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Nitrogen-doped TiO2 nanoparticles coated with N-doped carbon are prepared by simply hydrolyzing tetrabutyl titanate to obtain TiO2 nanoparticles followed by heating the mixture of nanoparticles and urea at 550°C for 5h. The combination of simultaneously N-doping with coating carbon results in the enhancement in electronic and ionic conductivities, thus the modified TiO2 exhibits outstanding reversible...
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