Multifunctional composite material with heterostructure and preparation method thereof

Abstract

The invention relates to a multifunctional composite material with a heterostructure as well as a preparation method and application of the multifunctional composite material with the heterostructure, and belongs to the technical field of photocatalysis. The preparation method comprises the following steps of: dissolving an graphene oxide in water, carrying out ultrasonic processing to obtain a graphene oxide dispersion liquid, and dripping a silver nitrate solution into the graphene oxide dispersion liquid while stirring, so as to obtain a mixed solution A; slowly dripping ammonia water into the mixed solution A to obtain a mixed solution B; stirring the mixed solution B, and slowly dripping a disodium hydrogen phosphate solution into the mixed solution B to obtain a mixed solution C; then slowly dripping a P25 solution into the mixed solution C under the magnetic stirring condition to be continuously stirred, transferring the obtained mixed solution C into a hydrothermal reaction kettle, and cooling the obtained mixed solution C till the temperature of the obtained mixed solution C drops to the room temperature after the hydrothermal reaction; and carrying out the vacuum drying on a resultant to obtain a composite material after the resultant is centrifuged and rinsed. The prepared composite material can not only absorb pollutants in water, but can also rapidly degrade organic pollutants of certain concentration under the irradiation of visible light. Moreover, the prepared composite material has efficient broad spectrum sterilization activity to various common bacteria.

Description

technical field [0001] The invention relates to a preparation method of a graphene / silver phosphate cube / titanium dioxide heterostructure multifunctional composite material, in particular to a graphene / silver phosphate cube / titanium dioxide prepared by a hydrothermal method and controlled by ammonia water for morphology and structure The invention discloses a method for multifunctional composite materials with heterogeneous structures, and belongs to the fields of composite materials, biological antibacterial, photocatalytic technology and water pollution control. Background technique [0002] As we all know, titanium dioxide has gained wide attention as a semiconductor photocatalytic material. However, titanium dioxide has a narrow light absorption range (limited to the ultraviolet region), low quantum efficiency, and especially its low response to visible light, which leads to its photocatalytic activity under visible light irradiation. Limited activity; silver phosphate...

AI Technical Summary

Problems solved by technology

[0005] At present, P25, silver nitrate, phosphate and graphene oxide are used as raw materials, and different ratios of ammonia water are used to control the structure and morphology, and the micro-nano Structured graphene / silver phosphate cube / titanium dioxide heterostructure multifunctional composites and their application in photocatalytic degradation of organic pollutants and killing of bacteria and microorganisms have not been reported

Images