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Porous titanium dioxide/graphene composite material and preparation method thereof

A technology of porous titanium dioxide and composite materials, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., to achieve the effects of increasing specific surface area, reducing recombination rate, and improving catalytic performance

Inactive Publication Date: 2014-12-24
SICHUAN AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been no reports on the preparation of special morphology titanium dioxide using polyaniline as a template

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: the preparation method of porous titania / graphene composite material, comprises the steps:

[0021] (1) Under nitrogen atmosphere, add 40mL dodecylbenzenesulfonic acid (0.02M) and 0.10g graphene to 100mL hydrochloric acid solution (1M), add 0.2mL aniline after magnetic stirring for 1 hour, continue stirring for 1 hour, dropwise Add 0.6 g of ammonium persulfate dropwise, and react at 25° C. for 24 h.

[0022] (2) The solution in step (1) was washed several times with acetone, ethanol and deionized water successively in the form of suction filtration. Dry in a vacuum oven for 24 hours. The nano-polyaniline / graphene composite material was obtained by grinding.

[0023] (3) Titanium dioxide sol was prepared by sol-gel method, and 0.02 g of nano-polyaniline / graphene composite was added to 50 mL of sol, ultrasonicated for 10 min, and mixed evenly.

[0024] (4) The sol was left to age for 3 days and then dried in an oven at 60°C.

[0025] (5) After milling, t...

Embodiment 2

[0027] Embodiment 2: the preparation method of porous titania / graphene composite material, comprises the steps:

[0028] (1) Under nitrogen atmosphere, add 20mL dodecylbenzenesulfonic acid (0.02M) and 0.08g graphene to 50mL nitric acid solution (1M), add 0.3mL aniline after magnetic stirring for 1 hour, continue stirring for 1 hour, dropwise Add 0.8 g of ammonium persulfate dropwise, and react at 0° C. for 24 h.

[0029] (2) The solution in step (1) was washed several times with acetone, ethanol and deionized water successively in the form of suction filtration. Dry in a vacuum oven for 24 hours. The nano-polyaniline / graphene composite material was obtained by grinding.

[0030] (3) Titanium dioxide sol was prepared by sol-gel method, and 0.06g of nano-polyaniline / graphene composite material was added to 50mL of sol, ultrasonicated for 10min, and mixed evenly.

[0031] (4) Leave the sol to stand and age for 3 days, and then dry it in an oven at 80°C.

[0032] (5) After mil...

Embodiment 3

[0034] Embodiment 3: the preparation method of porous titania / graphene composite material, comprises the steps:

[0035] (1) Under nitrogen atmosphere, add 20mL dodecylbenzenesulfonic acid (0.05M) and 0.10g graphene to 60mL sulfuric acid solution (1M), add 0.2mL aniline after magnetic stirring for 1h, continue stirring for 1h, dropwise Add 0.6 g of ammonium persulfate dropwise, and react at 25° C. for 24 h.

[0036] (2) The solution in step (1) was washed several times with acetone, ethanol and deionized water successively in the form of suction filtration. Dry in a vacuum oven for 24 hours. The nano-polyaniline / graphene composite material was obtained by grinding.

[0037] (3) Titanium dioxide sol was prepared by sol-gel method, and 0.05 g of nano-polyaniline / graphene composite material was added to 50 mL of sol, ultrasonicated for 10 min, and mixed evenly.

[0038] (4) Leave the sol to stand and age for 2 days, and then dry it in an oven at 80°C.

[0039] (5) After milli...

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Abstract

The invention discloses a porous titanium dioxide / graphene composite material and a preparation method thereof. The preparation method comprises the steps of: adding aniline and graphene into a surfactant-containing protonic acid solution according to a certain ratio; preparing a nanometer polyaniline / graphene composite material through an in-situ polymerization method; preparing titanium dioxide sol by using a sol-gel method; adding 0.05-0.20g of nanometer polyaniline / graphene composite material into 50mL of sol, uniformly mixing; standing and aging the sol for 3-5 days; drying in a drying oven at the temperature of 60-120 DEG C; milling; calcining the obtained composite for 30 minutes -2 hours at the temperature of 200-550 DEG C; and removing the polyaniline, thereby obtaining the porous titanium dioxide / graphene composite material. According to the invention, the porous titanium dioxide / graphene is prepared by utilizing the nanometer polyaniline and the titanium dioxide is deposited on the graphene, so that the contact area of the titanium dioxide and pollutants is increased, the separating efficiency of photo-generated electrons and holes is improved and the photocatalytic efficiency is improved.

Description

technical field [0001] The invention relates to a preparation method of a titanium dioxide material and its application, in particular to a porous titanium dioxide / graphene composite material and its application. 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 performance of titanium dioxide, the preparation of titanium dioxide composite materials and changing its application form have becom...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/18B01J35/10
Inventor 张延宗周帷钟建丹邓琴沈飞蔺丽丽肖鸿杨刚邓仕槐伍钧
Owner SICHUAN AGRI UNIV
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