A preparation method of water-soluble fluorescent silicon quantum dots and its application in the selective detection of p-nitrophenol
A technology for silicon quantum dots and p-nitrophenol, applied in the selective detection of p-nitrophenol, and the field of preparation of water-soluble fluorescent silicon quantum dots
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[0015] Synthesis of water-soluble cyan fluorescent silicon quantum dots
[0016] 5 mL of ultrapure water was added to the jacketed beaker, 1 mL of 3-aminopropyltriethoxysilane was added under vigorous stirring at 85°C, 2 mL of 50 mM paracetamol solution was added after 10 min, and the reaction was continued for 5 h. Water-soluble cyan fluorescent silicon quantum dots were obtained.
[0017] Fluorescence Properties and Characterization of Silicon Quantum Dots
[0018] figure 1 Influence of storage time for silicon quantum dots on their fluorescence properties. After being stored at 4°C for 70 days, the fluorescence intensity of silicon quantum dots still reached 98.6% of its initial fluorescence intensity, which proved that silicon quantum dots have good stability.
[0019] figure 2 is the effect of pH on its fluorescence intensity. In the investigated pH range, the fluorescence properties of silicon quantum dots did not change significantly.
[0020] image 3 is the e...
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