| Popis: |
CaTa2O7:Bi nanosheet (BCT-NS) was prepared from aurivillius-structured Bi2CaTa2O9 (BCT) byprotonation and exfoliation treatment. By treating BCT with hydrochloric acid, Bi2O2 layer in BCT wasdissolved, and the amount of Bi was further decreased during the exfoliation treatment. From an EDXanalysis, the doping concentration of Bi in BCT-NS was determined about 0.3 mol%. With excitation 310nm, broad photoluminescence band peaking at 500 nm was observed in the range of 450-650 nm.Fluorescence lifetime measurement monitored at 430, 470, and 530 nm revealed that a single type of Biluminescence center exists in BCT-NS. |
