Because graphene is no bandgap, making its conductivity is not the same as a conventional semiconductor completely controlled, and the graphene surface smooth and inert, is not conducive to the composite and other materials, thus impeding the application of graphene.
Hetero atom doping is another effective method for graphene biosensor to improve performance, in which the nitrogen atom in the regulation of carbon-doped material electronic properties play an important role. Scientists graphene nitrogen plasma treatment to prepare nitrogen-doped graphene, this nitrogen-doped graphene reduction of H2O2 showed a high electrocatalytic activity, and to achieve a rapid GOx of direct electron transfer. Nitrogen-doped graphene bandgap can open and adjust the conductivity type, change the electronic structure of graphene to improve the free carrier density graphene to improve conductivity and stability of graphene, in addition, graphene carbon network Introduced nitrogen atom lattice structure, can increase the graphene surface adsorption active sites of the metal particles, thereby enhancing the interaction between the metal particles and graphene.
The role of nitrogen-doped graphene can be introduced in a carbon grid nitrogen-containing functional groups, these functional groups can become active adsorption of metal particles, thereby enhancing the interaction between the metal and the graphene, they can make graphene performance greatly improved, resulting in wide range of applications. Especially as the use of lithium ion batteries, lithium-air battery and supercapacitor electrode materials and fuel cell oxygen reduction catalysts and other new energy materials. In the lithium-ion batteries by doping nitrogen in graphene can throw maintain a high irreversible capacity, etc. at a high charge and discharge rate.
Nitrogen-doped graphene has a high oxygen reduction activity under alkaline conditions. In alkaline fuel cell test found in a wide voltage range of the steady-state catalytic current nitrogen doped graphene electrode is 5 times that of conventional electrodes and a more long-term stability.
In addition, the electrode material can also be used graphene ultracapacitors and other nitrogen doping.
Related articles: http://www.hwnanomaterial.com/Good-Electron-Conductivity-Used-Nitrogen-Doped-Carbon-Nanotubes_p574.html