Construction of graphitic carbon nitride/rutile-TiO_2 core-shell nanocone arrays by pulsed laser deposition and plasma sputtering reaction deposition

摘要

Graphitic carbon nitride/rutile-TiO_2 (g-C_3N_4/r-TiO_2) core-shell nanocone arrays are fabricated by pulsed laser deposition of the TiO_2 layers on the g-C3N4 nanocone arrays grown by plasma sputtering reaction deposition. The optical property of the g-C_3N_4/r-TiO_2 core-shell nanocone arrays could be adjusted through altering the TiO_2-deposition duration. The photoluminescence spectra are used to illustrate the effective separation of the photogenerated carriers in the g-C_3N_4 nanocone arrays. On the one hand, the high surface area of the g-C_3N_4 nanocone arrays lead to the outstanding capacity of light harvesting. On the other hand, the band structure of r-TiO_2 is well matched with that of g-C_3N_4, which implements the effective separation of the photogenerated carriers on the interface of the g-C_3N_4/r-TiO_2 heterojunction.