Preparation method of a photocatalytic material grafted with carbon quantum dots on hydroxyapatite
A technology of hydroxyapatite and photocatalytic materials, applied in the field of nanomaterials, can solve the problems that carbon quantum dots are easily affected by the environment, achieve low cost and overcome the effect of easy agglomeration
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Embodiment 1
[0024] Preparation of hydroxyapatite: prepare CaCl according to the ratio of Ca / P to 1.67 2 and Na 2 HPO 4 12H 2 O aqueous solution. 0.5mol / l Na 2 HPO 4 12H 2 Slowly drop the O solution into the vigorously stirred 0.5mol / l CaCl 2 In the solution, use NaOH solution to control the pH value of the reaction system to be about 11. After the titration, continue to stir at room temperature for 1 hour, then put it into a reaction kettle, and keep it warm at 150°C for 15 hours. After centrifugation, washing and drying, the HA powder was obtained. Synthesis of carbon quantum dots: Measure 25 mL of ethylene glycol into a 50 mL polytetrafluoroethylene reactor, heat to 200 ° C for 5 h, and obtain a CQDs solution. Take 20mL of CQDs solution and add it to a 50mL reactor, then add 1072µL of ammonia water, mix well, heat the reactor to 200°C, keep it warm for 5h, and cool at room temperature to obtain carbon dots modified by nitrogen groups (N-CQDs). Grafting hydroxyapatite with carb...
Embodiment 2
[0027] Preparation of hydroxyapatite: prepare CaCl according to the ratio of Ca / P to 1.67 2 and Na 2 HPO 4 12H 2 O aqueous solution. 0.5mol / l Na 2 HPO 4 12H 2 Slowly drop the O solution into the vigorously stirred 0.5mol / l CaCl 2In the solution, use NaOH solution to control the pH value of the reaction system to be about 11. After the titration, continue to stir at room temperature for 1 hour, then put it into a reaction kettle, and keep it warm at 150°C for 15 hours. After centrifugation, washing and drying, HA powder was obtained. Synthesis of carbon quantum dots: Measure 25 mL of ethylene glycol into a 50 mL polytetrafluoroethylene reactor, heat to 200 ° C for 5 h, and obtain a CQDs solution. Take 20mL of CQDs solution and add it to a 50mL reactor, then add 1072µL of ammonia water, mix well, heat the reactor to 200°C, keep it warm for 5h, and cool at room temperature to obtain carbon dots modified by nitrogen groups (N-CQDs). Grafting hydroxyapatite with carbon qu...
Embodiment 3
[0030] Preparation of hydroxyapatite: prepare CaCl according to the ratio of Ca / P to 1.67 2 and Na 2 HPO 4 12H 2 O aqueous solution. 0.5mol / l Na 2 HPO 4 12H 2 Slowly drop the O solution into the vigorously stirred 0.5mol / l CaCl 2 In the solution, use NaOH solution to control the pH value of the reaction system to be about 11. After the titration, continue to stir at room temperature for 1 hour, then put it into a reaction kettle, and keep it warm at 150°C for 15 hours. After centrifugation, washing and drying, HA powder was obtained. Synthesis of carbon quantum dots: Measure 25 mL of ethylene glycol into a 50 mL polytetrafluoroethylene reactor, heat to 200 ° C for 5 h, and obtain a CQDs solution. Take 20mL of CQDs solution and add it to a 50mL reactor, then add 1072µL of ammonia water, mix well, heat the reactor to 200°C, keep it warm for 5h, and cool at room temperature to obtain carbon dots modified by nitrogen groups (N-CQDs). Grafting hydroxyapatite with carbon q...
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