A kind of preparation method of graphene/tin dioxide quantum dot composite material
A technology of tin dioxide and composite materials, applied in graphene, tin oxide, nanotechnology for materials and surface science, etc., can solve problems such as cumbersome methods, insufficient uniformity of composite materials, and inability to control product morphology, etc. The effect of avoiding secondary accumulation, favorable for carrier exchange, and good application prospect
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[0016] A kind of rapid preparation method of graphene / tin dioxide quantum dot composite material, concrete steps are:
[0017] Ultrasonic disperse a certain amount of graphene oxide in deionized water; add a certain amount of tin tetrachloride, mix well; add a certain amount of hydrazine hydrate, stir and mix; transfer the obtained liquid to a microwave digestion apparatus for microwave hydrothermal reaction The graphene / tin dioxide quantum dot composite material is obtained.
Embodiment 1
[0019] Ultrasonic disperse 10 mg graphene oxide in 50 mL deionized water; add 700 mg SnCl 4 ·H 2 O, stirred for 10 min; added 0.5 mL of hydrazine hydrate with a concentration of 80%, and continued to stir for 10 min; transferred the above solution into a polytetrafluoroethylene lining, and placed it in a microwave digestion system for reaction at a reaction temperature of 140°C for 60min. The product was collected by centrifugation and washed several times with deionized water and ethanol to obtain a graphene / tin dioxide quantum dot composite material.
[0020] The product is characterized by X-ray diffraction pattern, the result is as follows figure 1 As shown, it can be seen that all the diffraction peaks on the spectrum correspond to tetragonal tin dioxide, and its JCPDS card number is 41-1445. From the spectrum, we did not observe obvious diffraction peaks of graphene, which is due to the low content of graphene in the composite material and the low intensity of its dif...
Embodiment 2
[0024] Ultrasonic disperse 50mg of graphene oxide in 50mL of deionized water; add 500mg of SnCl to the above dispersion 4 ·H 2 O, stir for 10 min; add 1 mL of hydrazine hydrate with a concentration of 80% to the obtained solution, and continue stirring for 10 minutes; transfer the above solution into a polytetrafluoroethylene liner with a volume of 100 mL, and place it in a microwave digestion system for reaction , the reaction temperature is 160° C., and the time is 20 min.
[0025] The product was collected by centrifugation and washed several times with deionized water and ethanol to obtain a graphene / tin dioxide quantum dot composite material, whose appearance and structure were similar to those in Example 1.
[0026] In addition to the above implementation example, other experiments have also been carried out, and the morphology and structure of the resulting material are also similar to the implementation example, wherein the mass ratio of graphene oxide to hydrazine hy...
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