Red phosphorus/graphite phase carbon nitride composite nanosheet and preparation method and application thereof

A technology of graphite phase carbon nitride and nanosheets, which is applied in the field of photocatalytic materials, can solve the problems of insufficient photoresponse range and photocatalytic performance, achieve high sterilization and hydrogen production efficiency, and reduce production costs

Active Publication Date: 2018-10-26
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of a single photocatalyst in terms of photoresponse range and photocatalytic performance, develop a red phosphorus / graphite phase carbon nitride composite nanosheet photocatalyst, and provide an economical and cheap one-step synthesis method Used to prepare this catalyst, greatly reducing the application cost

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  • Red phosphorus/graphite phase carbon nitride composite nanosheet and preparation method and application thereof
  • Red phosphorus/graphite phase carbon nitride composite nanosheet and preparation method and application thereof
  • Red phosphorus/graphite phase carbon nitride composite nanosheet and preparation method and application thereof

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Embodiment 1

[0029] This example is a specific example of preparing red phosphorus / graphite phase carbon nitride composite nanosheets.

[0030] A red phosphorus / graphite-phase carbon nitride composite nanosheet, the red phosphorus / graphite-phase carbon nitride composite nanosheet is prepared by combining red phosphorus and bulk-phase graphite-phase carbon nitride and adopting an ultrasonic synthesis method.

[0031] The preparation method of described red phosphorus / graphite phase carbon nitride composite nanosheets, comprises the following steps:

[0032] S1. Select a suitable precursor and prepare a bulk graphite phase carbon nitride material by thermal polymerization;

[0033] Specifically: select melamine as the precursor, put 5 g of melamine in a crucible, heat at a constant temperature of 550°C for 2 hours (heating rate 5°C / min), and after the temperature cools down, grind the sample into a yellow powder to obtain graphite phase nitriding Carbon phase material, stored in a desiccato...

Embodiment 2

[0039] This example is a specific example of preparing red phosphorus / graphite phase carbon nitride composite nanosheets.

[0040] A red phosphorus / graphite-phase carbon nitride composite nanosheet, the red phosphorus / graphite-phase carbon nitride composite nanosheet is prepared by combining red phosphorus and bulk-phase graphite-phase carbon nitride and adopting an ultrasonic synthesis method.

[0041] The preparation method of described red phosphorus / graphite phase carbon nitride composite nanosheets, comprises the following steps:

[0042] S1. Select a suitable precursor and prepare a bulk graphite phase carbon nitride material by thermal polymerization;

[0043] Specifically: select melamine as the precursor, put 5 g of melamine in a crucible, heat at a constant temperature of 480°C for 1.5 hours (heating rate 2°C / min), and after the temperature cools down, grind the sample into a yellow powder to obtain graphite phase nitriding Carbon phase material, stored in a desicca...

Embodiment 3

[0049] This example is a specific example of preparing red phosphorus / graphite phase carbon nitride composite nanosheets.

[0050] A red phosphorus / graphite-phase carbon nitride composite nanosheet, the red phosphorus / graphite-phase carbon nitride composite nanosheet is prepared by combining red phosphorus and bulk-phase graphite-phase carbon nitride and adopting an ultrasonic synthesis method.

[0051]The preparation method of described red phosphorus / graphite phase carbon nitride composite nanosheets, comprises the following steps:

[0052] S1. Select a suitable precursor and prepare a bulk graphite phase carbon nitride material by thermal polymerization;

[0053] Specifically: select melamine as the precursor, put 5 g of melamine in a crucible, heat at a constant temperature of 620°C for 2.5 hours (heating rate 10°C / min), and after the temperature cools down, grind the sample into a yellow powder to obtain graphite phase nitriding Carbon phase material, stored in a desicca...

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Abstract

The invention provides a red phosphorus / graphite phase carbon nitride composite nanosheet and a preparation method and an application thereof. The red phosphorus / graphite phase carbon nitride composite nanosheet is prepared by using an elementary substance of red phosphorus and volume phase carbon nitride as raw materials, through a one-step ultrasonic synthesis method. The volume phase carbon nitride is stripped to carbon nitride nanosheets in an ultrasonic process under the auxiliary effect of the red phosphorus, and the red phosphorus is smashed to nano red phosphorus in an ultrasonic waveand loaded on the carbon nitride nanosheet, so the red phosphorus / graphite phase carbon nitride composite nanosheet is formed. The red phosphorus / graphite phase carbon nitride composite nanosheet is capable of realizing the application of performing photocatalytic sterilization in broadband spectrum visible light, and has the capacity of photocatalytic hydrogen generation. A visible-light responserange of a catalyst is greatly expanded through the loading of the red phosphorus, the photocatalytic sterilization efficiency is improved and the catalyst does not contain any metal ingredients. Thepreparation method is simple, and the cost is low. The composite nanosheet has the potential application value in the environmental and clean energy production fields.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a preparation method and application of a non-metallic composite nanosheet catalyst based on red phosphorus and graphite phase carbon nitride. Background technique [0002] Graphite carbon nitride has a unique layered structure and excellent chemical stability, and has been used as a non-metallic photocatalyst in the fields of photocatalytic sterilization and hydrogen production in recent years. However, its low visible light response range (response wavelength below 440nm) severely restricts its utilization of the entire solar spectrum. Therefore, further improving its visible light utilization range and improving its quantum efficiency is an urgent problem to be solved. At the same time, elemental red phosphorus has been found to be an excellent photocatalytic material in recent years. It can respond to light in a range of about 700nm, covering most...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/02A01N59/26A01N59/00A01P1/00A01P3/00C01B3/02
CPCA01N59/00A01N59/26B01J27/24B01J35/004B01J35/023C01B3/02C01B2203/1041
Inventor 王万军安太成李桂英
Owner GUANGDONG UNIV OF TECH
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