A significant contributor to particulate matter (PM), dust particles negatively affect air quality and pose serious health risks, such as cardiovascular and respiratory issues. Therefore, it is crucial to accurately and efficiently detect dust particles to monitor air pollution and reduce its harmful effects. This research involved synthesising carbon quantum dots (CQDs) from citric acid and urea using microwave-assisted irrad...

This study presents a rapid, green, and highly sensitive fluorescence-based method for detecting urea in soil using nitrogen-doped carbon dots (CDs) synthesized via a microwave-assisted process. Citric acid and urea were used as carbon and nitrogen precursors, respectively, with optimal synthesis achieved at a 1:1 weight ratio and 9 min of microwave irradiation. The structural properties of nitrogen-doped carbon dots (CDs) wer...