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A Simple Preparation Method of Blue/Black Titanium Dioxide Photocatalyst 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: 2022-05-10
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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  • A Simple Preparation Method of Blue/Black Titanium Dioxide Photocatalyst Material
  • A Simple Preparation Method of Blue/Black Titanium Dioxide Photocatalyst Material
  • A Simple Preparation Method of Blue/Black Titanium Dioxide Photocatalyst Material

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Experimental program
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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. Use a tablet machine to press the aluminum foil sheet wrapped with P25, so that the P25 is evenly distributed in the aluminum foil sheet and in close contact with the upper and lower layers of the aluminum foil sheet. 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 temperatur...

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. Use a tablet machine to press the aluminum foil sheet wrapped with P25, so that the P25 is evenly distributed in the aluminum foil sheet and in close contact with the upper and lower layers of the aluminum foil sheet. 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 fo...

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. Use a tablet machine to press the aluminum foil sheet wrapped with P25, so that the P25 is evenly distributed in the aluminum foil sheet and in close contact with the upper and lower layers of the aluminum foil sheet. 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 fo...

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Abstract

The invention discloses a simple blue / black titanium dioxide (TiO 2‑x ) preparation method of photocatalytic material, blue / black titanium dioxide (TiO 2‑x ) photocatalytic material was prepared by reducing commercial titania nanocrystalline particles (P25) with aluminum foil at higher temperature. The main steps are: wrap a certain amount of commercial titanium dioxide nanocrystalline particles with aluminum foil, and use a tablet press to press the aluminum foil containing titanium dioxide into tablets, and finally place it in a tube furnace, and heat it at a higher temperature with a certain amount of gas. time, get TiO 2‑x product. Compared with traditional TiO 2‑x Preparation method, this method has the advantages of simple operation, safe process, and high-throughput preparation. The obtained product has a photocatalytic water splitting hydrogen production performance that is significantly improved compared with commercial titanium dioxide nanocrystalline particles under simulated sunlight irradiation. The industrial application of catalytic production of hydrogen has laid the foundation.

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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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J23/42B01J35/00B01J35/02B01J37/08B01J37/16C01B3/04
CPCB01J35/004B01J35/023B01J37/16B01J37/08B01J21/063B01J23/42C01B3/042Y02E60/36
Inventor 潘新花雷伟生王凤志叶志镇
Owner ZHEJIANG UNIV
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