a chiral mos 2 Nanosheet and its preparation method
A nanosheet and chiral technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of high cost and uneconomical applicability of nanosheets, and achieve cheap and easy-to-obtain raw materials , the effect of structural stability
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[0030] The invention protects a kind of chiral MoS 2 A method for preparing nanosheets, comprising the steps of:
[0031] (1) Disperse the chiral amino acid in water, the concentration of the chiral amino acid solution is 0.5-1 mg / mL.
[0032] (2) MoO 3 The powder is dispersed in water with a concentration of 0.2-0.4mol / L.
[0033] (3) Na 2 S powder is dispersed in water with a concentration of 0.5-1mol / L.
[0034] (4) A certain volume of MoO 3 solution and a certain volume of Na 2 Add the S solution into the chiral amino acid solution, and stir to mix evenly.
[0035] (5) Add HCl to adjust the pH value to 6.0-6.5. When the solution turns into a light yellow transparent liquid, chiral MoS is prepared 2 Nanosheets.
Embodiment 1
[0037] Weigh 5.76g MoO 3 , put it into a 250mL glass beaker, add 100mL deionized water, add 4mol / L NaOH, adjust the pH value to 11, fill up the deionized water to 200mL, and then get 0.2mol / L MoO 3 solution. Weigh 388mg Na 2 S, add 9mL deionized water to get 0.5mol / L Na 2 S solution. Weigh 200mg of L-cysine, put it into a 500mL glass beaker, add 387mL of deionized water, and dissolve it completely under magnetic stirring. Add 10 mL of 0.2 mol / L MoO to the L-cysine solution 3 solution, 2mL 0.5mol / L Na 2 S solution, and then add 1mL of 1mol / L HCl solution, so that the pH value is between 6.0-6.5. That is, the L-type MoS is obtained 2 Nanosheets.
[0038] Depend on figure 1 A shows that the solution dispersibility that embodiment 1 makes is good. Depend on figure 2 The TEM figure of A shows that the MoS obtained in Example 1 2 The lateral dimensions of the nanosheets are about 100 nm, and the image 3 The AFM map of A confirms the resulting MoS 2 Nanosheet thicknes...
Embodiment 2
[0040] Weigh 5.76g MoO 3 , put it into a 250mL glass beaker, add 100mL deionized water, add 4mol / L NaOH, adjust the pH value to 11, fill up the deionized water to 200mL, and then get 0.2mol / L MoO 3 solution. Weigh 388mg Na 2 S, add 9mL deionized water to get 0.5mol / L Na 2 S solution. Weigh 200mg of D-cysine, put it into a 500mL glass beaker, add 387mL of deionized water, and dissolve it completely under magnetic stirring. Add 10 mL of 0.2 mol / L MoO to the D-cysine solution 3 solution, 2mL 0.5mol / L Na 2S solution, and then add 1mL of 1mol / L HCl solution, so that the pH value is between 6.0-6.5. D-type MoS 2 Nanosheets.
[0041] Depend on figure 1 B shows that the solution dispersibility that embodiment 2 makes is good. Depend on figure 2 From the TEM image of B, it can be seen that the MoS obtained in Example 1 2 The lateral dimensions of the nanosheets are about 10 nm, and the image 3 The AFM map of B confirms the resulting MoS 2 The thickness of the nanosheet ...
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