Preparation method for polymerizing titanium dioxide by graphene oxide in situ

Abstract

The invention discloses a preparation method for polymerizing titanium dioxide by graphene oxide in situ. The method comprises the following steps: preparing graphene oxide suspension liquid; pouring metatitanic acid into the graphene oxide suspension liquid, adding a hydrogen peroxide solution at the concentration of 30 percent slowly and dropwise, stirring, adding ammonia water dropwise to adjust the ph value to be 8.5 to 10, and stirring for 3 to 10 hours to obtain titanium peroxide and graphene oxide sol, wherein the mass ratio of the metatitanic acid to the hydrogen peroxide solution to the graphene oxide suspension liquid is (5-7):(40-60):(100-105); performing heat preservation on the obtained titanium peroxide and graphene oxide sol at 80 to 120 DEG C for 4 to 24 hours; adding the ammonia water into the heated titanium peroxide and graphene oxide sol dropwise to enable the graphene oxide to polymerize the titanium dioxide to separate out of the solution, and filtering and drying to obtain the graphene oxide polymerized doped titanium dioxide. The hydroxyl and the carboxyl on the surface of the graphene oxide and the hydroxyl of the titanium peroxide can perform hydroxyl shrinking reaction or dehydration reaction under the hydrothermal action, so the in-situ polymerization of the titanium dioxide on the surface of the graphene oxide is realized.

Description

technical field [0001] The invention relates to a preparation method, in particular to a preparation method of in-situ graphene oxide polymerized titanium dioxide. Background technique [0002] Graphene has a wide range of applications. According to graphene's ultra-high strength and ultra-thin characteristics, graphene can be widely used in various fields, such as ultra-thin and ultra-light aircraft materials, ultra-light body armor, etc. According to its excellent conductivity, it also has great application potential in the field of microelectronics. Graphene may become a substitute for silicon, making ultra-miniature transistors, used to produce future supercomputers, and the higher electron mobility of carbon can enable future computers to achieve higher speeds. In addition, graphene materials are also excellent modifiers. In new energy fields such as lithium-ion batteries and super capacitors, they can be used as electrode material additives due to their high conducti...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to add graphene to titanium dioxide gel and mix, which is not easy to disperse, and the effect of mixing with titanium dioxide gel is relatively poor. The purpose is to provide a kind of preparation method of in-situ graphene oxide polymerized titanium dioxide, which can Graphene oxide and titanium dioxide are fully mixed to improve the doping purpose