A kind of magnetic nano Tenn's blue and its preparation method and application
A magnetic nanometer and Teng's blue technology, which is applied to magnetic liquids, material analysis through electromagnetic means, and measurement devices, can solve problems such as prone to side reactions, reduced lifespan, and high cost, and achieve excellent electrochemical activity and preparation. The method is simple and the effect of good application prospect
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Embodiment 1
[0041]Take 10 mL of double-distilled water, add enough potassium hexacyanoferrate, and disperse by ultrasonic for 2 minutes to obtain a saturated potassium hexacyanoferrate solution.
[0042] Take 30mL acetone in a 250mL round bottom flask, add 4mL [bmim]FeCl 4 , under magnetic stirring, add potassium hexacyanoferrate saturated solution drop by drop until the solution turns dark green, continue to stir for 2 hours, let it stand for 28 hours, separate the clear liquid, transfer the lower layer mixture into a centrifuge tube and centrifuge at 8000r / min for 10 minutes , decant the upper liquid, and ultrasonically wash the synthetic substance with acetone and secondary water, respectively, until the supernatant is colorless. Dry at room temperature (25°C) for 12 hours, transfer to a test tube for 4 hours at 130°C in vacuum, take it out and store it in a desiccator sealed.
[0043] A glassy carbon electrode with a diameter of 2mm was covered with Al 2 o 3 After polishing, they w...
Embodiment 2
[0045] Take 15 mL of twice distilled water, add enough potassium hexacyanoferrate, and disperse by ultrasonic for 4 minutes to obtain a saturated potassium hexacyanoferrate solution.
[0046] Take 20mL acetone in a 250mL round bottom flask, add 3mL [bmim]FeCl 4 , under magnetic stirring, add potassium hexacyanoferrate saturated solution drop by drop until the solution turns dark green, continue to stir for 2 hours, let it stand for 24 hours, separate the clear liquid, transfer the lower layer mixture to a centrifuge tube, centrifuge at 6000r / min for 15 minutes, pour The upper layer liquid was taken out, and the synthetic substance was ultrasonically washed with acetone and secondary water, respectively, until the supernatant was colorless. Dry at room temperature (20°C) for 24 hours, transfer to a test tube and vacuum dry at 120°C for 5 hours, take it out and store it in a desiccator sealed.
[0047] A glassy carbon electrode with a diameter of 3mm was covered with Al 2 o 3...
Embodiment 3
[0049] Take 20 mL of double-distilled water, add enough potassium hexacyanoferrate, and disperse ultrasonically for 5 minutes to obtain a saturated potassium hexacyanoferrate solution.
[0050] Take 40mL acetone in a 500mL round bottom flask, add 5mL [bmim]FeCl 4 , under magnetic stirring, add potassium hexacyanoferrate saturated solution drop by drop until the solution turns dark green, continue stirring for 3 hours, let it stand for 36 hours, separate the clear liquid, transfer the lower layer mixture into a centrifuge tube, centrifuge at 10000r / min for 8 minutes, pour The upper layer liquid was taken out, and the synthetic substance was ultrasonically washed with acetone and secondary water, respectively, until the supernatant was colorless. Dry at room temperature (23°C) for 14 hours, transfer to a test tube and vacuum dry at 140°C for 3.5 hours, take it out and store it in a desiccator sealed.
[0051] A glassy carbon electrode with a diameter of 4mm was covered with Al ...
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