Nitrogen doping

In this work, we aimed to investigate the effect of doping nitrogen on the characteristics and demonstrate the feasibility of improvement of photocatalytic activity of Ti02 under visible light. 

Fig. 4. (a) TEM image of N-doped Y-junction carbon nanotubes prepared by the pyrolysis of a Ni-phthalocyanine-thiophene mixture, (b) EEL spectrum showing the presence of doped nitrogen. 

Doping is an important issue for bulk growth. For n-type doping nitrogen is used while for p-type doping A1 is used. Special care must be taken in Al-doping [34,35]. 

Various preparation methods have been employed to dope nitrogen into T1O2 either based on chemical reactivity (sol-gel synthesis, chemical treatments of the bare oxide, oxidation of titanium nitride, etc.) or on physical methods (ion implantation, magnetron sputtering) [16], These different procedures lead, at least in some cases, to materials with somewhat different chemical and physical properties. In addition to the preparation method, many studies have addressed the electronic states associated to the N-impurities including the questions of localized or delocalized states. 

Acharya, C.K., Sullivan, D.I., and Turner, C.H. (2008) Characterizing the interaction of Pt and PtRu clusters with boron-doped, nitrogen-doped, and activated carbon density functional theory calculations and parameterization./. Phys, Chem. C, 112 (35), 13607-13622. doi 10.102 l/jp8034488... 

Since doped nitrogen plays an essential role in forming the active sites for oxygen reduction catalysts, it is necessary to understand the influence of nitrogen... 

The effects of doping nitrogen into PCM materials, particularly into GST (NGST), has been widely studied experimentally, since its introduction imparts a number of favourable PC characteristics [e.g. [8]] (i) the resistivity of c-GST increases with... 

The doped nitrogen atoms not only provide the anchoring sites for the metal particles but also act as chemically active sites for fuel cell reactions. The N sites in N-CNTs are reported to bind strongly to metals, leading to excellent metal dispersion in metal/N-CNT materials. The surface modifications induced in CNTs by N doping can thus enhance the reactivity and selectivity of carbon-supported catalysts in many catalytic applications [33]. Therefore, it should be possible to avoid functionalization processes that use strong acid treatments, as it is relatively easy to deposit metal catalysts onto N-CNTs [33]. 

Table 10 Ratios of Beryllium Diffusion Coefficients in Doped (Nitrogen, Aluminum, Boron) and Pure SiC...

When a layer of C -N is coated on the surface of graphite, the capacity and cycling behavior of the composite improve, which also shows the favorable effects of the doped nitrogen. 

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