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Ag2S/CdS core-shell structure nanometer tetrahedron and preparation method thereof

A technology of core-shell structure and tetrahedron, which is applied in the field of Ag2S/CdS core-shell structure nano-tetrahedron and its preparation, to achieve the effect of simplifying the operation steps and promoting the formation

Inactive Publication Date: 2008-12-10
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Nanospheres (Langmuir 2001, 17, 4779), nanowires (Adv. Funct. Mater. 2007, 17, 1501), nanoribbons (Chem. Mater. 2007, 19, 4663), and nanocrystals with polyhedral shapes such as prisms (Nano Lett.Vol.2, No.8, 2002), tetrahedron (Angew.Chem.Int.Ed 2007, 46, 8174) and hexagon (J.Phys.Chem.B 2006, 110, 9448), etc. Syntheses have been reported, but these structures are mostly formed by a single compound, composed of Ag 2 The synthesis of core-shell nanotetrahedra composed of both S and CdS has not been reported

Method used

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  • Ag2S/CdS core-shell structure nanometer tetrahedron and preparation method thereof

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Embodiment 1

[0014] (1) Mix 0.12M sulfur-containing organic phosphoric acid extractant Cyanex 301 with silver nitrate solution at a volume ratio of 1:3, the concentration of the silver nitrate solution is 0.1M, the acidity is 0.5M nitric acid, shake for 30min, and let stand 2 h, the organic phase was separated and bubbled with H 2 S gas, stirring at room temperature for 12 hours, centrifuging, taking black clear liquid to obtain silver sulfide organic nanofluid;

[0015] (2) Mix 0.12M sulfur-containing organic phosphoric acid extractant Cyanex 301 with 0.1M cadmium chloride solution at a volume ratio of 1:3, shake for 30min, let stand for 2 hours, separate the organic phase to obtain cadmium-containing ions The loaded organic phase;

[0016] (3) The prepared silver sulfide organic nanofluid and the loaded organic phase containing cadmium ions are mixed with a volume ratio of 2:3 and then packed into a reactor with a filling degree of 50%. After sealing, the reactor is heated at 160°C Aft...

Embodiment 2

[0018] (1) Mix 0.12M sulfur-containing organic phosphoric acid extraction agent Cyanex 301 with silver nitrate solution at a volume ratio of 2:3, the concentration of the silver nitrate solution is 01M, and the acidity is 0.5M nitric acid, shake for 30min, and stand for 2 hours, the organic phase was separated and H 2 S gas, stirring at room temperature for 12 hours, centrifuging, taking black clear liquid to obtain silver sulfide organic nanofluid;

[0019] (2) Mix 0.12M sulfur-containing organic phosphoric acid extractant Cyanex 301 with 0.1M cadmium chloride solution at a volume ratio of 2:3, shake for 30min, let stand for 2 hours, separate the organic phase to obtain cadmium-containing ions The loaded organic phase;

[0020] (3) After mixing the prepared silver sulfide organic nanofluid with the loaded organic phase containing cadmium ions at a volume ratio of 2:3, put it into a reactor, the filling degree is 40%, after sealing, the reactor is heated at 160°C After 24 ho...

Embodiment 3

[0022] (1) Mix 0.12M sulfur-containing organic phosphoric acid extraction agent Cyanex 301 with silver nitrate solution at a volume ratio of 1:1, the concentration of the silver nitrate solution is 0.1M, and the acidity is 0.5M nitric acid, shake for 30min, and stand for 2 hours, the organic phase was separated and H 2 S gas, stirred at room temperature for 24 hours, centrifuged, and took black clear liquid to obtain silver sulfide organic nanofluid;

[0023] (2) Mix 0.12M sulfur-containing organic phosphoric acid extractant Cyanex 301 with 0.1M cadmium chloride solution at a volume ratio of 1:1, shake for 30min, let stand for 2 hours, separate the organic phase, and obtain cadmium-containing ions The loaded organic phase;

[0024] (3) After mixing the prepared silver sulfide organic nanofluid with the loaded organic phase containing cadmium ions at a volume ratio of 2:3, put it into a reactor with a filling degree of 30%, after sealing it, heat the reactor at 160°C After 24...

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Abstract

The invention relates to a Ag2S / CdS core-shell structure nano-tetrahedron and a preparation method thereof. The method comprises the following steps of: obtaining a loaded organic phase containing silver ions or cadmium ions through solvent extraction, then passing through H2S gas into the loaded organic phase containing the silver ions to obtain Ag2S / CdS organic nano-fluid; packing a mixture of the Ag2S organic nano-fluid and the loaded organic phase containing the cadmium ions into a reaction kettle for sealing; and heating the reaction kettle at a temperature of between 130 and 160 DEG C for 12 to 24 hours to separate a product. The method combines the extraction and separation of Ag<+> and Cd<2+> and the preparation of a Ag2S / CdS core-shell structure together to realize the integration of solvent extraction and separation and nano-material preparation. A sulfur-containing extracting agent is used as the extracting agent during the whole process, and is also used as a sulfur source and a surface active agent, thereby facilitating the generation of a nano-sulfide; and silver-sulfide plays a templete role in the forming process of the Ag2S / CdS core-shell structure, thereby facilitating the formation of a tetrahedron structure.

Description

technical field [0001] The present invention relates to an Ag 2 S / CdS core-shell nano-tetrahedron and its preparation method. technical background [0002] As one of the most successful separation techniques, solvent extraction is widely used in the separation and purification of metal ions in hydrometallurgy. However, for the application of the purified metal, the usual practice is to use acid and alkali to back-extract it from the loaded organic phase to the aqueous phase to obtain a higher concentration of inorganic salt solution, and then add a precipitant to obtain the primary precipitation product. Then dissolve for further application. Wu Jinguang et al. discussed the extraction mechanism from the perspective of colloid and interface chemistry, and proposed that there are a variety of nano-scale molecular aggregates in the organic phase of extraction, which opened up a new way to study extraction theory at the molecular level and interface chemistry. On the basis o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/46C30B29/60C04B35/547C04B35/622
Inventor 廖伍平孙霞李艳玲
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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