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Porous carbon loaded titanium dioxide composite manufactured by utilizing ionic liquid/polyaniline and method and application thereof

A technology of titanium dioxide and composite materials, applied in separation methods, chemical instruments and methods, catalysts for physical/chemical processes, etc., to achieve the effects of large light absorption capacity, small particle size, and excellent adsorption performance

Inactive Publication Date: 2013-10-16
SICHUAN AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of preparing special morphology and functional titanium dioxide by blending polyaniline and ionic liquid has not been reported yet

Method used

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  • Porous carbon loaded titanium dioxide composite manufactured by utilizing ionic liquid/polyaniline and method and application thereof
  • Porous carbon loaded titanium dioxide composite manufactured by utilizing ionic liquid/polyaniline and method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: The preparation method of the porous carbon-loaded titanium dioxide composite material that ionic liquid polyaniline participates in preparation comprises the following steps:

[0023] (1) Titanium dioxide sol was prepared by sol-gel method. After the sol was stirred for 15 minutes, 1.5wt% ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate and 0.1wt% aniline were added to the sol. , stirred for 15 minutes, and mixed evenly;

[0024] (2) Take ammonium persulfate accounting for 0.2wt% of the sol, prepare a hydrochloric acid solution with a concentration of 0.2wt%, and add it dropwise to the above sol mixture to initiate aniline polymerization. Continue to stir for 2h after the dropwise addition;

[0025] (3) Leave the sol to age for 3 days and then dry it in an oven at 60°C;

[0026] (4) After milling, the obtained composite was calcined at 800° C. for 1 h in a nitrogen atmosphere to carbonize the polyaniline to obtain a porous carbon-supported tit...

Embodiment 2

[0028] Embodiment 2: the preparation method of the porous carbon supported titanium dioxide composite material that ionic liquid polyaniline participates in preparation, comprises the following steps:

[0029] (1) Titanium dioxide sol was prepared by sol-gel method. After the sol was stirred for 20 minutes, 3.0wt% ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate and 0.6wt% aniline were added to the sol. , stirred for 20 minutes, and mixed evenly;

[0030] (2) Take ammonium persulfate accounting for 0.8wt% of the sol, prepare a hydrochloric acid solution with a concentration of 0.4wt%, and add it dropwise to the above sol mixture to initiate aniline polymerization. Continue to stir for 2h after the dropwise addition;

[0031] (3) Leave the sol to age for 3 days and then dry it in an oven at 60°C;

[0032] (4) After grinding, the obtained composite was calcined in a nitrogen atmosphere at 700°C for 1 h to carbonize the polyaniline to form a porous carbon-supported ti...

Embodiment 3

[0036] Embodiment 3: the preparation method of the porous carbon supported titanium dioxide composite material that ionic liquid polyaniline participates in preparation, comprises the following steps:

[0037] (1) Prepare titanium dioxide sol by sol-gel method. After stirring the sol for 20 minutes, add 3.0wt% ionic liquid 1-ethylpyridine tetrafluoroborate and 0.2wt% aniline to it, stir for 20 minutes, and mix uniform;

[0038] (2) Take ammonium persulfate accounting for 0.3wt% of the sol, prepare a hydrochloric acid solution with a concentration of 0.6wt%, and add it dropwise to the above sol mixture to initiate aniline polymerization. Continue to stir for 2h after the dropwise addition;

[0039] (3) Leave the sol to age for 3 days and then dry it in an oven at 80°C;

[0040] (4) After milling, the obtained composite was calcined in a nitrogen atmosphere at 600°C for 1 h to carbonize the polyaniline to obtain a porous carbon-supported titanium dioxide composite material.

...

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Abstract

The invention discloses a porous carbon loaded titanium dioxide composite manufactured by utilizing ionic liquid / polyaniline and a method and an application thereof. The method comprises the following steps: preparing titanium dioxide collosol by using a sol-gel method, adding ionic liquid making up 1.0 wt%-8.0 wt%, and aniline making up 0.1 wt%-10.0 wt% of the collosol to the collosol, mixing uniformly, and adding oxidant to trigger the polymerization of aniline; still standing and ageing the collosol for 3-5 days, placing the collosol to a drying oven to dry at the temperature of 60-120 DEG C; calcining the obtained compound after milling in nitrogen atmosphere at the temperature of 450-850 DEG C for 30 min-2 h to allow polyaniline to be carbonized, so as to obtain the porous carbon loaded titanium dioxide composite. With the assist of ionic liquid, titanium dioxide and polyaniline are synthesized synchronously, and form a mutually cross-linked and penetrated special structure; the calcination in nitrogen atmosphere allows the polyaniline to be carbonized and titanium dioxide to sediment on a polymer residual carbon frame, and simultaneously realizes the nonmetal adulteration for titanium dioxide. The composite material manufactured by the method has stronger light absorption ability both in ultraviolet and visible light areas, and excellent photocatalysis property and well adsorptive property both in ultraviolet and visible light.

Description

technical field [0001] The invention relates to a porous carbon-loaded titanium dioxide composite material prepared by using ionic liquid / polyaniline, a preparation method and application thereof. Background technique [0002] Titanium dioxide is a photocatalyst with high efficiency, non-toxicity, stable chemical properties, strong photooxidation resistance and low price. Titanium dioxide photocatalysis / photoelectrocatalysis technology has attracted extensive attention in the application of toxic and biodegradable organic wastewater and waste gas treatment. The degradation efficiency of nano titanium dioxide is high, but the photocatalytic reaction can only be carried out under the irradiation of ultraviolet light, and the separation rate of photogenerated electrons and holes still needs to be improved. In order to improve the photocatalytic performance of titanium dioxide under visible light, the preparation of titanium dioxide composite materials has become one of the key...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F1/30B01D53/86B01J21/18
CPCY02W10/37
Inventor 张延宗周帷吴凌姗钟建丹邓仕槐沈飞李黎肖鸿王莉淋李远伟
Owner SICHUAN AGRI UNIV
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