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Preparation method and application of titanium dioxide-graphene oxide-carbon composite material (TiO2-GO-AC)

A carbon composite material, titanium dioxide technology, applied in chemical instruments and methods, special compound water treatment, physical/chemical process catalysts, etc. and other problems, to achieve the effect of improving catalytic activity, reducing manufacturing cost, and strong adsorption capacity

Inactive Publication Date: 2016-11-09
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But TiO 2 The bandgap width is large (about 3.2 eV), and solar energy cannot be fully utilized. The recombination probability of photogenerated electrons and holes is high, so the ultimate sub-efficiency is low. In addition, because the particle size is nanoscale, it is difficult to recycle after use.

Method used

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  • Preparation method and application of titanium dioxide-graphene oxide-carbon composite material (TiO2-GO-AC)
  • Preparation method and application of titanium dioxide-graphene oxide-carbon composite material (TiO2-GO-AC)
  • Preparation method and application of titanium dioxide-graphene oxide-carbon composite material (TiO2-GO-AC)

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Experimental program
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Effect test

Embodiment 1

[0017] Sonicate 31.25ml GO for 1h, add 0.125g titanium dioxide powder, add coal-based activated carbon (abbreviated as AC1), stir for 0.5h, then transfer the mixture to a 50ml hydrothermal reactor, put it in a drying oven at 180°C for 12h. After cooling, filter with suction and wash with water until there is no Cl - (tested with silver nitrate solution), and then vacuum-dried at 60°C to obtain the composite photocatalyst TiO formed by activated carbon supported titanium dioxide-GO 2 -GO-AC l).

[0018] During the experiment, 50 ml Rhodamine B (2×10 -4 mol / L) solution is placed in the reactor, adding TiO 2 - GO-ACl particles 72.46 mg. Stir for 30 min in the black box under the condition of ventilation, so that the adsorption of Rhodamine B on the surface of titanium dioxide particles is balanced, and then, take 0.5 ml slurry from the reactor for centrifugation, and the concentration of Rhodamine B in the supernatant is marked as C 0 . Then turn on the light source to carry...

Embodiment 2

[0020] Ultrasound 31.25ml of GO for 1 hour, add 0.125g of titanium dioxide powder, add 0.025g of coconut shell activated carbon (abbreviated as AC2), stir for 0.5h, then transfer the mixture to a 50ml hydrothermal reaction kettle, put it in a drying oven and react at 180°C 12h. After cooling, filter with suction, wash with water until there is no Cl- (tested with silver nitrate solution), and then vacuum-dry at 60°C to obtain the composite photocatalyst TiO formed by supporting titanium dioxide on activated carbon. 2 -GO-AC2).

[0021] During the experiment, 50 ml Rhodamine B (2×10 -4 mol / L) solution is placed in the reactor, adding TiO 2 - GO-AC2 Granules 72.46 mg. Stir in the black box for 30 min under the condition of air ventilation to balance the adsorption of Rhodamine B on the surface of titanium dioxide particles. Then, take 0.5 ml slurry from the reactor for centrifugation, and the concentration of Rhodamine B in the supernatant is marked as C0. Then turn on the l...

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Abstract

Belonging to the technical field of composite materials, the invention provides a preparation method and application of a titanium dioxide-graphene oxide-carbon composite material (TiO2-GO-AC). The composite material is obtained by taking graphene oxide modified titanium dioxide (TiO2-GO) as the precursor and then using graphite to load TiO2-GO. The composite material has the advantages of high photocatalytic activity and large specific surface area. TiO2-GO adopts Ti-O-C chemical bond to combine, and the photocatalysis effect is greatly improved than TiO2. As a micropore developed porous adsorbent, activated carbon has very strong adsorption capacity on dissolved organic matters in water, and also has very good adsorption effect on some pollutants difficult for biochemical or oxidative degradation. Activated carbon is added to the TiO2-GO composite material, and the catalytic activity of the material can be further improved. Therefore, the titanium dioxide-graphene oxide-carbon composite material is a good photocatalytic reaction catalyst.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a titanium dioxide-graphene oxide-carbon composite material (TiO 2 -GO-AC) preparation method; The present invention also relates to the application of the titanium dioxide-graphene oxide-carbon composite material. Background technique [0002] Titanium dioxide (TiO 2 ) has the advantages of strong chemical stability, non-toxic and harmless, and low cost, and is widely used [0003] focus on. But TiO 2 The bandgap width of carbon dioxide is large (about 3.2 eV), and solar energy cannot be fully utilized. The recombination probability of photogenerated electrons and holes is high, so the ultimate sub-efficiency is low. In addition, because the particle size is nanoscale, it is difficult to recycle after use. Graphene oxide has the advantages of large specific surface area, good electrical conductivity, and easy preparation. It is very suitable as a catalyst carrier. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J20/20B01J20/30C02F1/30C02F101/30
CPCB01J20/06B01J20/20C02F1/30B01J27/22C02F2101/308C02F2305/10B01J35/39Y02W10/37
Inventor 李海涛渠陆陆王娜李艳艳朱根张柯王瑞雪
Owner XUZHOU NORMAL UNIVERSITY
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