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Praseodymium cobaltate/attapulgite/graphdiyne nanocomposite material, preparation method and application thereof

A nanocomposite material and attapulgite technology, which is applied in the field of praseodymium cobaltate/attapulgite/graphyne nanocomposite materials and its preparation, can solve the problems of limited application prospects, fast electron-hole recombination rate, etc., and achieve improved The effect of denitrification activity, accelerating electron transfer rate and avoiding agglomeration

Active Publication Date: 2018-12-18
JIANGSU HUAYUAN MINING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, photocatalysts are prepared by combining perovskite and clay. However, the combination of these two materials still has the problem of fast electron-hole recombination rate, which is common in photocatalytic materials, which largely limits the combination of the two materials in photocatalysis. Application prospects in the field of catalysis

Method used

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  • Praseodymium cobaltate/attapulgite/graphdiyne nanocomposite material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. First, dissolve 29.1000g of hexa[(trimethylsilyl)ethynyl]benzene in 10mL of 1mol / L tetrahydrofuran, add 0.2mL of 1mol / L tetrabutylammonium chloride (TBAF) under nitrogen protection, and The reaction was stirred at ℃ for 8 min, diluted with ethyl acetate, washed three times with saturated brine, dried over anhydrous sodium sulfate, and concentrated to obtain hexaethynylbenzene monomer. Under the protection of nitrogen, dissolve the hexaethynylbenzene monomer with 20mL pyridine, slowly drop into 40mL pyridine and 2cm 2 In the copper foil substrate, the reaction temperature is 60°C, the cross-coupling reaction of hexaethynylbenzene monomer is 48h, and graphyne is formed on the surface of the copper foil;

[0024] 2. Weigh 0.8776g of praseodymium nitrate, 0.5872g of cobalt nitrate, 0.8063g of complexing agent citric acid and 1g of attapulgite into deionized water and stir, and drop 2mL of ethylene glycol, and then transfer it to a water bath, Continue stirring at 70°C, ...

Embodiment 2

[0027] 1. First, dissolve 43.6g of hexa[(trimethylsilyl)ethynyl]benzene in 20mL of 1mol / L tetrahydrofuran, add 0.4mL of 1mol / L tetrabutylammonium chloride (TBAF) under nitrogen protection, and set the temperature at 8°C The reaction was stirred for 10 min, diluted with ethyl acetate, washed three times with saturated brine, dried over anhydrous sodium sulfate, and concentrated to obtain hexaethynylbenzene monomer. Under nitrogen protection, dissolve the hexaethynylbenzene monomer with 30mL pyridine, slowly drop into 50mL pyridine and 4cm 2 In the copper foil substrate, the reaction temperature is 70°C, the cross-coupling reaction of hexaethynylbenzene monomer is 60h, and graphyne is formed on the surface of the copper foil;

[0028] 2. Weigh 0.8776g of praseodymium nitrate, 1.7615g of cobalt nitrate, 1.9230g of complexing agent citric acid and 3g of attapulgite into deionized water and stir, and drop 4mL of ethylene glycol, and then transfer it to a water bath, Continue stirr...

Embodiment 3

[0031] 1. First, dissolve 58.1g of hexa[(trimethylsilyl)ethynyl]benzene in 30mL of 1mol / L tetrahydrofuran, add 0.6mL of 1mol / L tetrabutylammonium chloride (TBAF) under the protection of nitrogen, and set the temperature at 10°C The mixture was stirred and reacted for 12 minutes, diluted with ethyl acetate, washed three times with saturated brine, dried over anhydrous sodium sulfate, and concentrated to obtain hexaethynylbenzene monomer. Under nitrogen protection, dissolve the hexaethynylbenzene monomer with 40mL pyridine, slowly drop into 60mL pyridine and 6cm 2 In the copper foil substrate, the reaction temperature is 80°C, the cross-coupling reaction of hexaethynylbenzene monomer is 72h, and graphyne is formed on the surface of the copper foil;

[0032]2. Weigh 0.8776g of praseodymium nitrate, 2.9358g of cobalt nitrate, 4.3938g of complexing agent citric acid and 5g of attapulgite into deionized water and stir, and add 6mL of ethylene glycol dropwise, then transfer it to a w...

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Abstract

Belonging to the field of new chemical materials, the invention in particular relates to a praseodymium cobaltate / attapulgite / graphdiyne nanocomposite material, a preparation method and application thereof. The method includes: firstly carrying out metal-catalyzed cross coupling reaction to prepare graphdiyne, then taking attapulgite as the carrier to load praseodymium cobaltate by sol-gel process, finally utilizing the unique acetylenic bond in graphdiyne material to induce the positively charged characteristic of parts of carbon atoms in a carbon skeleton, and loading praseodymium cobaltate / attapulgite on a graphdiyne sheet layer. According to the invention, attapulgite is taken as the skeleton, on which perovskite nanoparticles are evenly loaded, agglomeration of perovskite particles isavoided, attapulgite is evenly dispersed on graphdiyne, the special structure of graphdiyne itself is utilized to construct a Z type photocatalyst, which can inhibit the electron-hole compounding ofpraseodymium cobaltate and attapulgite, prolong the lifetime of charge carriers, well give play to the synergistic catalysis role of the three substances, and improve the optical coupling denitrationperformance.

Description

technical field [0001] The invention belongs to the field of new chemical materials and relates to a nano-composite material of praseodymium cobaltate / attapulgite / graphyne and its preparation method and application. Background technique [0002] In recent years, large-scale industrial production has made air pollution more and more serious. Among them, nitrogen oxides, as one of the main air pollutants, seriously threaten human ecosystems and health. Therefore, the control of nitrogen oxides has become urgent. Optical coupling denitrification technology combines the characteristics of photocatalysis and conventional SCR, has the characteristics of low temperature and high efficiency, and has a good application prospect. [0003] Perovskite (ABO 3 ) structure of rare earth composite metal oxides has attracted much attention because of its good photoresponse range, high structural stability, low price, easy to obtain raw materials, and simple synthesis. However, the size of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/56B01J20/20B01J20/30B01J23/83
CPCB01D53/02B01D53/8628B01J20/12B01J20/20B01J23/83B01J35/39
Inventor 姚超夏建文李霞章左士祥严向玉刘文杰夏青
Owner JIANGSU HUAYUAN MINING
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