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Titanium dioxide/polyaniline photocatalyst with 3D pattern structure and preparation method of titanium dioxide/polyaniline photocatalyst

A titanium dioxide and polyaniline light technology, which is applied in the field of photocatalyst preparation, can solve the problems of complex operation, secondary pollution and high cost in the semiconductor compounding process, and achieve the effects of improving light energy conversion efficiency, saving energy and low cost.

Inactive Publication Date: 2014-10-08
JILIN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0008] However, currently for improving TiO 2 There are certain defects and deficiencies in the methods and technologies of photocatalytic efficiency
High cost: Although the method of using noble metal deposition broadens the spectral response range of the catalyst, the cost is high and it is not suitable for promotion in practical applications; it is easy to cause secondary pollution: excessive metal doping will cause failure in the photocatalytic reaction process Avoid secondary pollution; in addition, the semiconductor recombination process is complex and limited in practical applications

Method used

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  • Titanium dioxide/polyaniline photocatalyst with 3D pattern structure and preparation method of titanium dioxide/polyaniline photocatalyst
  • Titanium dioxide/polyaniline photocatalyst with 3D pattern structure and preparation method of titanium dioxide/polyaniline photocatalyst
  • Titanium dioxide/polyaniline photocatalyst with 3D pattern structure and preparation method of titanium dioxide/polyaniline photocatalyst

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preparation example Construction

[0034] The preparation method of 3D flower structure titanium dioxide / polyaniline photocatalyst comprises the following steps:

[0035] A. Disperse under ultrasonic conditions for 30 minutes according to the dispersion ratio of carbon spheres 0.1gC / 50mL absolute ethanol to obtain A solution;

[0036] B. Add tetrabutyl tertanoate TBOT into solution A according to the mass ratio of 0.1gC / 2mLTBOT, and stir magnetically for 1 hour to obtain solution B;

[0037] C. According to the volume ratio of 50mL alcohol / 60mL water, add distilled water dropwise to B at a rate of 60 drops / min, then stir at room temperature for 12 hours to obtain C solution;

[0038] D. Centrifuge the C solution at a speed of 7000-7300r / min for 6 minutes, wash with distilled water and then ethanol, repeat the washing and separation for 3 times, and dry at 70°C-80°C for 12h to obtain brown powder D;

[0039] E. Calcining powder D at 500°C for 5 hours to obtain white hollow titanium dioxide nanoparticles HT-500;...

Embodiment 1

[0047] A. Take 0.1g of carbon spheres, disperse in 50mL of absolute ethanol solution, and disperse under ultrasonic conditions for 30min, to obtain A solution;

[0048] B. Take 2mL of tetrabutyl TBOT and add it into the A solution, and stir it magnetically for 1 hour to obtain the B solution;

[0049] C. Add 60 mL of distilled water dropwise to solution B at a rate of 60 drops / min, then stir at room temperature for 12 hours to obtain solution C;

[0050] D. Centrifuge the C solution at a speed of 7000r / min for 6min, wash and separate it three times with distilled water and ethanol, and dry it at 70°C to obtain a brown powder D;

[0051] E. Calcining powder D at 500°C for 5 hours to obtain white hollow titanium dioxide nanoparticles HT-500;

[0052] F. Weigh 0.05g HT-500 and disperse it in 20mL absolute ethanol, and disperse it under ultrasonic conditions for 30min to obtain solution E;

[0053] G. Measure 0.05mL ANI and disperse it into 10mL HCl (1mol / L), stir magnetically f...

Embodiment 2

[0060] A. Take 0.1g of carbon spheres, disperse in 50mL of absolute ethanol solution, and disperse under ultrasonic conditions for 30min, to obtain A solution;

[0061] B. Take 2mLTBOT and add it to the A solution, and stir it magnetically for 1 hour to obtain the B solution;

[0062] C. Add 60 mL of distilled water dropwise to solution B at a rate of 60 drops / min, then stir at room temperature for 12 hours to obtain solution C;

[0063] D. The C solution was centrifuged at a speed of 7100r / min for 6min, washed and separated with distilled water and ethanol repeatedly for 3 times, and dried at 75°C to obtain a brown powder D;

[0064] E. Calcining powder D at 500°C for 5 hours to obtain white hollow titanium dioxide nanoparticles HT-500;

[0065] F. Weigh 0.1g HT-500 and disperse in 40mL of absolute ethanol, and disperse under ultrasonic conditions for 30min to obtain solution E;

[0066] G. Measure 0.05mL ANI and disperse it into 10mL HCl (1mol / L), stir magnetically for 1h ...

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Abstract

The invention relates to a titanium dioxide / polyaniline photocatalyst with a 3D pattern structure and a preparation method of the titanium dioxide / polyaniline photocatalyst. The preparation method comprises the steps of dispersing carbon balls in absolute ethyl alcohol, adding TBOT, dropping distilled water, centrifugally separating, and drying to obtain brown powder; calcining the brown powder to obtain hollow titanium dioxide nanometer particles, dispersing the hollow titanium dioxide nanometer particles in the absolute ethyl alcohol, dispersing ANI (aniline) in hydrochloric acid, agitating in an ice-water bath to obtain a deep green suspension; and centrifugally separating, and drying to obtain a deep green TiO2 / polyaniline (PANI) compound photocatalyst. Polyaniline is used as a sensitizer for modifying titanium dioxide, the operation is simple, reaction conditions are mild and the cost is low. Light is repeatedly refracted and absorbed by using polyaniline nanometer sheets which are mutually meshed, and thus full utilization on solar light is realized, the specific surface area of a composite material can be increased by the polyaniline nanometer sheets, more active sites are provided for light-catalyzed reaction, the light energy conversion efficiency and the photo-catalysis efficiency are improved, the PANI is high in absorption coefficient in a visible light region, and azo-dyes, namely MO and CR, can be directly degraded by using solar light.

Description

Technical field: [0001] The invention relates to a preparation method of a photocatalyst that efficiently utilizes sunlight energy, in particular to a composite photocatalyst and a preparation method of a 3D flower structure titanium dioxide / polyaniline that efficiently utilizes sunlight energy. Background technique: [0002] Water pollution has become one of the most serious problems facing the society, especially organic azo dyes, which seriously endanger people's lives and health due to their high toxicity and refractory degradation. Therefore, the international community and researchers are constantly looking for more efficient, economical and cleaner materials to remove these pollutants. In recent years, semiconductor photocatalytic technology has attracted the favor and attention of researchers due to its advantages of high efficiency, non-selectivity, easy operation, and no secondary pollution. [0003] Photocatalytic technology is to use semiconductors to be excited...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J35/02
Inventor 甘树才郭娜季桂娟梁艺迈李琳琳刘璐张军军
Owner JILIN UNIV
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