Preparation method of metal phase molybdenum disulfide
A technology of molybdenum disulfide and metal phase, applied in the direction of molybdenum sulfide, etc., can solve problems such as danger and time-consuming
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Embodiment 1
[0019] A preparation method of metal phase molybdenum disulfide, the steps are as follows:
[0020] (1) Mix ammonium molybdate and thiourea at a molar ratio of 1:14, then stir in deionized water to form a homogeneous solution. Wherein, the concentration of ammonium molybdate is 1mmol / L;
[0021] (2) The solution was transferred to a stainless steel reaction kettle, reacted at 220°C for 18h, and then cooled naturally to room temperature.
[0022] (3) Centrifuge the reaction solution, wash the precipitate, and dry it in vacuum to obtain MoS 2 powder.
[0023] (4) The vacuum-dried MoS 2 The powder is dispersed into a saturated copper salt solution, MoS 2 The concentration is 1.14mmol / L; ultrasonic treatment 24h;
[0024] (5) Centrifuge the above solution, wash the precipitate, and dry it in vacuum to obtain metal phase molybdenum disulfide powder.
[0025] figure 1 is the scanning electron microscope image (SEM) of the prepared metal phase molybdenum disulfide. It can be s...
Embodiment 2
[0029] This embodiment is the same as embodiment 1, the MoS in step 4 2 The concentration is 0.11mmol / L, the Raman of the product is as follows Figure 6 shown. It can be seen from the figure that the samples prepared at this concentration have undergone a phase transition to form molybdenum disulfide in the metal phase.
Embodiment 3
[0031] This embodiment is the same as embodiment 1, the MoS in step 4 2 Concentration is 2.84mmol / L, the Raman of product is as follows Figure 7 shown. It can be seen from the figure that the samples prepared at this concentration are still in the semiconductor phase.
[0032] It can be seen from the above examples that when MoS 2 The concentration is 2.84mmol / L, and the molybdenum disulfide of the metal phase cannot be generated. The reason is that the concentration is too large, resulting in uneven dispersion between the nanoparticles, and the copper ions and MoS 2 The contact is hindered, the stress effect caused by copper ions becomes smaller, MoS 2 The slip of the middle S layer is hindered, so it does not produce a phase transition; when MoS 2 When the concentration is 0.11mmol / L, metal phase molybdenum disulfide can be generated, so when the concentration is lower than 1.14mmol / L, it can lead to the generation of metal phase molybdenum disulfide.
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