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MoS2/schwertmannite Fenton composite catalyst, and preparation method and application thereof

A composite catalyst, a mannite-like Fenton technology, applied in physical/chemical process catalysts, chemical instruments and methods, special compound water treatment, etc. The effect of transferring, promoting the dissolution rate, and reducing the processing cost

Active Publication Date: 2019-07-12
NANJING AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalyst must use visible light to promote the Fenton-like reaction, and it cannot achieve a good catalytic effect under dark conditions, so the application range is limited to a certain extent.

Method used

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  • MoS2/schwertmannite Fenton composite catalyst, and preparation method and application thereof
  • MoS2/schwertmannite Fenton composite catalyst, and preparation method and application thereof
  • MoS2/schwertmannite Fenton composite catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] MoS of this example 2 The preparation process of the Schwittmann stone-like Fenton composite catalyst comprises the following steps:

[0041] (1) Add 0.3g MoS to the Erlenmeyer flask 2 and ultrapure water, keeping the total reaction volume at 500mL, placed in an ultrasonic instrument for 5min to obtain MoS 2 the dispersion liquid;

[0042] (2) Use 1M H 2 SO 4 (or NaOH) to adjust the MoS 2 pH of the dispersion to 2.5;

[0043] (3) Add 11.12g FeSO 4 ·7H 2 O and 6mL H 2 o 2 (30w%), to obtain the mixed solution, the mixed solution is placed at 180r min -1 Shake culture in a reciprocating shaker for 24 hours at a culture temperature of 28°C to obtain a precipitate;

[0044] (4) The obtained precipitate was collected by filtration with a 0.45 μm filter membrane, washed with sulfuric acid solution (p H=2.0) and neutral deionized water (p H=6.8), rinsed three times respectively, and dried at constant temperature Dry in the box at 60°C and save the samples.

[0045]...

Embodiment 2

[0052] MoS of this example 2 The preparation process of the Schwittmann stone-like Fenton composite catalyst comprises the following steps:

[0053] (1) Add 0.5g MoS to the Erlenmeyer flask 2 and ultrapure water, keeping the total reaction volume at 500mL, placed in an ultrasonic instrument for 8 minutes to obtain MoS 2 the dispersion liquid;

[0054] (2) Use 1M H 2 SO 4 (or NaOH) to regulate MoS 2 The pH of the dispersion is 3.5;

[0055] (3) Add 11.12g FeSO 4 ·7H 2 O and 6 mL of H 2 o 2 (30w%); place the mixture at 180r·min -1 In a reciprocating shaker, the culture temperature is 28°C, and the culture is shaken for 24 hours;

[0056] (4) The precipitate obtained was collected by filtration with a 0.45 μm filter membrane, and the precipitate was washed with sulfuric acid solution (p H=2.0) and neutral deionized water (p H=6.8), washed three times respectively, and dried at constant temperature Dry in the box at 60°C and save the samples.

Embodiment 3

[0058] MoS of this example 2 The preparation process of the Schwittmann stone-like Fenton composite catalyst comprises the following steps:

[0059] (1) Add 0.1g MoS to the Erlenmeyer flask 2 and ultrapure water, keeping the total reaction volume at 500mL, placed in an ultrasonic instrument for 10min; to obtain MoS 2 the dispersion liquid;

[0060] (2) Use 1M H 2 SO 4 (or NaOH) to regulate MoS 2 The pH of the dispersion is 2.0;

[0061] (3) Add 11.12g FeSO 4 ·7H 2 O and 6mL H 2 o 2 (30w%); place the mixture at 180r·min -1 Shake culture in a reciprocating shaker for 24 hours at a culture temperature of 28°C to obtain a precipitate;

[0062] (4) The precipitate obtained was collected by filtration with a 0.45 μm filter membrane, and the precipitate was washed with sulfuric acid solution (p H=2.0) and neutral deionized water (p H=6.8), washed three times respectively, and dried at constant temperature Dry in the box at 60°C and save the samples.

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Abstract

The invention discloses an MoS2 / schwertmannite Fenton composite catalyst, and a preparation method and application thereof, and belongs to the field of water treatment. The structure of the compositecatalyst is as follows: MoS2 with a lamellar structure is distributed on the surface of sphere-shaped schwertmannite. In an X-ray diffraction (XRD) pattern of the catalyst, characteristic diffractionpeaks of schwertmannite exist at positions of 26.26 degrees, 35.16 degrees, 46.53 degrees and 61.34 degrees, and characteristic diffraction peaks of MoS2 exist at positions of 14.38 degrees, 32.67 degrees, 35.87 degrees, 39.53 degrees, 49.79 degrees, 58.33 degrees and 72.79 degrees. The composite catalyst can accelerate circulation of Fe<3+> / Fe<2+> in a Fenton-like oxidation reaction under illumination and light-shielding states, and oxidation reaction efficiency is promoted. The invention further provides the preparation method of the catalyst and application of the catalyst in the field of wastewater treatment.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a Fenton-like composite catalyst for degrading phenol in water, a preparation method and application thereof. Background technique [0002] Among environmental pollutants, phenolic wastewater has attracted widespread attention from society due to its high stability and accumulation. Especially phenol is extremely harmful to human health. my country's drinking water quality standard (GB5749-2006) formulated in 2006 stipulates that the concentration of volatile phenols must be less than 0.002mg / L. At present, the methods for industrially treating phenol-containing organic wastewater mainly include membrane separation method, adsorption method, and other physical methods and electrolysis methods, Fenton method, ozone oxidation method and photocatalytic oxidation method in chemical methods. Among them, Fenton method is due to Its simple operation and low cost make it an e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/053C02F1/72C02F101/34
CPCB01J27/053C02F1/722C02F2101/345C02F2305/026
Inventor 周立祥陈艳梅
Owner NANJING AGRICULTURAL UNIVERSITY
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