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Active carbon fiber load calcium-doping titanium dioxide (TiO2) photocatalyst and preparation method of photocatalyst

A technology of activated carbon fiber and activated carbon fiber felt, which is applied in the field of preparation of titanium dioxide photocatalyst, can solve the problems of low photocatalytic degradation reaction rate, uneven composition, uneven doping, etc., and achieves improved photocatalytic efficiency, uniform distribution, Simple preparation process

Active Publication Date: 2012-08-22
SHANGHAI HUAMING HI TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The resulting composite photocatalyst uses methyl orange as a probe, and the degradation efficiency of the alkaline earth metal composite photocatalyst is higher than that of pure nano-titanium dioxide. Inhomogeneous components, uneven doping, and the problem of anion removal, so the photocatalytic degradation reaction rate is still low

Method used

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  • Active carbon fiber load calcium-doping titanium dioxide (TiO2) photocatalyst and preparation method of photocatalyst
  • Active carbon fiber load calcium-doping titanium dioxide (TiO2) photocatalyst and preparation method of photocatalyst
  • Active carbon fiber load calcium-doping titanium dioxide (TiO2) photocatalyst and preparation method of photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Preparation of calcium-doped titanium dioxide sol: Add 700g of n-butyl titanate to 1772g of ethanol at room temperature, stir for 30min to obtain a uniform and transparent yellow solution A; mix 886g of ethanol, 400g of water, and 71g of 65 wt% nitric acid and 95 g of anhydrous calcium chloride were thoroughly mixed to obtain solution B; under stirring, solution B was added dropwise to solution A to obtain a uniform and transparent sol. The sol was aged for 4 hours at room temperature before use.

[0044] Load and heat treatment: take 100g ACF (800m 2 / g, total pore volume 0.442cm 3 / g) was cut into blocks (80mm×100mm), ultrasonically washed in deionized water for 30 minutes, dried at 60°C for 4 hours, taken out, placed flat on a tray, and then the above-mentioned aged The sol was evenly poured on the ACF, and after its adsorption was saturated, it was dried in an oven at 60°C for 12 hours, and then it was transferred to a tube furnace for calcination: the heating rat...

Embodiment 2

[0048] Preparation of calcium-doped titanium dioxide sol: The sol was prepared according to the same method as in Example 1, except that the amount of calcium chloride was 57 g.

[0049] Loading and heat treatment: Carry out loading and heat treatment according to the same method and conditions as in Example 1 to obtain a composite photocatalytic material loaded with calcium-doped titanium dioxide and ACF.

[0050] Ca / Ti=0.25mol% of the obtained photocatalyst, and the photocatalyst loading capacity of the composite photocatalyst material is 1.02g / gACF.

[0051] Application test of photocatalytic materials: by Figure 4 The photocatalytic effect is visible, and after 40 minutes of light reaction, the COD removal rate reaches 86.9%.

Embodiment 3

[0053] Preparation of calcium-doped titanium dioxide sol: the same method and conditions as in Example 1, except that the amount of anhydrous calcium chloride was 152 g.

[0054] Loading and heat treatment: Carry out loading and heat treatment according to the same method and conditions as in Example 1 to obtain a composite photocatalytic material loaded with calcium-doped titanium dioxide and ACF.

[0055] The Ca / Ti of the obtained photocatalyst was 0.67mol%, and the photocatalyst loading capacity of the composite photocatalyst material was 1.02g / gACF.

[0056] Application test of photocatalytic materials: by Figure 5 The photocatalytic effect is visible, and after 40 minutes of light reaction, the COD removal rate reaches 81.2%.

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Abstract

The invention discloses an active carbon fiber load calcium-doping titanium dioxide (TiO2) photocatalyst and a preparation method of the photocatalyst. The catalyst consists of active carbon fiber and calcium-doping TiO2 immobilized on the active carbon fiber. The cheap and easy-to-obtain calcium elements are adopted to be used as doping elements for improving the photocatalysis activity of TiO2, the capability for degrading organic contaminants is higher, the photocatalyst can be applicable to the degradation treatment of organic contaminants in waste water, in addition, higher photocatalysis activity can still be realized when the concentration of the organic contaminants in the waste water is low, the calcium elements are directly compounded on the TiO2, the secondary pollution problem is avoided, the preparation process is simple, the immobilization of the TiO2 on the surface of the active carbon fiber is firm, the serious falling phenomenon is avoided, the composite photocatalysis materials can be repeatedly used, and the photocatalysis efficiency basically maintains unchanged.

Description

technical field [0001] The invention relates to a photocatalytic material and a preparation method thereof, in particular to a preparation method of a titanium dioxide photocatalyst used for treating organic pollutants in water. Background technique [0002] With the development of the economy, the environmental pollution is becoming more and more serious. Since modern industries discharge wastewater containing a large amount of organic pollutants to the surrounding water bodies, many organic pollutants contain benzene rings that have a strong inhibitory effect on organisms and are difficult to biodegrade. Available water resources are dwindling. [0003] At present, photocatalytic oxidation is widely used in the treatment of biodegradable organic pollutants in water. Photocatalytic oxidation is a direct and effective treatment method, which has attracted more and more attention, especially the use of titanium dioxide TiO 2 The new process of catalytic oxidation of semicon...

Claims

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Application Information

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IPC IPC(8): B01J23/02B01J35/10A62D3/10
Inventor 吴秋芳王雪余蓉蓉宣绍峰汪中进马新胜
Owner SHANGHAI HUAMING HI TECH GRP