UiO-66-NH2 composite material used for palladium adsorption and preparation method thereof

A technology of uio-66-nh2 and composite materials, which is applied in chemical instruments and methods, and other chemical processes, to achieve the effect of improving fluid mechanical properties and saving production costs

Inactive Publication Date: 2019-11-01
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, UiO-66-NH 2 It is mainly used as an adsorbent for dye wastewater, and its application in other fields is rarely reported. CN 108654402A discloses a UiO-66-NH 2 Composite material and its preparation method and application in seawater desalination, said composite material is made of carrier modified by 3-aminopropyltriethoxysilane (APTES) and UiO-66-NH 2 Membrane composition, which is mainly used in the field of seawater desalination treatment

Method used

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  • UiO-66-NH2 composite material used for palladium adsorption and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 6.9g of zirconium nitrate (pentahydrate) and 4.2g of 2-aminoterephthalic acid to a round bottom flask, then add a mixed solvent of 120mL of water and 30mL of acetic acid, ultrasonically disperse for 5 minutes, then stir and reflux at 110°C for 2 hours , cool to room temperature, add 36mL of sodium alginate aqueous solution with a mass concentration of 0.5% to the mixed solution, mix well, add hydrochloric acid dropwise to adjust the pH value to below 1, and soak the precipitate obtained by suction filtration with washing liquid water and acetone in turn , the obtained solid was vacuum dried at 120°C for 8 hours, and the zirconium-based UiO-66-NH 2 Composite material, labeled Zr-UiO1.

Embodiment 2

[0024] The operation steps are the same as in Example 1, the difference is that the preparation of zirconium-based UiO-66-NH 2 When making composite materials, replace zirconium nitrate (pentahydrate) with 3.7g of zirconium chloride as a metal salt, and the final zirconium-based UiO-66-NH 2 The composite material is labeled Zr-UiO2.

Embodiment 3

[0026] Add 8.4g hafnium chloride and 4.5g 2-aminoterephthalic acid to the round bottom flask, then add a mixed solvent consisting of 90mL water and 60mL acetic acid, ultrasonically disperse for 10 minutes, stir and reflux at 120°C for 12 hours, and cool to At room temperature, add 30mL of sodium alginate aqueous solution with a mass concentration of 1% to the mixed solution, mix well, add hydrochloric acid dropwise to adjust the pH value to below 1, and filter the obtained precipitate with washing liquid methanol and acetone successively. The obtained solid was vacuum-dried at 120°C for 8 hours to obtain the hafnium-based UiO-66-NH 2 composite, labeled Hf-UiO.

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Abstract

The invention discloses a UiO-66-NH2 composite material used for palladium adsorption. The composite material comprises a main component namely UiO-66-NH2 and a modifying agent namely alginic acid, wherein the UiO-66-NH2 is a zirconium based metal organic skeleton or a hafnium based metal organic skeleton. The invention also discloses a preparation method for the composite material. According to the invention, through exploration of a UiO-66-NH2 modification manner, the UiO-66-NH2 composite material provided by the invention has a novel application for palladium adsorption, and has significantadsorption effect.

Description

technical field [0001] The invention belongs to the field of separation, recovery and utilization of palladium ions, in particular to a UiO-66-NH used to adsorb palladium 2 Composite materials and methods for their preparation. Background technique [0002] The main sources of palladium-containing solid waste include palladium-containing catalysts used in petroleum refining, air pollution treatment and other industries. The main source of palladium-containing waste liquid is the electroplating waste liquid in the process production of various electronic industries. The waste liquid is weakly acidic and the palladium content is ~ 50ppm. Palladium, gold and other precious metal production waste liquid contains ~ 10ppm of palladium. The workpiece cleaning wastewater after the metallization of printed circuit board holes, plastic electroplating and various non-metallic electroplating activation also contains a certain amount of palladium, and its content is ~ 1ppm. The study ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30
CPCB01J20/226
Inventor 冯建李敏肖鹏孟晓静蒋松山唐思汪麒林
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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