A preparation method of magnetic carbon nanocomposite fibers for rapid reduction of chromium-containing wastewater
A nano-composite fiber, nano-fiber technology, applied in the direction of reducing water/sewage treatment, chemical characteristics of fibers, chemical instruments and methods, etc., can solve problems such as carcinogenicity of chromium compounds
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Embodiment 1
[0016] Weigh 1.0 g of polyvinylpyrrolidone, dissolve it in a small beaker with 3.5 mL of absolute ethanol, and stir on a magnetic stirrer. According to the molar ratio of 2:1, weigh iron nitrate and nickel nitrate with a total mass fraction of 5%, ultrasonically dissolve them with 1.5mL of absolute ethanol, then add the salt solution dropwise to the absolute ethanol solution of polyvinylpyrrolidone, and continue stirring After 3 hours, inhale the solution with a syringe, place it on the propulsion pump and fix it, adjust the distance between the needle and the tinfoil receiving plate to 25cm, the propulsion speed of the propulsion pump is 0.1μL / min, and the high-voltage power supply voltage is 20kV. Polyvinylpyrrolidone nanofibers containing metal salts with a diameter ranging from 200nm to 500nm. After the prepared nanofibers were dried in an oven, they were calcined in a tube furnace, and the calcining temperature was adjusted to 800° C., and the calcining time was 60 min. ...
Embodiment 2
[0019] Weigh 1.0 g of polyvinylpyrrolidone, dissolve it in a small beaker with 3.5 mL of absolute ethanol, and stir on a magnetic stirrer. According to the molar ratio of 2:1, weigh iron nitrate and nickel nitrate with a total mass fraction of 5%, ultrasonically dissolve them with 1.5mL of absolute ethanol, then add the salt solution dropwise to the absolute ethanol solution of polyvinylpyrrolidone, and continue stirring After 3 hours, inhale the solution with a syringe, place it on the propulsion pump and fix it, adjust the distance between the needle and the tinfoil receiving plate to 25cm, the propulsion speed of the propulsion pump is 0.1μL / min, and the high-voltage power supply voltage is 20kV. Polyvinylpyrrolidone nanofibers containing metal salts with a diameter ranging from 200nm to 500nm. After the prepared nanofibers were dried in an oven, they were calcined in a tube furnace, and the calcining temperature was adjusted to 800° C., and the calcining time was 60 min. ...
Embodiment 3
[0022] Weigh 1.0 g of polyvinylpyrrolidone, dissolve it in a small beaker with 3.5 mL of absolute ethanol, and stir on a magnetic stirrer. According to the molar ratio of 2:1, weigh iron nitrate and nickel nitrate with a total mass fraction of 5%, ultrasonically dissolve them with 1.5mL of absolute ethanol, then add the salt solution dropwise to the absolute ethanol solution of polyvinylpyrrolidone, and continue stirring After 3 hours, inhale the solution with a syringe, place it on the propulsion pump and fix it, adjust the distance between the needle and the tinfoil receiving plate to 25cm, the propulsion speed of the propulsion pump is 0.1μL / min, and the high-voltage power supply voltage is 20kV. Polyvinylpyrrolidone nanofibers containing metal salts with a diameter ranging from 200nm to 500nm. After the prepared nanofibers were dried in an oven, they were calcined in a tube furnace, and the calcining temperature was adjusted to 800° C., and the calcining time was 60 min. ...
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