Preparation method of titanium dioxide europium-doped nano-film sol

A technology of titanium dioxide and nanosheets, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of complex process and high cost of raw materials, and achieve the effects of good optical performance, energy saving and cost reduction

Inactive Publication Date: 2011-01-12
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the source of titanium dioxide is mainly the hydrolysis of butyl phthalate, which requires high raw material costs and complicated processes

Method used

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  • Preparation method of titanium dioxide europium-doped nano-film sol
  • Preparation method of titanium dioxide europium-doped nano-film sol
  • Preparation method of titanium dioxide europium-doped nano-film sol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] a, 5g metatitanic acid (H 2 TiO 3 ) was washed with distilled water several times, put in an oven and baked at 60°C for 12 hours, and 0.01g of europium trioxide (Eu 2 o 3 ) is dissolved in 0.16ml of 1mol / l nitric acid to obtain europium ions.

[0021] b. Add 5g H 2 TiO 3 with 6.9g K 2 CO 3 Mix evenly, take 0.16ml of europium ions prepared in a and add to the mixture. At this time, the mass fraction of europium accounts for 0.2% of the mass fraction of titanium, then add 5ml of absolute ethanol, and grind thoroughly.

[0022] c. Put the mixture in b in a muffle furnace and react at 600°C to 1000°C for 6 hours.

[0023] d. Take out the calcined material, add 1mol / L hydrochloric acid to stir at a ratio of 4g / L, filter and wash after 24 hours, and add tetra-n-butylammonium hydroxide to the filter cake at a ratio of 0.4g / L to stir for 24 hours, and then / min high-speed centrifuge for 10 minutes, the upper liquid is titanium dioxide doped europium nanosheet transparen...

Embodiment 2

[0025] a. Wash 10g of metatitanic acid several times with distilled water, put it in an oven and dry it at 60°C for 12 hours, take 0.1g of europium trioxide (Eu 2 o 3 ) was dissolved in 1.6ml of 1mol / l nitric acid to obtain europium ions.

[0026] b. Mix 10g H 2 TiO 3 with 13.8K 2 CO 3 Mix evenly, add 1.6ml of europium ions prepared in a to the mixture, at this time, the mass fraction of europium in titanium is 1%, add 5ml of absolute ethanol, and grind thoroughly.

[0027] c. Put the mixture in b in a muffle furnace and react at 800°C for 8 hours.

[0028] d. Take out the calcined material, add 1mol / L hydrochloric acid at a ratio of 4g / L and stir, filter and wash after 36 hours, add ethylenediamine to the filter cake at a ratio of 0.4g / L and stir for 36 hours, and then stir at 10000r / min Centrifuge in a high-speed centrifuge to obtain the supernatant which is the corresponding titanium dioxide-doped europium nanosheet transparent sol.

Embodiment 3

[0030] a, the 10 metatitanic acid (H 2 TiO 3 ) was washed with distilled water several times, put in an oven and baked at 60°C for 12 hours, and 0.3g of europium trioxide (Eu 2 o 3 ) was dissolved in 4.8ml of 1mol / l nitric acid to obtain europium ions.

[0031] b. Mix 10g H 2 TiO 3 with 13.8gK 2 CO 3 Mix evenly, add 4.8ml of europium ion prepared in a to the mixture, at this time, europium accounts for 3% of the mass fraction of titanium, add 5ml of absolute ethanol, and grind thoroughly.

[0032] c. Put the mixture in b in a muffle furnace and react at 800°C for 12 hours.

[0033] d. Take out the calcined material, add 1mol / L hydrochloric acid at a ratio of 4g / L and stir, filter and wash after 72 hours, add tetra-n-butylammonium hydroxide and stir at a ratio of 0.4g / L for the filter cake for 72 hours, and then / min high-speed centrifuge to obtain the corresponding transparent sol of titanium dioxide doped europium nanosheets.

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Abstract

The invention discloses a preparation method of titanium dioxide europium-doped nano-film sol. In the method, metatitanic acid (H2TiO3) is washed by distilled water repeatedly, and put into an oven to be baked for 12 hours at 60 DEG C; europium sesquioxide (Eu2O3) is dissolved in nitric acid to obtain europium ion; H2Ti3 and K2CO3 are evenly mixed according to mol ratio of 5.2:1, europium ion is added into the mixture according to 0.2-3% of mass fraction of titanium, and little absolute ethyl alcohol is added into the mixture simultaneously, the mixture being fully ground is put in a muffle to be calcined for 6-15 hours at 600-1000 DEG C, the material being calcined is taken out and added into hydrochloric acid of 1mol / L according to the proportion of 4g / L to be stirred, filtration washing is carried out for 24-72 hours, the filter cake is added into 4-n-butyl ammonium hydroxide or ethylene dimine according to the proportion of 0.4g / L to be stirred for 24-72 hours, is then centrifugated at the high speed centrifugation of 10000r / min to obtain titanium dioxide europium-doped nano-film sol. The invention is convenient in operation, low in cost and suitable for industrialized prosuction.

Description

technical field [0001] The present invention relates to the preparation of nano-sheets, specifically, titanium dioxide doped with europium (TiO 2 :Eu 3+ ) method of nanosheet sol. Background technique [0002] TiO 2 Its chemical properties are stable, insoluble, non-toxic, and low in cost. It has aroused widespread interest among scientific researchers in terms of solar energy conversion and storage, and degradation of harmful complex organic matter. It is an ideal photocatalyst, but because of its wide band gap (3.2eV), it needs near-ultraviolet light (387.5nm) to excite and generate electron-hole pairs. In the solar spectrum, the part with the highest light intensity is around 500nm In the green light region, the ultraviolet and near-ultraviolet parts only account for about 5% of the total light energy, which leads to a low utilization rate of sunlight. Therefore, the key technology to improve the efficiency of solar energy utilization is to improve TiO 2 The bandgap w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/08
Inventor 李强褚晶宋杰李彩霞张娜
Owner EAST CHINA NORMAL UNIV
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