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Preparation method of activated carbon loaded and Zn2+/TiO2-doped photocatalyst

A photocatalyst, activated carbon technology, applied in physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., to achieve the effects of easy promotion, convenient operation and simple equipment

Active Publication Date: 2010-07-14
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

[0005] In order to solve the TiO existing in the prior art 2 / AC is a single type of load, and the degradation efficiency of gas pollutants needs to be improved. The invention provides an activated carbon load doped with Zn 2+ / TiO 2 Preparation method of photocatalyst, simple operation, easy preparation, high degradation efficiency

Method used

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  • Preparation method of activated carbon loaded and Zn2+/TiO2-doped photocatalyst

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preparation example Construction

[0020] A kind of activated carbon supported doped type Zn 2+ / TiO 2 The preparation method of photocatalyst comprises the following steps:

[0021] In the first step, 1-2.98g of zinc nitrate is weighed, and zinc nitrate, 1.5ml of distilled water and 2ml of glacial acetic acid are added to 15ml of absolute ethanol under stirring to form solution A.

[0022] Under vigorous stirring, add 8-15ml of tetrabutyl titanate into 30ml of absolute ethanol, and stir for 1-2h to fully hydrolyze to form solution B.

[0023] In the second step, after stirring well, slowly drop solution A into B, and continue stirring for 30 minutes to make the reaction fully. Then add 10-15g of activated carbon with a clean surface, stir vigorously for 1 hour to fully mix, soak for 12-72 hours, filter, wash with absolute ethanol and deionized water several times, after cleaning, place the loaded activated carbon at 120 Dry at ℃ for 2h, and then bake at 300-550℃ for 2h to obtain activated carbon supported d...

Embodiment 1

[0028] The bamboo is taken and crushed, cleaned and dried for later use. Phosphoric acid was used as an activator, and the mass ratio of activator to bamboo was 2:1 for preactivation for 2 hours. in N 2 Under the atmosphere, at a heating rate of 10°C / min, activate at an activation temperature of 400°C for 40 minutes, pickle and wash with water until neutral, dry to obtain bamboo activated carbon, grind, sieve, and control the particle size of activated carbon at 6-10 mesh . Accurately weigh 1.28g of zinc nitrate, add zinc nitrate, 1.5ml of distilled water and 2ml of glacial acetic acid into 15ml of absolute ethanol under stirring to form solution A; add 10ml of tetrabutyl titanate into 30ml of In water and ethanol, stir for 1h. Then slowly drop in solution A at a rate of 2 mL / min, and continue stirring for 30 min after the addition to fully react to obtain a sol. Then add 15.6 g of 6-10 mesh granular clean activated carbon, stir vigorously for 1 h, soak for 24 h, filter, a...

Embodiment 2

[0030] Accurately weigh 1.68g of zinc nitrate, add zinc nitrate, 1.5ml of distilled water and 2ml of glacial acetic acid into 15ml of absolute ethanol under stirring to form solution A; add 10ml of tetrabutyl titanate into 30ml of In water and ethanol, stir for 1h. Then slowly drop into solution A (2 mL / min), and continue to stir for 30 min to obtain a sol. Then add 15.6 g of commercially available 6-10 mesh granular activated carbon, stir vigorously for 1 h, soak for 24 h, filter, and wash several times with absolute ethanol and deionized water. The loaded activated carbon was dried at 120 °C for 2 h, and then calcined at 450 °C for 2 h to obtain activated carbon supported doped Zn 2+ / TiO 2 Photocatalyst, the photocatalytic degradation rate of the obtained photocatalyst to toluene is 92%.

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Abstract

The invention discloses a preparation method of an activated carbon loaded and Zn2+ / TiO2-doped photocatalyst, which comprises the following steps that: step 1: a certain amount (1 to 2.98g) of zinc nitrate is weighed, the zinc nitrate, 1.5ml distilled water and 2ml glacial acetic acid are added into 15ml absolute ethyl alcohol while being stirred, to form solution A; and step 2: 10ml tetrabutyl titanate is added into 30ml absolute ethyl alcohol while being intensively stirred, and stirred for a certain period of time (1 to 2h). After being stirred for a period of time, the solution A is slowly dripped into B, and continuously stirred for 30min. And then a certain amount of pre-treated activated carbon is intensively stirred for 1h, dipped for 12 to 72h, filtered, and washed by the absolute ethyl alcohol and deionized water for a plurality of times. The loaded activated carbon is dried for 2h at 120 DEG C, and calcined for 2h at 300 to 550 DEG C to prepare the activated carbon loaded and Zn2+ / TiO2-doped photocatalyst. The photocatalytic degradation rate of the photocatalyst to gas-phase toluene can reach 92 percent, which is 1.3 times of that of a single TiO2 / AC photocatalyst.

Description

technical field [0001] The invention belongs to the technical field of carbonaceous materials application, and mainly relates to a method for preparing activated carbon loaded with doped Zn 2+ / TiO 2 photocatalytic method. Background technique [0002] TiO 2 As an ideal semiconductor photocatalyst, it has broad application prospects and advantages in solar energy utilization, water purification, air purification and disinfection. TiO 2 It has the advantages of stable chemical properties, no secondary pollution, large bandgap width, high photoactivity, and large photocatalytic reaction driving force. In addition, it is cheap and easy to obtain, so it has been paid attention to in the research of photocatalytic degradation of polluting organic compounds. 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 carbo...

Claims

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Application Information

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IPC IPC(8): B01J27/25B01D53/86B01D53/72
Inventor 蒋剑春卢辛成孙康戴伟娣
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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