Copper system metal organic framework compound for selectively adsorbing heavy metal ions and preparation method thereof

A metal organic framework, heavy metal ion technology, applied in the directions of alkali metal compounds, alkali metal oxides/hydroxides, chemical instruments and methods, etc., can solve the problem of less research on adsorption performance

Active Publication Date: 2013-06-19
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, at the current research stage, improving the stability of metal organic framework compounds has become one of the hot spots of research. Metal organic framework compounds have a large specific surface area. Patents CN102614737A, CN103008012A, and CN102886244A have already had relatively in-depth research on synthesis and application. , but generally speaking, there is still less research on the adsorption performance of aqueous solution environment

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  • Copper system metal organic framework compound for selectively adsorbing heavy metal ions and preparation method thereof
  • Copper system metal organic framework compound for selectively adsorbing heavy metal ions and preparation method thereof
  • Copper system metal organic framework compound for selectively adsorbing heavy metal ions and preparation method thereof

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Embodiment 1

[0019] First weigh 0.8842g (3.66mmol) copper nitrate hexahydrate at room temperature, 0.8780g H 3 PW 12 o 40 (Cu / W=1) was dissolved in 12mL of deionized water, stirred at 1500r / min for 5min to obtain solution 1; at room temperature, weighed 0.4203g (2.00mmol) organic ligand trimesic acid and dissolved it in 12mL of absolute ethanol , stirred under 1500r / min rotating speed for 30min to obtain solution two; under room temperature, solution one and solution two were mixed evenly, and the mixed solution was poured into a quartz microwave reaction tube with a capacity of 35mL, and a microwave synthesizer (Discover series, U.S. CEM company , microwave maximum power 300W) Reaction parameters: reaction temperature 120°C, reaction time 20min, maximum withstand pressure 150psi, blue turbid liquid is obtained after microwave reaction; filter the blue turbid liquid at room temperature, and then use deionized water Wash with absolute ethanol five times to remove unreacted ligands and gue...

Embodiment 2

[0021] First weigh 0.8842g (3.66mmol) copper nitrate hexahydrate at room temperature, 0.8780g H 3 PW 12 o 40 (Cu / W=1) was dissolved in 12mL of deionized water, stirred at 1500r / min for 5min to obtain solution 1; at room temperature, weighed 0.4203g (2.00mmol) organic ligand trimesic acid and dissolved it in 12mL of absolute ethanol , stirred under 1500r / min rotating speed for 30min to obtain solution two; under room temperature, solution one and solution two were mixed evenly, and the mixed solution was poured into a quartz microwave reaction tube with a capacity of 35mL, and a microwave synthesizer (Discover series, U.S. CEM company , microwave maximum power 300W) Reaction parameters: reaction temperature 120°C, reaction time 20min, maximum withstand pressure 150psi, blue turbid liquid is obtained after microwave reaction; filter the blue turbid liquid at room temperature, and then use deionized water Wash with absolute ethanol five times to remove unreacted ligands and gue...

Embodiment 3

[0023] First weigh 0.8842g (3.66mmol) copper nitrate hexahydrate at room temperature, 0.8780g H 3 PW 12 o 40 (Cu / W=1) was dissolved in 12mL of deionized water, stirred at 1500r / min for 5min to obtain solution 1; at room temperature, weighed 0.4203g (2.00mmol) organic ligand trimesic acid and dissolved it in 12mL of absolute ethanol , stirred under 1500r / min rotating speed for 30min to obtain solution two; under room temperature, solution one and solution two were mixed evenly, and the mixed solution was poured into a quartz microwave reaction tube with a capacity of 35mL, and a microwave synthesizer (Discover series, U.S. CEM company , microwave maximum power 300W) Reaction parameters: reaction temperature 120°C, reaction time 20min, maximum withstand pressure 150psi, blue turbid liquid is obtained after microwave reaction; filter the blue turbid liquid at room temperature, and then use deionized water Wash with absolute ethanol five times to remove unreacted ligands and gue...

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Abstract

The invention relates to a method for rapidly preparing a metal organic framework compound and an application for adsorbing heavy metal ions in an aqueous solution thereof. The preparation method is simple, the preparation process is rapid, the yield is high, and the metal organic framework compound which stably exists under the air atmosphere and in the aqueous solution is prepared by using polyoxometallate hybridization, guest molecules such as H2O, C2H5OH and polyoxometallate are filled in a framework pore channel, the functions of supporting and stabilizing a framework are realized to a certain degree, the influence of different copper and tungsten ratios to the structural stability of the copper system metal organic framework compound is considered, the copper system metal organic framework compound serves as a physical adsorbent to be applied to the adsorption of heavy metal ions in the aqueous solution, the compound has obvious selectivity on Pb<2+>, and the repetitive experiments prove that the adsorbent can be repeatedly used for over two times.

Description

technical field [0001] The invention provides a copper-based metal-organic framework compound for selectively adsorbing heavy metal ions in an aqueous solution and a preparation method thereof. The metal-organic framework compound uses inorganic metal copper salt to provide a metal source and organic ligand trimesic acid to react rapidly under microwave conditions, thereby forming a compound with a specific surface area of ​​1000-2000m 2 The three-dimensional space framework compound between / g, and then through the hybridization of polyoxometalates, the metal-organic framework compound that exists stably in the air atmosphere and in the aqueous solution is prepared, and the guest molecules H are filled in the framework pores 2 O, C 2 h 5 OH and polyoxometalates play a role in supporting and stabilizing the skeleton to a certain extent. The hybridized copper-based metal-organic framework compound exhibits obvious activity and selectivity in the adsorption performance of hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F1/62
Inventor 李伟邹芳
Owner NANKAI UNIV
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