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Multi-element transition metal phosphide catalyst and preparation method and application thereof

A transition metal, phosphide technology, applied in physical/chemical process catalysts, chemical instruments and methods, water pollutants, etc., can solve the problems of difficult biodegradation, non-degradable drugs, hazards, etc., to achieve high environmental stability, reduce The effect of secondary pollution and speeding up the reaction rate

Pending Publication Date: 2021-11-30
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In my country, 244ng / L of acetaminophen has been detected in the ground water, and 36,788ng / L of ibuprofen has been detected in the domestic surface water. This kind of drug is enriched and ingested in the biological chain, causing potential huge harm to people's bodies.
[0003] At present, the effective ways to remove NSAIDs in sewage treatment plants are biodegradation and sludge adsorption, but due to the existence of trace levels in water and their refractory biodegradability, traditional sewage treatment processes cannot degrade this type of drugs

Method used

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  • Multi-element transition metal phosphide catalyst and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Multivariate transition metal phosphides (Co 2 P-FeP-Ni 2 P) The specific preparation method is as follows:

[0027] (1) Precursor preparation: take 0.5g of nickel nitrate Ni 2 (NO 3 ) 2 ·6H 2 O, with a certain amount of iron nitrate (Fe(NO 3 ) 3 9H 2 O, cobalt nitrate (Co(NO 3 ) 2 ·6H 2 (2) and 1.0g of cetyltrimethylammonium bromide are mixed and dissolved in deionized water and methanol mixed solvent, wherein the mol ratio of nickel nitrate, iron nitrate and cobalt nitrate is 3:1:1, sixteen The mass volume ratio of alkyltrimethylammonium bromide to deionized water is 1:8g / mL, and the volume ratio of deionized water to methanol is 1:4. Stir the mixture magnetically for 30 minutes, put it in the lining of a 100ml hydrothermal reaction kettle, seal it in a stainless steel hydrothermal reaction kettle, put it in an oven and react for 24 hours at 180°C, take it out, add methanol and deionized water respectively, and centrifuge at 7000rpm Alternately wash 4 time...

Embodiment 2

[0032] After adjusting the pH of the pollutant solution and the salt content of the solution, the degradation efficiency was measured.

[0033] Simultaneously add the multivariate transition metal phosphide (Co 2 P-FeP-Ni 2 P) and potassium monopersulfate, the multivariate transition metal phosphides (Co 2 P-FeP-Ni 2 The mass volume ratio of P) to the simulated pollutant acetaminophen solution is 1:2000g / mL, the concentration of potassium monopersulfate added in the pollutant solution is 1.0mmol / L, and the concentration of pollutant is 2500ng / L. 0.1mol dilute hydrochloric acid and 0.1mol sodium hydroxide solution to adjust the pH of the pollutant solution to 4.0, add sodium chloride to make the concentration of sodium chloride in the pollutant solution 0.1mol / L to increase the salt content of the solution, and use constant temperature shaking Bed reactor, shake the reaction at room temperature for 60min at a rate of 200rpm.

[0034] After the reaction, the waste water is f...

Embodiment 3

[0044] A multi-element transition metal phosphide (Co 2 P-FeP-Ni 2 P), the specific preparation method is as follows:

[0045] (1) Precursor preparation: take 0.5g of nickel nitrate Ni 2 (NO 3 ) 2 ·6H 2 O, with a certain amount of iron nitrate (Fe(NO 3 ) 3 9H 2 O, cobalt nitrate (Co(NO 3 ) 2 ·6H 2 (2) and 1.0g of cetyltrimethylammonium bromide are mixed and dissolved in deionized water and methanol mixed solvent, wherein the mol ratio of nickel nitrate, ferric nitrate and cobalt nitrate is 3:1:3, sixteen The mass volume ratio of alkyltrimethylammonium bromide to deionized water is 1:12g / mL, and the volume ratio of deionized water to methanol is 1:4. Stir the mixture magnetically for 30 minutes, put it in the lining of a 100ml hydrothermal reaction kettle, seal it in a stainless steel hydrothermal reaction kettle, put it in an oven and react for 20 hours at 120°C, take it out, add methanol and deionized water respectively, and centrifuge at 7000rpm Alternately wash ...

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Abstract

The invention discloses a multi-element transition metal phosphide catalyst and a preparation method and application thereof. According to the method, transition metal cobalt, iron and nickel are prepared into a corresponding phosphide (Co2P-FeP-Ni2P). In a persulfate system, the non-steroidal anti-inflammatory drugs in the wastewater are deeply degraded through the synergistic effect of the cobalt-iron-nickel multi-element metal phosphide, and the catalyst has the advantages of high purity, uniform particle morphology, complete crystal structure and good dispersity. Meanwhile, the catalyst has good catalytic capability on pollutants and is low in preparation cost. The cobalt-iron-nickel multi-element metal phosphide prepared by the method can activate peroxymonosulfate in a potassium hydrogen persulfate system to generate sulfate free radicals (SO4 <->.) with strong oxidizing property, so that low-concentration non-steroidal anti-inflammatory drugs are effectively degraded.

Description

technical field [0001] The invention belongs to the field of environmental protection, and relates to a multi-element transition metal phosphide catalyst and a preparation method and application thereof. Background technique [0002] For a long time, non-steroidal anti-inflammatory drugs (NSAIDs) have been one of the most used drugs in the world. It is used by about 30 million people around the world every year, and the annual prescription volume reaches 500 million. With the increasing use of NSAIDs, the daily increasing levels of these drugs detected in the water environment have attracted the attention of experts. Potential problems such as cardiovascular and gastrointestinal hemorrhage, which make the problem of NSAIDs in the water environment become the focus of the water treatment field. As a drug, it is very common in our daily life. The common ones are aspirin, acetaminophen, indomethacin, naproxen, naproxen, diclofenac, ibuprofen, nimesulide, roxime Fecoxib, Cele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J35/10B01J35/02C02F1/72C02F101/34B01J35/00
CPCB01J27/1853C02F1/722C02F2101/34B01J35/50B01J35/33B01J35/61
Inventor 武海霞刘壁铭樊佳炜
Owner NANJING UNIV OF TECH
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