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Preparing method of tubular TiO2/reduced graphene oxide composite

A composite material, graphene technology, applied in nanotechnology for materials and surface science, titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of cumbersome, repeated washing in the preparation process, etc.

Active Publication Date: 2015-09-09
山东济清科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Chinese patent document of authorized announcement number CN 102496700 B (application number 201110429717.4) discloses a graphene-titanium dioxide nanotube composite material and its preparation method, with P25 or anatase TiO 2 As a titanium source, the composite material is prepared by the hydrothermal method, and the preparation process requires repeated washing, which is cumbersome

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  • Preparing method of tubular TiO2/reduced graphene oxide composite
  • Preparing method of tubular TiO2/reduced graphene oxide composite
  • Preparing method of tubular TiO2/reduced graphene oxide composite

Examples

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Embodiment 1

[0045] (1) Preparation of tubular TiO 2 Take 0.1000g P123 in a beaker, add 13ml ethanol, 6.5ml ethylene glycol, 6.5ml ether, stir at room temperature for 1h; add 0.5000g TiOSO 4 , stirred for 12 hours to obtain a suspension; transfer the suspension to a polytetrafluoroethylene-lined autoclave, tighten the autoclave and put it in an oven, keep it warm at 110°C for 24 hours, and heat the autoclave after hydrothermal treatment The kettle was naturally cooled to room temperature to obtain a precipitate; the obtained precipitate was centrifuged, washed with ethanol, centrifuged, dried, ground and calcined at 500°C for 4 hours to obtain a tubular TiO 2 .

[0046] (2) Prepare graphene oxide with 3g graphite powder, 30ml concentrated sulfuric acid, 3g K 2 S 2 o 8 Add to the beaker in turn, stir, ultrasonic for 5 minutes, put into a water bath, heat to 80°C and stir for 6h; slowly add distilled water to dilute to 1000ml, then filter with suction, dry at room temperature overnight...

Embodiment 2

[0050] (1) Preparation of tubular TiO 2 Take 0.1000g P123 in a beaker, add 13ml ethanol, 6.5ml ethylene glycol, 6.5ml ether, stir at room temperature for 1h; add 0.5000g TiOSO 4 , stirred for 12 hours to obtain a suspension; transfer the suspension to a polytetrafluoroethylene-lined autoclave, tighten the autoclave and put it in an oven, keep it warm at 110°C for 24 hours, and heat the autoclave after hydrothermal treatment The kettle was naturally cooled to room temperature to obtain a precipitate; the obtained precipitate was centrifuged, washed with ethanol, centrifuged, dried, ground and calcined at 500°C for 4 hours to obtain a tubular TiO 2 .

[0051] (2) Prepare graphene oxide with 3g graphite powder, 30ml concentrated sulfuric acid, 3g K 2 S 2 o 8 Add to the beaker in turn, stir, ultrasonic for 5 minutes, put into a water bath, heat to 80°C and stir for 6h; slowly add distilled water to dilute to 1000ml, then filter with suction, dry at room temperature overnight...

Embodiment 3

[0054] (1) Preparation of tubular TiO 2 Take 0.1000g P123 in a beaker, add 13ml ethanol, 6.5ml ethylene glycol, 6.5ml ether, stir at room temperature for 1h; add 0.5000g TiOSO 4 , stirred for 12 hours to obtain a suspension; transfer the suspension to a polytetrafluoroethylene-lined autoclave, tighten the autoclave and put it in an oven, keep it warm at 110°C for 24 hours, and heat the autoclave after hydrothermal treatment The kettle was naturally cooled to room temperature to obtain a precipitate; the obtained precipitate was centrifuged, washed with ethanol, centrifuged, dried, ground and calcined at 500°C for 4 hours to obtain a tubular TiO 2 .

[0055] (2) Prepare graphene oxide with 3g graphite powder, 30ml concentrated sulfuric acid, 3g K 2 S 2 o 8 Add to the beaker in turn, stir, ultrasonic for 5 minutes, put into a water bath, heat to 80°C and stir for 6h; slowly add distilled water to dilute to 1000ml, then filter with suction, dry at room temperature overnight...

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Abstract

The invention discloses a preparing method of tubular TiO2 / reduced graphene oxide composite. The preparing method includes: with TiOSO4 as a titanium source and Pluronic block copolymer (P123) as a soft template, synthesizing tubular TiO2 in mixed solution of ethyl alcohol, ethylene glycol and diethyl ether; synthesizing graphene oxide by means of the modified Hummers method; at high temperature, from the tubular TiO2 AND THE graphene oxide, assembling and preparing the tubular TiO2 / reduced graphene oxide composite by a hydrothermal method. During the preparation of the tubular TiO2 / reduced graphene oxide composite, no reducing agent is added; the graphene oxide is subjected to high-temperature hydrothermal reduction, which is green; the addition of the graphene oxide has no evident effect on the TiO2 shape; the TiO2 helps effectively maintain the tubular shape; the tubular TiO2 / reduced graphene oxide composites different in proportion can be made by adjusting the ratio of the TiO2 to the graphene oxide.

Description

technical field [0001] The present invention relates to tubular TiO 2 The invention relates to a preparation method of a reduced graphene oxide composite material, which belongs to the field of preparation of inorganic semiconductor materials. Background technique [0002] TiO 2 Because of its non-toxicity, good chemical stability and excellent chemical and physical properties, it is used in various fields, such as: photocatalysis, sensing, supercapacitors and solar cells. Graphene is a two-dimensional planar structure with hexagonal structural units formed by the close packing of carbon atoms. It has the advantages of large specific surface area, high electron mobility and good conductivity. But TiO 2 The electrical conductivity is relatively poor, graphene and TiO 2 Recombination can increase its conductivity, specific surface area and capacitance, and promote the separation of its electron-hole pairs. Existing TiO 2 / The preparation method of graphene composite mate...

Claims

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Application Information

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IPC IPC(8): C01G23/053C01B31/04B82Y30/00
Inventor 周国伟肖虹刘蕊蕊高婷婷
Owner 山东济清科技服务有限公司
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