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Composite photocatalyst, preparation method and device thereof, and air purification method

A photocatalyst, composite technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of lack of supporting air purification devices, low photocatalyst degradation efficiency, etc., to reduce the composite rate , the effect of enhancing photocatalytic performance and photocatalytic degradation performance

Active Publication Date: 2022-07-08
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a composite photocatalyst and its preparation method, device, and air purification method, the purpose of which is to provide a novel photocatalyst based on titanium dioxide, and to provide a A continuous flow photocatalytic reactor that can be used for indoor air purification, thereby solving the technical problems of low photocatalyst degradation efficiency and lack of supporting air purification devices in the field of air purification

Method used

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  • Composite photocatalyst, preparation method and device thereof, and air purification method
  • Composite photocatalyst, preparation method and device thereof, and air purification method
  • Composite photocatalyst, preparation method and device thereof, and air purification method

Examples

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Embodiment 1

[0038] This embodiment provides a method for preparing a titanium dioxide nanotube composite photocatalyst, and a titanium dioxide nanotube composite photocatalyst prepared by the method.

[0039] (1) Preparation of metal molybdenum-doped titanium dioxide nanotubes: Titanium sheets with a length and width of 2.5cm×2cm and a thickness of 0.1mm were ultrasonically cleaned with ethanol and deionized water for 20 minutes in turn, and then placed in a polishing solution for chemical polishing. The volume ratio of each component of the chemical polishing solution is deionized water: sulfuric acid: hydrofluoric acid = 6:3:1, and the chemical polishing time is 30s.

[0040] After repeated cleaning with deionized water, drying with nitrogen, the titanium sheet was put into a fluorine-containing electrolyte for anodic oxidation, wherein the platinum sheet electrode was used as the cathode, the titanium sheet was used as the anode, and the electrolyte was composed of glycerol, ammonium fl...

Embodiment 2

[0049] The difference between this example and Example 1 is that in this example, in step (2), the amount of the spin-coating precursor solution using a glue spinner is 0.25 ml. The titanium dioxide nanotube composite photocatalyst prepared by this example is denoted as 0.25Sb 2 S 3 / Mo-NT.

Embodiment 3

[0051] The difference between this example and Example 1 is that in this example, in step (2), the amount of the precursor solution for spin coating using a glue spinner is 0.75 ml. The titanium dioxide nanotube composite photocatalyst prepared by this example is recorded as 0.75Sb 2 S 3 / Mo-NT.

[0052] The experiment of photocatalytic degradation of toluene was carried out on the titanium dioxide nanotube composite photocatalyst provided in Example 1-3, and the results were as follows figure 2 As shown, the degradation efficiency of toluene is 80.25% (Example 2), 87.53% (Example 1), 83.33% (Example 3).

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Abstract

The invention discloses a composite photocatalyst, a preparation method and device thereof and an air purification method. The composite photocatalyst comprises a titanium dioxide nanotube doped with metal molybdenum, and antimony trisulfide formed on the surface of the titanium dioxide nanotube. The photocatalyst provided by the invention has the advantages of high catalytic activity, strong stability and the like, reaction products are CO2 and H2O, no pollution is caused to an indoor gaseous environment, the material can be recycled for multiple times when being applied to a reactor device, and the requirement of indoor degradation of gaseous organic pollutants is met.

Description

technical field [0001] The invention belongs to the technical field of air pollution control, and more particularly, relates to a composite photocatalyst and a preparation method, device and air purification method thereof. Background technique [0002] Volatile organic compounds (VOCs) exist widely in the atmospheric environment and have serious impacts on human health and the surrounding environment. In life, people will inevitably be exposed to VOCs. Indoor decoration samples, furniture, etc. will produce VOCs, and benzene series is one of them. It is a poisonous carcinogen, which can seriously affect the health of the human body after inhaling it unconsciously. Therefore, it is necessary and urgent to seek a simple and effective technology for degrading indoor benzene-based polluting gases. [0003] Photocatalytic degradation of VOCs directly utilizes the light source, and produces less secondary pollutants after the reaction. It is an environmentally friendly advance...

Claims

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Application Information

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IPC IPC(8): B01J27/051B01J37/34B01D53/86B01D53/44B01D53/72
CPCB01J27/051B01J37/348B01D53/8668B01D53/8687B01D2258/06B01D2257/708B01D2257/7027B01J35/40B01J35/39Y02A50/20
Inventor 龚建宇陈冠文赵浩卢瑶
Owner HUAZHONG UNIV OF SCI & TECH