Method for phased synthesis of SnS, SnS2 or SnS/SnS2 heterojunction nanocrystalline material by one-step process
A nanocrystalline material and heterojunction technology, which is applied in the directions of nanotechnology, nanotechnology, chemical instruments and methods, etc., to achieve the effect of simple operation process, low price and broad application prospects.
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Embodiment 1
[0019] (1) Synthesis of precursor: 10 mmol of SnCl 2 2H 2 O was dissolved in 10 mL of ethanol to make A solution. Dissolve 20mmol of sodium diethyldithiocarbamate in 10mL of ethanol to prepare solution B. Then all the prepared solution A was added dropwise to the solution B, and stirred for 1 hour. Suction filtration, washed three times with water, twice with ethanol, and dried in vacuum for later use.
[0020] (2) SnS, SnS 2 , SnS / SnS 2 Phase-controlled synthesis of heterojunction: Weigh 0.2025g of Sn organic precursor into a small sample tube, add 4ml of oleylamine, add 0μL of CS 2 solution. Transfer the mixture in the sample tube to a three-necked flask with 15ml of oleylamine, and slowly heat up to 120°C under the protection of nitrogen under magnetic stirring and keep it warm for half an hour to remove water and dissolved oxygen. Then continue to heat up to 280°C. After reacting for 30 min, it was naturally cooled to room temperature. The resulting precipitate wa...
Embodiment 2
[0022] (1) Synthesis of precursor: 10 mmol of SnCl 2 2H 2 O was dissolved in 10 mL of ethanol to make A solution. Dissolve 20mmol of sodium diethyldithiocarbamate in 10mL of ethanol to prepare solution B. Then all the prepared solution A was added dropwise to the solution B, and stirred for 2 hours. Suction filtration, washed three times with water, twice with ethanol, and dried in vacuum for later use.
[0023] (2) SnS, SnS 2 , SnS / SnS 2 Phase-controlled synthesis of heterojunction: Weigh 0.2025g of Sn organic precursor into a small sample tube, add 4ml of oleylamine, add 225μL of CS 2 solution. Transfer the mixture in the sample tube to a three-necked flask with 15ml of oleylamine, and slowly heat up to 120°C under the protection of nitrogen under magnetic stirring and keep it warm for half an hour to remove water and dissolved oxygen. Then continue to heat up to 300°C. After reacting for 20 min, it was naturally cooled to room temperature. Wash and separate the res...
Embodiment 3
[0025] (1) Synthesis of precursor: 10 mmol of SnCl 2 2H 2 O was dissolved in 10 mL of ethanol to make A solution. Dissolve 20mmol of sodium diethyldithiocarbamate in 10mL of ethanol to prepare solution B. Then all the prepared solution A was added dropwise to the solution B, and stirred for 3 hours. Suction filtration, washed three times with water, twice with ethanol, and dried in vacuum for later use.
[0026] (2) SnS, SnS 2 , SnS / SnS 2 Phase-controlled synthesis of heterojunction: Weigh 0.2025g of Sn organic precursor into a small sample tube, add 4ml of oleylamine, add 300μL of CS 2 solution. Transfer the mixture in the sample tube to a three-necked flask with 15ml of oleylamine, and slowly heat up to 120°C under the protection of nitrogen under magnetic stirring and keep it warm for half an hour to remove water and dissolved oxygen. Then continue to heat up to 320°C. After reacting for 10 min, it was naturally cooled to room temperature. Wash and separate the res...
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