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A kind of hierarchical porous carbon and its preparation method and application

A technology of graded porous and calcium citrate, which is used in the preparation/purification of carbon, general water supply saving, testing water, etc., can solve the problems of complicated preparation method steps, unfriendly environment, high cost, short cycle and save preparation Steps, low cost effect

Active Publication Date: 2020-12-01
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the increasing demand for hierarchical porous carbon, the existing preparation method has cumbersome steps, long cycle, high cost, unfriendly environment and the urgency of developing cheap solid-phase microextraction probes, the invention provides a hierarchical porous carbon ( MPC) and its preparation method, and the application of hierarchical porous carbon (MPC) in high-efficiency solid-phase microextraction probe

Method used

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  • A kind of hierarchical porous carbon and its preparation method and application
  • A kind of hierarchical porous carbon and its preparation method and application
  • A kind of hierarchical porous carbon and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Synthetic raw materials:

[0049] Raw material A is potassium citrate;

[0050] Raw material B is calcium citrate;

[0051] Weigh raw material A and raw material B with a mass ratio of 5:2 and mix them evenly, place them in a tubular muffle furnace, and raise the temperature to 850°C under nitrogen protection (gas flow rate: 100mL / min), with a heating rate of 5°C / min , the holding time is 1h, after the reaction is completed, the temperature is lowered to room temperature, and the sample is taken out. Utilize 10% hydrochloric acid solution to pickle the sample, then dry it in an oven at 120°C, and pulverize it to obtain a graded porous carbon material (MPC 5 / 2 ).

[0052] Such as figure 1 a and figure 1 As shown in b, the prepared MPC 5 / 2 It is a flaky structure with partial graphitization, and an obvious and widely distributed pore structure can be seen.

Embodiment 2

[0054] Synthetic raw materials:

[0055] Raw material A is potassium citrate;

[0056] Raw material B is calcium citrate;

[0057] Weigh raw materials A and raw materials B with a mass ratio of 5:0.5 and mix them evenly, place them in a tubular muffle furnace, and raise the temperature to 850°C under nitrogen protection (gas flow rate 100mL / min), with a heating rate of 5°C / min , the holding time is 1h, after the reaction is completed, the temperature is lowered to room temperature, and the sample is taken out. Utilize 10% hydrochloric acid solution to pickle the sample, then dry it in an oven at 120°C, and pulverize it to obtain a graded porous carbon material (MPC 5 / 0.5 ).

Embodiment 3

[0059] Synthetic raw materials:

[0060] Raw material A is potassium citrate;

[0061] Raw material B is calcium citrate;

[0062] Weigh raw materials A and raw materials B with a mass ratio of 5:1 and mix them evenly, place them in a tubular muffle furnace, and raise the temperature to 850°C under nitrogen protection (gas flow rate 100mL / min), with a heating rate of 5°C / min , the holding time is 1h, after the reaction is completed, the temperature is lowered to room temperature, and the sample is taken out. Utilize 10% hydrochloric acid solution to pickle the sample, then dry it in an oven at 120°C, and pulverize it to obtain a graded porous carbon material (MPC 5 / 1 ).

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Abstract

The invention discloses staged porous charcoal, and a preparing method and applications thereof, and belongs to the field of material preparation and application. One or two of potassium citrate or sodium citrate, adopted as a raw material A, and one or more than two of calcium citrate, iron citrate or zinc citrate, adopted as a raw material B, are fully mixed; a template agent and an activating agent are generated through high-temperature carbonization and self-activation so that addition of extra template agents and activating agents is not needed; and the staged porous charcoal having a micropore-mesopore-macropore structure having three types of pores is prepared through one step, omitting a step of secondary activation. The preparing method is simple, short in period, low in cost andenvironmentally friendly. Through adjusting the mass ratio of the raw materials, the pore sizes and distribution of micropores, mesopores, and macropores in the staged porous charcoal can be adjusted.The prepared staged porous charcoal is wide in pore diameter distribution, high in pore capacity and high in specific surface area, and has a certain graphene structure. A solid microextraction probeprepared by utilizing the staged porous charcoal can achieve trace detection of organic pollutants in water environments.

Description

technical field [0001] The invention belongs to the field of material preparation and application, and more specifically relates to a hierarchical porous carbon (abbreviated as MPC) with adjustable pore size distribution and its preparation method and application. Background technique [0002] Porous carbon is a class of high-performance materials with stable properties and well-developed pore structure, which has been widely used in energy storage, catalysis, water treatment, electronics and other fields. Due to exhibiting good performance, the demand is increasing day by day. In the application of porous carbon, pore size classification and distribution are very important, which determines the application effect. Macropores and mesopores can realize the internal mass transport and interaction of the target; micropores can increase the specific surface area of ​​the material, increase the adsorption energy and interaction sites of the solid surface. Therefore, hierarchica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05G01N33/18
CPCC01B32/05G01N33/1826Y02A20/20
Inventor 程虎宋洋卞永荣纪荣婷王芳蒋新
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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