Preparation method for color-adjustable ternary AgInSe2 fluorescent quantum dots through aqueous-phase synthesis
The technology of fluorescent quantum dots and silver indium selenide is applied in the field of preparation of fluorescent quantum dots, which can solve the problems of reducing optical performance and restricting applications, and achieves the effects of good luminescence performance, adjustable emission wavelength and good dispersion.
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Embodiment 1
[0029] Under nitrogen protection, 0.0474g selenium powder and 0.0567g sodium borohydride (NaBH 4) was dissolved in 20mL high-purity water to prepare sodium hydride selenium (NaHSe) for subsequent use. 0.3396g mercaptopropionic acid (MPA) was dissolved in high-purity water, then the pH value of the above solution was adjusted to 12.0 with 3mol / L sodium hydroxide (NaOH) solution and the volume was fixed to 10mL. Dissolve 0.0340g of silver nitrate and 0.0584g of indium acetate (the molar ratio of silver to indium is 1:1) in 10mL of high-purity water, add the prepared MPA solution, and prepare a cationic solution for subsequent use (when silver nitrate, indium acetate and When preparing the solution with indium nitrate, cationic solutions with different molar ratios of silver and indium can be obtained). Put the above 20mL cation solution into a 100mL three-necked flask, pass nitrogen gas for 30 minutes, and then raise the temperature of the oil bath to 100°C to reflux. The NaHS...
Embodiment 2
[0032] Under nitrogen protection, 0.0474g selenium powder and 0.0567gNaBH 4 Dissolve in 20mL high-purity water to prepare NaHSe for later use. 0.3396g MPA was dissolved in high-purity water, then the pH value of the above solution was adjusted to 12.0 with 3mol / L NaOH solution and the volume was fixed to 10mL. 0.0679g of silver nitrate and 0.0584g of indium acetate (the molar ratio of silver to indium is 2:1) were dissolved in 10mL of high-purity water, and the MPA solution prepared in this example was added to prepare a cationic solution for later use. Put the above 20mL cation solution into a 100mL three-neck flask, pass nitrogen gas for 30 minutes, and then raise the temperature of the oil bath to 90°C to reflux. The NaHSe solution prepared in this example was quickly injected into the above solution and refluxed for 120 minutes. After the reaction, the solution was cooled to room temperature. Acetone was added to the obtained product until precipitation occurred, and th...
Embodiment 3
[0034] Under nitrogen protection, 0.0474g selenium powder and 0.0567gNaBH 4 Dissolve in 20mL high-purity water to prepare NaHSe for later use. 0.3396g MPA was dissolved in high-purity water, then the pH value of the above solution was adjusted to 10.0 with 3mol / L NaOH solution and the volume was fixed to 10mL. 0.0414g of silver nitrate and 0.0476g of indium nitrate (the molar ratio of silver to indium is 3:1) were dissolved in 10mL of high-purity water, and the MPA solution prepared in this example was added to prepare a cationic solution for later use. Put the above 20mL cation solution into a 100mL three-necked flask, pass nitrogen gas for 30 minutes, and then raise the temperature of the oil bath to 100°C to reflux. The NaHSe solution prepared in this example was quickly injected into the above solution and refluxed for 100 minutes. After the reaction, the solution was cooled to room temperature. Add acetone to the obtained product until precipitation occurs, and then ce...
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