A new persistent luminescent composite for tracing toxic air particulate matter

作者：Ge, Pinghui; Liang, Yanjie; Cheng, Yuan; Sun, Kangning^*; Liu, Rui

来源：Environmental Chemistry Letters, 2018, 16(4): 1487-1492.

DOI：10.1007/s10311-018-0761-4

• PM2.5
• P
• Persistent luminescence
• Composite
• Simulated imaging
• Tracing

Air pollution is a major health issue, notably due to the presence of potentially toxic particulate matter with a diameter of lower than or equal to 2.5 mu m, named PM2.5.' There is, however, few precise knowledge on the sources, fate and toxicity of particulate matter, notably because there is a lack of method to trace particulate matter in the long term and over large distances. Therefore, we prepared here a novel persistent luminescent tracer composite by incorporating Zn3Ga2GeO8:1%Cr (ZGGO:Cr) persistent luminescence phosphor into PM2.5 precursor followed by freeze drying. Due to a -C=O- chemical bond between PM2.5 and ZGGO:Cr, the obtained composite is well combined and can emit long-lasting persistent emission, of more than 100min, peaking at 696nm, following excitation by a 274nm light. Furthermore, the ZGGO:Cr/PM2.5 composite is performed for simulated 1-cm-thick tissue imaging. The new luminescent PM2.5 composite can be used for environment inspection, imaging, therapy and other complex applications.

• 出版日期2018-12
• 单位北京有色金属研究总院; 山东大学