About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
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Synthesis, Characterization, Modeling and Applications of Functional Porous Materials
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Presentation Title |
Luminescent Tb3+-Doped Fluorapatite/Agar Nanocomposite for Detecting UO22+, Cu2+, and Cr3+ Ions |
Author(s) |
Yuanbing Mao, Hongjuan Liu |
On-Site Speaker (Planned) |
Yuanbing Mao |
Abstract Scope |
Radionuclides and heavy metal ions are main harmful pollutants in the environment. Developing sensitive and rapid methods to detect them from natural or waste waters is important to reduce their exposure risks. In this study, a novel luminescent Tb3+-doped fluorapatite/agar nanocomposite (Tb-FAP/agar) has been synthesized via a facile and green synthetic route through an environmentally friendly biomineralization process using agar as a template. The nanocomposite is the first luminescent fluorapatite for detecting UO22+, Cu2+, and Cr3+ ions in water with high selectivity and sensitivity based on luminescence turn-off effects. The detection limits of the Tb-FAP/agar for UO22+ (7.95 nM), Cu2+ (3.94 nM), and Cr3+ (1.67 nM) are much lower than the permissible limits in drinking water defined by EPA. Furthermore, the luminescent detection mechanisms for UO22+, Cu2+, and Cr3+ ions were speculated. Our study provides insight into developing biodegradable rare earth doping fluorapatite probe for both radioactive and nonradioactive ions. |