A long-persistent phosphorescent chemosensor for the detection of TNP based on CaTiO3:Pr3+@SiO2 photoluminescence materials

作者：Li, Fangfang; Wang, Fengyi; Hu, Xuan; Zheng, Baozhan; Du, Juan^*; Xiao, Dan^*

来源：RSC Advances, 2018, 8(30): 16603-16610.

DOI：10.1039/c8ra02665c

• EMITTING ELECTROCHEMICAL-CELLS
• CATIO3-PR3+ NANOPARTICLES
• PORTABLE PROTOTYPE
• MASS-SPECTROMETRY
• METAL-COMPLEXES
• TRACE DETECTION
• POLLUTANT TNP
• EXPLOSIVE TNP
• PICRIC ACID
• 2,4,6-TRINITROPHENOL

The detection of nitroaromatic explosives is important due to their strong explosive force and harmfulness in the environment, and for homeland security and public safety. Herein, a phosphorescence CaTiO3:Pr3+@SiO2 nanosensor was successfully developed for the sensitive and selective detection of 2,4,6-trinitrophenol (TNP). The red-emitting phosphorescent chemosensor CaTiO3:Pr3+@SiO2 possessed a long enough phosphorescence lifetime of 0.016 s. The TNP induced phosphorescence quenching process of CaTiO3:Pr3+@SiO2 presented a wide linearity with TNP concentrations ranging from 0.5 to 100 mu M, and the detection limit was found to be 20.6 nM. Furthermore, this sensor displayed a high selectivity toward TNP over other structurally similar compounds like 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (DNT), 4-nitrotoluene (NT), 2,4-dinitrophenol (DNP), 4-nitrophenol (NP) and phenol. This sensing system was successfully used in the test of TNP concentrations in water samples, and showed great potential for practical application.

• 出版日期2018
• 单位四川大学