Preparation and properties of hydrophobic fluorescent composite microspheres based on N-doped carbon quantum dots
N-doped carbon quantum dots(N-CQDs)with yellow-green fluorescence characteristics were prepared by micro wave method using calcium citrate and urea.Polystyrene(PS)microspheres were prepared in nitrogen atmosphere,and then triethoxyvinylsilane and N-CQDs were successfully composited on the surface of the PS microspheres to prepare micro-nano structured superhydrophobic CQDs@PS composite microspheres with fluorescence.The structures and morphologies of the N-CQDs and fluorescent CQDs@PS composite microspheres were characterized by Fourier transform infrared spectrometer,ultraviolet spectrometer,scanning electron microscope and thermogravimetric analyzer.The results showed that the N-CQDs prepared by micro wave method had a conjugated structure,the fluorescent CQDs@PS microspheres exhibited raspberry-like structure,the contact angle could reach 152°,the hydrophobic effect was good,and the thermal stability was improved.
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