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A kind of magnetic graphite phase carbon nitride material and its preparation method and application

A graphite phase carbon nitride and magnetic technology, which is applied in the field of analysis and detection, can solve the problems of long separation time, poor selectivity, and poor safety, and achieve the effect of increasing specific surface area and good selective adsorption capacity

Active Publication Date: 2021-09-21
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Currently, radionuclides in food samples 210 Pb enrichment methods mainly include resin method, precipitation method, solvent extraction method and ion exchange method, etc., but these methods have disadvantages such as poor safety, long separation time, and poor selectivity, which seriously affect the radioactive elements in the sample. 210 Pb determination results (Z. S. Chen, Chin. J. Radiol. Med. Prot. , 1990, 10(1):49−52; X. T. Yang, Chin. J. Radiol. Med. Prot. , 1988, 8(4):254−256)

Method used

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  • A kind of magnetic graphite phase carbon nitride material and its preparation method and application
  • A kind of magnetic graphite phase carbon nitride material and its preparation method and application
  • A kind of magnetic graphite phase carbon nitride material and its preparation method and application

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Embodiment 1

[0042] Example 1 as figure 1 Shown, a kind of preparation method of magnetic graphite phase carbon nitride material comprises the following steps:

[0043] (1) Mix 30g urea with 1g BaCl 2 After mixing, dissolve in ultrapure water with 1 times the mass of the mixture, stir at room temperature to fully dissolve, and obtain a triazine structure compound solution containing barium ions.

[0044] (2) Place the triazine structure compound solution containing barium ions in a vacuum drying oven at 60° C. and dry until anhydrous to obtain a white solid.

[0045] (3) The white solid was transferred to a crucible, placed in a muffle furnace, and calcined at a high temperature for 5 hours at a heating rate of 4 °C / min and a temperature of 500 °C to prepare barium ion-doped graphite phase nitride by thermal condensation Carbon material; after the reaction, cool to room temperature to obtain light yellow solid powder.

[0046] (4) Add 0.1 mol / L nitric acid solution to the light yellow ...

Embodiment 2

[0057] Embodiment 2 A kind of preparation method of magnetic graphite phase carbon nitride material comprises the following steps:

[0058] (1) Mix 5g melamine with 1g Ba(NO 3 ) 2 After mixing, dissolve in ultrapure water 3 times the weight of the mixture, stir at room temperature to fully dissolve, and obtain a triazine structure compound solution containing barium ions.

[0059] (2) Place the solution of the triazine structure compound containing barium ions in a vacuum drying oven at 80° C. to dry to anhydrous to obtain a white solid.

[0060] (3) The white solid was transferred to a crucible, placed in a muffle furnace, and calcined at a high temperature for 3 hours at a heating rate of 4 °C / min and a temperature of 580 °C to prepare barium ion-doped graphite phase nitride by thermal condensation Carbon material; after the reaction, cool to room temperature to obtain light yellow solid powder.

[0061] (4) Add 2.0 mol / L nitric acid solution to the light yellow solid pow...

Embodiment 3

[0072] Embodiment 3 A kind of preparation method of magnetic graphite phase carbon nitride material, comprises the following steps:

[0073](1) Mix 10g cyanamide with 0.5g Ba(CH 3 COO) 2 After mixing, dissolve in ultrapure water twice the mass of the mixture, stir at room temperature to fully dissolve, and obtain a triazine structure compound solution containing barium ions.

[0074] (2) Place the triazine structure compound solution containing barium ions in a vacuum drying oven at 70° C. and dry until anhydrous to obtain a white solid.

[0075] (3) The white solid was transferred to a crucible, placed in a muffle furnace, and calcined at a high temperature for 4 hours at a heating rate of 4 °C / min and a temperature of 520 °C to prepare barium ion-doped graphite phase nitride by thermal condensation Carbon material; after the reaction, cool to room temperature to obtain light yellow solid powder.

[0076] (4) Add 1.0 mol / L acetic acid solution to the light yellow solid pow...

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Abstract

The invention relates to a magnetic graphite phase carbon nitride material, which refers to a coplanar three-s-triazine with a layered cavity structure and a pore diameter of 2 to 50 nm constructed with barium ions as doped ions as the basic structural unit multi-cluster compounds. At the same time, the invention also discloses the preparation method and application of the material. The invention has a large specific surface area and has anti-radioactive nuclides 210 Pb has the characteristics of strong adsorption and good selectivity.

Description

technical field [0001] The invention relates to the technical field of analysis and detection, in particular to a magnetic graphite phase carbon nitride material and a preparation method and application thereof. Background technique [0002] The development and utilization of mine resources has caused the natural radionuclides present in the minerals to spread to the surrounding area. Among them, radionuclides 210 Pb is often discharged into the nearby surface water system in the form of wastewater, and enters the human body through drinking water and the food chain, causing internal radiation hazards, causing cell damage and canceration in the human body. Therefore, the detection of trace amounts of radionuclides in food and drinking water 210 The detection of Pb is of great significance. However, in complex samples such as food, radionuclides 210 The concentration of Pb is so low that it cannot be directly measured. Therefore, prior to sample detection, the radionucli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/02B01J20/28B01J20/30G01N21/73G01N1/40
CPCB01J20/0259B01J20/28009B01J20/28033B01J20/28083B01J20/3078G01N1/4055G01N21/73G01N2001/4061
Inventor 师彦平康晶燕哈伟
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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