High-adsorption porous carbon supported zero-valent iron catalyst as well as preparation method and application thereof

A catalyst, zero-valent iron technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the reduction of oxidation efficiency, sulfate radical removal, secondary pollution and other problems, to achieve the effect of preventing iron agglomeration, facilitating recovery and separation, and stable physical and chemical properties

Active Publication Date: 2019-07-12
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the ferrous iron-activated persulfate technique still has its limitations
On the one hand, the rapid conversion of Fe(II) to Fe(III) leads to the rapid cessation of persulfate activation, on the other hand, excess Fe(II) will lead to sulfate radical scavenging, resulting in a decrease in oxidation efficiency; at the same time, a large amount of iron ions The loss of zero-valent iron may cause secondary pollution, while commercial nano-zero-valent iron products are expensive and easy to agglomerate

Method used

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  • High-adsorption porous carbon supported zero-valent iron catalyst as well as preparation method and application thereof
  • High-adsorption porous carbon supported zero-valent iron catalyst as well as preparation method and application thereof
  • High-adsorption porous carbon supported zero-valent iron catalyst as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0055] Add 1.0g of F127 surfactant (polyethylene oxide-polypropylene oxide triblock copolymer) into 11g of ethanol solution, then add 0.8g of phenolic resin (50wt%), stir for 10min to make it evenly mixed;

[0056] 1.0g Fe(NO 3 ) 3 9H 2 O was dissolved in 3g ethanol solution and added to the above mixed solution, then added 0.28g citric acid, stirred for 30min to evaporate the solvent in the mixed solution;

[0057] After the volatilization is complete, thermally polymerize at 100°C for 24h, and the obtained product is heated to 600°C under a nitrogen atmosphere and kept for 3h, then naturally cooled to room temperature; after grinding, a porous carbon-supported zero-valent iron catalyst PC / Fe( Figure 7 ).

[0058] figure 1 The XRD pattern of the porous carbon-supported zero-valent iron catalyst prepared for the present embodiment 1 is obtained by figure 1 It can be seen that the characteristic peaks of the prepared catalyst are consistent with the zero-valent iron, indi...

Embodiment 2

[0062] Add 1.0g of surfactant (polyoxyethylene / polyoxypropylene / polyoxyethylene amphiphilic block copolymer) into 11g of ether solution, then add 0.4g of chitosan, stir for 10min to make it evenly mixed;

[0063] 0.2g Fe(NO 3 ) 3 9H 2 O was dissolved in ether solution and added to the above mixed solution, then added 0.43g of ethylenediaminetetraacetic acid, stirred for 90min to volatilize the solvent in the mixed solution; then added 1g of peanut shells and stirred evenly;

[0064] After the volatilization is complete, thermally polymerize at 110°C for 24h, and the obtained product is heated to 800°C under an argon atmosphere for 2h, and then naturally cooled to room temperature; after grinding, the porous carbon-supported zero-valent iron catalyst PC / Fe can be obtained.

[0065] The obtained catalyst comprises a carbon-based carrier with a high specific surface area and a zero-valent iron catalyst loaded on the skeleton of the carbon-based carrier, the mass content of the ...

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Abstract

The invention discloses a high-adsorption porous carbon supported zero-valent iron catalyst as well as a preparation method and an application thereof and provides a new catalyst for an adsorbing andactivating oxidizing agent to decompose organic pollutants in soil and water. With high polymer and biomass as carbon sources, a compound catalyst with zero-valent iron supported in a porous carbon framework in a high-dispersion manner is prepared with a carbon thermal reduction one-step method. According to the prepared porous carbon supported zero-valent iron catalyst, nano zero-valent iron particles are uniformly distributed in the porous carbon framework, and the catalyst has a high specific surface area (500-1,000 m<2> / g) and large pore volume (0.3-0.7 cm<3> / g) and is magnetic. The preparation method of the catalyst can be used for batch production. The prepared catalyst can rapidly and massively adsorb organic pollutants, activate persulfate, hydrogen peroxide and other strong oxidizers, has the reaction activity higher than that of bivalent iron salt and imported commercial zero-valent iron and has broad application prospects in decomposing persistent organic pollutants in waterand soil.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a highly adsorbable porous carbon-loaded zero-valent iron catalyst and its preparation method and application. Background technique [0002] In recent years, with the rapid development of industrial industries such as coal chemical industry and textile printing and dyeing, the problem of water environmental pollution caused by the discharge of printing and dyeing wastewater and phenol-containing wastewater has become more and more serious. Among them, polycyclic aromatic hydrocarbons and chlorophenols (Chlorophenols, CPs) continue to appear in water and soil environments. These compounds are difficult to biodegrade, so they accumulate in the ground and water environmental systems, which may cause mutations and carcinogenesis in organisms. . The presence of different refractory organic pollutants has been detected in many rivers and soils in my country. A large amount of pollu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J23/745C02F1/72B01J20/30C02F101/34C02F101/36
CPCB01J20/02B01J20/20B01J23/745C02F1/722C02F1/725C02F2101/345C02F2101/36C02F2305/026
Inventor 钱旭芳赵一新吴韵雯方梦媛岳东亭严璇郭超
Owner SHANGHAI JIAO TONG UNIV
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