Adsorption-photo catalyst and its preparation method

A technology of photocatalyst and titanium dioxide, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. It can solve the problems of high preparation cost, difficult product reuse, complicated preparation process, etc., and achieve simple preparation process , reduce processing costs and reduce investment

Inactive Publication Date: 2005-11-16
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of these photocatalysts is usually complicated, most of them require expensive organic titanium sources, the preparation cost is high, and the products are difficult to reuse.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Prepare the adsorption-photocatalyst according to the following steps:

[0015] (1) Weigh 100-200 meshes of calcium-based bentonite and 500 meshes of titanium dioxide according to the mass ratio of bentonite: titanium dioxide = 100:6, fully grind and mix the two, and put them into a muffle furnace at 300°C for heat preservation 1 hour, then heat up to 550 ° C, heat preservation and roasting for 2 hours;

[0016] (2) Weigh the aluminum salt according to the mass ratio of bentonite: aluminum (Al) = 100: 0.5, configure it into an aqueous solution containing 1.0% aluminum, pour the roasted product of the previous step into this solution, and gradually Add dropwise 1:3NH 3 ·H 2 O, adjust the pH value of the solution at about 10 to convert the aluminum salt into aluminum hydroxide, continue to stir for 10 minutes, dry at 90°C, gradually heat up to 450°C, and heat-preserve and roast for 2 hours to convert aluminum hydroxide into trioxide Aluminum;

[0017] (3) take the sil...

Embodiment 2

[0021] Adsorption-photocatalyst was prepared according to the method of Example 1, and the concentration was 400 mg L respectively -1 100mL of aqueous solutions of industrial dyes such as direct pink, direct acid-resistant bright red, direct light-fast turquoise blue, direct navy blue, direct dark smoke, direct positive gray, direct black L-N, direct copper blue BR, etc. are placed in a 250mL beaker, according to Example 1 In the same way, the above-mentioned dye solutions were treated with adsorption-photocatalyst, and the results are shown in Table 2.

[0022] dye

Embodiment 3

[0024] According to the method and steps of Example 1, the mass ratio of bentonite:titanium dioxide:Al:Ag=100:5:0.6:0.5 was weighed to prepare an adsorption-photocatalyst. Take 100mL of refinery wastewater from Nanchong Oil Refinery, its COD Cr 256mg·L -1 According to the same wastewater treatment method as in Example 1, the above oil refinery wastewater was treated with adsorption-photocatalyst, and the COD removal rate increased with the prolongation of the treatment time. The results are shown in Table 3.

[0025] Processing time (min)

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PUM

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Abstract

An adsorbing photocatalyst for treaitng water is prepared from modified benton as main carrier, Al2O3 as secondary carrier and the TiO2 and Ag as active components through proportionally mixing modified benton with TiO2, high-temp calcining, immersing in the solution of aluminium hydroxide, baking, high-temp calcining, immersing in Ag salt solution, baking and high-temp calcining. Its advantages are high adsorbing power and activity, and low cost.

Description

technical field [0001] The invention relates to an adsorption-photocatalyst and a preparation method thereof. Background technique [0002] Human beings are facing increasingly severe water pollution problems. Due to the diversity and complexity of water pollution, conventional water treatment methods are far from meeting the needs of environmental protection. New low-cost, effective and environmentally friendly wastewater treatment methods are sought Materials and methods, reducing the cost of water treatment and increasing the reuse rate of water have become urgent problems to be solved. [0003] Bentonite is a 2:1 layered aluminosilicate mineral with montmorillonite as the main component. Due to its special chemical composition and lattice structure, it has cation exchange, adsorption, expansion, and cohesive properties. , non-toxicity, fire resistance and other important properties, through modification to change its surface structure, increase the surface area, enhance...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J23/50B01J37/00
Inventor 陈集饶小桐罗健生尹忠粟松涛
Owner SOUTHWEST PETROLEUM UNIV
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