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Preparation method of graphene oxide wrapped titania microsphere photocatalyst

A technology of graphene wrapping and titanium dioxide, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of wide band gap and limited application, and achieve easy operation, low energy consumption, high efficiency effect

Inactive Publication Date: 2013-09-11
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of graphene oxide-wrapped titanium dioxide microsphere photocatalyst, which solves the problem that the existing microsphere photocatalyst material has a wide gap leading to limited application

Method used

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  • Preparation method of graphene oxide wrapped titania microsphere photocatalyst
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  • Preparation method of graphene oxide wrapped titania microsphere photocatalyst

Examples

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Embodiment 1

[0036]Add 115mL of 98% concentrated sulfuric acid into a dry beaker, cool to about 0°C, add 5g of natural flake graphite, 5g of sodium nitrate, and 15g of potassium permanganate in sequence while stirring. Control the reaction temperature at 10-30°C, stir for 3 hours, then place the beaker of the above solution in a constant temperature water bath at about 35°C, and continue stirring for 30 minutes when the reaction temperature rises to about 35°C. Finally, control the reaction temperature within 100°C, add deionized water dropwise, and continue to stir for 30 minutes, with a dropping rate of 0.3-0.5mL / s. Finally, a mixed solution consisting of an appropriate amount of 30% hydrogen peroxide and 50 mL of deionized water was added. The ratio of hydrogen peroxide and deionized water added is 1:5. Centrifuge and wash with water while hot to obtain a yellow-brown mud. Dry the above mud, weigh 0.2 g and disperse it in deionized water, then continue to sonicate for 3 hours, and fin...

Embodiment 2

[0038] Add 115mL of 98% concentrated sulfuric acid into a dry beaker, cool to about 0°C, add 5g of natural flake graphite, 5g of sodium nitrate, and 15g of potassium permanganate in sequence while stirring. Control the reaction temperature at 10-30°C, stir for 3 hours, then place the beaker of the above solution in a constant temperature water bath at about 35°C, and continue stirring for 30 minutes until the reaction temperature rises to about 35°C. Finally, control the reaction temperature within 100°C, add deionized water dropwise, and continue to stir for 30 minutes, with a dropping rate of 0.3-0.5mL / s. Finally, a mixed solution consisting of an appropriate amount of 30% hydrogen peroxide and 50 mL of deionized water was added. The ratio of hydrogen peroxide and deionized water added is 1:1. Centrifuge and wash with water while hot to obtain a yellow-brown mud. Dry the above mud, weigh 0.2 g and disperse it in deionized water, then continue to sonicate for 3 hours, and f...

Embodiment 3

[0040] Add 115mL of 98% concentrated sulfuric acid into a dry beaker, cool to about 0°C, add 5g of natural flake graphite, 5g of sodium nitrate, and 15g of potassium permanganate in sequence while stirring. Control the reaction temperature at 10-30°C, stir for 3 hours, then place the beaker of the above solution in a constant temperature water bath at about 35°C, and continue stirring for 30 minutes when the reaction temperature rises to about 35°C. Finally, control the reaction temperature within 100°C, add deionized water dropwise, and continue to stir for 30 minutes, with a dropping rate of 0.3-0.5mL / sec. Finally, a mixed solution consisting of an appropriate amount of 30% hydrogen peroxide and 50 mL of deionized water was added. The ratio of hydrogen peroxide and deionized water added is 1:10. Centrifuge and wash with water while hot to obtain a yellow-brown mud. Dry the above mud, weigh 0.2 g and disperse it in deionized water, then continue to sonicate for 3 hours, and...

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Abstract

The invention discloses a preparation method of a graphene oxide wrapped titania microsphere photocatalyst. By utilizing organic groups enriched on the surfaces of a titania microsphere and graphene, the prepared monodisperse titania microsphere interacts with a graphene oxide solution according to the esterification condensation reaction bonding principle under a definite condition, so that the graphene wrapped titania microsphere photocatalyst is prepared. According to the method, the graphene oxide and the titania are stably combined together. The method has the advantages of short experimental period, convenience for operation, rapid synthesizing speed, high efficiency and low in energy consumption. Therefore, the method can be applied to the industrial production.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and relates to a preparation method of a graphene oxide-wrapped titanium dioxide microsphere material, in particular to a preparation method of a graphene oxide-wrapped titanium dioxide microsphere photocatalyst. Background technique [0002] Nanoscale TiO 2 In recent years, it has attracted a lot of attention and is widely used in the fields of photocatalytic materials, solar cells, gas sensors and optoelectronic devices. For photocatalytic research, TiO 2 The photocatalytic ability depends on its crystal form, grain size and degree of crystallization. Relatively speaking, the nano-TiO of anatase phase with higher crystallinity and smaller grain size 2 exhibit better photocatalytic performance. Electron-hole recombination, photon scattering, etc. will affect TiO 2 Ultimate photon utilization efficiency. [0003] Graphene has good thermal conductivity [3000W / (m K)], hi...

Claims

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Application Information

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IPC IPC(8): B01J21/18B01J35/08
Inventor 刘辉董晓楠段聪越苏兴李军奇朱振峰
Owner SHAANXI UNIV OF SCI & TECH
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