Method for synthesizing size-controllable silver sulfide quantum dots
A synthesis method, silver sulfide technology, applied in chemical instruments and methods, silver compounds, silver compounds, etc., can solve problems such as easy agglomeration, difficulty in controlling particle size, and rapid encounter reaction
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Embodiment 1
[0031] Embodiment 1——Synthesis of silver sulfide quantum dots with a particle size of 3nm
[0032] (1) Preparation of silver acetate source solution: 0.1669g silver acetate, first dissolved in oleylamine and then dissolved in 10mL isooctane to obtain a 0.1M silver acetate solution;
[0033] (2) Preparation of sulfur ion-containing inverse microemulsion: 0.2401g Na2S·9H2O was dissolved in 10mL secondary water to obtain a Na2S solution with a concentration of 0.1M. Add 10ml cyclohexane, 1mmol dioctyl sodium succinate sulfonate (concentration is 0.1mol / L) and 0.1mmol co-surfactant n-hexanol to a 25ml brown glass reagent bottle, and make it under magnetic stirring at room temperature Dissolve, add 45 μL of sodium sulfide solution, and 100 Hz ultrasonic for 30 minutes to obtain a reverse microemulsion containing sulfide ions;
[0034] (3) Synthesis of Ag2S quantum dots: Take 45 μL of silver acetate solution, add it to the inverse microemulsion, and ultrasonicate at room temperatur...
Embodiment 2
[0036] Embodiment 2——Synthesis of silver sulfide quantum dots with a particle size of 5nm
[0037] (1) Preparation of silver nitrate source solution: 0.1700g silver nitrate, first dissolved in oleylamine and then dissolved in 10mL isooctane to obtain a 0.1M silver acetate solution;
[0038] (2) Preparation of sulfur ion-containing inverse microemulsion: 0.076 g of thiourea was dissolved in 10 mL of secondary water to obtain a 0.1 M thiourea solution. Add 10ml isooctane, 1mmol dioctyl sodium succinate sulfonate (concentration is 0.1mol / L) and 0.1mmol co-surfactant n-hexanol to a 25ml brown glass reagent bottle, and make it under magnetic stirring at room temperature Dissolve, add 135 μL thiourea solution, and ultrasonicate at 70 Hz for 30 minutes to obtain a reverse microemulsion containing sulfur ions;
[0039](3) Synthesis of Ag2S quantum dots: Take 135 μL of silver nitrate solution and add it to the inverse microemulsion, drop 45 μL each time, once every 10 minutes, and ult...
Embodiment 3
[0041] Embodiment 3——the synthetic process of the silver sulfide quantum dot of 8nm grain size;
[0042] (1) Preparation of silver citrate source solution: 0.171g of silver citrate was first dissolved in oleylamine and then dissolved in 10mL of dodecane to obtain a 0.1M silver citrate solution;
[0043] (2) Preparation of inverse microemulsion containing sulfur ions: 0.075 g of thioacetamide was dissolved in 10 mL of secondary water to obtain a Na2S solution with a concentration of 0.1 M. Add 10ml of dodecane, 1mmol dioctyl sodium succinate sulfonate (concentration is 0.1mol / L) and 0.1mmol co-surfactant n-hexanol to a 25ml brown glass reagent bottle, and make it under magnetic stirring at room temperature Dissolve, add 270 μL of thioacetamide solution, and ultrasonicate at 100 Hz for 30 minutes to obtain a reverse microemulsion containing sulfur ions;
[0044] (3) Synthesis of Ag2S quantum dots: Take 270 μL of silver acetate solution and add it to the inverse microemulsion, d...
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