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A kind of ZIF-8 molecular sieve loaded multi-element metal Fenton catalyst and its preparation method and application

A ZIF-8, multi-metal technology, used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of complex post-processing, increase processing costs, etc., to improve selectivity and stability. , the effect of improving catalytic activity

Active Publication Date: 2020-09-25
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the traditional homogeneous Fenton system, only when the pH value is between 2 and 4 can the reaction be carried out effectively, so it is necessary to repeatedly adjust the pH value of the wastewater, which increases the treatment cost, and the catalyst in the homogeneous Fenton system dissolves In wastewater, a large amount of iron-containing sludge will be produced after the reaction, and the post-treatment is complicated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A ZIF-8 molecular sieve supported multi-element metal Fenton catalyst is prepared by the following steps:

[0044] Weigh a certain amount of FeSO 4 ·7H 2 O, CuSO 4 ·5H 2 O and CoSO 4 ·7H 2 O, the configuration concentration is 0.5mol / L Fe 2+ , 0.5mol / L Cu 2+ , 0.5mol / L Co 2+ Aqueous solution, stir evenly to obtain a mixed solution; respectively take 100mL mixed solution and add 1mol / L H in a beaker 2 SO 4 Solution, adjust the pH value to 2-3 to obtain a mixed solution, then add 300mg ZIF-8 molecular sieve to the above mixed solution, stir evenly to obtain a ZIF-8 dispersion, add 1mol / L NaOH solution to adjust the pH value to 9-11 At this time, the solution appears precipitated, and the precipitated solution is suction filtered to obtain the filter residue and filtrate, the filter residue is washed with deionized water until neutral, the washed filter residue is vacuum-dried at 60°C for 8h, then dried at 100°C for 2h, and ground Finally, a solid powder is obtai...

Embodiment 2

[0053] A ZIF-8 molecular sieve supported multi-element metal Fenton catalyst is prepared by the following steps:

[0054] Weigh a certain amount of FeSO 4 ·7H 2 O, CuSO 4 ·5H 2 O and CoSO 4 ·7H 2 O, the configuration concentration is 1mol / L Fe 2+ , 0.5mol / L Cu 2+ , 0.5mol / L Co 2+ Aqueous solution, stir evenly to obtain a mixed solution; respectively take 100mL mixed solution and add 1mol / L H in a beaker 2 SO 4 Solution, adjust the pH value to 2-3 to obtain a mixed solution, then add 300mg ZIF-8 molecular sieve to the above mixed solution, stir evenly to obtain a ZIF-8 dispersion, add 1mol / L NaOH solution to adjust the pH value to 9-11 At this time, the solution appears precipitated, and the precipitated solution is suction filtered to obtain the filter residue and filtrate, the filter residue is washed with deionized water until neutral, the washed filter residue is vacuum-dried at 60°C for 8h, then dried at 100°C for 2h, and ground Finally, a solid powder is obtaine...

Embodiment 3

[0063] A ZIF-8 molecular sieve supported multi-element metal Fenton catalyst is prepared by the following steps:

[0064] Weigh a certain amount of FeSO 4 ·7H 2 O, CuSO 4 ·5H 2 O and CoSO 4 ·7H 2 O, the configuration concentration is 1.5mol / L Fe 2+ , 0.5mol / L Cu 2+ , 0.5mol / L Co 2+ Aqueous solution, stir evenly to obtain a mixed solution; respectively take 100mL mixed solution and add 1mol / L H in a beaker 2 SO 4 Solution, adjust the pH value to 2-3 to obtain a mixed solution, then add 300mg ZIF-8 molecular sieve to the above mixed solution, stir evenly to obtain a ZIF-8 dispersion, add 1mol / L NaOH solution to adjust the pH value to 9-11 At this time, the solution appears precipitated, and the precipitated solution is suction filtered to obtain the filter residue and filtrate, the filter residue is washed with deionized water until neutral, the washed filter residue is vacuum-dried at 60°C for 8h, then dried at 100°C for 2h, and ground Finally, a solid powder is obtai...

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Abstract

The invention provides a ZIF-8 molecular sieve-supported multielement metal Fenton catalyst, prepared by: using ZIF-8 molecular sieve as a supporter and FeSO4 7H2O, CuSO4 5H2O and CoSO4 7H2O as precursors to perform co-precipitating, aging, performing suction filtering, washing, drying, and calcining. The invention also provides a preparation method and application of the catalyst. The catalyst provided herein has high treatment efficiency for wastewater, is widely applicable, and rarely causes secondary pollution.

Description

technical field [0001] The invention relates to a catalyst, in particular to a ZIF-8 molecular sieve-loaded multi-element metal Fenton catalyst and its preparation method and application. Background technique [0002] With the development of my country's economy and the growth of people's demand for medical care, my country's pharmaceutical industry has grown rapidly, and the wastewater discharged by the pharmaceutical industry has become the main source of water environmental pollution. As high-concentration refractory wastewater, pharmaceutical wastewater is mainly typified by traditional Chinese medicine extraction wastewater, chemical pharmaceutical wastewater, and antibiotic wastewater. The main characteristics of pharmaceutical wastewater are complex components, many types of organic pollutants, and high concentrations. The biodegradability of this type of wastewater is poor, and it is difficult to meet the discharge standards by conventional processes. In addition, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22B01J37/03C02F9/00C02F103/34
CPCB01J31/1691B01J31/1815B01J37/031C02F1/66C02F1/722C02F9/00C02F2001/007C02F2103/343C02F2305/026
Inventor 李换英白书立刘敏超
Owner WUYI UNIV
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