Method for preparing Fe-doped Mn3O4 carbon-nitrogen material with hollow nano-frame structure and application thereof
A frame structure, carbon-nitrogen material technology, applied in the direction of structural parts, electrical components, battery electrodes, etc., can solve the problems of time-consuming, cumbersome preparation process, and low output, and achieve difficult agglomeration, high oxygen reduction activity, and good morphology regular effect
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Embodiment 1
[0041] A Fe-doped Mn with hollow nanoframe structure 3 o 4 The preparation method of carbon nitrogen material, comprises the following steps:
[0042] 1)KMnFe(CN) 6 Preparation of khaki precipitate: weigh 3.0g of PVP, 1.0mmol of K 3 Fe(CN) 6 ·3H 2 O solid metal salt and 50ml H 2 The O solution was mixed and mechanically stirred for 10 min at room temperature to obtain Fe(CN) 6 3- / PVP solution; Weigh 1.5mmol of MnCl 2 with 50ml H 2 The O solution was mixed and mechanically stirred for 10 min at room temperature to obtain Mn 2+ solution; the Fe(CN) 6 3- / PVP solution and Mn 2+ The solutions were mixed and allowed to stand for 12 hours to obtain KMnFe(CN) 6 Earthy yellow precipitate;
[0043] 2) Preparation of Fe-doped Mn with hollow nanoframe structure 3 o 4 Carbon nitrogen material: the KMnFe(CN) prepared in step 1) 6 The khaki precipitate was washed with alkali in 0.2 M NaOH solution at 40 ° C for 4 h, and the obtained solid powder material was first washed a...
Embodiment 2
[0046] A Fe-doped Mn with hollow nanoframe structure 3 o 4 The preparation method of carbon nitrogen material, comprises the following steps:
[0047] 1)KMnFe(CN) 6 Preparation of khaki precipitate: weigh 3.5g of PVP, 1.0mmol of K 3 Fe(CN) 6 ·3H 2 O solid metal salt and 50ml H 2 The O solution was mixed and mechanically stirred for 10 min at room temperature to obtain Fe(CN) 6 3- / PVP solution; Weigh 1.5mmol of MnCl 2 with 50ml H 2 The O solution was mixed and mechanically stirred for 10 min at room temperature to obtain Mn 2+ solution; the Fe(CN) 6 3- / PVP solution and Mn 2+ The solutions were mixed and allowed to stand for 12 hours to obtain KMnFe(CN) 6 Earthy yellow precipitate;
[0048] 2) Preparation of Fe-doped Mn with hollow nanoframe structure 3 o 4 Carbon nitrogen material: the KMnFe(CN) prepared in step 1) 6 The khaki precipitate was washed with alkali in 0.2 M NaOH solution at 40 ° C for 4 h, and the obtained solid powder material was first washed a...
Embodiment 3
[0050] A Fe-doped Mn with hollow nanoframe structure 3 o 4 The preparation method of carbon nitrogen material, comprises the following steps:
[0051] 1)KMnFe(CN) 6 Preparation of khaki precipitate: weigh 4.0g of PVP, 1.0mmol of K 3 Fe(CN) 6 ·3H 2 O solid metal salt and 50ml H 2 The O solution was mixed and mechanically stirred for 10 min at room temperature to obtain Fe(CN) 6 3- / PVP solution; Weigh 1.5mmol of MnCl 2 with 50ml H 2 The O solution was mixed and mechanically stirred for 10 min at room temperature to obtain Mn 2+ solution; the Fe(CN) 6 3- / PVP solution and Mn 2+ The solutions were mixed and allowed to stand for 12 hours to obtain KMnFe(CN) 6 Earthy yellow precipitate;
[0052] 2) Preparation of Fe-doped Mn with hollow nanoframe structure 3 o 4 Carbon nitrogen material: the KMnFe(CN) prepared in step 1) 6 The khaki precipitate was washed with alkali in 0.2 M NaOH solution at 40 ° C for 4 h, and the obtained solid powder material was first washed a...
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