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Graphite phase carbon nitride nanosheet composite material co-modified by gold nanoparticles/ceria quantum dots and its preparation method and application

A graphite phase carbon nitride and gold nanoparticle technology, applied in the field of materials, can solve the problems of reduced redox ability of photogenerated electron holes, upward shift of valence band position, and downward shift of conduction band position, so as to improve photocatalytic effect, Improved absorbency and high controllability

Active Publication Date: 2022-06-28
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, existing g-C 3 N 4 Although semiconductor nanocomposites can enhance electron conversion efficiency to a certain extent, their simple type II structure makes the position of the valence band move up and the position of the conduction band move down, resulting in a decrease in the redox ability of photogenerated electron holes, which is of great importance. g-C 3 N 4 Wide application of composite materials

Method used

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  • Graphite phase carbon nitride nanosheet composite material co-modified by gold nanoparticles/ceria quantum dots and its preparation method and application
  • Graphite phase carbon nitride nanosheet composite material co-modified by gold nanoparticles/ceria quantum dots and its preparation method and application
  • Graphite phase carbon nitride nanosheet composite material co-modified by gold nanoparticles/ceria quantum dots and its preparation method and application

Examples

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Embodiment 1

[0036] A gold nanoparticle / ceria quantum dot co-decorated graphitic carbon nitride nanosheet composite (CeO 2 QDs / Au / g-C 3 N 4 ), including the graphite phase carbon nitride nanosheets loaded with ceria quantum dots, the graphite phase carbon nitride nanosheets loaded with ceria quantum dots are decorated with gold nanoparticles, and the graphite phase carbon nitride nanosheets loaded with ceria quantum dots are decorated with gold nanoparticles. The carbon nanosheet is based on a graphite phase carbon nitride nanosheet as a carrier, and ceria quantum dots are supported on the graphite phase carbon nitride nanosheet.

[0037] In this example, the mass percentage of gold nanoparticles in the graphitic carbon nitride nanosheet composite material co-modified by gold nanoparticles / ceria quantum dots is 5%; The mass percentage content of ceria quantum dots in the carbon nanosheet is 10%.

[0038] In this embodiment, the particle size of the ceria quantum dots is less than or equ...

Embodiment 2

[0054] A graphitic carbon nitride nanosheet composite material co-modified with gold nanoparticles / ceria quantum dots, and graphitic carbon nitride nanosheets co-modified with gold nanoparticles / ceria quantum dots in Example 1 Composite (CeO 2 QDs / Au / g-C 3 N 4 ) are basically the same, the only difference is that the mass percentage of gold nanoparticles in the graphite phase carbon nitride nanosheet composite material co-modified with gold nanoparticles / ceria quantum dots in Example 2 is 10%.

Embodiment 3

[0056] A graphitic carbon nitride nanosheet composite material co-modified with gold nanoparticles / ceria quantum dots, and graphitic carbon nitride nanosheets co-modified with gold nanoparticles / ceria quantum dots in Example 1 Composite (CeO 2 QDs / Au / g-C 3 N 4 ) are basically the same, the only difference is that the mass percentage of gold nanoparticles in the graphite phase carbon nitride nanosheet composite material co-modified with gold nanoparticles / ceria quantum dots in Example 3 is 15%.

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Abstract

The invention discloses a graphite phase carbon nitride nanosheet composite material co-modified by gold nanoparticles / ceria quantum dots and its preparation method and application. The composite material includes graphite phase carbon nitride loaded with cerium oxide quantum dots The nanosheet and the gold nanoparticle modified thereon; the graphite phase carbon nitride nanosheet loaded with ceria quantum dots is based on the graphite phase carbon nitride nanosheet as a carrier, and the ceria quantum dot is loaded on it. The preparation method includes modifying the gold nanoparticles on the carrier. The composite material of the invention has the advantages of strong photoelectric ability, high utilization rate of light energy, good dispersion performance, high stability, etc. As a functional material, it can be widely used to detect and degrade pollutants in the environment, and has high use value and application prospect. The preparation method of the composite material of the present invention has the advantages of simple process, convenient operation, low cost, no need to add additional chemical auxiliary solvents, etc., is suitable for large-scale preparation, and is beneficial to industrial application.

Description

technical field [0001] The invention belongs to the technical field of materials, relates to a functional nanomaterial for detecting and degrading pollutants in the environment, and particularly relates to a graphite phase carbon nitride nanosheet composite material jointly modified by gold nanoparticles / ceria quantum dots and preparation method and application thereof. Background technique [0002] In recent years, facing the severe challenges of energy crisis and environmental degradation, more and more researchers have turned their attention to renewable energy sources such as solar energy. Semiconductor optoelectronic materials can convert low-density solar energy into storable high-density energy. It can make full use of solar energy to degrade and mineralize pollutants in the environment, has the characteristics of low cost and environmental friendliness, and has important application prospects in solving energy and environmental problems. In general, the effect of ph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J35/00B01J37/16B01J37/34G01N27/30G01N27/36C02F1/30C02F101/38
CPCB01J27/24B01J35/004B01J37/16B01J37/344B01J35/0033G01N27/36G01N27/305C02F1/30C02F2305/10C02F2101/38
Inventor 汤琳欧阳细莲彭博朱旭谭集穗
Owner HUNAN UNIV
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