Preparation of molybdenum-doped nano-TiO2 by sol-gel method

A technology of nano-titanium dioxide and gel method, which is applied in the direction of catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, chemical instruments and methods, etc. Low efficiency and other problems, to achieve the effect of saving energy, improving photocatalytic efficiency, and high photocatalytic activity

Inactive Publication Date: 2011-11-30
张旭星
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Problems solved by technology

However, since the bandgap of titanium dioxide semiconductor is 3.2eV (anatase crystal form), photogenerated electrons and holes for photocatalytic degradation of organic matter can only be generated under the excitation of ultraviolet light with a wavelength less than 387nm, and the utilization efficiency of visible light is very low, and The recombination rate of photogenerated electron-hole pairs is high, the photon quantum efficiency is low, and the actual photocatalytic activity is not high

Method used

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Embodiment

[0027] 30ml of tetrabutyl titanate and 5ml of acetylacetone were slowly added to 90ml of absolute ethanol, mixed evenly, and stirred for 30min to obtain tetrabutyl titanate solution.

[0028] Then take quantitative distilled water, 0.55ml of concentrated nitric acid and 45ml of absolute ethanol mixed solution, and then slowly drop it into the vigorously stirred tetrabutyl titanate solution, and stir for 1 hour to obtain solution A.

[0029] A certain amount of ammonium heptamolybdate was weighed and dissolved in distilled water, the concentration of the solution was controlled to be 0.1 g / ml, and the volume of the solution was 6 ml.

[0030] The above ammonium molybdate solution was mixed with 0.55 ml of concentrated nitric acid and distilled water to obtain solution B.

[0031] Slowly drop solution B into solution A at a constant temperature of 50°C. After completion, continue stirring for 4 hours to form a yellow sol, stop the water bath and stirring, and age for 1 day.

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Abstract

The invention relates to the environment-friendly technical field of semiconductor nanomaterials, in particular to a sol-gel preparation method of molybdenum-doped nano-titanium dioxide with relatively high photocatalytic activity. The present invention is based on current research, and aims to better overcome the defect of high recombination rate of photogenerated electron-hole pairs in photocatalytic reaction, and prepare molybdenum-doped nano-titanium dioxide photocatalyst by sol-gel method. The production method of the invention is simple and the cost is low; the molybdenum-doped nano titanium dioxide prepared by the invention has the characteristic of high photocatalytic activity. It is widely used in automotive topcoats, photosensitive materials, photocatalysts, cosmetics, food packaging materials, ceramic additives, gas sensors and electronic materials.

Description

[technical field] [0001] The invention relates to the environment-friendly technical field of semiconductor nanomaterials, in particular to a sol-gel preparation method of molybdenum-doped nano-titanium dioxide with high photocatalytic activity. [Background technique] [0002] Nanoparticles are particles whose size is on the order of nanometers (10 -9 m) Ultrafine particles, whose size is larger than atomic clusters, smaller than ordinary particles, and the particle size is generally between 1 and 100nm. Due to the basic characteristics of nanoparticles such as small size effect, quantum size effect, surface effect and macroscopic quantum tunneling effect, nanoparticles and nanomaterials have unique optical, electrical, magnetic, thermal and catalytic properties that conventional particles and materials do not have. Nano-TiO 2 It is a functional fine inorganic nano-material with high added value. Because of its good weather resistance, chemical corrosion resistance, strong...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01J37/00
Inventor 张旭星
Owner 张旭星
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