MOO for highly sensitive surface-enhanced Raman spectroscopy detection 2 Quantum dot synthesis method
A surface-enhanced Raman and spectroscopic detection technology, used in nanotechnology, measurement devices, Raman scattering, etc. for materials and surface science, can solve the problem of high price of precious metal particles, easy particle accumulation, and limitation of SERS. Widespread application and other problems, to achieve the effect of strong operability, high degree of crystallization, and high melting point
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Embodiment 1
[0019] Stir 0.2g of molybdenum acetylacetonate with 12g of propanol and 12g of deionized water on a magnetic stirrer for 2 hours, then take a solution prepared from 0.2g of glucose, stir for 0.5 hours, and transfer the resulting suspension solution into polytetrafluoroethylene In the lined autoclave, place it in an electric heating drum and air drying oven, raise the temperature to 140°C and keep it for 8 hours, then take out the reaction kettle and cool it to room temperature. Pour the solution in the autoclave liner into a 50 mL centrifuge tube. The solution in the centrifuge tube was washed 3 times with absolute ethanol, and a black precipitate was obtained by centrifugation. The final samples were dried in a vacuum oven at 50 °C. After the obtained product was characterized by XRD, confocal Raman microscope, SEM, TEM and EDX, MoO 2 Quantum dots are used as SERS substrates, and the detection concentration limit of analyte molecules reaches 10 -8 M.
Embodiment 2
[0021] Stir 0.6g of molybdenum acetylacetonate with 36g of propanol and 36g of deionized water on a magnetic stirrer for 2 hours, then take a solution prepared from 0.2g of glucose, stir for 0.5 hours, and transfer the resulting suspension solution into polytetrafluoroethylene In the lined autoclave, place it in an electric heating drum and air drying oven, raise the temperature to 180°C and keep it for 8 hours, then take out the reaction kettle and cool it to room temperature. Pour the solution in the autoclave liner into a 50 mL centrifuge tube. The solution in the centrifuge tube was washed 3 times with absolute ethanol, and a black precipitate was obtained by centrifugation. The final samples were dried in a vacuum oven at 50 °C. After the obtained product was characterized by XRD, confocal Raman microscope, SEM, TEM and EDX, MoO 2 Quantum dots are used as SERS substrates, and the detection concentration limit of analyte molecules reaches 10 -8 M.
Embodiment 3
[0023] The difference from Example 2 is: the temperature is raised to 200° C. and kept for 12 hours.
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