Graphite with surface modified by azido groups and preparation method thereof
A surface modification and azide-based technology, applied in the field of material chemistry, can solve the problems of poor selectivity and expensive iodine monochloride reagent, and achieve the effects of low cost, high selectivity and simple preparation method
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Embodiment 1
[0025] A method for preparing a surface-modified azide-based graphite, the method comprising the following steps:
[0026] Step 1. In a 1mol / L sodium azide solution, use a three-electrode system, with graphite sheet as anode, platinum sheet electrode as cathode, and saturated calomel electrode as reference electrode, and use an electrochemical workstation to test the graphite sheet. The electrode was treated with 20mA constant current for 30min;
[0027] Step 2: Soak the graphite sheet electrode treated in Step 1 in methanol and then dry it at room temperature (25° C.) to obtain surface-modified azide-based graphite.
[0028] figure 1 with figure 2 Respectively, the X-photoelectron energy spectrum full image scan and the fine scan of N1s of the surface-modified azide-based graphite sheet prepared by the method of Example 1; it can be seen from the figure that the azide group center nitrogen atom can be seen from the figure The signal of about 404eV and the signal of the ot...
Embodiment 2
[0032] The preparation method of this embodiment is as follows:
[0033] Step 1. In a 2mol / L potassium azide solution, use a three-electrode system, with graphite sheets as anodes, platinum sheets as cathodes, and saturated calomel electrodes as reference electrodes, and use an electrochemical workstation to test the graphite sheets. Apply 0.6V constant potential to the electrode for 60min;
[0034] Step 2: Soak the graphite sheet electrode treated in Step 1 in methanol and then dry it at room temperature to obtain surface-modified azide-based graphite.
[0035] For the surface-modified azide-based graphite sheet prepared in this example, XPS characterization shows that the relative content of N elements on the surface is 1.2%.
Embodiment 3
[0037] The preparation method of this embodiment is as follows:
[0038] Step 1. In a 1.5mol / L lithium azide solution, use a three-electrode system, with graphite sheet as anode, platinum sheet electrode as cathode, and saturated calomel electrode as reference electrode, and use an electrochemical workstation to test graphite Apply a 10mA constant current to the sheet electrode for 60min;
[0039] Step 2: Soak the graphite sheet electrode treated in Step 1 in methanol and then dry it at room temperature to obtain surface-modified azide-based graphite.
[0040] XPS characterization of the surface-modified azide-based graphite sheet prepared in this example shows that the relative content of N elements on the surface is 1.5%.
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