Aggregation enhanced FRET: A simple but efficient strategy for the ratiometric detection of uranyl ion.

Uranium is one of the most important radionuclides but could also cause potential health risks to human beings due to its radioactive and chemical toxicity. It is an urgent task to develop a simple but efficient sensing platform for UO, the main existing form of uranium in environment. Herein, a rhodamine-functionalized carbon dots (o-CDs-Rho) was synthesized and applied for UO sensing through a simple but novel aggregation-enhanced FRET strategy.

[Applying Photochemical Indicators to Analyze Ozone Sensitivity in Handan].

Ozone pollution in Handan has become severe in recent years and in the summer of 2018, the average maximum daily 8-hour average ozone concentration in Handan was 175 μg·m with a maximum of 257 μg·m. Ozone concentrations exceeded the National Air Quality Grade Ⅱ Standard in 59% of cases. In this study, the HO/HNO indicator was applied to analyze summertime ozone sensitivity in Handan using the WRF-CMAQ modeling system.