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A kind of amino-rich graphitic carbon nitride and preparation method thereof

A graphitic carbon nitride, amino-rich technology, applied in chemical instruments and methods, nitrogen compounds, nitrogen-metal/silicon/boron binary compounds, etc., can solve problems such as limiting the scope of application, increasing special functions, and low amino content , to achieve the effect of expanding the scope of application, reducing the degree of thermal oxidation, and increasing the content of amino groups

Active Publication Date: 2020-07-03
DONGHUA UNIV
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  • Claims
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Problems solved by technology

[0004] Another method is to directly heat cyanamide to 500-600°C in air or nitrogen and keep it warm. The graphite-like carbon nitride prepared by this method, due to the rapid heating process, leads to oxygen in the air. The thermal oxidation effect of carbon dioxide is very obvious, so that the original amino group is oxidized in large quantities, and the amino group content in the final carbon nitride product is small, which makes it difficult to further modify it, increase its special function, and limit its application range

Method used

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  • A kind of amino-rich graphitic carbon nitride and preparation method thereof
  • A kind of amino-rich graphitic carbon nitride and preparation method thereof
  • A kind of amino-rich graphitic carbon nitride and preparation method thereof

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Embodiment 1

[0032] A preparation method of amino-rich graphitic carbon nitride, the steps are as follows:

[0033] 1) First heat cyanamide to 330°C at a heating rate of 13.5°C / min and keep it warm for 10 hours;

[0034] 2) Then raise the temperature to 480°C at a heating rate of 12°C / min and keep it warm for 11 hours;

[0035] 3) Then raise the temperature to 500°C at a heating rate of 0.5°C / min and keep it warm for 3 hours;

[0036] 4) The final collected product is amino-rich graphitic carbon nitride.

[0037] The nitrogen content of the obtained amino-rich graphitic carbon nitride is 66.5wt%, and its chemical structure is rich in amino groups, such as figure 1 The shown Fourier transform infrared spectrum is at 2700-3400cm -1 It can be proved by the broad absorption peak at the position that the prepared amino-rich graphitic carbon nitride contains a graphite-like structure, which can also be proved by the sharp peaks near 13.5° and 27.5° in the X-ray diffraction pattern, such as ...

Embodiment 2

[0039] A preparation method of amino-rich graphitic carbon nitride, the steps are as follows:

[0040] 1) First heat dicyandiamine to 350°C at a heating rate of 22°C / min and keep it warm for 5 hours;

[0041] 2) Then raise the temperature to 490°C at a heating rate of 19°C / min and keep it warm for 8 hours;

[0042] 3) Then raise the temperature to 530°C at a heating rate of 11.5°C / min and keep it warm for 9 hours;

[0043] 4) The final collected product is amino-rich graphitic carbon nitride.

[0044] The nitrogen element content of the prepared amino-rich graphitic carbon nitride is 67.3 wt%, and its chemical structure is rich in amino groups, and the prepared amino-rich graphitic carbon nitride has a graphite-like structure. In addition, the 5wt% thermal weight loss temperature of the prepared amino-rich graphitic carbon nitride is 592°C.

Embodiment 3

[0046] A preparation method of amino-rich graphitic carbon nitride, the steps are as follows:

[0047] 1) First heat the melamine to 300°C at a heating rate of 5°C / min and keep it warm for 6 hours;

[0048]2) Then raise the temperature to 400°C at a heating rate of 3.5°C / min and keep it warm for 10 hours;

[0049] 3) Then raise the temperature to 550°C at a heating rate of 18°C / min and keep it warm for 2 hours;

[0050] 4) The final collected product is amino-rich graphitic carbon nitride.

[0051] The nitrogen element content of the prepared amino-rich graphitic carbon nitride is 66 wt%, and its chemical structure is rich in amino groups, and the prepared amino-rich graphitic carbon nitride contains a graphite-like structure. In addition, the 5wt% thermal weight loss temperature of the prepared amino-rich graphitic carbon nitride is 586°C.

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Abstract

The invention relates to a rich-amino quasi-graphite carbon nitride and a preparation method thereof. The preparation method includes: heating raw materials to 300-400 DEG C by a certain heating rate,and keeping the temperature; then raising the temperature to 400-500 DEG C by the same heating rate, and keeping the temperature; finally, raising the temperature to 500-600 DEG C by the same heatingrate, and keeping the temperature, so that an obtained product is the rich-amino quasi-graphite carbon nitride. The raw materials include more than one of cyanamide, cyanoguanidine, melamine, urea and guanidine hydrochloride. The rich-amino quasi-graphite carbon nitride is in nitrogen element content of 66-68wt% and chemically structurally rich in amino, the rich-amino quasi-graphite carbon nitride contains a graphite shaped structure according to XRD detection, and 5wt% thermal weight loss of the rich-amino quasi-graphite carbon nitride is higher than or equal to 580 DEG C. The preparation method is simple in process, the product is rich in amino, further modification of quasi-graphite carbon nitride is benefited, and an application range of quasi-graphite carbon nitride is expanded.

Description

technical field [0001] The invention belongs to the field of functional polymer materials, and relates to an amino-rich graphite carbon nitride and a preparation method thereof. Background technique [0002] Graphite-like carbon nitride is a popular new material that has emerged in recent years. It has many advantages such as metal-free photocatalysis, visible light response, and high thermal stability. Theoretically, pure carbon nitride does not contain amino groups, and its nitrogen content is 60.8wt%. [0003] The preparation method of graphite-like carbon nitride is divided into two types according to the different methods used. One is to use carbon tetrachloride and ethylenediamine as precursors, and mesoporous silicon oxide as a hard template to make it through nano-casting. The carbon nitride produced by this method has a ratio of C and N much greater than the theoretical 0.75, mostly between 3 and 5, and is rich in C elements. At present, this method is no longer us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B21/06
CPCC01B21/0605C01P2002/72C01P2002/82C01P2002/88
Inventor 郭承鑫彭治汉杜国毅李换换王朝生秦铭骏翟一霖刘会阳
Owner DONGHUA UNIV
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