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Method for preparing iron-doped graphene oxide titanium oxide nanocomposite modified micro-filtration membrane

A nanocomposite material, titanium dioxide technology, applied in the field of photocatalytic materials, can solve the problem of low photocatalytic activity, achieve high photocatalytic activity, reduce water contact angle, and reduce loss

Inactive Publication Date: 2019-05-28
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, using TiO alone 2 The photocatalytic activity of the fabricated photocatalytic film under sunlight is very low

Method used

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  • Method for preparing iron-doped graphene oxide titanium oxide nanocomposite modified micro-filtration membrane
  • Method for preparing iron-doped graphene oxide titanium oxide nanocomposite modified micro-filtration membrane

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Embodiment 1

[0028] The preparation method of the iron-doped graphene oxide titanium dioxide nanocomposite material modified microfiltration membrane of the present embodiment is as follows:

[0029] (1) GO nanosheets were synthesized by graphite-modified Hummers method. The synthesis process involves adding graphite in KMnO 4 , H 2 SO 4 and NaNO 3 Oxidation in the mixture, the mixture was filtered to collect the solid particles (i.e., graphite oxide), the solids were washed in deionized water by three cycles of resuspension and centrifugation to remove chemical residues, and the GO particle suspension was sonicated using an ultrasonic cleaner to remove the oxidized particles. Graphite was exfoliated into GO nanosheets, and finally any unexfoliated graphite residue was removed by centrifugation to obtain a pure GO nanosheet suspension, which was freeze-dried to obtain GO powder;

[0030] (2) Preparation of Fe-TiO by sol-gel method 2 nanoparticles. First, 10 mL of tetrabutyl titanate ...

Embodiment 2

[0037] (1) GO nanosheets were synthesized by graphite-modified Hummers method. The synthesis process involves adding graphite in KMnO 4 , H 2 SO 4 and NaNO 3 Oxidation in the mixture, the mixture was filtered to collect the solid particles (i.e., graphite oxide), the solids were washed in deionized water by three cycles of resuspension and centrifugation to remove chemical residues, and the GO particle suspension was sonicated using an ultrasonic cleaner to remove the oxidized particles. Graphite was exfoliated into GO nanosheets, and finally any unexfoliated graphite residue was removed by centrifugation to obtain a pure GO nanosheet suspension, which was freeze-dried to obtain GO powder;

[0038] (2) Preparation of Fe-TiO by sol-gel method 2 nanoparticles. First, 10 mL of tetrabutyl titanate was added to 20 mL of absolute ethanol to form solution A. Solution B is the addition of FeCl 3 A mixture of 10 mL of absolute ethanol, 15 mL of deionized water and 4.5 mL of acet...

Embodiment 3

[0043] (1) GO nanosheets were synthesized by graphite-modified Hummers method. The synthesis process involves adding graphite in KMnO 4 , H 2 SO 4 and NaNO 3 Oxidation in the mixture, the mixture was filtered to collect the solid particles (i.e., graphite oxide), the solids were washed in deionized water by three cycles of resuspension and centrifugation to remove chemical residues, and the GO particle suspension was sonicated using an ultrasonic cleaner to remove the oxidized particles. Graphite was exfoliated into GO nanosheets, and finally any unexfoliated graphite residue was removed by centrifugation to obtain a pure GO nanosheet suspension, which was freeze-dried to obtain GO powder;

[0044] (2) Preparation of Fe-TiO by sol-gel method 2 nanoparticles. First, 10 mL of tetrabutyl titanate was added to 20 mL of absolute ethanol to form solution A. Solution B is the addition of FeCl 3 A mixture of 10 mL of absolute ethanol, 15 mL of deionized water and 4.5 mL of acet...

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Abstract

The invention belongs to the technical field of photocatalytic materials, and particularly relates to a method for preparing an iron-doped graphene oxide titanium oxide nanocomposite modified micro-filtration membrane. GO nanosheets are synthesized through a modification Hummers method, Fe-doped TiO2 nanoparticles are prepared through a sol-gel method and high-temperature calcination, then the GOnanosheets and the Fe-doped TiO2 nanoparticles are mixed with a certain proportion through ultrasonic treatment, a blended solution is prepared through a hydrothermal method, and finally through centrifugation, washing and drying, the iron-doped graphene oxide titanium oxide nanocomposite modified micro-filtration membrane is prepared. The prepared micro-filtration membrane can utilize visible light for photocatalytic degradation, and is high in photocatalytic activity.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a method for modifying a microfiltration membrane by an iron-doped graphene oxide titanium dioxide nanocomposite material. Background technique [0002] Titanium dioxide (TiO 2 ) is the most commonly used photocatalyst in water treatment. In addition to the common characteristics of nanomaterials, TiO 2 It also has superhydrophilicity, strong surface activity, ultraviolet absorption, high-efficiency photocatalytic activity and so on. TiO 2 It can completely decompose organic pollutants (such as organic dyes, toxic micro-pollutants, oil) into carbon dioxide and water. It has been found that TiO 2 Incorporation of nanoparticles into water filtration membranes enhances their flux, pollutant removal and antifouling properties. However, using TiO alone 2 The photocatalytic activity of the fabricated photocatalytic film under sunlight is very low. Th...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D67/00B01D61/14B01D69/12B01J31/38B01J21/06
Inventor 高永李婷婷周俊我傅小飞张曼莹刘芳
Owner JIANGSU UNIV OF TECH
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