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

ABSTRACT: 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 μM, 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.

SUBMITTER: Li F 

PROVIDER: S-EPMC9080339 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature

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A long-persistent phosphorescent chemosensor for the detection of TNP based on CaTiO<sub>3</sub>:Pr<sup>3+</sup>@SiO<sub>2</sub> photoluminescence materials.

Li Fangfang F   Wang Fengyi F   Hu Xuan X   Zheng Baozhan B   Du Juan J   Xiao Dan D  

RSC advances 20180504 30

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 CaTiO<sub>3</sub>:Pr<sup>3+</sup>@SiO<sub>2</sub> nanosensor was successfully developed for the sensitive and selective detection of 2,4,6-trinitrophenol (TNP). The red-emitting phosphorescent chemosensor CaTiO<sub>3</sub>:Pr<sup>3+</sup>@SiO<sub>2</sub> possessed a long enough phosphorescence lifetim  ...[more]

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