a kind of ag 2 hgs 2 Single crystal and its preparation method
A single crystal, silver source technology, applied in the direction of single crystal growth, crystal growth, single crystal growth, etc., can solve the problems of in-depth excavation restricting crystal properties, uneven powder morphology, affecting crystal properties, etc.
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[0028] The application also provides the above Ag 2 HgS 2 The preparation method of single crystal comprises the following steps:
[0029] Silver source, mercury source, sulfur source and water are mixed for hydrothermal reaction to obtain Ag 2 HgS 2 Single crystal; molar ratio of said silver source to said mercury source is 4:1.
[0030] Prepare Ag in the above 2 HgS 2 In the process of single crystal, the compound of silver and mercury is used as the source of silver and mercury, and the compound of sulfur is used as the source of sulfur; in the process of regulation, the molar ratio of silver ion and mercury ion is 4:1, and the silver ion and mercury ion are controlled The molar ratio of silver ions is about 1 times excessive, and the absolute excess of sulfur ions is guaranteed, that is, the molar number of sulfur ions in the sulfur source and the total molar number of silver ions in the silver source and mercury ions in the mercury source The ratio is > 30:5; with t...
Embodiment 1
[0037] Weigh 0.143g of silver chloride and 0.068g of mercuric chloride, and dissolve them in 20mL of ammonium sulfide solution with a mass fraction of 20%. After the reactants are evenly mixed, transfer the mixture to a 25mL reaction kettle, seal and heat to 200°C, react for 24 hours; after the reaction is completed, allow it to cool down to room temperature naturally, and black crystals with metallic luster are obtained;
[0038] The crystals of the above product were filtered, washed three times with deionized water, and dried in an oven at 70°C for 2 hours to obtain Ag 2 HgS 2 single crystal.
[0039] figure 1 It is the X-ray diffraction pattern of the crystal product prepared in this embodiment; From the X-ray diffraction pattern As can be seen in , all diffraction peak positions correspond well to the Ag 2 HgS 2 The corresponding diffractive crystal planes in the standard card (JCPDSCard No.84-0809). This indicates that the product is pure Ag 2 HgS 2 crystals wit...
Embodiment 2
[0044] Weigh 0.143g of silver chloride and 0.068g of mercuric chloride, and dissolve them in 20mL of ammonium sulfide solution with a mass fraction of 20%. After the reactants are evenly mixed, transfer the mixture to a 25mL reaction kettle, seal and heat To 200°C, react for 24 hours; after the reaction is over, control the cooling rate to cool slowly to room temperature over 7 days, and then obtain black crystals with metallic luster;
[0045] The crystals of the above product were filtered, washed three times with deionized water, and dried in an oven at 70°C for 2 hours to obtain Ag 2 HgS 2 Single crystal, ready to use.
[0046] Figure 5 It is a photo of the crystal product prepared in this embodiment. It can be seen from the figure that the obtained product is a black rod-shaped crystal with a metallic luster and an obvious increase in size.
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