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Process for producing absorbent charcoal loading titanium dioxide photocatalyst

A photocatalyst and titanium dioxide technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve the effects of cheap raw materials, easy operation, and simple process

Inactive Publication Date: 2008-08-20
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, no metatitanic acid is used as titanium source to prepare activated carbon-supported TiO by sol impregnation-calcination method. 2 Photocatalyst report

Method used

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  • Process for producing absorbent charcoal loading titanium dioxide photocatalyst
  • Process for producing absorbent charcoal loading titanium dioxide photocatalyst
  • Process for producing absorbent charcoal loading titanium dioxide photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) After commercial activated carbon is pulverized, it is sieved with 50-100 meshes to obtain granular activated carbon, which is washed several times with deionized water and dried.

[0026] (2) Under the condition of ice-water bath, 1.5g of metatitanic acid and 4.5ml of ammonia water were added into 20mL of 30% hydrogen peroxide, and after stirring for 50 minutes, a yellow-green sol was obtained.

[0027] (3) Add 4 g of granular activated carbon obtained in step (1) to the sol obtained in step (2), stir for 4 hours, and then let stand for 24 hours. The activated carbon was filtered out and calcined at 600°C for 2h under the protection of an inert gas. The resulting product is anatase activated carbon supported titanium dioxide photocatalyst, TiO 2 Content 9wt%.

[0028] Product obtained in step (3) is characterized by XRD, SEM respectively, from figure 1 It can be seen that the product is anatase phase. from figure 2 Visible in TiO 2 The particles are evenly d...

Embodiment 2

[0030] (1) After the commercial activated carbon is pulverized, it is sieved with 50-100 meshes to obtain granular activated carbon which is passed through O 3 After 2 hours of treatment, wash with deionized water until neutral, and dry.

[0031] (2) Under the condition of ice-water bath, 1.5g of metatitanic acid and 4.5ml of ammonia water were added into 30mL of 30% hydrogen peroxide, and the yellow-green sol was obtained after stirring for 1 hour.

[0032] (3) Add 4 g of pretreated granular activated carbon into the sol, stir for 4 hours, and then let stand for 24 hours. The activated carbon was filtered out and calcined at 600°C for 2h under the protection of an inert gas. The resulting product is anatase activated carbon supported titanium dioxide photocatalyst, TiO 2 Content 13wt%.

Embodiment 3

[0034] (1) After the commercial activated carbon is pulverized, it is sieved with 100 to 150 meshes to obtain powdered activated carbon which is passed through O 3 After 2 hours of treatment, wash with deionized water until neutral, and dry.

[0035] (2) Add 1.0 g of metatitanic acid and 3 ml of ammonia water to 20 mL of 30% hydrogen peroxide in an ice-water bath, and stir to obtain a yellow-green sol.

[0036] (3) Add 3 g of pretreated powdered activated carbon into the sol, stir for 4 hours, and then let stand for 24 hours. The activated carbon was filtered out and calcined at 600°C for 2h under the protection of an inert gas. The resulting product is anatase activated carbon supported titanium dioxide photocatalyst, TiO 2 Content 10wt%.

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Abstract

The invention relates to a preparation method of activated carbon supported titanium dioxide photocatalyst, belonging to the preparation technical field of titanium dioxide photocatalyst, comprising a plurality of steps as followings: pretreating, washing and drying the activated carbon; at the condition of ice-water bath, adding meta-titanic acid and ammonia according to a molar ratio of 1:2 into 20 to 40 milliliter hydrogen peroxide with a concentration of 30%, and agitating for 50 to 70 minutes to obtain a yellowish green sol; then adding the pretreated activated carbon into the yellowish green sol and agitating for 3 to 5 hours, filtering the activated carbon after standing for 12 to 24 hours, then calcining with the protection of inert gas to obtain the activated carbon supported titanium dioxide photocatalyst. The weight ratio of the pretreated activated carbon and the meta-titanic acid is 1:1 to 3:1. The preparation method has the advantages of simple technology, cheap raw material, mild preparation conditions, easy operation, granular shape, good organic pollutant degradation effect, easy separation, regeneration and long service life of the supported photocatalyst prepared by the preparation method, nonuse of organic solvent, non-pollution in the whole production process, accordance with the requirement of sustainable development and environment-friendly integrated technology.

Description

Technical field [0001] The invention belongs to the technical field of preparation of titanium dioxide photocatalysts, and specifically relates to a method for preparing activated carbon-supported titanium dioxide photocatalysts. Background technique [0002] TiO 2 Photocatalysts have been widely researched and applied in the fields of water purification, air purification, disinfection and antibacterial, and sewage treatment. TiO 2 It is an N-type semiconductor material with stable chemical properties and resistance to photocorrosion. It has the advantages of large band gap, high redox potential, strong driving force for photocatalytic reactions, and high photocatalytic activity. It can make some endothermic chemicals Reacts in TiO irradiated by light 2 The surface is realized and accelerated, and with the addition of TiO 2 Cheap, easy to obtain, non-toxic and harmless, low cost, so TiO 2 Photocatalytic research is very active. Nano TiO 2 It is the most widely researc...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J21/18
Inventor 胡中华王晓静刘亚菲陈玉娟张静刘巍
Owner TONGJI UNIV
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