Good Electron Conductivity Used Nitrogen Doped Carbon Nanotubes
Nitrogen, boron and phosphorus and carbon atoms similar size, there may be inserted into the graphite structure, thereby altering the chemical, mechanical and electrical properties of carbon nanotubes. In particular, nitrogen-doped carbon nanotubes having n-type doping, the electron density changes around a nitrogen atom, it has a good electron conductivity, which are also aspects of the electronic effect of the catalytic material exhibits unique properties.
Nitrogen doping methods: nitrogen atoms in the carbon nanotubes doped with built-in, replace the formula and graft type, and so, we are using the graft type. Grafting reaction in the formula is a nitrogen-containing walls of carbon nanotubes modified by a chemical group, such as a nitrogen group, amino acid group and the like.
Preparation: chemical vapor deposition method. Chemical vapor deposition produced nitrogen-doped mass fraction is relatively low, usually around 3.5%. Difficult to achieve even higher levels.
The nitrogen-doped carbon nanotubes as catalyst supports in direct catalytic and catalytic, super capacitors and power of heterogeneous catalysis to extensive research, especially showing good performance when used as a catalyst carrier. Nitrogen surface of carbon nanotubes can improve the dispersion of metal nanoparticles and enhanced carrier interaction with the active site.
