Grapheneoxid, a key derivative of graphene based materials, is an important one. The highly conjugated graphene structure is destroyed in the oxidation process, but the graphene oxide retains unique surface properties and a layered structure. The introduction of oxygen-containing groups not only makes the graphene oxide chemically stable, but also provides surface modification active sites and a larger specific surface area for the synthesis of graphene-based/graphene oxide-based materials. Graphene dioxide is an excellent precursor and support carrier in the synthesis and control of graphene-based materials. When compounding with metals and metal oxides, high-molecular polymers and other materials it can provide a large area for dispersing the attached materials and preventing agglomeration.
Grapheneoxid also exhibits excellent physical, chemical, and electrical properties. The graphene oxide can also be controlled due to the coexistence with various oxygen-containing groups on the base, edges, and graphene sheet framework. This allows for the control of its conductivity, band gap, and type. There are many uses for this material. Grapheneoxid is a new carbon material. It exhibits excellent properties with high specific surface areas and numerous functional groups. The wide variety of graphene-oxide composite materials, which include polymer composites and inorganic compounds materials, has led to the development of a new research focus on grapheneoxid’s surface modification.

1 Optoelectronics
In 2016, Karteri et al. In 2016, Karteri and colleagues studied organic thin-film transistors with SiO2/GO insulating layers, as well as their photoresponse characteristics devices. The characteristics of the transistor were also improved by adding GO to the insulating layers.
2 solar cells
Use GO to replace PEDOT:PSS in hole transport layers for polymer solar cell and achieve the same photoelectric conversion efficiency. Study of the effect of different thicknesses GO layers on polymer-solar cells has been done. The highest photoelectric conversion efficiency is achieved when the thickness of the GO layer is less than 2 nm.
3 Flexible Sensor
Because GO has many hydrophilic functional classes, it can be easily modified. Its high specific surface, good dispersion and good humidity sensitivity make GO an excellent sensor material, especially for flexible sensors.
4 Biological considerations
GO is a unique combination of electronic, optical, and mechanical properties that has been used in many areas, including biotechnology, nanomedicine and tissue engineering, biomedical engineering and biomedical engineering. GO’s specific surface area is larger than other planar or spherical nanomaterials. It can be modified easily and has good biocompatibility. GO and alkene derivatives will have corresponding biological effects due to their surface charges, sizes, lateral dimensions, and surface chemistry. Further research is needed to determine GO’s biosafety. Material science will enable us to use low toxicity materials and better biocompatibility to modify GO. We can prepare GO with stable and clear properties, safe structure, non-toxic, and so be able to use it as a safe, effective, and efficient medical material.

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