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Photocatalytic component and preparation method thereof

A photocatalytic, photocatalytic unit technology

Active Publication Date: 2020-12-25
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, most of the commercial titanium dioxide products currently used for photocatalysis are powder materials, and the amount of raw materials is large, and because of its wide band gap (3.0ev~3.2ev), its activation performance can only be excited by ultraviolet light, photocatalytic limited efficiency
In order to improve the photocatalytic efficiency of titanium dioxide, the industry has tried many methods, mainly to reduce the band gap of titanium dioxide to increase the absorption of near-ultraviolet light, but it still cannot effectively improve its photocatalytic efficiency. Therefore, its current photocatalytic efficiency still lower

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  • Photocatalytic component and preparation method thereof
  • Photocatalytic component and preparation method thereof
  • Photocatalytic component and preparation method thereof

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preparation example Construction

[0045] Such as Figure 4 Shown, the preparation method of the photocatalytic assembly of one embodiment, comprises the following steps:

[0046] Step S410: forming a first metal layer on the substrate, so that the first metal layer is formed by stacking first metal nanoparticles.

[0047] Specifically, the method of forming the first metal layer on the substrate is thermal evaporation, wherein the evaporation rate is The vacuum degree is 1×10 -6 Pa~1×10 -5 Pa. The metal can be nucleated to form particles with a specific shape and structure under the vacuum degree and evaporation rate, so that the first metal layer is formed by stacking the first metal nanoparticles. Compared with the chemical synthesis method, thermal evaporation has simpler steps, and there is no residual chemical composition, and the thermal evaporation method can achieve the first metal layer in the form of metal nanoparticles stacked, and through the above parameters to Effective control of the parti...

Embodiment 1

[0073] The preparation process of the photocatalytic assembly of the present embodiment is as follows:

[0074] (1) Vacuum to 5×10 -6 Pa, close the substrate cover plate, put the metal film material in the evaporation boat, adjust the power supply current of the heating evaporation boat to 120A, observe the counting frequency of the detector, when the counting frequency reaches , keep the heating current, open the substrate cover plate, start evaporation, record the value of the detector, when the thickness of the metal layer on the substrate reaches 5nm, close the substrate cover plate, turn off the power supply of the evaporation boat, wait for 10 minutes, Break the vacuum to obtain a substrate formed with a metal layer formed by accumulation of metal nanoparticles, and the metal nanoparticles have a rod-like structure, and the average particle diameter of the metal nanoparticles is 15 nanometers to 30 nanometers, such as Figure 6 as shown, Figure 6 It is a scanning ele...

Embodiment 2

[0078] The preparation process of the photocatalytic assembly of the present embodiment is as follows:

[0079] (1) Vacuum to 5×10 -6 Pa, close the substrate cover plate, put the metal film material in the evaporation boat, adjust the power supply current of the heating evaporation boat to 120A, observe the counting frequency of the detector, when the counting frequency reaches , keep the heating current, open the substrate cover plate, start evaporation, record the value of the detector, when the thickness of the metal layer on the substrate reaches 1 nanometer, close the substrate cover plate, turn off the power supply of the evaporation boat, and wait for 10 minutes , break the vacuum, and obtain a substrate formed with a metal layer formed by accumulation of metal nanoparticles, and the metal nanoparticles have a spherical structure, and the particle diameter of the metal nanoparticles is 5 to 10 nanometers, such as Figure 7 as shown, Figure 7 It is a scanning electro...

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Abstract

The invention relates to a photocatalytic component and a preparation method thereof. The photocatalytic component includes a substrate and a photocatalytic unit stacked on one side of the substrate. The photocatalytic unit includes a stacked titanium dioxide layer and a metal layer. The thickness of the titanium dioxide is 10 nanometers to 100 nanometers, and the metal layer is stacked by metal nanoparticles. Forming, the material of the metal nanoparticles is selected from one of rhodium, palladium, platinum, gold, silver and aluminum. The above-mentioned photocatalytic component has high photocatalytic efficiency.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a photocatalytic component and a preparation method thereof. Background technique [0002] In recent years, with the increasingly serious pollution of water resources, the research on water resource purification has also received more and more attention, especially the topic of using photocatalysis to degrade pollutants in water. Due to titanium dioxide (TiO 2 ) is an environmentally friendly and cheap material, and has the advantages of stable chemical properties, high catalytic activity, strong oxidation ability, non-toxicity, and no secondary pollution. It is widely used as a photocatalyst and plays an important role in degrading pollutants in water. application value. [0003] However, most of the commercial titanium dioxide products currently used for photocatalysis are powder materials, and the amount of raw materials is large, and because of its wide band gap (3.0ev~3.2ev)...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/30B01J35/00
CPCC02F1/30C02F2305/10B01J35/393B01J35/40B01J2235/30B01J35/45C02F1/725C02F2305/08B01J23/38B01J23/50C23C14/14C23C16/45555C23C28/30C23C28/32C23C28/322C23C28/34C23C28/345B01J21/063B01J37/0217B01J37/0225C23C16/0227C23C16/405C02F1/32B01J37/0228Y02W10/37B01J35/19B01J35/39C23C16/45529C23C16/06C23C28/00B01J35/23B01J35/30
Inventor 吴文政何颜玲万子龙彭佳慧唐运湘
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA