科研之友
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摘要
Manganese-doped ZnS quantum dots were synthesized through a facile process in aqueous solution using L-cysteine as a surface modifying agent. The quantum dots were characterized by transmission electron microscopy and X-ray diffraction spectroscopy, and had a favorable room-temperature phosphorescence property, with a longer emission time and a narrower emission profile than fluorescence. The phosphorescence was quenched by bisphenol A. Based on these findings, a room temperature phosphorescence quenching method was developed for the sensitive and selective detection of bisphenol A. Under the optimized conditions, the detection limit was 0.2ngmL(-1), and the relative standard deviation was 1.14% (C=10ngmL(-1), n=11). The proposed method was successfully applied to plastic products with satisfactory results. The recovery of the method was in the range of 96% to 106%.
- 出版日期2013-10-13
- 单位山西师范大学
