NiO-based dilute magnetic semiconductor nanofiber and preparation method thereof
A dilute magnetic semiconductor and nanofiber technology, applied in the field of material science, can solve the problem of the lack of research reports on the one-dimensional structure of NiO dilute magnetic semiconductor
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Embodiment 1
[0041] Raw materials: analytically pure nickel acetate (Ni(Ac) 2 4H 2 O), ethanol, iron nitrate (Fe(NO 3 ) 3 9H 2 O), lithium nitrate (LiNO 3 ), polyvinylpyrrolidone (PVP) with a relative molecular mass of 1.3 million;
[0042] Prepare precursor solution: weigh 0.450g nickel acetate (Ni(Ac) 2 4H 2 O), 0.023g iron nitrate (Fe(NO 3 ) 3 9H 2 O), 0.002g lithium nitrate (LiNO 3 ). Nickel acetate (Ni(Ac) 2 4H 2 O), join in the ethanol, stir about half an hour to dissolve completely, the solution is light green. Then add iron nitrate (Fe(NO 3 ) 3 9H 2 O), lithium nitrate (LiNO 3 ), polyvinylpyrrolidone (PVP), and stirred for 10 hours to obtain a uniform and viscous precursor solution. The molar ratio of nickel, iron, and lithium in the precursor solution was 95:3:2.
[0043] Electrospinning: put the prepared precursor solution into a 10ml needle tube, use a No. 7 injection needle (needle tip ground flat), the spinning voltage is 13.5kV, and the receiving distance is...
Embodiment 2
[0046] Raw materials: analytically pure nickel acetate (Ni(Ac) 2 4H 2 O), ethanol, iron nitrate (Fe(NO 3 ) 3 9H 2 O), lithium nitrate (LiNO 3 ), polyvinylpyrrolidone (PVP) with a relative molecular mass of 1.3 million;
[0047] Prepare precursor solution: weigh 0.45g nickel acetate (Ni(Ac) 2 4H 2 O), 0.024g iron nitrate (Fe(NO 3 ) 3 9H 2 O), 0.05g lithium nitrate (LiNO 3 ). Nickel acetate (Ni(Ac) 2 4H 2 O), join in the ethanol, stir about half an hour to dissolve completely, the solution is light green. Then add iron nitrate (Fe(NO 3 ) 3 9H 2 O, lithium nitrate (LiNO 3 ), polyvinylpyrrolidone (PVP), and stirred for 10 hours to obtain a uniform and viscous precursor solution. The molar ratio of nickel, iron, and lithium in the precursor solution was 93:3:4.
[0048] Electrospinning: The method of this step is the same as that in Example 1.
[0049] Through the above method, NiO-based nanofibers can be obtained. The fiber can be expressed as Li 0.04 Ni 0.93...
Embodiment 3
[0051] Raw materials: analytically pure nickel acetate (Ni(Ac) 2 4H 2 O), ethanol, iron nitrate (Fe(NO 3 ) 3 9H 2 O), lithium nitrate (LiNO 3 ), polyvinylpyrrolidone (PVP) with a relative molecular mass of 1.3 million;
[0052] Prepare precursor solution: weigh 0.45g nickel acetate (Ni(Ac) 2 4H 2 O), 0.024g iron nitrate (Fe(NO 3 ) 3 9H 2 O), 0.008g lithium nitrate (LiNO 3 ). Nickel acetate (Ni(Ac) 2 4H 2 O), join in the ethanol, stir about half an hour to dissolve completely, the solution is light green. Then add iron nitrate (Fe(NO 3 ) 3 9H 2 O), lithium nitrate (LiNO 3), polyvinylpyrrolidone (PVP), and stirred for 10 hours to obtain a uniform and viscous precursor solution. The molar ratio of nickel, iron, and lithium in the precursor solution was 91:3:6.
[0053] Electrospinning: The method of this step is the same as that in Example 1.
[0054] Through the above method, NiO-based nanofibers can be obtained, which can be expressed as Li 0.06 Ni 0.91 Fe ...
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