Silver chalcogenide-iron carbide heterogeneous nanostructure and preparation method and application thereof
A technology of chalcogenides and nanostructures, applied in the field of materials
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Embodiment 1
[0030] (1) Preparation of silver sulfide quantum dots;
[0031] 25.6 mg of silver diethyldithiocarbamate was dissolved in 10 g of 1-dodecanethiol, and the system was heated to 210 degrees Celsius under a high-purity argon atmosphere and kept for 1 hour. After the system was cooled to room temperature, after the system was cooled to room temperature, 60 ml of absolute ethanol was added, and centrifuged at 8000 rpm for 3 minutes to obtain silver sulfide quantum dots. The prepared silver sulfide quantum dots were dispersed in n-hexane for use.
[0032] (2) Preparation of silver sulfide-iron carbide heterogeneous nanoparticles;
[0033] Silver sulfide-iron carbide heteronanoparticles were synthesized by a simple seed growth method. 1 ml of silver sulfide quantum dots (10 mg / ml) and 9.8 mg of ammonium bromide were added to a mixed organic solvent system of 200 μl of oleylamine and 20 ml of octadecene, and the system was heated to 120 °C under an argon atmosphere. And keep warm f...
Embodiment 2
[0046] Silver sulfide-iron carbide heteronanoparticles were synthesized by a simple seed growth method. 1 ml of silver sulfide quantum dots (10 mg / ml) and 36.5 mg of cetyltrimethylammonium bromide were added to a mixed organic solvent system of 200 μl of oleylamine and 20 ml of octadecene under an argon atmosphere. The system was heated to 120 degrees Celsius and held for 30 minutes. Subsequently, the temperature was continued to rise to 80 degrees Celsius, 0.4 ml of iron carbonyl was injected rapidly, and the temperature was maintained for 10 minutes. After 10 minutes, the reaction system continued to heat up, and when the temperature reached 300 degrees Celsius, the temperature was kept for 30 minutes. Then, after the system was cooled to room temperature, 60 ml of absolute ethanol was added, and centrifuged at 8000 rpm for 3 minutes to obtain monodispersed silver sulfide-iron carbide heterogeneous nanoparticles.
[0047] like Figure 10 As shown, transmission electron mi...
Embodiment 3
[0049] Silver sulfide-iron carbide heteronanoparticles were synthesized by a simple seed growth method. 1 ml of silver sulfide quantum dots (10 mg / ml) and 9.8 mg of ammonium bromide were added to a mixed organic solvent system of 200 μl of oleylamine and 20 ml of octadecene, and the system was heated to 120 °C under an argon atmosphere. And keep warm for 30 minutes. Subsequently, the temperature was continued to rise to 80 degrees Celsius, 1.412 g of iron acetylacetonate was injected rapidly, and the temperature was maintained for 10 minutes. After 10 minutes, the reaction system continued to heat up, and when the temperature reached 320 degrees Celsius, the temperature was kept for 30 minutes. Then, after the system was cooled to room temperature, 60 ml of absolute ethanol was added, and centrifuged at 8000 rpm for 3 minutes to obtain monodispersed silver sulfide-iron carbide heterogeneous nanoparticles.
[0050] like Figure 11 As shown, transmission electron microscopy i...
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