Gold nanoparticle/cerium dioxide quantum dot co-modified graphite phase carbon nitride nanosheet composite material as well as preparation method and application thereof

Abstract

The invention discloses a gold nanoparticle / cerium dioxide quantum dot co-modified graphite phase carbon nitride nanosheet composite material as well as a preparation method and application thereof. The composite material comprises a cerium dioxide quantum dot loaded graphite phase carbon nitride nanosheet and gold nanoparticles modified on the cerium dioxide quantum dot loaded graphite phase carbon nitride nanosheet, the graphite-phase carbon nitride nanosheet loaded with the cerium dioxide quantum dots takes a graphite-phase carbon nitride nanosheet as a carrier, and the cerium dioxide quantum dots are loaded on the graphite-phase carbon nitride nanosheet. The preparation method comprises the step of modifying the gold nanoparticles on the carrier. The composite material disclosed by the invention has the advantages of strong photoelectric capability, high light energy utilization rate, good dispersion performance, high stability and the like, can be widely used for detecting and degrading pollutants in the environment as a functional material, and has very high use value and application prospect. The preparation method of the composite material has the advantages of being simple in process, convenient to operate, low in cost, free of additional chemical auxiliary solvents and the like, is suitable for large-scale preparation and is beneficial to industrial application.

Description

technical field [0001] The invention belongs to the field of material technology, and relates to a functional nanometer material for detecting and degrading pollutants in the environment, in particular to a graphite-phase carbon nitride nanosheet composite material co-modified by gold nanoparticles / ceria quantum dots And its preparation method and application. 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 solar energy and other renewable energy sources. Semiconductor optoelectronic materials can convert low-density solar energy into storable high-density energy, and also 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. Usually, the effect of phot...

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

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