Preparation method and application of two-dimensional porous few-layer g-C3N4 nanosheet photocatalyst

A photocatalyst, g-c3n4 technology, used in physical/chemical process catalysts, catalysts, carbon compound catalysts, etc., can solve the problems of economy and resource waste, and achieve the effect of strong adsorption capacity, high visible light response capacity, and simple operation.

Pending Publication Date: 2020-12-04
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the introduction of porogens and other materials will also bring a lot of economic and resource waste
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Method used

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  • Preparation method and application of two-dimensional porous few-layer g-C3N4 nanosheet photocatalyst
  • Preparation method and application of two-dimensional porous few-layer g-C3N4 nanosheet photocatalyst
  • Preparation method and application of two-dimensional porous few-layer g-C3N4 nanosheet photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) Two-dimensional porous few-layer g-C 3 N 4 Precursor preparation:

[0034] Put 10g of urea into an alumina crucible, heat it in a muffle furnace at a temperature of 550°C, and heat up at a rate of 5°C / min, and calcine it for 4 hours;

[0035] (2) Two-dimensional porous few-layer g-C 3 N 4 Preparation of intermediates:

[0036] A certain amount of g-C3 N 4 The precursor was ultrasonically dispersed in water for 10 minutes, and quickly placed in a liquid nitrogen environment for 30 seconds of freezing treatment, which was recorded as 1 ultrasonic-freezing cycle, and this cycle was repeated 5 times;

[0037] (3) Two-dimensional porous few-layer g-C 3 N 4 Preparation of nanosheet photocatalyst:

[0038] Put the frozen-treated intermediate obtained in step (2) into an alumina crucible, heat it in a muffle furnace at a high temperature of 500°C, and heat up at a rate of 5°C / min, and calcinate it for 2 hours, and name it 5-CN;

[0039] (4) Take the two-dimensional...

Embodiment 2

[0041] (1) Two-dimensional porous few-layer g-C 3 N 4 Precursor preparation:

[0042] Put 10g of urea into an alumina crucible, heat it in a muffle furnace at a temperature of 550°C, and heat up at a rate of 5°C / min, and calcine it for 4 hours;

[0043] (2) Two-dimensional porous few-layer g-C 3 N 4 Preparation of intermediates:

[0044] A certain amount of g-C 3 N 4 The precursor was ultrasonically dispersed in water for 10 minutes, quickly placed in a liquid nitrogen environment and frozen for 30 seconds, recorded as 1 ultrasonic-freezing cycle and repeated this cycle 10 times;

[0045] (3) Two-dimensional porous few-layer g-C 3 N 4 Preparation of nanosheet photocatalyst:

[0046] Put the frozen-treated intermediate obtained in step (2) into an alumina crucible, heat it in a muffle furnace at a high temperature of 500°C, and heat up at a rate of 5°C / min, and calcinate it for 2 hours, and name it 10-CN; (4) Take the two-dimensional porous few-layer g-C in step (3) ...

Embodiment 3

[0048] (1) Two-dimensional porous few-layer g-C 3 N 4 Precursor preparation:

[0049] Put 10g of urea into an alumina crucible, heat it in a muffle furnace at a temperature of 550°C, and heat up at a rate of 5°C / min, and calcine it for 4 hours;

[0050] (2) Two-dimensional porous few-layer g-C 3 N 4 Preparation of intermediates:

[0051] A certain amount of g-C 3 N 4 The precursor was ultrasonically dispersed in water for 10 minutes, quickly placed in a liquid nitrogen environment and frozen for 30 seconds, and underwent 15 ultrasonic-freezing cycles;

[0052] (3) Two-dimensional porous few-layer g-C 3 N 4 Preparation of nanosheet photocatalyst:

[0053] Put the frozen-treated intermediate obtained in step (2) into an alumina crucible, heat it in a muffle furnace at a high temperature of 500°C, and heat up at a rate of 5°C / min, and calcinate it for 2 hours, and name it 15-CN;

[0054] (4) Take the two-dimensional porous few-layer g-C in step (3) 3 N 4 0.03 g and 5 ...

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Abstract

The invention belongs to the technical field of preparation of environmental protection materials, and discloses a preparation method and application of a two-dimensional porous few-layer gC3N4 nanosheet photocatalyst. The method comprises the following steps: preparing a bulk-phase gC3N4 material by using a calcining method, carrying out multiple ultrasonic freezing processes on the bulk-phase gC3N4 as a raw material, and carrying out secondary high-temperature calcining to obtain the two-dimensional porous few-layer gC3N4 nanosheet photocatalyst for photocatalytic reduction of CO2 moleculesin air. The efficient two-dimensional porous few-layer gC3N4 nanosheet photocatalyst is prepared through a simple preparation method and a simple and convenient operation process, resource waste and secondary pollution cannot be caused when the photocatalyst is used, and the photocatalyst is a green, environment-friendly and efficient pollution treatment photocatalyst.

Description

technical field [0001] The invention belongs to the technical field of preparation of environmental protection and energy conversion materials, in particular to a two-dimensional porous few-layer g-C 3 N 4 Preparation method and application of nanosheet photocatalyst. Background technique [0002] The surge in global population, the wanton logging and utilization of fossil energy, and a large number of vehicle exhaust emissions have caused serious greenhouse effects, sea level rise and other energy shortages and environmental pollution problems, which have already attracted the attention of governments and related scientific research fields around the world. Using the increasing concentration of CO in the air every year 2 As a carbon source, molecules react with water molecules to convert them into high-energy and clean hydrocarbon fuels, which has become one of the research hotspots in the fields of energy conversion and environmental protection. Photocatalytic CO 2 Red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B32/40C07C1/02C07C9/04C01B21/082B01J35/10
CPCB01J27/24B01J35/004C01B21/0605C01B32/40C07C1/02B01J35/1004C01P2002/72C01P2002/01C01P2004/03C01P2004/02C07C2527/24C07C9/04
Inventor 李鑫王会琴蒋浩鹏高明朱志马长畅霍鹏伟
Owner JIANGSU UNIV
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