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Preparation method and application of sulfur-doped carbon skeleton coated heptairon octasulfide nanoparticle double-reaction-center Fenton-like catalyst

A technology of carbon skeleton and sulfur doping, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc. It can solve problems such as poor stability, easy agglomeration reaction pH range, metal ion leaching, etc., and reach the pores High efficiency, improved dispersion and stability, and improved activity

Active Publication Date: 2022-06-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of metal ion leaching, poor stability, easy agglomeration and narrow reaction pH range faced by existing Fenton-like catalysts, and provide a double reaction center of sulfur-doped carbon skeleton wrapped heptasulfide nanoparticles Preparation method and application of Fenton-like catalyst

Method used

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  • Preparation method and application of sulfur-doped carbon skeleton coated heptairon octasulfide nanoparticle double-reaction-center Fenton-like catalyst
  • Preparation method and application of sulfur-doped carbon skeleton coated heptairon octasulfide nanoparticle double-reaction-center Fenton-like catalyst
  • Preparation method and application of sulfur-doped carbon skeleton coated heptairon octasulfide nanoparticle double-reaction-center Fenton-like catalyst

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specific Embodiment approach 1

[0031] Specific embodiment one: The present embodiment of a sulfur-doped carbon skeleton wrapped eight sulfide heptaferros nanoparticles double reaction center Fenton catalyst preparation method, is completed according to the following steps:

[0032] First, the terephthalic acid and FeCl 3 ·6H 2 O was added to N, N-dimethylformamide, stirred, to give solution I.;

[0033] Second, the solution I. transferred to the hydrothermal reactor, and then at 110 ° C ~ 160 ° C for hydrothermal reaction, the reaction ended, to obtain an orange-yellow solution;

[0034]Third, the use of N, N-dimethylformamide and absolute ethanol on the orange-yellow solution repeatedly washed until the solution of the supernatant colorless, and then dried, to obtain MIL-101 (Fe) precursor;

[0035] Fourth, the MIL-101 (Fe) precursor is placed on one side of the porcelain boat, the other side is added with sublimation sulfur powder, and then covered with a porcelain boat, and there are gaps on both sides of th...

specific Embodiment approach 2

[0037] Specific embodiment two: The present embodiment and the specific embodiment of a difference is: the mass of terephthalic acid described in step one to N, N- dimethylformamide volume ratio of (0.4g ~ 0.5g) :(40mL ~ 60mL); FeCl as described in Step 1 3 ·6H 2 The volume ratio of O mass to N,N-dimethylformamide is (1.3g~1.6g):(40mL~60mL). Other steps are the same as the specific embodiment.

specific Embodiment approach 3

[0038] Specific embodiment three: the present embodiment and one or two of the specific embodiments are different from: the stirring time described in step one is 1h ~ 2h, the speed of stirring is 800r / min ~ 1000r / min. Other steps are the same as the specific embodiment one or two.

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Abstract

The invention relates to a preparation method and application of a Fenton-like catalyst, in particular to a preparation method and application of a sulfur-doped carbon skeleton coated octasulfide heptairon nanoparticle double-reaction-center Fenton-like catalyst. The invention aims to solve the problems of metal ion leaching, poor stability, easy agglomeration and narrow reaction pH range of the existing Fenton-like catalyst. The method comprises the following steps: firstly, preparing an MIL-101 (Fe) precursor, and then calcining and vulcanizing to obtain the sulfur-doped carbon skeleton coated octasulfide heptairon nanoparticle double-reaction-center Fenton-like catalyst. The invention discloses a sulfur-doped carbon skeleton coated heptairon octasulfide nanoparticle double-reaction-center Fenton-like catalyst which is used for degrading antibiotics. Under the neutral condition, the degradation rates of tetracycline hydrochloride, norfloxacin and amoxicillin within 40 min can reach 100%, 97.8% and 98.9% respectively, and after 5 times of circulation, the removal rate of amoxicillin can still be kept at 91.1%.

Description

Technical field [0001] The present invention relates to a kind of Fenton catalyst preparation method and application. Background [0002] The ecological risks caused by antibiotic emissions are not optimistic. Heterogeneous Fenton oxidation has received high attention as a technology that can treat stubborn pollutants, and its research hotspots have mainly focused on the research and development of Fenton-like catalysts that efficiently remove antibiotic contaminants. Common metal catalysts have problems such as metal ion leaching, poor stability, easy agglomeration, and narrow reaction pH range. In order to improve the above problems, the electron-poor / rich double reaction center Fenton catalyst material based on metal and carbon materials can not only coat metal nanoparticles to improve dispersion, stability and reduce ion dissolution, but also use the electron transmission channel between the spatially separated catalytic site and the adsorption site to achieve the replenishme...

Claims

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Application Information

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IPC IPC(8): B01J27/043B01J37/10B01J37/06B01J37/08B01J37/20C02F1/72C02F101/38C02F101/34
CPCB01J27/043B01J37/10B01J37/06B01J37/08B01J37/20C02F1/725C02F2101/38C02F2101/345C02F2101/40C02F2305/026B01J35/33Y02P20/584
Inventor 姚忠平张笑王亚辉郝悦宋平姜兆华
Owner HARBIN INST OF TECH
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