A method for preparing porous carbon spheres from ripe sweetgum tree fruit and its adsorption application

A liquidambar and porous carbon technology, which is applied in the field of preparing porous carbon balls, can solve the problems of high preparation cost and complicated preparation conditions of porous carbon materials, and achieves the effect of simple method and convenient storage and transportation.

Inactive Publication Date: 2018-08-31
NANJING FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems such as the high preparation cost and the complicated preparation conditions of porous carbon materials in the prior art, and provides a kind of raw material that uses the fruit of natural plants (gum gum) as raw material, by carbonization under inert gas , to obtain porous carbon spheres with a diameter of 1-2cm, and used to absorb and recover oil or organic matter on the water surface

Method used

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  • A method for preparing porous carbon spheres from ripe sweetgum tree fruit and its adsorption application
  • A method for preparing porous carbon spheres from ripe sweetgum tree fruit and its adsorption application
  • A method for preparing porous carbon spheres from ripe sweetgum tree fruit and its adsorption application

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Experimental program
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Effect test

Embodiment 1

[0023] Take 1.5g of paraffin oil (stained with Oil Red O) and add it dropwise on the water surface to form an oil film. Take a sweetgum cone that has been carbonized (heating rate is 10°C / min, stay at 400°C for 1 hour, and stay at 600°C for 2.5 hours) and put it into the edge of the oil film. After putting in the carbon balls, the oil film shrinks rapidly and the carbon balls are inhaled. After the oil film is completely inhaled, take out the carbon ball and immerse the ball in n-hexane to desorb the paraffin oil.

Embodiment 2

[0025] After carbonization (heating rate is 10°C / min, stay at 400°C for 1h, and stay at 600°C for 2.5h), immerse the sweetgum cones in paraffin oil, take them out after a certain period of time, and stay in the air for 1-2 minutes, Weigh it. The oil absorption mass is the weight after adsorption minus the initial carbon sphere mass, and the oil absorption is the ratio of the oil absorption mass to the initial mass of the sphere (g / g). The carbonized liquidambar cones have an adsorption capacity of 2.4g / g to paraffin oil.

[0026] The saturated carbon spheres are put into an organic solvent (n-hexane) for desorption, and the desorption rate is the ratio of the weight of the desorbed oil to the weight of the oil absorbed. The weight of the desorbed oil is the weight difference of the ball before and after desorption. Carbon spheres can be completely desorbed within 5 minutes, and the desorption rate can reach 99%. The desorbed spheres were dried at 60°C, and the desorbed sphe...

Embodiment 3

[0028] After carbonization (the heating rate is 5°C / min, stay at 300°C for 1h, and stay at 600°C for 3h), dip the sweetgum cones in turpentine, take them out after a certain period of time, stay in the air for 1-2 minutes, and weigh them. Heavy. The oil absorption mass is the weight after adsorption minus the initial mass, and the oil absorption is the ratio of the oil absorption mass to the initial mass of the ball (g / g). The carbonized liquidambar cones have an adsorption capacity of 1.9g / g for turpentine. After 10 cycles, the carbon spheres basically maintain the same adsorption and desorption capacity (1.89g / g), which has excellent recycling performance.

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Abstract

The invention discloses a simple method for preparing porous carbon spheres from ripe fruits (capitate infructescence) of Liquidambar formosana hance. The porous carbon spheres with certain mechanical strength can be obtained through a simple charring process by using the method. The carbon spheres keep the spherical structure and the tunnel structure of original fruit spheres, have extremely strong lipophilic and hydrophobic properties, can float on the water surface, and can rapidly adsorb various oils and organic solvents on the water surface. The carbon spheres have excellent desorption performance (reaching 99%) and cycle use performances. Raw materials of the above product are abundant and cheap, the preparation method is concise, and the product has high oil or organic matter adsorption performance, so the carbon spheres are a functionalized material having extremely good prospect and being used for adsorbing and recovering oil stains and organic solvents on water.

Description

technical field [0001] The present invention uses mature fruit of trees as raw material to prepare porous carbon balls, specifically a kind of porous carbon ball with rich and cheap natural plant fruit (capitum inflorescence of liquidambar tree) as raw material, and obtains porous carbon balls with hydrophobic and lipophilic properties through a simple carbonization process. Porous carbon balls are used to absorb and recover oil or organic solvents on the water surface. Background technique [0002] Due to the immiscibility of oil and water and the specific gravity of oil is less than that of water, the oil or part of the organic solvent leaked on the water surface will form a thin film on the water surface. The formation of oil film not only causes serious damage to the ecosystem in the water body, but also affects human life and health. In addition, due to the stability of the oil, its long-term impact on the contaminated area requires rapid treatment of the oil spilled a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05B01J20/20
CPCB01J20/20C01P2004/01
Inventor 姚建峰冯艺刘世长
Owner NANJING FORESTRY UNIV
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