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A kind of heterogeneous Fenton catalyst of nano-rod-shaped bismuth-doped molybdenum sulfide sphere and its preparation method and application

A nanorod-like catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of energy waste, waste of resources, low utilization rate, etc.

Active Publication Date: 2022-02-15
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the existence of the rate-limiting step in the classic Fenton reaction, not only the reactivity is poor under neutral conditions, but also there is a serious energy waste problem.
such as H 2 o 2 Finally, it is decomposed into oxygen by ineffective oxidation, making its utilization rate low; iron ions are continuously consumed, and finally a large amount of iron sludge is formed, which wastes resources and increases processing energy consumption

Method used

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  • A kind of heterogeneous Fenton catalyst of nano-rod-shaped bismuth-doped molybdenum sulfide sphere and its preparation method and application
  • A kind of heterogeneous Fenton catalyst of nano-rod-shaped bismuth-doped molybdenum sulfide sphere and its preparation method and application
  • A kind of heterogeneous Fenton catalyst of nano-rod-shaped bismuth-doped molybdenum sulfide sphere and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A nanorod-shaped bismuth-doped molybdenum sulfide sphere heterogeneous Fenton catalyst (CN-Bi-MoS 2 ) preparation method, said method comprising the following steps:

[0041] (1) 4.85g of Bi(NO 3 ) 3 ·5H 2 O, 1.77g of (NH 4 ) 6 Mo 7 o 24 4H 2 O and 3.78g CH 4 N 2 S was added to 180ml of deionized water, stirred at 45°C for 30 minutes and mixed to obtain mixed system A; then ultrasonically treated at 45°C for 30 minutes, and then stirred at 45°C for 30 minutes to obtain mixed system A;

[0042] (2) Transfer the mixed system A to an autoclave, and conduct a hydrothermal reaction at 200° C. for 24 hours to obtain the mixed system B;

[0043](3) Alternately washing the mixed system B with deionized water and absolute ethanol, drying at 60-100° C. for 4-20 h, and grinding to obtain the nanorod-shaped bismuth-doped molybdenum sulfide sphere heterogeneous Fenton catalyst.

[0044] The nano-rod-shaped bismuth-doped molybdenum sulfide sphere heterogeneous Fenton catal...

Embodiment 2

[0047] As a preparation method of a nanorod-shaped bismuth-doped molybdenum sulfide sphere heterogeneous Fenton catalyst in Example 1 of the present invention, the only difference between this example and the example is: the temperature of the hydrothermal reaction in step (2) is 180°C .

Embodiment 3

[0049] As a method for preparing a nanorod-shaped bismuth-doped molybdenum sulfide sphere heterogeneous Fenton catalyst in Example 1 of the present invention, the only difference between this example and the example is: the temperature of the hydrothermal reaction in step (2) is 220°C .

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Abstract

The invention provides a heterogeneous Fenton catalyst of nanorod-shaped bismuth-doped molybdenum sulfide spheres and its preparation method and application, the method comprising the following steps: (1) dissolving molybdate, bismuth salt and thiourea in deionized water Dissolve and disperse evenly to obtain a mixed system A; (2) Put the mixed system A in a closed reaction container, and conduct a hydrothermal reaction at a temperature of 180-220°C, and the hydrothermal reaction time is not less than 18 hours to obtain a mixed system B; (3) The mixed system B is alternately washed with deionized water and an organic solvent, and then dried to obtain the nanorod-shaped bismuth-doped molybdenum sulfide sphere heterogeneous Fenton catalyst. The inventive method of the present invention is simple in operation and low in cost. The catalyst of the present invention has a typical nanorod-coated spherical structure, has a large specific surface area, and has a high H 2 o 2 Utilization rate; and has good catalytic activity and stability, belongs to solid catalyst, easy to separate from water, easy to recycle and reuse.

Description

technical field [0001] The invention belongs to the field of preparation and application of water treatment catalyst materials, in particular to a nano-rod-shaped bismuth-doped molybdenum sulfide sphere heterogeneous Fenton catalyst and its preparation method and application. Background technique [0002] Environment and energy are two hot topics in the world today. The environmental significance of the Fenton reaction lies in the ability to use the hydroxyl radicals produced during the reaction to destroy the structure of organic pollutants. However, due to the existence of the rate-limiting step in the classic Fenton reaction, not only the reactivity under neutral conditions is poor, but also there is a serious energy waste problem. such as H 2 o 2 Finally, it is decomposed into oxygen by ineffective oxidation, making its utilization rate low; iron ions are continuously consumed, and finally a large amount of iron sludge is formed, which not only wastes resources but al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/051B01J35/10B01J37/10C02F1/72C02F101/30C02F101/34C02F101/38C02F101/36
CPCB01J27/051B01J35/1004B01J37/10B01J37/0036C02F1/725C02F1/722C02F2305/026C02F2101/308C02F2101/34C02F2101/38C02F2101/40C02F2101/345C02F2101/36
Inventor 吕来胡春卢超邓康兰
Owner GUANGZHOU UNIVERSITY
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