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Method for improving efficiency of visible light response doping-type M-TiO2/AC photocatalyst

A photocatalyst, doped technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve the problem of weak organic gas adsorption force and insufficient catalytic efficiency Advanced problems, to achieve the effect of easy promotion, improved photocatalytic activity, and simple equipment

Active Publication Date: 2010-12-08
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the shortcomings of the activated carbon-loaded catalysts in the prior art, the activated carbon has not been adjusted in pore size, the professional adsorption force to organic gases is not strong, and the catalytic efficiency is not high enough. The invention provides a doped M-TiO with improved visible light response 2 / AC photocatalyst efficiency method, strong practicability, simple operation, easy preparation, high catalytic efficiency

Method used

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  • Method for improving efficiency of visible light response doping-type M-TiO2/AC photocatalyst
  • Method for improving efficiency of visible light response doping-type M-TiO2/AC photocatalyst
  • Method for improving efficiency of visible light response doping-type M-TiO2/AC photocatalyst

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Embodiment 1

[0026] Take granular activated carbon with a diameter of 2.0-3.2 mm, pickle with hydrochloric acid, wash with water, and dry for later use. With phosphoric acid as the activator, the mass ratio of phosphoric acid to activated carbon is 1:1, impregnated at 150°C for 5 hours, and then placed in a box-type resistance furnace under N 2 Activate under protection, the heating rate is 10°C / min, the activation temperature is 600°C, and cool to room temperature after activation. The sample was acid-washed and water-washed to neutral, and the pore size modified activated carbon AC was prepared. 1 .

[0027] Press with TiO 2 Accurately weigh the oxide or sulfate of a certain amount of metal M (one or more of Ag, Sn, Fe, Ce or Cu) in the mass ratio (15%), and add it to 1.5ml distilled water and Add 2ml of glacial acetic acid to 15ml of absolute ethanol to form solution A; add 10ml of tetrabutyl titanate to 30ml of absolute ethanol under vigorous stirring, and stir for 1 hour. Then slo...

Embodiment 2

[0029] Take granular activated carbon with a diameter of 2.0-3.2 mm, pickle with hydrochloric acid, wash with water, and dry for later use. With phosphoric acid as the activator, the mass ratio of phosphoric acid to activated carbon is 2:1, impregnated at 100°C for 4 hours, and then placed in a box-type resistance furnace under N 2Activate under protection, the heating rate is 5°C / min, the activation temperature is 800°C, and cool to room temperature after activation. The sample was acid-washed and water-washed to neutral, and the pore size modified activated carbon AC was prepared. 2 .

[0030] Press with TiO 2 Accurately weigh the oxide or sulfate of a certain amount of metal M (one or more of Ag, Sn, Fe, Ce or Cu), mix it with 1.5ml distilled water and Add 2ml of glacial acetic acid to 15ml of absolute ethanol to form solution A; add 10ml of tetrabutyl titanate to 30ml of absolute ethanol under vigorous stirring, and stir for 1 hour. Then slowly drop into solution A (2 ...

Embodiment 3

[0032] Take granular activated carbon with a diameter of 2.0-3.2 mm, pickle with hydrochloric acid, wash with water, and dry for later use. With phosphoric acid as the activator, the mass ratio of phosphoric acid to activated carbon is 2:1, impregnated at 200 ° C for 5 h, and then placed in a box-type resistance furnace under N 2 Activate under protection, the heating rate is 10°C / min, the activation temperature is 600°C, and cool to room temperature after activation. The sample was acid-washed and water-washed to neutral, and the pore size modified activated carbon AC was prepared. 3 .

[0033] Press with TiO 2 Accurately weigh the oxide or sulfate of a certain amount of metal M (one or more of Ag, Sn, Fe, Ce or Cu), mix it with 1.5ml distilled water and Add 2ml of glacial acetic acid to 15ml of absolute ethanol to form solution A; add 10ml of tetrabutyl titanate to 30ml of absolute ethanol under vigorous stirring, and stir for 1 hour. Then slowly drop into solution A (2 ...

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Abstract

The invention discloses a method for improving the efficiency of a visible light response doping-type M-TiO2 / AC photocatalyst, comprising the following steps of: taking granular active carbon, pickling with chlorohydric acid and washing with water, and drying for later use; dipping the granular active carbon for 4-10h at 100-300 DEG C by taking phosphoric acid as a chambering agent; then activating under N2 protection, wherein the temperature rise speed is 5-15 DEG C / min, and the activating temperature is 600-900 DEG C; cooling to room temperature after the activation is ended; then pickling with the chlorohydric acid and washing with water to be neutral, and preparing modified activated carbon (AC); according to the conventional method, adding TiO2, metal M oxides or sulphate to mixed liquor of distilled water, glacial acetic acid and absolute ethanol under stirring to form a solution; slowly dripping the solution to an ethanol solution of tetrabutyl titanate; then adding carrier activated carbon; and loading two times to obtain the doping-type M-TiO2 / AC photocatalyst. Under visible light, the photocatalysis degradation of the photocatalyst on gas-phase toluene can reach 99 percent.

Description

technical field [0001] The invention belongs to the technical field of application of new carbon materials, and mainly relates to a doped M-TiO with improved visible light response 2 / AC photocatalyst efficiency method. Background technique [0002] TiO 2 As an ideal semiconductor photocatalyst, it has the advantages of stable chemical properties, no secondary pollution, large band gap, high photoactivity, large photocatalytic reaction driving force, and low cost. It has broad application prospects and advantages in purification, air purification and disinfection. However, the concentration of pollutants in air and water is generally mg / L or even lower, and the pollutants and TiO 2 There are few contact active points, so that the degradation rate is not high. Using activated carbon as the carrier of photocatalyst can solve the above problems well. [0003] At the same time, TiO 2 Photocatalytic materials still have deficiencies in photodegradation, research shows that ...

Claims

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Application Information

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IPC IPC(8): B01J23/10B01J23/14B01J23/54B01J23/76
Inventor 孙康蒋剑春卢辛城崔丹丹戴伟娣
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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