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N-TiO2 silkworm excrement carbonization dual-functional adsorbent and preparation method thereof

A dual-function, adsorbent technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of difficult hydrophobic high-selectivity adsorption of aldehyde VOCs, etc., to reduce energy consumption, high Capture ability, high reactivity effect

Inactive Publication Date: 2016-12-21
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because, if we want the material to increase the adsorption force of aldehyde VOCs, the result will inevitably lead to a corresponding increase in the adsorption force of the material to water molecules. It is difficult to achieve the hydrophobicity of the material and the high selective adsorption of aldehyde VOCs

Method used

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  • N-TiO2 silkworm excrement carbonization dual-functional adsorbent and preparation method thereof
  • N-TiO2 silkworm excrement carbonization dual-functional adsorbent and preparation method thereof
  • N-TiO2 silkworm excrement carbonization dual-functional adsorbent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A kind of N-TiO 2 The preparation method of carbonized silkworm excrement bifunctional adsorbent comprises the following steps,

[0030] (1) Preparation of carbonized silkworm excrement

[0031] in N 2 In the atmosphere, 10.0 g of raw silkworm excrement was raised to 500°C at a heating rate of 5°C / min, kept at 500°C for more than 3 hours, and then cooled to room temperature to obtain carbonized silkworm excrement, which was denoted as CS.

[0032] (2) A-TiO 2 Preparation of carbonized silkworm excrement material;

[0033] Add the ethylene glycol solution (5mL) containing 1.0g butyl titanate dropwise to the aqueous solution containing 0.3g carbonized silkworm excrement (the aqueous solution is 2.5mL), and stir vigorously until fully hydrolyzed to form amorphous TiO 2 , to prepare A-TiO 2 Carbonized silkworm excrement material;

[0034] (3) N-TiO 2 Preparation of carbonized silkworm excrement bifunctional adsorbent;

[0035] The prepared A-TiO 2 Carbonized silkwo...

Embodiment 2

[0037] A kind of N-TiO 2 The preparation method of carbonized silkworm excrement bifunctional adsorbent comprises the following steps,

[0038] (1) Preparation of carbonized silkworm excrement

[0039] in N 2 In the atmosphere, 10.0 g of raw silkworm excrement was raised to 600°C at a heating rate of 2°C / min, kept at 600°C for 8 hours, and then cooled to room temperature until carbonized silkworm excrement was recorded as CS.

[0040](2) A-TiO 2 Preparation of carbonized silkworm excrement material;

[0041] Add the ethanol solution (30mL) containing 1.0g butyl titanate dropwise to the aqueous solution containing 0.6g carbonized silkworm excrement (the aqueous solution is 15mL), and stir vigorously until fully hydrolyzed to form amorphous TiO 2 , to prepare A-TiO 2 Carbonized silkworm excrement material;

[0042] (3) N-TiO 2 Preparation of carbonized silkworm excrement bifunctional adsorbent;

[0043] The prepared A-TiO 2 Carbonized silkworm excrement material 2.0g is...

Embodiment 3

[0045] A kind of N-TiO 2 The preparation method of carbonized silkworm excrement bifunctional adsorbent comprises the following steps,

[0046] (1) Preparation of carbonized silkworm excrement

[0047] in N 2 In the atmosphere, 10.0 g of raw silkworm excrement was raised to 1000°C at a heating rate of 8°C / min, kept at 1000°C for more than 1 hour, and then cooled to room temperature to obtain carbonized silkworm excrement, which was denoted as CS.

[0048] (2) A-TiO 2 Preparation of carbonized silkworm excrement material;

[0049] Add the ethanol solution (15 mL) containing 1.0 g butyl titanate dropwise to the aqueous solution containing 0.9 g carbonized silkworm excrement (the aqueous solution is 30 mL), and stir vigorously until fully hydrolyzed to form amorphous TiO 2 , to prepare A-TiO 2 Carbonized silkworm excrement material;

[0050] (3) TiO 2 - Preparation of N-doped carbonized silkworm excrement bifunctional adsorbent;

[0051] The prepared A-TiO 2 Carbonized s...

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Abstract

The invention discloses an N-TiO2 silkworm excrement carbonization dual-functional adsorbent, as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) placing silkworm excrement into a high-temperature tubular furnace, introducing protection gas for purging, heating to 500 to 1,000 DEG C for high-temperature carbonization reaction, and obtaining carbonized silkworm excrement CS; (2) adding butyl titanate into a selective alcohol solvent, then dropwise adding into a carbonized silkworm excrement-containing aqueous solution, hydrolyzing the butyl titanate to generate amorphous TiO2, and obtaining an A-TiO2 / carbonized silkworm excrement material; (3) performing surface modification on the material in a plasma radiation way to obtain an N-doped A-TiO2 / carbonized silkworm excrement material; (4) calcining the material at the temperature of 180 to 500 DEG C, and finally obtaining an N-TiO2 / CS composite material which is the N-TiO2 silkworm excrement carbonization dual-functional adsorbent. The dual-functional adsorption material disclosed by the invention is applied to synchronous adsorption and catalytic degradation of aldehydes and benzene series VOCs (volatile organic compounds).

Description

technical field [0001] The invention belongs to the field of porous carbon materials, in particular to N-TiO 2 Carbonized silkworm excrement bifunctional adsorbent material and its preparation method. Background technique [0002] Porous carbon materials are a kind of high-efficiency commonly used adsorbents. Their adsorption capacity is high and the cost is low. However, the surface of such carbon materials often has abundant hydrophilic groups (oxygen-containing groups), showing strong affinity watery. Therefore, in a humid environment, the adsorption capacity is often greatly reduced due to the competitive adsorption of water vapor molecules, especially for polar VOCs (such as formaldehyde, acetaldehyde, etc.), this problem becomes particularly prominent. Studies have shown that the adsorption capacity of activated carbon to toluene is reduced by 17% under the condition of relative humidity of 3.0RH%, and the adsorption capacity of butane is reduced by 30% under the con...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30B01J20/28B01D53/86B01D53/44B01J27/24B01J21/06B01J35/10B01D53/02
CPCB01D53/02B01D53/8668B01J20/06B01J20/20B01J20/28057B01J21/063B01J27/24B01D2257/708B01D2253/10B01J2220/4887B01J35/39B01J35/653B01J35/657
Inventor 赵祯霞武阳胡鹏赵钟兴
Owner GUANGXI UNIV
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