Determination of trace amounts of mercury using hierarchically nanostructured europium oxide.
作者： Yanfen Peng , Xiaojun Chen , Zhiqiang Gao
DOI: 10.1016/J.TALANTA.2010.08.011
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摘要: Abstract This work reports a highly sensitive procedure for the determination of trace amounts mercury, based on fluorescence quenching thenoyltrifluoroacetone (TTA) capped hierarchically nanostructured europium oxide (cHN-Eu 2 O 3 ). The HN-Eu consisted nanometer-thick Eu sheets self-organized into nano- and micro-sized monoliths with hierarchical architecture while retaining its desirable properties. intensity cHN-Eu was 1000 times higher than that commercial nanoparticles (equivalent weight) when it TTA, suggesting synergetic effect, confining longtime 3+ excitation within nanostructure light-harvesting effect capping agent, is responsible this enhancement. Excellent interaction between solution species expected owing to large surface area, high surface-to-bulk ratio, ultrahigh intensity. As an example, aqueous suspensions were used as sensing agent mercury. A linear relationship concentration mercury observed from 10 ppb 10 ppm correlation coefficient 0.997 detection limit 5.0 ppb. Mercury in various samples analyzed using suspension.
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