonium metatungstate solution is 0.05mol / L, and store it at room temperature.
[0036] The zinc oxide nanorod array arranged on the substrate is immersed in the ammonium metatungstate solution for 7 hours, so that the ammonium metatungstate is adsorbed on the zinc oxide nanorod; the material of the substrate can be glass, and the average diameter of the zinc oxide nanorod is 200nm , with a length of 1 μm.
[0037] Take out the substrate with zinc oxide nanorod arrays, rinse it with distilled water, dry it in an oven, and bake it in a heat treatment furnace at 600°C for 1 hour to decompose the adsorbed ammonium metatungstate to obtain a composition containing zinc oxide and tungstic acid. Zinc composite photocatalyst.
[0038] The composite photocatalyst that embodiment one makes utilizes scanning electron microscope to carry out morphology characteri...
Embodiment 2
[0040] Dissolve ammonium metatungstate in water to prepare ammonium metatungstate solution, the concentration of the obtained ammonium metatungstate solution is 0.1mol / L, and store it at room temperature.
[0041] The zinc oxide nanorod array arranged on the substrate is immersed in the ammonium metatungstate solution for 3 hours, so that the ammonium metatungstate is adsorbed on the zinc oxide nanorod; the material of the substrate can be sapphire, and the average diameter of the zinc oxide nanorod is 100nm , with a length of 2 μm.
[0042] Take out the substrate with zinc oxide nanorod arrays, rinse it with distilled water, dry it in an oven, and put it into a heat treatment furnace for 1.5 hours at 650°C to decompose the adsorbed ammonium metatungstate to obtain a composition containing zinc oxide and tungsten Zinc acid composite photocatalyst.
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