Application of a nitrogen-doped graphene as a catalyst to remove SO2 by electro-oxidation
A nitrogen-doped graphene and electro-oxidation technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, and separation methods, can solve the problems of high cost, complicated preparation process, and poor catalytic activity of electro-oxidation catalysts, and achieve Excellent electrochemical catalytic activity, simple preparation process, and cheap raw materials
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Embodiment 1
[0044] Weigh 0.1 g of sucrose and 6 g of urea and dissolve in 7 g of deionized water, and stir until completely dissolved. Heat and dry at 60°C on a hot table to obtain a white solid, and continue heating at 60°C until the white solid is completely dry. Transfer the white solid to a quartz boat, put it in a tube furnace, heat it from room temperature to 1000°C at a heating rate of 4°C / min, bake it at 1000°C for 1h, and continuously pass it into Ar for protection. The Ar flow rate is 200sccm, and the final preparation The obtained nitrogen-doped graphene (NG-1000). from TEM figure 1It can be seen that the nitrogen-doped graphene NG-1000 is a thin layer structure, figure 2 At 2θ=25°, there are obvious graphite characteristic peaks, image 3 The EDS spectrum shows the presence of N element.
[0045] Weigh 2 mg of nitrogen-doped graphene NG-1000, 1 mL of isopropanol, and 50 μL of 5% Nafion solution in a 10 mL sample bottle, and disperse evenly by ultrasonication for 30 minute...
Embodiment 2
[0047] The experiment was carried out with the same method as in Example 1, except that the high-temperature calcination temperature was 800°C. From Figure 5 It can be seen that the prepared nitrogen-doped graphene NG-800 has a thin layer structure. Figure 6 It shows that there are obvious graphite characteristic peaks at 2θ=25°, Figure 7 shows the existence of C and N elements. use it as SO 2 When electrooxidizing the catalyst, from Figure 8 It can be seen from the cyclic voltammetry curve that the nitrogen-doped graphene NG-800 on SO 2 It has electro-oxidation catalytic activity, and the oxidation current peak appears around 1.2V (vs. SHE).
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