A high specific surface area α-mno 2 Nanorod and its preparation method and application
A technology with high specific surface area and specific surface area, applied in nanotechnology, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of limited specific surface area and low catalytic activity of catalysts, and achieve wide application value and application range. The effect of high catalytic activity and simple preparation process
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Embodiment 1
[0033] Embodiment 1 A kind of high specific surface area α-MnO 2 Nano stave
[0034] The high specific surface area α-MnO 2 The preparation method of nanorods comprises the following steps:
[0035] S1. Add 0.5g of precursor MgMnO 3 (The specific surface area is 34.3m 2 / g) immersed in 20mL of sulfuric acid solution with a concentration of 3.0mol / L, stirred and reacted at room temperature for 6h, and filtered to obtain a solid;
[0036] S2. Wash the solid obtained in step S1 with water until it becomes neutral, dry it in an oven at 80° C. to constant weight, and cool it to room temperature.
[0037] Precursor MgMnO 3 and the resulting α-MnO 2 SEM of nanorods figure 1 and figure 2 shown, α-MnO 2 Transmission electron microscopy of nanorods as image 3 shown; from figure 1 It can be seen that the precursor MgMnO 3 Also for porous materials, from figure 2 and image 3 It can be seen that the final product obtained is α-MnO 2 Nanorods have a diameter of about 20 n...
Embodiment 2
[0039] Embodiment 2 A kind of high specific surface area α-MnO 2 Nano stave
[0040] The high specific surface area α-MnO 2 The preparation method of nanorods comprises the following steps:
[0041] S1. Add 0.5g of the precursor CaMnO 3 (The specific surface area is 34.3m 2 / g) soaked in 2.5mL of sulfuric acid solution with a concentration of 6.0mol / L, stirred and reacted at room temperature for 4h, and filtered to obtain a solid;
[0042] S2. Wash the solid obtained in step S1 with water until it becomes neutral, dry it in an oven at 80° C. to constant weight, and cool it to room temperature.
[0043] It can be seen from the detection that the α-MnO prepared in this example 2 The nanorod has a specific surface area of 189.8m 2 / g.
Embodiment 3
[0044] Embodiment 3 A kind of high specific surface area α-MnO 2 Nano stave
[0045] The high specific surface area α-MnO 2 The preparation method of nanorods comprises the following steps:
[0046] S1. Put 0.5g of the precursor BaMnO 3 (The specific surface area is 34.3m 2 / g) immersed in 30 mL of sulfuric acid solution with a concentration of 2.0 mol / L, stirred and reacted at room temperature for 10 h, and filtered to obtain a solid;
[0047] S2. Wash the solid obtained in step S1 with water until it becomes neutral, dry it in an oven at 80° C. to constant weight, and cool it to room temperature.
[0048] It can be seen from the detection that the α-MnO prepared in this example 2 The nanorod has a specific surface area of 220.2m 2 / g.
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