Supported optical catalyst and preparation method thereof

A photocatalyst and load-type technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of poor benzene removal effect, avoid secondary pollution, increase decomposition rate, increase The effect of service life

Inactive Publication Date: 2008-12-10
刘守新 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a supported photocatalyst and its preparat

Method used

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  • Supported optical catalyst and preparation method thereof
  • Supported optical catalyst and preparation method thereof
  • Supported optical catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0013] Embodiment 1: The supported photocatalyst in this embodiment is a surface loaded with 1 to 5 layers of TiO 2 Granular activated carbon fibers.

[0014] Scanning electron microscope image of activated carbon fiber figure 1 shown.

[0015] The specific surface area of ​​the activated carbon fiber used in this embodiment is 800 to 1500 m 2 / g, the total pore volume is 0.35 ~ 0.65m 2 / g, the aperture is 16~21 .

Example Embodiment

[0016] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the surface-loaded TiO 2 The particle size of the particles is 10 to 13 nm. Others are the same as the first embodiment.

[0017] It has been tested that TiO in this embodiment 2 The particle size of the particles is 10-13 nm, which is in the critical size of 13 nm, and thus has high activity.

Example Embodiment

[0018] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the supported photocatalyst has two layers of TiO supported on the surface. 2 Granular activated carbon fibers. Others are the same as the first embodiment.

[0019] image 3 It is a scanning electron microscope image of the supported photocatalyst in this embodiment, and the surface of the supported photocatalyst is dense and flat.

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Abstract

The invention provides a supported photocatalyst and a preparation method thereof, relating to a photocatalyst and a preparation method thereof; the invention solves the problem of poor benzene removal effect of the existing photocatalyst. The supported photocatalyst is the active carbon fiber with TiO2 particles loaded on the surface. The catalyst has the preparation method that: 1. preparing solution A; 2. preparing solution B; 3. preparing and aging a titanium dioxide sol; 4. coating the titanium dioxide sol on the active carbon fiber, irradiating with microwaves, shifting to high purity nitrogen for purging, rising the temperature to 200-250 DEG C, keeping the temperature for 1-2h, heating to 350-450 DEG C, calcining at the constant temperature for 2-3h, and cooling to the room temperature. The supported photocatalyst of the invention has more than 28 percent of benzene removal efficiency under the condition of 30-70 DEG C and 1h of lighting, which is free from the influence of the benzene concentration in a gaseous environment, and can completely decompose the volatile organic compounds in an enclosed environment into non-toxic, harmless and tasteless substances after a period of time of application.

Description

technical field [0001] The invention relates to a photocatalyst and a preparation method thereof. Background technique [0002] In recent years, with the use of indoor building decoration materials and household chemicals, indoor air pollution has become more and more serious. Paints, paints, and plywood used in living rooms and offices can release volatile organic compounds (VOCs) such as formaldehyde and benzene into the air. etc. cause indoor pollution, seriously endanger people's health, especially have carcinogenicity, and have become the most important factor causing leukemia in infants and young children. The use of photocatalysts to remove indoor volatile organic compounds is the most effective way, which can avoid the secondary pollution caused by the saturation of adsorbents, and is environmentally friendly and energy-saving; however, the current photocatalysts have poor removal effects on volatile organic compounds, especially molecular Benzene is structurally st...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J21/18A61L9/22
Inventor 刘守新刘正锋
Owner 刘守新
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