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MoS2-enhanced heterogeneous Fenton photocatalyst and preparation method thereof

A photocatalyst and heterogeneous technology, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve problems such as rare reports, and overcome bottlenecks , promote conversion, increase the effect of speed

Active Publication Date: 2019-04-09
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These features make MoS 2 As a cocatalyst, it shows good application potential in improving the photocatalytic activity of heterogeneous Fenton system, but the related research is still rarely reported.

Method used

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  • MoS2-enhanced heterogeneous Fenton photocatalyst and preparation method thereof
  • MoS2-enhanced heterogeneous Fenton photocatalyst and preparation method thereof
  • MoS2-enhanced heterogeneous Fenton photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Accurately weigh 0.5 g of amidoxime modified polyacrylonitrile fiber with a weight gain rate of 30%, and place it in 50 ml of DMF / water (volume ratio of 1: 4) mixed solution of 3.0 mmol / L hemin After reacting for 2 hours at 50°C under stirring conditions, it was taken out, washed and dried repeatedly with DMF and distilled water to obtain a hemin catalyst supported on modified polyacrylonitrile fibers.

[0021] 2) Place the modified polyacrylonitrile fiber-loaded hemin catalyst obtained in step 1 in 50ml of water, adjust the pH of the system to 2 with hydrochloric acid, stir at room temperature for 40min, and then add a concentration of 0.03mmol / L to the system Ammonium tetrathiomolybdate, and then stirred for 40min.

[0022] 3) Stir the catalyst obtained in step 2 under airtight conditions at 90°C for 3 hours, then take it out and wash and dry it repeatedly with distilled water to obtain the first MoS 2 Enhanced heterogeneous Fenton photocatalysts.

[0023] Determ...

Embodiment 2

[0025] Adjust the concentration of ammonium tetrathiomolybdate in Step 2 of Example 1 to 0.038mmol / L, and the rest are the same as in Example 1 to obtain the second MoS 2 Enhanced heterogeneous Fenton photocatalysts. Through measurement and calculation, the iron content on the catalyst is 0.811 mg / g, and the molybdenum content is 10.36 mg / g.

Embodiment 3

[0027] Adjust the concentration of ammonium tetrathiomolybdate in Step 2 of Example 1 to 0.05mmol / L, and the rest are the same as in Example 1 to obtain the third MoS 2 Enhanced heterogeneous Fenton photocatalysts. Through measurement and calculation, the iron content on the catalyst is 0.982 mg / g, and the molybdenum content is 12.14 mg / g.

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Abstract

The invention relates to an MoS2-enhanced heterogeneous Fenton photocatalyst and a preparation method thereof. The catalyst has a fibrous appearance and is prepared by taking modified polyacrylonitrile fiber as a carrier and loading MoS2 and chlorhematin (hemin). The preparation method comprises the steps: firstly, making the modified polyacrylonitrile fiber containing an amidoxime group react with a DMF / water mixed solution of hemin, then, making the obtained fiber react with ammonium tetrathiomolybdate serving as a molybdenum source under an acidic condition to obtain the MoS2-enhanced heterogeneous Fenton photocatalyst. The catalyst disclosed by the invention is suitable for an oxidative degradation reaction of organic pollutants in water such as dyes; and compared with the prior art, MoS2 introduced to the MoS2-enhanced heterogeneous Fenton photocatalyst can be used for remarkably improving the adsorption property and visible light catalytic activity of the heterogeneous Fenton photocatalyst to organic pollutants.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis and wastewater treatment, and specifically relates to MoS used in the field of oxidative degradation of organic pollutants such as dyes in wastewater 2 Enhanced heterogeneous Fenton photocatalyst and its preparation method. Background technique [0002] Heterogeneous Fenton technology has received widespread attention in the treatment of high-concentration, refractory, toxic and harmful wastewater, in which iron ionophores involve materials such as clay, zeolite, ion exchange resin, alginate gel microspheres, Nafion membrane, and polyacrylonitrile fiber . Among them, polyacrylonitrile fibers have unique advantages such as cheap and easy to obtain, excellent physical and chemical properties, and flexible application methods, and can introduce active groups through chemical modification of side chain cyano groups, and heterogeneous Fenton prepared by coordinating and loading Fe ions The cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/34C02F1/72C02F101/30
CPCC02F1/725B01J31/34C02F2305/10C02F2101/308B01J35/39
Inventor 韩振邦姬晓洁刘利伟赵晓明
Owner TIANJIN POLYTECHNIC UNIV
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