Fluorescence ratio detection method for measuring moisture content of grease based on fluorescence perovskite nano material
A nanomaterial and detection method technology, applied in the field of spectral analysis, can solve the problems of large sampling volume, high detection limit, complex operation, etc., and achieve the effects of convenient detection, improved sensitivity and accuracy, and broad application prospects.
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Embodiment 1
[0031] 1, mesh silica coated CSPBBR 1.5 I 1.5 Quantum dots (CSPBBR 1.5 I 1.5 @MSNS):
[0032] 1 Preparation of Monoporous Silica (MSNS):
[0033] Weigh 0.86 g of tetraalkyltrylthane sulfonate (ctatos), 0.13 g of triethanolamine (TEAH 3And 40 ml of ultrapure water was stirred at 75 ° C for 50 min at 75 ° C. After the powder dissolved, 7.6 ml of tetraeth ester (TEOS) was added, and stirring was continued at 75 ° C for 1.8 h. After the reaction, the precipitate was washed three times with ultrapure water and ethanol, and calcined in a tube furnace at 540 ° C for 5.5 h, resulting in a mesh silica powder;
[0034] 2cspbbr 1.5 I 1.5 Preparation of @MSNS:
[0035] 3.0mg CSBR, 1.6mg PBI 2 18 mg of mesh silica (MSNS) was added 180 μl of dimethyl sulfoxide (DMSO), powder and reagent oscillation, was added to a vacuum oven reaction for a vacuum oven reaction of 145 ° C. After the solvent is dried, the powder in the reaction bottle is dried, and the CSPBBR emitted by orange. 1.5 I 1.5 @MSNS p...
Embodiment 2
[0041] 1, mesh silica coated CSPBBR 1.5 I 1.5 Quantum dots (CSPBBR 1.5 I 1.5 @MSNS):
[0042] 1 Preparation of Monoporous Silica (MSNS):
[0043] Weigh 0.96 g of tetraalkyltryltrylolosenzene sulfonate (CTATOS), 0.16 g of triethanolamine (TEAH 3 ) And 50 ml of ultrapure water in a tri-neck flask, stirred at 80 ° C for 60 min. After the powder dissolved, 7.8 ml of tetraeth (TEOS) was rapidly added, and stirring was continued at 80 ° C for 2.0 h. After the reaction, the precipitate was washed three times with ultrapure water and ethanol, and calcined at a tube furnace at 550 ° C for 6.0 hours to obtain a mesh silica powder;
[0044] 2cspbbr 1.5 I 1.5 Preparation of @MSNS:
[0045] 3.4mg CSBR, 1.8mg PBI 2 21 mg of mesoporous silica (MSNS) was added from 190 μL of dimethyl sulfoxide (DMSO), powder and reagent oscillation, and a vacuum oven reaction of 150 ° C. After the solvent is dried, the powder in the reaction bottle is dried, and the CSPBBR emitted by orange. 1.5 I 1.5 @MSNS powde...
Embodiment 3
[0051] 1, mesh silica coated CSPBBR1.5i 1.5 Quantum dots (CSPBBR 1.5 I 1.5 @MSNS):
[0052] 1 Preparation of Monoporous Silica (MSNS):
[0053] Weigh 1.06 g of ammonium hexamethyltrialyltrylolosenzene sulfonate (CTATOS), 0.19 g of triethanolamine (Teah 3 And 60 ml of ultrapure water was stirred at 85 ° C for 70 min at 85 ° C. After the powder dissolved, 8.0 ml of tetraeth ester (TEOS) was added, and stirred at 85 ° C for 2.2 h. After completion of the reaction, the precipitate was washed three times with ultrapure water and ethanol, and calcined at a tube furnace at 560 ° C for 6.5 h, resulting in a mesoporous silica powder;
[0054] 2cspbbr 1.5 I 1.5 Preparation of @MSNS:
[0055] 3.8mg CSBR, 2.0mg PBI 2 The 24 mg mesh silica (MSNS) was added 200 μl of dimethyl sulfoxide (DMSO), powder and reagent oscillatory, and a vacuum oven reaction for a vacuum oven at 155 ° C. After the solvent is dried, the powder in the reaction bottle is dried, and the CSPBBR emitted by orange. 1.5 I 1.5...
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