Nature has chosen porphyrin as the photosynthetic center for green plants and combine-release oxygen center for heme in their long process of development and evolution. The conjugated macrocycle,which is built by 20 carbon atoms and 4 nitrogen atoms,prospers the whole nature and the chemical research field due to its particular property,so it has attracted more and more attention.Meanwhile,in the inorganic research area,TiO_2 shows all kinds of unique properties and enjoys high popularity in the rese...