Sol-gel preparation method for nickel-doped nano titanium dioxide
A nano-titanium dioxide and gel method technology is applied in the field of sol-gel preparation of nickel-doped nano-titanium dioxide, which can solve the problems of high recombination rate, low photocatalytic activity, low photon quantum efficiency, etc., and achieves energy saving and high photocatalysis. Activity, the effect of improving the photocatalytic efficiency
Inactive Publication Date: 2012-10-31
KUNSHAN ZHIJI MATERIAL TECH
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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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Effect test
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 heptanickelate 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 nickelate 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 technical field of semiconductor nano material environmental friendliness, in particular to a sol-gel preparation method for nickel-doped nano titanium dioxide with high photo catalytic activity. On the basis of current researches, the sol-gel preparation method overcomes the defect that photogenerated electrons-electron-hole pairs are high in recombination rate and is used for preparing nickel-doped nano titanium dioxide photocatalysis. The sol-gel preparation method is simple and low in cost. The nickel-doped nano titanium dioxide prepared by the method has high photo catalytic activity and is widely applicable to automotive finish, photosensitive materials, photocatalysis, cosmetics, food packaging materials, ceramic additives, gas sensors, electronic materials and the like.
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 nickel-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 UV ...
Claims
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IPC IPC(8): B01J23/755
Inventor 沈杰
Owner KUNSHAN ZHIJI MATERIAL TECH