Method for directly preparing silicon shell type CdTe quantal-point
A technology of quantum dots and silicon shells, which is applied in the field of preparation of nanomaterials, can solve the problems of limited development and application research, complex preparation methods, and reduced yields, and achieve improved photobleaching resistance, simple experimental equipment, and easy operation. Effect
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Embodiment 1
[0022] Preparation of silicon-shell CdTe quantum dots:
[0023] Weigh Cd(ClO 4 ) 2 ·6H 2 O 100mg was placed in a three-necked flask, 100mL of methanol was added, and then high-purity nitrogen gas was introduced to remove the oxygen in the solution. Add 0.715 mL of MPS to the solution, and pass through freshly prepared H under stirring 2 Te gas (by 13.9mg of Al 2 Te 3 With 0.5mol / L of H 2 SO 4 reaction), then stop the aeration, heat and reflux at 65°C for 10 minutes, adjust the pH value of the reaction solution to 8.0 with tetramethylammonium hydroxide and continue to reflux for 40 minutes, thereby directly preparing a quantum dot fluorescence surface coated with a silicon shell nanoparticles.
Embodiment 2
[0025] Preparation of silicon-shell CdTe quantum dots:
[0026] Weigh Cd(AC) 2 2H 2 O 63.5 mg was placed in a three-necked flask, 100 mL of tetrahydrofuran was added, and then high-purity nitrogen gas was introduced to remove oxygen in the solution. Add 1 mL of MPS to the solution and pass through freshly prepared H under stirring 2 Te gas (by 15mg Al 2 Te 3 With 0.5mol / L of H 2 SO 4 reaction), then stop the aeration, heat and reflux at 70°C for 10 minutes, adjust the pH value of the reaction solution to 8.5 with tetramethylammonium hydroxide and continue to reflux for 30 minutes, thereby directly preparing a quantum dot fluorescence surface coated with a silicon shell nanoparticles.
Embodiment 3
[0028] Preparation of silicon-shell CdTe quantum dots:
[0029] Weigh Cd(ClO 4 ) 2 ·6H 2 O 41.9mg was placed in a three-necked flask, 100mL of methanol was added, and then high-purity nitrogen gas was introduced to remove the oxygen in the solution. Add 0.625 mL of MPS to the solution, and pass through freshly prepared H under stirring 2 Te gas (by 4.25mg Al 2 Te 3 With 0.5mol / L of H 2 SO 4 reaction), then stop the aeration, heat and reflux at 65°C for 12 minutes, adjust the pH value of the reaction solution to 8.0 with tetramethylammonium hydroxide and continue to reflux for 40 minutes, thereby directly preparing the quantum dot fluorescence surface coated with a silicon shell nanoparticles.
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