Titanium dioxide nano wire microsphere photocatalysis material with hydrogenated surface and preparation method thereof

Abstract

The invention discloses a titanium dioxide nano wire microsphere photocatalysis material with a hydrogenated surface and a preparation method thereof. The microsphere has a diameter of 3-6mu m, the sphere is composed of anatase titanium dioxide nano wires with the diameter of 7-9nm, the specific surface area is 75m<2> / g and the pore volume is 1.02cm<3> / g. The preparation method comprises the following steps: placing a titanic hydroxide nanotube microsphere precursor in a quartz boat in the center of a quartz tube, then placing the quartz tube horizontally in a tubular furnace, and continuously introducing mixed H2 with the flow of 200-300sccm, wherein the mixed H2 contains 5% H2 and 95% N2 by volume percent; raising the temperature of the tubular furnace at the rate of 3-5 DEG C / min to 500 DEG C, keeping the temperature for 2-4h, stopping introducing the mixed H2 until the tubular furnace is naturally cooled to 150 DEG C, and collecting the product to obtain the titanium dioxide nano wire microsphere photocatalysis material with the hydrogenated surface. The microsphere disclosed by the invention has remarkably enhanced visible light absorption, ensures that a great amount of hydroxyl radicals can be generated under the irradiation of visible light, and has enhanced hydrogen-making efficiency by water photolysis and 2,4-chlorophenosic acid photocatalytic degradation activity under full-spectrum irradiation.

Description

[0001] technical field

[0002] The invention relates to a surface-hydrogenated titanium dioxide nanowire microsphere photocatalytic material and a preparation method thereof, which can be used for photolysis of water to produce hydrogen and degrade organic pollutants, and belongs to the technical field of titanium dioxide catalysts. Background technique

[0003] Energy and environmental issues are the main issues facing people in the world today. Titanium dioxide can effectively use the ultraviolet region of solar energy to photolyze water to produce hydrogen and oxidize organic pollutants, and has become the most widely used semiconductor photocatalytic material. However, its large forbidden band width and fast electron-hole recombination rate greatly limit the photocatalytic efficiency of titanium dioxide. For the restriction factor of carrier recombination, it can be improved by improving the charge transport behavior (usually by improving nano level morphology) to impr...

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