Preparation method of hollow porous prismatic graphite phase carbon nitride

A graphitic carbon nitride, prismatic technology, applied in chemical instruments and methods, catalyst activation/preparation, hydrogen production, etc., can solve the problems of lack of universality of supramolecular precursors and inability to maintain morphology, etc. To achieve the effect of being conducive to separation and migration, improving catalytic performance, and increasing specific surface area

Pending Publication Date: 2020-06-26
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these prismatic or rod-shaped supramolecular precursors either use additives during the formation process, or cannot maintain a good shape in the final calcination of carbon nitride, and do not have the general nitrogen-rich material to form a special structural morphology supramolecular precursor universality

Method used

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  • Preparation method of hollow porous prismatic graphite phase carbon nitride
  • Preparation method of hollow porous prismatic graphite phase carbon nitride
  • Preparation method of hollow porous prismatic graphite phase carbon nitride

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Implementation Example 1: g-C 3 N 4 -12h preparation and photocatalytic performance test

[0037] In the first step, 2 g of melamine was dissolved in 80 mL of deionized water, heated and stirred at 80 °C for 120 min;

[0038] In the second step, pour the reaction solution of the first step into a 200 mL reactor while it is hot, and after 12 h of hydrothermal reaction at 180 °C, cool to room temperature;

[0039] In the third step, after washing the solid obtained in the second step reaction several times, drying at 60° C. to obtain the prismatic supramolecular precursor M-12 h;

[0040] In the fourth step, the prismatic supramolecular precursor obtained in the third step was calcined at 550±10 °C for 8 h to prepare a hollow porous prismatic graphitic carbon nitride g-C 3 N 4 -12h.

[0041] Step 5, weigh 20 mg g-C 3 N 4 -12h In the photocatalytic reaction tank, add 90 mL deionized water, 10 mL triethanolamine and 3 wt.% Pt to produce hydrogen under visible light. ...

Embodiment 2

[0043] Implementation example 2: g-C 3 N 4 -18h preparation and photocatalytic performance test

[0044] In the first step, 2 g of melamine was dissolved in 80 mL of deionized water, heated and stirred at 80 °C for 120 min;

[0045] In the second step, pour the reaction solution of the first step into a 200 mL reaction kettle while it is hot, and after a hydrothermal reaction at 180 °C for 18 h, cool to room temperature;

[0046] In the third step, the solid obtained in the second step reaction is washed several times, and then dried at 60° C. to obtain the prismatic supramolecular precursor M-18 h;

[0047] In the fourth step, the prismatic supramolecular precursor obtained in the third step was calcined at 550±10 °C for 8 h to prepare a hollow porous prismatic graphitic carbon nitride g-C 3 N 4 -18h.

[0048] Step 5, weigh 20 mg g-C 3 N 4 -18h In the photocatalytic reaction tank, add 90 mL deionized water, 10 mL triethanolamine and 3 wt.% Pt to produce hydrogen under ...

Embodiment 3

[0050] Implementation Example 3: g-C 3 N 4 Preparation of -21h and photocatalytic performance test

[0051] In the first step, 2 g of melamine was dissolved in 80 mL of deionized water, heated and stirred at 80 °C for 120 min;

[0052] In the second step, pour the reaction solution of the first step into a 200 mL reactor while it is hot, and after 180 °C hydrothermal reaction for 21 h, cool to room temperature;

[0053] In the third step, the solid obtained in the second step reaction was washed several times, and then dried at 60°C to obtain the prismatic supramolecular precursor M-21 h;

[0054] In the fourth step, the prismatic supramolecular precursor obtained in the third step was calcined at 550±10 °C for 8 h to prepare a hollow porous prismatic graphitic carbon nitride g-C 3 N 4 -21h.

[0055] Step 5, weigh 20 mg g-C 3 N 4 -18h In the photocatalytic reaction tank, add 90 mL deionized water, 10 mL triethanolamine and 3 wt.% Pt to produce hydrogen under visible lig...

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Abstract

The invention discloses a preparation method of hollow porous prismatic graphite phase carbon nitride. The method comprises the following steps: dissolving a nitrogen-rich material in water, heating,dissolving and stirring; pouring the solution obtained after the reaction into a reaction kettle while the solution is hot, and performing hydrothermal treatment at 180 DEG C; washing the obtained solid for multiple times and then drying to obtain a prismatic supramolecular precursor; and finally, roasting at 550 + / -10 DEG C for 8 hours to obtain the hollow porous prismatic graphite phase carbon nitride. According to the hollow porous prismatic graphite phase carbon nitride prepared by the method, the specific surface area is increased, and more active sites are provided; the hollow porous prismatic graphite phase carbon nitride prepared by the method has a hollow prismatic structure and is beneficial to separation and migration of photon-generated carriers, so that the catalytic performance of visible light hydrogen production of original carbon nitride is greatly improved.

Description

technical field [0001] The invention relates to a method for preparing hollow porous prismatic graphite phase carbon nitride, which belongs to the field of nanometer material preparation. Background technique [0002] Facing the reality of today's energy shortage, solar energy has attracted widespread attention because of its characteristics such as easy acquisition, large reserves, and no pollution. But how to apply it more effectively in fields such as energy conversion and environmental pollution, we will still face a severe test. As a semiconductor photocatalyst that plays a decisive role in it, it has been studied in depth by more researchers. [0003] In recent years, since Wang et al first proposed polymer semiconductor graphite phase carbon nitride (g-C 3 N 4 ) as a photocatalyst can decompose water to produce hydrogen under the condition of visible light irradiation, about g-C 3 N 4 There are more and more reports, and remarkable achievements have been made in ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10B01J37/10C01B3/04
CPCB01J27/24B01J37/10C01B3/042B01J35/39B01J35/23B01J35/60Y02E60/36
Inventor 付永胜黄婷汪信朱俊武虞春燕向忆南黄夏露刘冰倩
Owner NANJING UNIV OF SCI & TECH
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