Ge-Sb micropore sulfide with ion exchange performance, preparation method and usage thereof

A technology of ion exchange and sulfide, applied in cation exchange materials, ion exchange water/sewage treatment, radioactive purification, etc., can solve the problems of limited reports

Inactive Publication Date: 2010-03-24
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, compared with other ion exchangers such as zeolites, reports on metal chalcogenides with good ion exchange capacity and high selectivity for cesium are still limited.
In particular, the research on the ion exchange properties of metal chalcogenides constructed by the asymmetric coordination polyhedron of group 14 metal chalcogen tetrahedron and group 15 metal chalcogen has not been reported yet.

Method used

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  • Ge-Sb micropore sulfide with ion exchange performance, preparation method and usage thereof
  • Ge-Sb micropore sulfide with ion exchange performance, preparation method and usage thereof
  • Ge-Sb micropore sulfide with ion exchange performance, preparation method and usage thereof

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Embodiment 1

[0017] Embodiment 1: germanium-antimony microporous sulfide [(Me) 2 NH 2 ] 2 Sb 2 GeS 6 preparation of

[0018] GeO 2 (1.0mmol, 0.106g), Sb (1.0mmol, 0.123g), S (8.5mmol, 0.274g) were added to 4mL of N,N'-dimethylformamide solvent, stirred thoroughly at room temperature and sealed into a 20mL liner In a polytetrafluoroethylene stainless steel reactor, react at a constant temperature of 160°C for 7 days, then cool down to room temperature naturally, filter and wash thoroughly with distilled water and ethanol to obtain yellow prismatic crystals (the target product) and some unknown yellowish yellow powder, The yield of crystalline product can reach 17%.

Embodiment 2

[0019] Embodiment 2: germanium-antimony microporous sulfide [(Me) 2 NH 2 ] 2 Sb 2 GeS 6 Ion exchange experiments on alkali metals

[0020] A typical ion exchange experiment: the alkali metal chloride ACl (A=Na, K, Rb, Cs) (2mmol) was dissolved in 20mL of distilled water, and then 0.02mmol [(Me) 2 NH 2 ] 2 Sb 2 GeS 6 For crystal samples, the mixture was stirred at room temperature for 24 hours, and then the ion-exchanged product was filtered and washed thoroughly with distilled water, ethanol and acetone in sequence to obtain an alkali metal ion-exchanged product.

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Abstract

The invention relates to a Ge-Sb micropore sulfide with the ion exchange performance, a preparation method and the usage thereof. The sulfide has the chemical formula of (Me2 NH2)2 Sb2 GeS6 and the molecular weight of 600.64, belonging to tetragonal crystal system; and the space group is P4<1> 2<1>2, and the unit cell parameters comprise: a= b= 10.988 (3), c=13.811 (5)*, alpha=90 degrees, beta=90degrees, gamma=90 degrees, V=1667.6 (9) *<3>, and z=4. The material is synthesized by a solvent thermal method. The Ge-Sb micropore sulfide has excellent ion exchange performance for ions such as Cs<+>, Rb<+>, K<+> and Na<+> in water solution, and has strong ion exchange capability and high selectivity especially for the Cs<+>. The invention has important significance for removing radioactive elements in nuclear waste liquid and develops a new ion exchanger for treating the nuclear waste liquid.

Description

technical field [0001] The invention relates to a germanium-antimony microporous sulfide synthesized under solvothermal conditions and using protonated dimethylamine as a template. + , Rb + 、K + 、Na + Ions have good ion exchange properties, especially for Cs + Ions have strong ion exchange capacity and high selectivity. It is of great significance to remove radioactive cesium in nuclear waste liquid, and a new ion exchanger for nuclear waste liquid treatment has been developed. Background technique [0002] Porous materials are widely used in catalysis, adsorption, separation, ion exchange, sensing, etc. Its preparation and properties have been a hot research topic at home and abroad. From early silica-alumina zeolite and aluminum phosphate, to zeolite-like materials based on other oxo acid salts, and even microporous metal-organic coordination polymers, porous materials not only have great development in composition and structure, but also in function and application....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J39/08G21F9/12C02F1/42C22B26/10B01J39/09
Inventor 冯美玲黄小荥
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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