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Preparation method of graphene-based magnetic composite visible light catalysis material Fe3O4-G-TiO2

A fe3o4-g-tio2, catalytic material technology, applied in the direction of light water/sewage treatment, etc., can solve the problems of magnetic high-efficiency photocatalysts that have not been reported, and achieve the effects of inhibiting recombination rate, improving catalytic efficiency, and reducing band gap energy

Inactive Publication Date: 2013-04-03
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Already have Fe 3 o 4 -G and G-TiO 2 The preparation of composite materials, but the magnetic and efficient photocatalysts synthesized by three materials have not been reported

Method used

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  • Preparation method of graphene-based magnetic composite visible light catalysis material Fe3O4-G-TiO2
  • Preparation method of graphene-based magnetic composite visible light catalysis material Fe3O4-G-TiO2
  • Preparation method of graphene-based magnetic composite visible light catalysis material Fe3O4-G-TiO2

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Disperse 8g of pre-oxidized graphite powder in 180ml of concentrated sulfuric acid cooled to 0°C, and stir for 1h; then slowly add 24g of potassium permanganate into the above solution, and use an ice bath to keep the solution temperature below After stirring for 1 hour at 10°C, adjust the temperature to 35°C and react for 4 hours; then slowly add 360ml of water and stir for 30 minutes; then add 1L of water to terminate the reaction, and add 40ml of 30% hydrogen peroxide to remove excess potassium permanganate, and stir at room temperature After 30 minutes, the solution turned bright yellow; left for 24 hours, finally washed 3-5 times with 10% hydrochloric acid and water, and dried for 48 hours with a freeze dryer to obtain graphene oxide;

[0026] (2) Ultrasonic disperse the prepared 0.2g graphene oxide in 80ml ethylene glycol, 1.6g FeCl 3 ·6H 2 O and 3.2g NaAc were dissolved in the above liquid at room temperature and stirred for 30min. Afterwards, the mixed sol...

Embodiment 2

[0029] (1) Disperse 8g of pre-oxidized graphite powder in 180ml of concentrated sulfuric acid cooled to 0°C, and stir for 1h; then slowly add 24g of potassium permanganate into the above solution, and use an ice bath to keep the solution temperature below After stirring for 1 hour at 10°C, adjust the temperature to 35°C and react for 4 hours; then slowly add 360ml of water and stir for 30 minutes; then add 1L of water to terminate the reaction, and add 40ml of 30% hydrogen peroxide to remove excess potassium permanganate, and stir at room temperature After 30 minutes, the solution turned bright yellow; left for 24 hours, finally washed 3-5 times with 10% hydrochloric acid and water, and dried for 48 hours with a freeze dryer to obtain graphene oxide;

[0030] (2) Ultrasonic disperse the prepared 0.2g graphene oxide in 80ml ethylene glycol, 1.6g FeCl 3 ·6H 2 O and 3.2g NaAc were dissolved in the above liquid at room temperature and stirred for 30min. Afterwards, the mixed sol...

Embodiment 3

[0033] (1) Disperse 8g of pre-oxidized graphite powder in 180ml of concentrated sulfuric acid cooled to 0°C, and stir for 1h; then slowly add 24g of potassium permanganate into the above solution, and use an ice bath to keep the solution temperature below After stirring for 1 hour at 10°C, adjust the temperature to 35°C and react for 4 hours; then slowly add 360ml of water and stir for 30 minutes; then add 1L of water to terminate the reaction, and add 40ml of 30% hydrogen peroxide to remove excess potassium permanganate, and stir at room temperature After 30 minutes, the solution turned bright yellow; left for 24 hours, finally washed 3-5 times with 10% hydrochloric acid and water, and dried for 48 hours with a freeze dryer to obtain graphene oxide;

[0034] (2) Ultrasonic disperse the prepared 0.2g graphene oxide in 80ml ethylene glycol, 1.6g FeCl 3 ·6H 2 O and 3.2g NaAc were dissolved in the above liquid at room temperature and stirred for 30min. Afterwards, the mixed sol...

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Abstract

The invention relates to a preparation method of graphene-based magnetic composite visible light catalysis material Fe3O4-G-TiO2. According to the preparation method, low-cost graphite powder, FeCl3.6H2O and commercial TiO2 as precursors, and the novel high-efficiency nano magnetic photochemical catalysis composite material with different load rates can be prepared at different temperatures, not only has extremely high photochemical catalysis efficiency under visible light, but also can be effectively separated from a water body, and can be reutilized for multiple times. The preparation method of the method has the advantages that the implementation is simple and easy, the influencing factors are few, the stability is good, the catalysis efficiency is high, and the like.

Description

technical field [0001] The invention is used in the application field of water treatment technology, and specifically relates to a graphene (G)-based magnetic composite visible light catalytic material Fe 3 o 4 -G-TiO 2 method of preparation. Background technique [0002] How to improve the utilization rate of sunlight by photocatalytic materials has become a research hotspot in recent years. Among the sunlight reaching the earth, the light energy of visible light accounts for 46% of the total solar energy, while ultraviolet light only accounts for 5%. The bandgap energy of photocatalytic materials that can effectively absorb visible light can only be below 3.1 eV. There are two ways to realize the utilization of visible light by photocatalytic materials: one is to load or dope certain elements on the existing ultraviolet photocatalytic materials, so that the composite materials can be excited by visible light. gap energy; the second approach is to directly prepare mate...

Claims

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Application Information

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IPC IPC(8): B01J23/745C02F1/30
Inventor 周丽邓慧萍万俊力史俊苏桐
Owner TONGJI UNIV
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