Pulgarin, C.Castillo, Nikola2007-06-142007-06-142007-06-142007https://infoscience.epfl.ch/handle/20.500.14299/8721TiO2 commercial powder's absorption spectrum broadening towards the visible by N, S, C doping. Preparation, characterization and photocatalytic activitystudent work::semester or other student projects