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Simple preparation method of blue/black titanium dioxide photocatalytic material

A technology of black titanium dioxide and photocatalytic materials, applied in the field of photocatalytic materials, can solve the problems of hindering the large-scale use of materials, low efficiency of photo-splitting water for hydrogen production, etc. The effect of improving efficiency

Active Publication Date: 2021-10-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its forbidden band width of 3.2eV and light absorption band edge of about 400nm, only ultraviolet light, which accounts for about 4% of the energy in sunlight, can be used, which makes its photolysis of water and hydrogen production efficiency extremely low, hindering the large-scale application of the material. use

Method used

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  • Simple preparation method of blue/black titanium dioxide photocatalytic material
  • Simple preparation method of blue/black titanium dioxide photocatalytic material
  • Simple preparation method of blue/black titanium dioxide photocatalytic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Cut the commercial aluminum foil paper to a size of 10cm×10cm, and fold it in half, fold the edges, etc. to get an aluminum foil bag of about 5cm×8cm. Then put 0.5 g of commercial titanium dioxide nanocrystalline particles (P25) weighed into an aluminum foil bag to close the mouth of the bag, and fold it into a 4cm×4cm aluminum foil sheet. Press the aluminum foil wrapped with P25 into tablets with a tablet machine, so that the P25 is evenly distributed in the aluminum foil and in close contact with the upper and lower layers of the aluminum foil. Then use a corundum crucible to support the aluminum foil, place it in a tube furnace, feed 60 standard ml / min (60 sccm) of high-purity argon, and use a pressure reducing valve to control the argon pressure to 0.15 MPa. Before starting to heat up, pass argon for 60 minutes to remove the air in the quartz tube, then raise the temperature in the tube furnace to 600°C at a heating rate of 3°C / min, keep it at this temperature for 1...

Embodiment 2

[0029]Cut the commercial aluminum foil paper to a size of 10cm×10cm, and fold it in half, fold the edges, etc. to get an aluminum foil bag of about 5cm×8cm. Then put 0.5 g of commercial titanium dioxide nanocrystalline particles (P25) weighed into an aluminum foil bag to close the mouth of the bag, and fold it into a 4cm×4cm aluminum foil sheet. Press the aluminum foil wrapped with P25 into tablets with a tablet machine, so that the P25 is evenly distributed in the aluminum foil and in close contact with the upper and lower layers of the aluminum foil. Then use a corundum crucible to support the aluminum foil, place it in a tube furnace, feed 60 standard ml / min (60 sccm) of high-purity argon, and use a pressure reducing valve to control the argon pressure to 0.15 MPa. Before starting to heat up, pass argon gas for 60mins to remove the air in the quartz tube, then raise the temperature in the tube furnace to 620°C at a heating rate of 3°C / min, keep at this temperature for 6h, a...

Embodiment 3

[0032] Cut the commercial aluminum foil paper to a size of 10cm×10cm, and fold it in half, fold the edges, etc. to get an aluminum foil bag of about 5cm×8cm. Then put 0.5 g of commercial titanium dioxide nanocrystalline particles (P25) weighed into an aluminum foil bag to close the mouth of the bag, and fold it into a 4cm×4cm aluminum foil sheet. Press the aluminum foil wrapped with P25 into tablets with a tablet machine, so that the P25 is evenly distributed in the aluminum foil and in close contact with the upper and lower layers of the aluminum foil. Then use a corundum crucible to support the aluminum foil, place it in a tube furnace, feed 90 standard ml / min (90 sccm) of high-purity argon, and use a pressure reducing valve to control the argon pressure to 0.2 MPa. Before starting to heat up, pass argon gas for 40mins to remove the air in the quartz tube, then raise the temperature in the tube furnace to 600°C at a heating rate of 3°C / min, keep at this temperature for 8h, a...

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Abstract

The invention discloses a simple preparation method of a blue / black titanium dioxide (TiO2-x) photocatalytic material. The blue / black titanium dioxide (TiO2-x) photocatalytic material is prepared by reducing commercial titanium dioxide nanocrystalline particles (P25) by aluminum foil at a relatively high temperature. The method mainly comprises the following steps: wrapping a certain amount of commercial titanium dioxide nanocrystalline particles with an aluminum foil, tabletting the aluminum foil filled with titanium dioxide by using a tablet press, finally putting the aluminum foil into a tubular furnace, and carrying out heat treatment at a relatively high temperature for a certain time by introducing gas to obtain a TiO2-x product. Compared with a traditional TiO2-x preparation method, the method has the advantages of being easy and convenient to operate, safe in process, capable of achieving high-throughput preparation and the like, under simulated sunlight irradiation, the photocatalytic water splitting hydrogen production performance of the obtained product is obviously improved compared with commercial titanium dioxide nanocrystalline particles, and a foundation is laid for industrial application of titanium dioxide photocatalytic hydrogen production.

Description

technical field [0001] The invention relates to the field of photocatalytic materials, in particular to a simple blue / black titanium dioxide photocatalytic material (TiO 2-x , 0<x<2, that is, oxygen defects), the material can be used for photocatalytic decomposition of water to prepare hydrogen. Background technique [0002] With the continuous advancement of science and technology and the continuous improvement of social production and living standards, people's demand for clean and renewable energy continues to increase. Among them, how to use light energy more efficiently, an inexhaustible and widely distributed clean energy, has attracted great attention from scientific and technological workers from all over the world. At present, there are mainly four ways to develop and utilize solar energy in the world: light-thermal energy conversion, light-electric energy conversion, light-chemical energy conversion and light-biomass energy conversion. Among them, photocata...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J23/42B01J35/00B01J35/02B01J37/08B01J37/16C01B3/04
CPCB01J37/16B01J37/08B01J21/063B01J23/42C01B3/042B01J35/40B01J35/39Y02E60/36
Inventor 潘新花雷伟生王凤志叶志镇
Owner ZHEJIANG UNIV
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