Nanomesh Reduction Of Graphene Oxide By Using Inverse Opal Structured Materials Via Electrochemical/Photocatalysis Methods

Graphene has excited scientific and technological communities because of its unique physics and exceptional electronic properties including the high mobility of charge carriers, strong mechanical properties, high electrical conductivity and thermal conductivity. Besides, it also has the flexibility, high optical transparency, large surface area, the integer hall behavior of many excellent physical and chemical properties. Graphene shows a unique value to the field of molecular electronics, micro and nano devices, ultra-high-speed computer chips, high conversion efficiency of photovoltaic cells, solid-state gas sensing sensors, supercapacitors and lithium-ion battery and so on.Graphene is a kind of zero bandgap semiconductor materials. It can’t be made transistor device and achieves the switching characteristics. So it is very important to regulate its band. It has become a core issue of the graphene research areas that how to introduce and adjust the energy gap in graphene, which also will be the basis for the electronic device applications. But it also raises new challenges for the manufacture of graphene.At first, we got ZnO invers opal, TiO2invers opal and ZnO/TiO2heterojunction by using electrochemical and sol-gel method. Through structural characterization, they showed the integrity of the nano-network and very orderly structures.Then, by using the inverse opal structure as a charge transfer path, we achieved electrochemical reduction and photoreduction on the surface of the graphene oxide. By controlling the redox degree, it means that control the time of electrochemical reduction and photocatalysis, we got mesh reduced graphene oxide.Finally, we conducted electrode deposition to graphene partial reduced with nano-network and studied its electrical properties. By controlling the electrochemical reduction of time and the photocatalytic time, we prepared multiple samples, deposited on the aluminum electrodes, and tested the I-V character respectively. The test results showed that the electrical conductivity of nano-network graphene had been greatly improved with the reduction time increasing.