Method for purifying nano-diamond
A nano-diamond and purification method technology, which is applied in the field of nano-diamond purification, can solve the problems of complicated nano-diamond removal routes and low removal efficiency, and achieve the effects of avoiding metal ion precipitation, improving removal efficiency, and saving consumption
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Embodiment 1
[0035] A method for purifying nano-diamonds, comprising the following steps:
[0036] (1) Adding the nano-diamond black powder to a mass concentration of 96% H 2 SO 4 solution and a mass concentration of 90% H 3 PO 4 solution mixture, heated and stirred for 30min, then added KMnO 4, the temperature of the control system is 75°C, and the reaction is 3h, wherein, nano-diamond black powder, mixed solution, KMnO 4 The mass ratio is 1:4:0.6, H 2 SO 4 solution and H 3 PO 4 The volume ratio of the solution is 1:1;
[0037] (2) the solution after step (1) reaction is cooled to room temperature, then adopts ceramic membrane filter to filter, wash with water, obtain the nano-diamond after rough extraction;
[0038] (3) Adding the nano-diamond after rough extraction in step (2) into a NaOH solution with a concentration of 0.6mol / L and stirring for 3h;
[0039] (4) The solution after the reaction in step (3) is filtered by a ceramic membrane filter, washed with water, and dried ...
Embodiment 2
[0043] A method for purifying nano-diamonds, comprising the following steps:
[0044] (1) Adding the nano-diamond black powder to a mass concentration of 90% H 2 SO 4 solution and a mass concentration of 85% H 3 PO 4 solution mixture, heated and stirred for 45min, then added KMnO 4 , the temperature of the control system is 85°C, and the reaction is 2.5h, wherein, nano-diamond black powder, mixed solution, KMnO 4 The mass ratio is 1:6:0.8, H 2 SO 4 solution and H 3 PO 4 The volume ratio of the solution is 2:1;
[0045] (2) the solution after step (1) reaction is cooled to room temperature, then adopts ceramic membrane filter to filter, wash with water, obtain the nano-diamond after rough extraction;
[0046] (3) Adding the nano-diamond after rough extraction in step (2) into a KOH solution with a concentration of 1mol / L and stirring for 2.5h;
[0047] (4) The solution after the reaction in step (3) is filtered by a ceramic membrane filter, washed with water, and drie...
Embodiment 3
[0051] A method for purifying nano-diamonds, comprising the following steps:
[0052] (1) Adding the nano-diamond black powder to a mass concentration of 82% H 2 SO 4 solution and a mass concentration of 81% H 3 PO 4 solution mixture, heated and stirred for 60min, then added KMnO 4 , the temperature of the control system is 100°C, and the reaction is 2h, wherein, nano-diamond black powder, mixed solution, KMnO 4 The mass ratio is 1:9:1, H 2 SO 4 solution and H 3 PO 4 The volume ratio of the solution is 3:1;
[0053] (2) the solution after step (1) reaction is cooled to room temperature, then adopts ceramic membrane filter to filter, wash with water, obtain the nano-diamond after rough extraction;
[0054] (3) Adding the nano-diamond after rough extraction in step (2) into a NaOH solution with a concentration of 2mol / L and stirring for 1h;
[0055] (4) The solution after the reaction in step (3) is filtered by a ceramic membrane filter, washed with water, and dried at...
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