Titanium/zirconium-doped cerium-based metal organic framework material for degrading paraoxon methyl

A methyl paraoxon, organic framework technology, applied in the direction of organic compound/hydride/coordination complex catalyst, water/sewage treatment, chemical/physical process, etc., can solve the risk of excessive pesticide residues, pesticide use increase and other problems, to achieve the effects of low price, high degradation efficiency, and rapid preparation

Pending Publication Date: 2022-06-03
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, as pesticide use increases, so does the risk of excess pesticide residues in food and the environment

Method used

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  • Titanium/zirconium-doped cerium-based metal organic framework material for degrading paraoxon methyl
  • Titanium/zirconium-doped cerium-based metal organic framework material for degrading paraoxon methyl
  • Titanium/zirconium-doped cerium-based metal organic framework material for degrading paraoxon methyl

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 7.018g of cerium nitrate, dissolve into 24mL of ultrapure water, and give 0.5333mol / L of aqueous cerium nitrate solution. Weigh 2.124 g of terephthalic acid to a round bottom flask containing 75 mL of N, N-dimethylformamide. Under the condition of continuous magnetic stirring, an aqueous solution of cerium ammonium nitrate was added. The flask is sealed, magnetically stirred for 30 min at room temperature to make it mix evenly, and then heated for 30 min under the condition of continuous magnetic stirring at 100 °C. The obtained solution is cooled to room temperature, centrifuged for collection to obtain a pale yellow pellet. Centrifuged washes (6000 r / min) 3 times with N, N-dimethylformamide and alcohol, respectively. The resulting UiO-66(Ce) precipitate was separated from ethanol and then dried in vacuum overnight in an electrothermal vacuum drying chamber at 80 °C.

Embodiment 2

[0035] The ratio of Ce / Ti is controlled by changing the molar ratio of the raw material. Weigh a certain mass of titanium dichlorodiclodiene (TiCp 2 Cl 2 with UiO-66 (Ce). Under the condition of continuous magnetic agitation, the weighed drug is added to a round-bottom flask containing 125mL of N, N-dimethylformamide. Magnetically stirred at room temperature for 30min to obtain a homogeneous solution, and then under the condition of continuous magnetic stirring at 100 ° C, heating for 5h. The resulting solution is cooled to room temperature and centrifuged to collect (6000 r / min) of the pellet. Wash 3 times with N, N-dimethylformamide and alcohol, respectively. The resulting Ti is isolated from ethanol x / Ce-UiO-66 precipitated in an electrothermal vacuum drying chamber at 80 °C for vacuum drying overnight. Ti in different proportions x The synthesis method of / Ce-UiO-66 is the same except for the amount of raw materials added, and the temperature and time of synthesis are the sam...

Embodiment 3

[0037]Weigh 11.6880g of cerium nitrate, dissolve into 40mL of ultrapure water, and prepare into an aqueous solution of 0.533mol / L of cerium nitrate (A liquid). Weigh 2.4649g of zirconium nitrate, dissolve into 20mL of ultrapure water, and prepare 0.533mol / L of zirconium nitrate aqueous solution (B solution). Weigh 1.276g of terephthalic acid, dissolve in a 250mL flask containing 36mL of N, N-dimethylformamide under the condition of continuous magnetic stirring, and then add 10.3mL of formic acid dropwise in the mixture. Different proportions of Zr are synthesized by controlling the volume ratio of liquid A and B x / Ce-UiO-66。 Seal the flask, magnetically stir at room temperature for 30min, and then heat for 30min under the condition of continuous magnetic stirring at 100 °C. The resulting solution is cooled to room temperature and centrifuged to collect (6000 r / min) of the pellet. The resulting pellet was washed twice by centrifugation with N, N-dimethylformamide and 4 times by ac...

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Abstract

The invention discloses a method for applying a titanium/zirconium-doped cerium-based metal organic framework to degradation of methyl paraoxon. According to the invention, ceric ammonium nitrate is used as a metal ion source, terephthalic acid is used as a ligand, and a cerium-based metal organic framework (UiO-66) is synthesized by adopting a solvothermal method; mixing and heating the synthesized UiO-66 and titanocene dichloride by adopting a cation exchange method, so as to synthesize Tix/Ce-UiO-66; the preparation method comprises the following steps: mixing a metal ion source ceric ammonium nitrate and zirconyl nitrate, and synthesizing Zrx/Ce-UiO-66 by adopting a solvothermal method; the synthesized materials are used for degrading methyl paraoxon. The method for degrading methyl paraoxon has the advantages of simplicity in operation, rapidness in preparation, low cost and the like.

Description

Technical field [0001] The present invention belongs to the field of organophosphorus pesticide degradation, specifically relates to a cerium fund doped titanium / zirconium cerium fund organic framework for the degradation of methyl paraoxidus. Background [0002] Pesticides play an important role in agriculture, and about one-third of the world's agricultural output value increases depend on the use of pesticides. Unfortunately, the increase in pesticide use is accompanied by an increase in the risk of excessive pesticide residues in food and the environment. Organophosphorus pesticides are one of the most widely used pesticides in the world, accounting for more than 50% of most commercially used pesticides, and it has become one of the most common causes of pesticide poisoning worldwide. Therefore, it is of great significance to develop a rapid and efficient method for degrading organophosphorus pesticides. [0003] The development of nanotechnology provides new degradation id...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J37/30B01J37/03B01J35/10C02F1/00C02F1/28C02F101/30C02F101/34C02F101/38
CPCB01J31/1691B01J31/1658B01J31/2239B01J35/1004B01J37/30B01J37/031C02F1/285C02F1/00C02F2101/30C02F2101/34C02F2101/38C02F2101/306Y02W10/37
Inventor 刘继锋曹昕
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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