Graphene-TiO2 nanotube hydrogel, preparation method, and application thereof

A titanium dioxide and graphene technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of low cost, high energy consumption, good effect, etc. Large specific surface area, good effect

Inactive Publication Date: 2017-04-26
NANJING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of preparation method of graphene-titanium dioxide nanotube hydrogel aiming at the technical problems of high energy consumption, high cost and poor effect in the antibiotic wastewater treatment process of existing biochemical technology, which It can achieve high-efficiency physical adsorption of antibiotic wastewater, with low cost and good effect. After adding titanium dioxide nanotubes, the composite material has regeneration and photocatalytic properties

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  • Graphene-TiO2 nanotube hydrogel, preparation method, and application thereof
  • Graphene-TiO2 nanotube hydrogel, preparation method, and application thereof
  • Graphene-TiO2 nanotube hydrogel, preparation method, and application thereof

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Embodiment 1

[0049] Embodiment 1 prepares graphene-titania nanotube hydrogel

[0050] (1) adding nano-powdered graphene oxide into distilled water to prepare a 2.5 mg / mL graphene oxide aqueous solution; put the aqueous solution into an ultrasonic machine for 48 hours and undergo ultrasonic treatment to fully dissolve and completely disperse;

[0051] (2) Titanium dioxide nanotubes prepared by titanium dioxide powder (P25) have a specific surface area of ​​129.8m 2 / g, the pore diameter is 13.6nm; titanium dioxide nanotubes have high specific surface area and have adsorption properties; add titanium dioxide nanotubes to fully dissolved graphene oxide aqueous solution, the concentration of titanium dioxide is 1mg / L; ultrasonically treat the mixture for 24 hours, and mix completely ;

[0052] (3) Configure 140g / L FeSO 4 solution, adding 1mol / L HCl to adjust the pH to 3; FeSO 4 The solution must be prepared and used immediately. In order to prevent its rapid oxidation in the air, adjust the...

Embodiment 2

[0056] Embodiment 2 prepares graphene-titania nanotube hydrogel

[0057] (1) adding nano-powdered graphene oxide into distilled water to prepare a 3 mg / mL graphene oxide aqueous solution; put the aqueous solution into an ultrasonic machine for 50 hours and undergo ultrasonic treatment to fully dissolve and disperse;

[0058] (2) Titanium dioxide nanotubes prepared by titanium dioxide powder (P25) have a specific surface area of ​​129.8m 2 / g, the pore diameter is 13.6nm; titanium dioxide nanotubes have high specific surface area and have adsorption properties; add titanium dioxide nanotubes to fully dissolved graphene oxide aqueous solution, the concentration of titanium dioxide is 2mg / L; ultrasonically treat the mixture for 26 hours, and mix completely ;

[0059] (3) Configure 150g / L FeSO 4 solution, adding 1mol / L HCl to adjust the pH to 3; FeSO 4 The solution must be prepared and used immediately. In order to prevent its rapid oxidation in the air, adjust the pH value of ...

Embodiment 3

[0062] Embodiment 3 prepares graphene-titania nanotube hydrogel

[0063] (1) adding nano-powdered graphene oxide into distilled water to prepare a 2 mg / mL graphene oxide aqueous solution; put the aqueous solution into an ultrasonic machine for 45 hours and undergo ultrasonic treatment to fully dissolve and completely disperse;

[0064] (2) Titanium dioxide nanotubes prepared by titanium dioxide powder (P25) have a specific surface area of ​​129.8m 2 / g, the pore diameter is 13.6nm; titanium dioxide nanotubes have high specific surface area and have adsorption properties; add titanium dioxide nanotubes to fully dissolved graphene oxide aqueous solution, the concentration of titanium dioxide is 1.5mg / L; ultrasonically treat the mixture for 25 hours, and mix well completely;

[0065] (3) Configure 130g / L FeSO 4 solution, adding 1mol / L HCl to adjust the pH to 3; FeSO 4 The solution must be prepared and used immediately. In order to prevent its rapid oxidation in the air, adjust...

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Abstract

The invention discloses a graphene-TiO2 nanotube hydrogel, a preparation method, and an application thereof. The preparation method includes the steps of: (1) adding water to graphene oxide to fully dissolve the graphene oxide to obtain a graphene oxide water solution; (2) adding the TiO2 nanotube to the graphene oxide water solution with full stirring to prepare a graphene-TiO2 nanotube solution; (3) preparing a FeSO4 water solution; (4) adding the FeSO4 water solution to the graphene-TiO2 nanotube solution with uniform mixing to obtain a mixed liquid; (5) performing self-assembly to the mixed liquid in the step (4) under a water bath environment to obtain the graphene-TiO2 nanotube hydrogel. The preparation method is simple and employs easy-to-obtain raw materials. During synthesis, the method abides by the principle of green chemistry and is free of catalysts and toxic solvents, so that the hydrogel is toxic-free. The hydrogel can be industrially produced and can effectively remove antibiotics from waste water.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment, and in particular relates to a graphene-titanium dioxide nanotube hydrogel and a preparation method and application thereof. Background technique [0002] The production of antibiotics in our country is high. Because of the irrationality of drug use, the abuse of antibiotics has become the norm in our country, causing a large number of antibiotics to enter the environment in the form of original drugs or metabolites. General drugs are not easily soluble in water, and have a strong effect of inhibiting and killing bacteria, and are refractory to biodegradable substances. The specific sources include pharmaceutical factory production wastewater, hospital wastewater, poultry and aquaculture wastewater. In the current sewage treatment technology, biochemical treatment methods have certain disadvantages, and it is difficult to completely degrade ciprofloxacin through sewage treatment pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F1/30B01J21/06C02F103/34
CPCB01J20/20B01J20/28014B01J20/28047B01J21/063B01J35/004C02F1/283C02F2103/343
Inventor 韩永忠戴荣张进张鹏源
Owner NANJING UNIV
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