The Study Of Luminescesnce And Antibacterial Performance Of Perovskite Impacted By Ag⁺ And Pr³⁺ Ions

CaTiO₃:Pr³⁺red-emitting phosphor can emit high purity of red-light,which is an excellent long afterglow luminescence material and has broadly application in dark field moist multi-bacterial environment.However,the bacterial is easily reproduced in the moist environment,which has a significant negative effect to health of human beings.Coating-Ag⁺antibacterial materials have many advantages,such as strong antibacterial capacity,high efficiency,secure,and have many applications in a great many fields such as medicine and ceramics.In this paper,the study of Ag⁺/CaTiO₃:Pr³⁺multi-functional material with luminescence and antibacterial properties is based on this application background.Photoluminescence spectroscopy?PL?,X-ray powder diffraction?XRD?,scanning electron microscopy?SEM?,specific surface area analysis?BET?and inhibition method were applied to investigate long afterglow photoluminescence properties and microstructure and antibacterial properties of our samples.Based on the red-emitting CaTiO₃:Pr³⁺supporter,the Ag⁺/CaTiO₃:Pr³⁺multi-functional materials with luminescence and antibacterial properties were synthesized by the low temperature coating approach,the effect of Ag⁺coating to the luminescence and antibacterial properties were investigated by the spectrofluorimetry and antibacterial experiments.Initially,we systematically investigated the most important factor,such as sintering temperature,holding time and concentration of Pr³⁺,to the CaTiO₃:Pr³⁺that synthesized by the combustion method.The synthesized temperature region is from700 to 1000oC,synthesized holding time region is 30 min¹20 min and the concentration region of Pr³⁺is 0.1%⁰.6%mol,we could synthesized the optimized sample on condition that the synthesized temperature of 800oC,holding time of 60min and the concentration of Pr³⁺is 0.2%mol.High-purity and the maximum red emission intensity of CaTiO₃:Pr³⁺long afterglow luminescence material could be synthesized by the optimized experimental condition.Our experimental results indicate that the Ag⁺-coating has significant influence to the red emission and afterglow time of Ag⁺/CaTiO₃:Pr³⁺.The red emission intensity and afterglow time of Ag⁺/CaTiO₃:Pr³⁺were both decreased but still had clear red emission in the dark field on condition that the coating concentration of Ag⁺in the region of 0%¹%.Through serious antibacterial experiments of colibacillus and staphylococcus aureus by the inhibition approach,the experimental results indicate that the synthesized temperature,holding time,concentration of Pr³⁺and Ag⁺,the coating temperature of Ag⁺and coating time has critical effect to the antibacterial property.ThehighpurityandexcellentluminescenceAg⁺/CaTiO₃:Pr³⁺antibacterial-luminescence multi-functional materials could be synthesized on condition that the optimized experimental condition:synthesized temperature of 800oC and holding time of 60 min,and the concentration of Pr³⁺and Ag⁺is 0.2%mol and1%mol,respectively.This made Ag⁺/CaTiO₃:Pr³⁺a promising material in the application of dark field moist multi-bacterial environment.