A method for laser synthesis of magnetic graphene-peg-γ-Fe2O3 composites
A magnetic graphene, laser synthesis technology, applied in pharmaceutical formulations, preparations for in vivo experiments, MRI/MRI contrast agents, etc., can solve the problems of complex experimental steps, low yield, cytotoxicity, etc., and achieve simple The effect of the synthesis process
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Embodiment 1
[0019] This embodiment provides a method for synthesizing graphene-PEG-γ-Fe by nanosecond laser ablation in liquid phase 2 o 3 A compound method comprising the steps of:
[0020] (1) Using a block iron target with a purity of 99.9% as a raw material, polish the surface of the target with sandpaper, and ultrasonically clean it with dilute hydrochloric acid to remove its oxide layer; then ultrasonically clean the surface of the iron target twice with deionized water to remove Residual dilute hydrochloric acid, then dry the iron target for use;
[0021] (2) Put the dry iron target in a 50 ml beaker, add 20 ml of graphene-PEG solution with a concentration of 0.2 mg / mL, so that the liquid level above the iron target is 0.5-1.5 cm;
[0022] (3) Start the nanosecond laser, and use focused light with a wavelength of 1064 nanometers to ablate the iron target in step (2), wherein the laser energy, frequency, and action time are 180-250 mJ, 10-15 Hz, 30- 40 minutes; the target is move...
Embodiment 2
[0025] This embodiment provides a method for synthesizing graphene-PEG-γ-Fe by nanosecond laser ablation in liquid phase 2 o 3 A compound method comprising the steps of:
[0026] (1) Using a block iron target with a purity of 99.9% as a raw material, polish the surface of the target with sandpaper, and ultrasonically clean it with dilute hydrochloric acid to remove its oxide layer; then ultrasonically clean the surface of the iron target twice with deionized water to remove Residual dilute hydrochloric acid, then dry the iron target for use;
[0027] (2) Put the dry iron target in a 50 ml beaker, add 20 ml of graphene-PEG solution with a concentration of 0.5 mg / mL, so that the liquid level above the iron target is 0.5-1.5 cm;
[0028] (3) Start the nanosecond laser, and use focused light with a wavelength of 1064 nanometers to ablate the iron target in (2), where the laser energy, frequency, and action time are 180-250 mJ, 10-15 Hz, 30-40 Minutes; the target was moved every 2...
Embodiment 3
[0031] This embodiment provides a method for synthesizing graphene-PEG-γ-Fe by nanosecond laser ablation in liquid phase 2 o 3 A compound method comprising the steps of:
[0032] (1) Using a block iron target with a purity of 99.9% as a raw material, polish the surface of the target with sandpaper, and ultrasonically clean it with dilute hydrochloric acid to remove its oxide layer; then ultrasonically clean the surface of the iron target twice with deionized water to remove Residual dilute hydrochloric acid, then dry the iron target for use;
[0033] (2) Put the dry iron target in a 50 ml beaker, add 20 ml of graphene-PEG solution with a concentration of 0.8 mg / mL, so that the liquid level above the iron target is 0.5-1.5 cm;
[0034] (3) Start the nanosecond laser, and use focused light with a wavelength of 1064 nanometers to ablate the iron target in (2), where the laser energy, frequency, and action time are 180-250 mJ, 10-15 Hz, 30-40 Minutes; the target was moved every...
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