Method for compositing iron oxide and graphene by virtue of hydrothermal process

Abstract

The invention discloses a method for compositing iron oxide and graphene by virtue of a hydrothermal process. The method comprises the following steps: 1) dissolving hexahydrate ferric trichloride and oxidized graphene, (ammonium dihydrogen phosphate and sodium hydroxide) in a certain amount of deionized water to obtain a solution; 2) ultrasonically treating the solution for 1 hour; 3) putting magnetons in the solution and magnetically stirring the solution for 2 hours; 4) pouring the stirred solution into a high-pressure reaction kettle, putting the high-pressure reaction kettle into an electrothermal constant-temperature drying oven and reacting the solution for a period of time at preset temperature; and 5) performing centrifugal washing and vacuum drying to obtain a composite of iron oxide and graphene. The composite precipitate prepared by virtue of the hydrothermal process has controllable particle size, good dispersibility, high utilization rate of sunlight, excellent electronic transmission performance, as well as excellent properties in the application aspects of photo-catalytically degrading organic pollutants and serving as a negative material of a novel lithium battery, thereby having a high industrial production value.

Description

technical field [0001] The invention relates to a method for compounding iron oxide and graphene by a hydrothermal method. Background technique [0002] Combination of iron oxide and graphene and its application in photocatalytic degradation of organic pollutants and as a negative electrode material for lithium batteries have been research hotspots in recent years; among many methods of compounding iron oxide and graphene, hydrothermal It is an extremely simple and efficient method. [0003] Iron oxide (iron oxide) is quite abundant on the surface, it is the main component of rust, widely distributed in water, soil and rocks. Iron oxide is an n-type semiconductor, which is widely used in electrochromic, gas-sensitive sensors and photoelectrochemical devices. Because iron oxide has a narrow band gap width, it has a strong light absorption ability in the visible light region and can absorb Using about 30% of the solar energy, it is of great significance to study the applicat...

AI Technical Summary

Problems solved by technology

Since iron oxide has a wide band gap, it mainly absorbs ultraviolet light in the solar spectrum, which is extremely unfavorable for the use of sunlight with only 4% ultraviolet light content; in addition, the photogenerated electron-hole generated by the excitation of iron oxide by sunlight The high recombination rate leads to low photon quantum efficiency and unremarkable photocatalytic performance, which is also the main reason why iron oxide photocatalysts are limited in practical applications.