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Er<3+>:YAlO3/TiO2-loaded photocatalyst and preparation method thereof

A photocatalyst and load-type technology, which is applied in the field of load-type photocatalyst preparation, can solve the problems of reduced oxidation capacity, high energy consumption, and reduced hole oxidation potential, so as to save energy and reduce the cost of use

Inactive Publication Date: 2011-06-01
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are two types of existing photocatalysts, one is unmodified TiO 2 , must be excited by ultraviolet light to catalyze and oxidize organic pollutants. Although the treatment efficiency is high, due to the use of ultraviolet light excitation, the energy consumption is high; the other is modified TiO 2 , can be excited under visible light radiation, but the oxidation potential of the resulting holes is reduced, that is, the oxidation ability is reduced

Method used

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Examples

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Effect test

preparation example Construction

[0030] load type Er 3+ :YAlO 3 ·TiO 2 The preparation method of photocatalyst comprises following sequence and steps:

[0031] a. 97% pure Ti(OC 4 h 9 ) 4 The solution was added dropwise at a speed of 150 drops / min to C with a purity of 99.5%. 2 h 5 OH solution with continuous stirring, the volume ratio of the two is 2:3, after the dropwise addition is completed, the mixed solution is continuously stirred at room temperature for 30 minutes, and the prepared solution is named A solution;

[0032] b. C with a purity of 99.5% 2 h 5 OH and CH 3 COOH and H 2 O The three liquids are mixed according to the volume ratio of 19:5:3, and C with a purity of 99.5% 2 h 5 OH consumption is equal to consumption in step a, then 1-1.5gEr 3+ :YAlO 3 Add to 100mL mixed solution, stir at room temperature for 30 minutes to prepare B solution;

[0033] c. Add solution B dropwise to solution A at a rate of 150 drops / minute, and stir the mixture at 40°C for 48 hours to make Ti(OC 4 h ...

Embodiment 1

[0043] a. Take 97% pure Ti(OC 4 h 9 ) 4 25ml of the solution was added dropwise to 75ml of C with a purity of 99.5% at a rate of 150 drops / minute 2 h 5 OH solution, and kept stirring, after the dropwise addition was completed, the mixed solution was kept stirring at room temperature for 30 minutes, and the prepared solution was named A solution;

[0044] b. Take 75ml of C with a purity of 99.5% 2 h 5 OH with 17mlCH 3 COOH and 8mlH 2 O mixed, followed by 1g Er 3+ :YAlO 3 Add to 100mL mixed solution, stir at room temperature for 30 minutes to prepare B solution;

[0045] c. Add solution B dropwise to solution A at a rate of 150 drops / minute, and stir the mixture at 40°C for 48 hours to make Ti(OC 4 h 9 ) 4 Hydrolyzed, and in Er 3+ :YAlO 3 Precipitation after the formation of titanium gel on the particle surface;

[0046] d. Take out the precipitate that forms a titanium gel on the surface, dry it at 110 degrees Celsius for 24 hours to obtain precipitate particles,...

Embodiment 2

[0051] a. Take 97% pure Ti(OC 4 h 9 ) 4 25ml of the solution was added dropwise to 75ml of C with a purity of 99.5% at a rate of 150 drops / minute 2 h 5 OH solution, and kept stirring, after the dropwise addition was completed, the mixed solution was kept stirring at room temperature for 30 minutes, and the prepared solution was named A solution;

[0052] b. Take 75ml of C with a purity of 99.5% 2 h 5 OH with 17mlCH 3 COOH and 8mlH 2 O mixed, followed by 11g Er 3+ :YAlO 3 Add to 100mL mixed solution, stir at room temperature for 30 minutes to prepare B solution;

[0053] c. Add solution B dropwise to solution A at a rate of 150 drops / minute, and stir the mixture at 40°C for 48 hours to make Ti(OC 4 h 9 ) 4 Hydrolyzed, and in Er 3+ :YAlO 3 Precipitation after the formation of titanium gel on the particle surface;

[0054] d. Take out the precipitate that forms a titanium gel on the surface, dry it at 110 degrees Celsius for 24 hours to obtain precipitate particles...

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Abstract

The invention relates to an Er<3+>:YAlO3 / TiO2-loaded photocatalyst and a preparation method thereof. The catalyst comprises the main components of Er<3+>:YAlO3, TiO2 and active carbon, wherein the Er<3+>:YAlO3 powder and TiO2 powder are loaded to the surface of the spherical active carbon, and the mass ratio of the Er<3+>: YAlO3 powder to the TiO2 powder is 1:4. A combination mode comprises the following steps of firstly dispersing Er<3+>:YAlO3 and TiO2 in the molar ratio of 1: 5 into anhydrous ethyl alcohol; then adding the active carbon to the anhydrous ethyl alcohol in the mass ratio of 1:4; magnetically stirring for 30min; and then drying out of sun at 80 DEG C to obtain a final product. In the invention, an up-conversion luminescence agent Er<3+>:YAlO3 containing the rare earth Er is selected to be doped into the TiO2 powder, a mixture of the up-conversion luminescence agent Er<3+>:YAlO3 and the TiO2 powder is loaded on the surface of the spherical active carbon to degrade organic pollutants in the irradiation of visible light. The Er<3+>:YAlO3 / TiO2-loaded photocatalyst achieves the purpose of treating wastewater by utilizing the visible light, greatly saves energy sources, gives full play to TiO2 catalytic activity, is convenient to be naturally separated from treated water at the same time and reduces the utilization cost.

Description

Technical field: [0001] The invention relates to a method for preparing a loaded photocatalyst for oxidizing and degrading organic pollutants in liquid or flowing liquid. Background technique: [0002] With the development of the industrial process, people's living conditions have undergone earth-shaking changes, and the living standard has been greatly improved, but at the same time, it has also brought destructive effects on the environment on which people live. Every year, a large amount of toxic wastewater containing carcinogens such as benzene rings, amine groups, and azo groups is continuously discharged into rivers, lakes and seas, which not only poses a great threat to our human health, but also poses a threat to the survival of other organisms. had a great impact. In the post-processing of dye synthesis and in the process of printing and dyeing, dyes cannot be fully and effectively utilized. Therefore, industries such as production, textile printing and dyeing, and...

Claims

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Application Information

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IPC IPC(8): B01J23/10B01J21/04B01J21/06B01J21/18B01J37/02C02F1/30C02F1/72
CPCY02W10/37
Inventor 董双石周丹丹张凤君邹东雷
Owner JILIN UNIV
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