MOF-derived Fe0/Fe3C@ C/N magnetic mesoporous composite material and preparation method and application thereof

A composite material and mesoporous technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc., can solve problems such as ecological toxicity effects, insufficient stability, secondary pollution, etc., and achieve recovery Catalytic activity, wide adaptability, and rapid response

Pending Publication Date: 2021-06-25
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of insufficient stability of existing Fe-MOFs in the acidic PS system, leading to coordination dissociation and ligand dissolution, causing secondary pollution and ecotoxicity effects, in order to avoid this potential environmental risk , provided an Fe-MOF (Fe(Hbidc)) derived Fe 0 / Fe 3 C@C / N magnetic mesoporous composite material and its preparation method, and its new technology of activating PS to treat organic wastewater

Method used

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  • MOF-derived Fe0/Fe3C@ C/N magnetic mesoporous composite material and preparation method and application thereof
  • MOF-derived Fe0/Fe3C@ C/N magnetic mesoporous composite material and preparation method and application thereof
  • MOF-derived Fe0/Fe3C@ C/N magnetic mesoporous composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A MOF-derived Fe 0 / Fe 3 Preparation method 1 of C@C / N magnetic mesoporous composite material, the specific operation steps are as follows:

[0032] (1) Take 234mg (0.625mmol) [Fe(Cp)(CO 2 ) 2 ] 2 and 515 mg (2.5 mmol) H 3 Bidc was dissolved in 35mL of acetonitrile / water (v / v=4 / 3) mixed solvent, fully stirred at room temperature for 2h to obtain a uniform precursor solution, and transferred to a 100mL polytetrafluoroethylene-lined hydrothermal reactor;

[0033] (2) The reaction kettle was hydrothermally reacted at 160° C. for 24 hours, and then naturally cooled to room temperature. Alternately and repeatedly washing with methanol and deionized water, and suction filtering to obtain Fe(Hbidc) metal-organic framework material;

[0034] (3) Carry out vacuum drying treatment to Fe(Hbidc), and then place the powdered Fe(Hbidc) in nitrogen atmosphere at 10°C·min -1 The rate was raised to 800 °C, and calcined at this temperature for 5 h to obtain carbonization-derived F...

Embodiment 2

[0041] A MOF-derived Fe 0 / Fe 3 The preparation method 2 of C@C / N magnetic mesoporous composite material differs from that of Example 1 in that in step (1), the reactor is placed at 220°C for hydrothermal reaction. Other steps are consistent with the method of embodiment 1.

[0042] Fe 0 / Fe 3 Application of C@C / N magnetic mesoporous composites: prepare simulated organic wastewater with an initial SMX concentration of 10mg / L, and add 0.4g L to the wastewater -1 Fe prepared in embodiment 2 0 / Fe 3 C@C / N and 47.6mg·L -1 Oxidant PS, stir at room temperature to make the reaction uniform, take samples at 5, 10, 20, 30, 45, 60, 90, 120, and 180 minutes of reaction, and use HPLC to measure the remaining concentration of SMX in wastewater, and convert it into removal rate For: 37.9%, 63.0%, 84.3%, 92.1%, 95.8%, 96.9%, 97.5%, 97.8%, 98.1. Wastewater treatment efficiency is suitable with embodiment 1, it can be seen that the Fe prepared by embodiment 2 and embodiment 1 0 / Fe 3...

Embodiment 4

[0047] Fe 0 / Fe 3 The application of C@C / N magnetic mesoporous composite material is different from that in Example 2 in that the catalyst is the Fe prepared in Example 1 0 / Fe 3 C@C / N, other steps are the same as in Example 2. After the wastewater treatment reaction starts, samples are taken at regular intervals, and the remaining concentration values ​​of PS and TOC in the wastewater are respectively measured by potassium iodide (KI) spectrophotometry and total organic carbon (TOC) analyzer, and converted into Utilization rate and removal rate, the results are shown in Table 2.

[0048] Table 2

[0049]

[0050]

[0051] What table 2 shows is the Fe that embodiment 1 prepares 0 / Fe 3 C@C / N activates PS to treat SMC system, and the concentration of residual PS and residual TOC in wastewater changes with reaction time. As can be seen from the results, when the SMX removal rate was 99.5% (Table 1) after the reaction for 180min, the PS utilization rate reached 94.7%...

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Abstract

The invention discloses an MOF-derived Fe0 / Fe3C@ C / N magnetic mesoporous composite material and a preparation method and application thereof. Firstly, dicarbonyl cyclopentadienyl iron dimer is used as a metal source, benzimidazole-5, 6-dicarboxylic acid is used as an organic ligand, MOF: Fe (Hbidc) is prepared through a hydrothermal method, and then the carbonized derivative Fe<0> / Fe3C@C / N is obtained through high-temperature calcination. The preparation process is simple and controllable, and the preparation period is short. The Fe<0> / Fe3@ C / N nitrogen-doped iron-carbon nano composite material prepared by the method has high PS catalytic activity and strong ferromagnetism, is easy to separate and recover, can be recycled and regenerated, and has a good application prospect in the aspect of persulfate environment catalytic materials.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, in particular to a magnetic mesoporous composite material Fe derived from a metal organic framework (Metal Organic Framework, MOF) 0 / Fe 3 Synthesis of C@C / N and its method for treating organic wastewater by activating persulfate advanced oxidation system. Background technique [0002] Water pollution is an increasingly serious global environmental problem, threatening ecosystems and human existence. How to efficiently remove refractory organic pollutants in water and turn sewage into recyclable water resources is very important. Advanced Oxidation Technologies (Advanced Oxidation Technologies) based on persulfate (PS) utilizes strong oxidative free radicals or non-free radical reactive species to degrade pollutants, and has the advantages of high treatment efficiency, rapid response, non-selectivity, and pH adaptation range wide advantages. PS at normal temperature and pressu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/72C02F101/30C02F101/38
CPCB01J27/24B01J35/0033C02F1/725C02F1/722C02F2101/30C02F2209/20C02F2209/44C02F2101/40
Inventor 濮梦婕牛军峰
Owner DONGGUAN UNIV OF TECH
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