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TiO2 aerosol photocatalyst and preparation method thereof and method for treating organic waste gas

A photocatalyst and organic waste gas technology, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of limited contact area between photocatalyst and organic waste gas, photocatalyst One-sided light receiving, crowded reactor space and other problems, to achieve the effect of improving light absorption capacity, benefiting efficiency and prolonging residence time

Active Publication Date: 2017-05-31
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] 1) Photocatalyst, such as TiO 2 Generally, it is powder, which is placed on the carrier (such as molecular sieve, aluminum mesh, etc.), so that the photocatalyst can only receive light on one side, which seriously affects its light energy utilization rate;
[0007] 2) The carrier used in large quantities takes up the space in the reactor;
[0008] 3) The carrier is mostly honeycomb, and the contact area between the photocatalyst loaded on it and the organic waste gas is limited

Method used

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  • TiO2 aerosol photocatalyst and preparation method thereof and method for treating organic waste gas
  • TiO2 aerosol photocatalyst and preparation method thereof and method for treating organic waste gas
  • TiO2 aerosol photocatalyst and preparation method thereof and method for treating organic waste gas

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Embodiment 1

[0055] Embodiment 1: the treatment of formaldehyde waste gas by platinum-carried titanium dioxide aerosol of the present invention

[0056] 1. Preparation of platinum-supported titanium dioxide aerosol:

[0057] (1) Dissolve 2g of polyvinylpyrrolidone in 50ml of absolute ethanol, and stir for 10min;

[0058] (2) Dissolve 1 g of cellulose in 50 ml of absolute ethanol, stir for 30 min, and let stand for 2 days to obtain cellulose gel;

[0059](3) Dissolve 1g of tetrabutyl titanate and 1.3ml of chloroplatinic acid (the concentration of chloroplatinic acid is 1g / 100ml) in 50ml of the solution obtained in step (1), and then add the cellulose obtained in step (2) Gel 0.5g, stirred for 30min, stood still for 5h, transferred to a 100ml autoclave at 120°C for 15h, and then dried to obtain platinum-supported titanium dioxide aerosol with a specific surface area of ​​450.2m 2 / g.

[0060] 2. Construction of plasma photocatalytic system

[0061] Fill 5g of platinum-supported titaniu...

Embodiment 2

[0064] Embodiment 2: the treatment of formaldehyde waste gas by platinum-carried titanium dioxide aerosol of the present invention

[0065] 1. Preparation of platinum-supported titanium dioxide aerosol:

[0066] (1) Dissolve 2g of polyvinylpyrrolidone in 50ml of absolute ethanol, and stir for 10min;

[0067] (2) Dissolve 1 g of cellulose in 45 ml of absolute ethanol, stir for 25 min, and let stand for 2 days to obtain cellulose gel;

[0068] (3) Dissolve 1g of tetrabutyl titanate and 1.3ml of chloroplatinic acid (the concentration of chloroplatinic acid is 1g / 100ml) in 50ml of the solution obtained in step (1), and then add the cellulose obtained in step (2) Gel 0.5g, stirred for 30min, stood still for 5h, transferred to a 100ml autoclave, reacted at 150°C for 15h, and dried to obtain platinum-supported titanium dioxide aerosol with a specific surface area of ​​561.3m 2 / g.

[0069] 2. Construction of plasma photocatalytic system

[0070] Fill 5g of platinum-supported ti...

Embodiment 3

[0073] Embodiment 3: the treatment of formaldehyde waste gas by platinum-carried titanium dioxide aerosol of the present invention

[0074] 1. Preparation of platinum-supported titanium dioxide aerosol:

[0075] (1) Dissolve 2g of polyvinylpyrrolidone in 50ml of absolute ethanol, and stir for 12min;

[0076] (2) Dissolve 1 g of cellulose in 50 ml of absolute ethanol, stir for 35 minutes, and let stand for 2 days to obtain cellulose gel;

[0077] (3) Dissolve 1g of tetrabutyl titanate and 1.3ml of chloroplatinic acid (the concentration of chloroplatinic acid is 1g / 100ml) in 50ml of the solution obtained in step (1), and then add the cellulose obtained in step (2) Gel 0.5g, stirred for 30min, stood still for 5h, transferred to a 100ml autoclave at 180°C for 15h, and then dried to obtain platinum-supported titanium dioxide aerosol with a specific surface area of ​​228.1m 2 / g.

[0078] 2. Construction of plasma photocatalytic system

[0079] Fill 5g of platinum-supported ti...

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Abstract

The invention provides a TiO2 aerosol photocatalyst and a preparation method thereof and a method for treating organic waste gas. The preparation method of the TiO2 aerosol photocatalyst comprises the following steps that 1, polyvinylpyrrolidone is dissolved in absolute ethyl alcohol, and stirring is conducted; 2, cellulose is dissolved in absolute ethyl alcohol, stirring and standing are conducted, and cellulose gel is obtained; 3, tetrabutyl titanate and chloroplatinic acid are dissolved in the solution obtained in the step 1, then, the cellulose gel obtained in the step 2 is added into the mixture, stirring and standing are conducted, the mixture is transferred into a high-pressure reaction kettle, reacting is conducted for 12-18 h at 120-180 DEG C, vacuum drying is conducted, and the TiO2 aerosol photocatalyst is obtained. The invention further provides the method for treating the organic waste gas through the TiO2 aerosol photocatalyst. The method has the advantages that the method is implemented at normal temperature, the technological process is simple, and the organic waste gas degradation rate is high; in addition, by means of the method, the photocatalyst is prepared into platinum loaded titanium dioxide aerosol, a photocatalyst carrier is not needed, and the cost of photo catalytic treatment on the organic waste gas can be effectively lowered.

Description

technical field [0001] The present invention relates to a kind of TiO 2 Aerosol photocatalyst, its preparation method, and its method for treating organic waste gas. Background technique [0002] There are many ways to treat organic waste gas, such as combustion method, absorption method, adsorption method, biological method, photocatalytic method, low temperature plasma method, etc. [0003] In recent years, the treatment of gaseous pollutants by photocatalytic technology has attracted more and more attention from all over the world. Studies have shown that this technology can decompose organic matter in exhaust gas into CO under normal temperature and normal pressure conditions. 2 、H 2 O and other inorganic substances have great potential application value. [0004] TiO 2 It has the characteristics of good chemical stability, non-toxic, cheap, easy to obtain, relatively positive valence band potential and relatively negative conduction band potential, etc. It is an ide...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01D53/86B01D53/72
CPCB01D53/8668B01J23/42B01J35/23B01J35/39
Inventor 崔恩田李清萍侯贵华邓育新张峰郭雯许艳梅陈红霞
Owner YANCHENG INST OF TECH
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