Method for preparing loading functional oxide porous carbon

A technology of porous carbon and oxides, applied in chemical instruments and methods, other chemical processes, through adsorption, etc., can solve the problem of low process yield and achieve the effect of controllable pore structure

Inactive Publication Date: 2010-07-21
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology can realize the TiO of porous carbon materials 2 loading, however the TiO of the as-prepared material 2 It is only loaded on the surface of porous carbon and does not enter the inside of the pores, and the yield of this technology is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Dried rice husks were selected as raw materials, washed, dried and crushed, then heated to 400°C for carbonization under vacuum conditions at a rate of 1°C / min, and kept for 6 hours. The porous carbon obtained after carbonization was pulverized and mixed with KOH at a mass ratio of 0.1:1, and activated at a rate of 5°C / min to 1000°C for 1 hour under a nitrogen protective atmosphere. The activated porous carbon was soaked in titanium nitrate solution for 12 hours, filtered out, washed several times with distilled water, and dried. Raise the impregnated porous carbon to 1000°C at a rate of 20°C / min under a nitrogen protective atmosphere and hold it for 0.5 hours to prepare loaded TiO 2 porous carbon composites. The catalytic effect of the composite on methylene blue can reach that of pure TiO 2 3 times the effect of the material.

Embodiment 2

[0024] Dried wheat straw was selected as the raw material, washed, dried and pulverized, then heated up to 1000°C for carbonization under vacuum conditions at a heating rate of 10°C / min, and kept for 0.5 hours. The porous carbon obtained after carbonization was pulverized and mixed with ZnCl 2 Mix at a mass ratio of 3:1, and activate for 6 hours at a temperature increase rate of 10°C / min to 650°C under a nitrogen protective atmosphere. The activated porous carbon was soaked in tin nitrate solution for 12h, filtered out, washed several times with distilled water, and dried. The impregnated porous carbon can be prepared by raising the temperature of the impregnated porous carbon to 400°C at a rate of 10°C / min under nitrogen protection atmosphere and keeping it for 3 hours. 2 porous carbon composites.

Embodiment 3

[0026] Select dried coconut shells as raw materials, wash, dry and pulverize them, then raise the temperature to 1000°C for carbonization under vacuum conditions at a rate of 20°C / min, and keep the heat for 2 hours. The porous carbon obtained after carbonization was pulverized and mixed with KOH at a mass ratio of 3:1, and activated at a rate of 10°C / min to 300°C for 12 hours under a nitrogen protective atmosphere. The activated porous carbon was soaked in nickel nitrate solution for 12 hours, filtered out, washed several times with distilled water, and dried. The impregnated porous carbon was heated to 400°C at a rate of 1°C / min under a nitrogen protective atmosphere and kept at this temperature for 6 hours to prepare a porous carbon composite material loaded with NiO.

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Abstract

The invention relates to a method for preparing a loading functional oxide porous carbon, which belongs to the technical field of carbon material. The method comprises the following steps of: selecting biomass material, and carbonizing at the temperature of 400-1000 DEG C in vacuum or on inert condition; preparing porous carbon by a physical activating or chemical activating process according to the requirement on the pore structure by the carbonized porous carbon; immersing the porous carbon into a precursor solution of an element M, cleaning many times with distilled water, and drying; roasting on the porous carbon at the temperature of 300-1000 DEG C in vacuum or on inert atmosphere, and then the active carbon of the loading functional oxide MxOy is prepared. The active carbon of the loading functional oxide MxOy prepared by the invention has the special pore structure of the biomass, also has the functions performed by the oxides, and has important application value in water treatment, hydrogen storage, photocatalysis, fuel cells and relevant fields.

Description

technical field [0001] The invention relates to a preparation method in the technical field of carbon materials, in particular to a preparation method of porous carbon loaded with functional oxides. Background technique [0002] Porous carbon is an important carbon material, which has the characteristics of developed pore structure and high specific surface area, and has strong adsorption capacity for gases, inorganic or organic substances in solution, and colloidal particles. Therefore, conventional porous carbons are mainly used for gas or water treatment. The activated carbon adsorption method mainly utilizes the porous characteristics of activated carbon, so that harmful substances in the gas or solution are adsorbed on the surface of activated carbon and removed. Among them, the adsorption of pollutants by activated carbon can be divided into physical adsorption and chemical adsorption, most of which are mainly physical adsorption. In recent years, many scholars have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B01J20/20B01J20/32
CPCY02C10/08Y02C20/40
Inventor 刘庆雷朱申敏张荻
Owner SHANGHAI JIAO TONG UNIV
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