Process for preparing aqueous phase lead selenide nano material
A technology of nanomaterials and lead selenide, applied in chemical instruments and methods, binary selenium/tellurium compounds, lead compounds, etc., can solve problems such as unfavorable applications in biological fields, and achieve low raw material costs, mild reaction conditions, and short preparation cycles short effect
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Embodiment 1
[0010] Preparation of lead selenide nanocrystals coated with mercaptoacetic acid
[0011] First weigh 0.15g (0.4mmol) of lead acetate, dissolve it into 30mL of deionized water, add 27μL (0.4mmol) of mercaptoacetic acid, and then use 1M sodium hydroxide to adjust the pH value of the solution to 7 to prepare lead body solution. Dissolve 0.39g (3.2mmol) of selenourea in deionized water to make a selenium precursor solution. Then quickly pour the selenium precursor solution into the lead precursor solution, heat to 60°C, stop the reaction after 15 minutes of reaction, wash with water and isopropanol after the solution is cooled, centrifuge, and dry to obtain the aqueous phase selenium Lead oxide nanomaterials, the shape is nanoparticles, and the diameter is in the range of 15-25nm.
Embodiment 2
[0013] Preparation of lead selenide nanocrystals coated with mercaptopropionic acid
[0014] First weigh 0.30g (0.8mmol) of lead acetate, dissolve it in 40mL of deionized water, add 136μL (1.6mmol) of mercaptopropionic acid, and then use 1M sodium hydroxide to adjust the pH value of the solution to 10 to make lead precursor solution. Dissolve 0.39g (3.2mmol) of selenourea in deionized water to make a selenium precursor solution. Then quickly pour the selenium precursor solution into the lead precursor solution, heat to 120 ° C, stop the reaction after 30 minutes of reaction, after the solution is cooled, wash with water and isopropanol, centrifuge, and dry to obtain the obtained The water-phase lead selenide nanomaterial has a shape of nanoparticle and a diameter range of 20-30nm.
Embodiment 3
[0016] Preparation of cysteine-coated lead selenide nanocrystals
[0017] First weigh 0.15g (0.4mmol) of lead acetate, dissolve it in 30mL of water, add 0.07g (0.6mmol) of cysteine, and then use 1M sodium hydroxide to adjust the pH value of the solution to 9, before making lead body solution. Dissolve 0.39g (3.2mmol) of selenourea in deionized water to make a selenium precursor solution. Then quickly pour the selenium precursor solution into the lead precursor solution, heat to 180 ° C, stop the reaction after 45 minutes of reaction, after the solution is cooled, wash with water and isopropanol, centrifuge, and dry to obtain the obtained The water-phase lead selenide nanomaterial has a shape of a nanorod with a diameter in the range of 30-50nm and a length in the range of 80-500nm.
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