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Flower-like titanium dioxide microsphere photocatalytic material and preparation method thereof

A photocatalytic material, titanium dioxide technology, applied in the field of photocatalysis, can solve the problems of complex process, poor repeatability, harshness, etc., and achieve the effect of low reaction temperature, short preparation cycle and mild conditions

Inactive Publication Date: 2012-06-20
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The present invention also aims at the problems of harsh conditions, complex process and poor repeatability in the current preparation method of titanium dioxide with special morphology, and finds a method with simple process, mild conditions and repeated preparation in large quantities for many times

Method used

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  • Flower-like titanium dioxide microsphere photocatalytic material and preparation method thereof
  • Flower-like titanium dioxide microsphere photocatalytic material and preparation method thereof
  • Flower-like titanium dioxide microsphere photocatalytic material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0019] Add secondary water, hydrogen peroxide and hydrochloric acid into the polytetrafluoroethylene lining of the reaction kettle so that the concentrations of hydrogen peroxide and hydrochloric acid are 1.2mol / L and 1.6mol / L respectively. Then, add 1.2×10 -4 mol of titanium trichloride, stirred evenly, put the mixture in a high-pressure reactor, put it in an oven at 180°C, and react for 18 hours.

[0020] After the reaction kettle was cooled to room temperature, the supernatant was absorbed and discarded. The lower precipitate was centrifuged and washed 6 times with secondary water. After washing, put the precipitate into an oven at 60° C. for 12 hours in vacuum to dry to obtain flower-shaped spherical microsphere titanium dioxide photocatalyst.

[0021] The scanning electron microscope figure of embodiment 1 gained product is as figure 1 As can be seen from the figure, the resulting product is a flower-shaped microsphere assembled from a double-pyramid-shaped titanium di...

Embodiment 2

[0024] Add secondary water, hydrogen peroxide and hydrochloric acid into the polytetrafluoroethylene lining of the reaction kettle so that the concentrations of hydrogen peroxide and hydrochloric acid are 1.6mol / L and 1.6mol / L respectively. Then, add 1.2×10 -4 mol of titanium trichloride, stirred evenly, put the mixture in a high-pressure reactor, put it in an oven at 180°C, and react for 18 hours.

[0025] After the reaction kettle was cooled to room temperature, the supernatant was absorbed and discarded. The lower precipitate was centrifuged and washed 6 times with secondary water. After washing, put the precipitate into an oven at 60° C. for 12 hours in vacuum to dry to obtain flower-shaped spherical microsphere titanium dioxide photocatalyst.

Embodiment 3

[0027] Add secondary water, hydrogen peroxide and hydrochloric acid into the polytetrafluoroethylene lining of the reactor, so that the concentrations of hydrogen peroxide and hydrochloric acid are 2.4mol / L and 1.6mol / L respectively. Then, add 1.2×10 -4 mol of titanium trichloride, stirred evenly, put the mixture in a high-pressure reactor, put it in an oven at 180°C, and react for 18 hours.

[0028] After the reaction kettle was cooled to room temperature, the supernatant was absorbed and discarded. The lower precipitate was centrifuged and washed 6 times with secondary water. After washing, put the precipitate into an oven at 60° C. for 12 hours in vacuum to dry to obtain flower-shaped spherical microsphere titanium dioxide photocatalyst.

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Abstract

The invention relates to flower-like titanium dioxide microsphere photocatalytic material and a preparation method thereof. The photocatalytic material is formed by double-pyramid shaped single crystals of titanium dioxide. The preparation method of the photocatalytic material comprises the following steps: (1) adding a titanium source into an aqueous solution system, adding hydrogen peroxide and hydrochloric acid which serve as the regulator for the hydrolysis of the titanium source and growth of the single crystals, and subjecting the materials to hydrothermal reaction at 120-220 DEG C for 3 to 36 hours to obtain flower-like titanium dioxide microspheres; (2) washing to remove other impurity ions in the solution by water washing centrifugation; and (3) drying samples by using a vacuum drying box to obtain the powder of the flower-like titanium dioxide microsphere photocatalytic material. The preparation method of the flower-like titanium dioxide microsphere photocatalytic material has the advantages of simple preparation process, mild condition and convenience of post-processing and is suitable for preparing the flower-like titanium dioxide microsphere photocatalytic material on a large scale.

Description

technical field [0001] The invention relates to a novel photocatalytic material with a special shape and a preparation method thereof, belonging to the technical field of photocatalysis. Background technique [0002] The rapid development of modern industry and science and technology, on the one hand, has greatly enriched people's material and cultural life and promoted the civilization and progress of human society. More and more pollutants containing benzene rings, heterocycles, halogenated compounds, NOx, SOx and other pollutants are discharged, which destroys the atmosphere, water sources and soil environment on which human beings depend, seriously affects the normal life and production of human beings, and even endangers of human existence. At present, government departments and research institutions in various countries have paid unprecedented attention to environmental pollution issues. Many countries have invested a lot of manpower and material resources in the rese...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J35/02
Inventor 田宝柱李套云包沈源张金龙董荣芳廉志鹏
Owner EAST CHINA UNIV OF SCI & TECH
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