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Novel ferroferric oxide nano-particle and silicon oxide nano-fiber compounded Fenton-like catalyst and preparation method thereof

A technology of ferroferric oxide and nanofibers, applied in the direction of metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of strong hydrophobicity, chemical stability and thermal Poor stability, poor dispersibility and other problems, to achieve the effect of improving dispersibility, strong thermal and chemical stability, and enhanced firmness

Pending Publication Date: 2017-06-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the process of application, this carbon carrier has obvious defects: for example, the surface of carbon nanotubes has strong hydrophobicity and poor dispersion in water; secondly, the physical, chemical and thermal stability of carbonaceous materials in actual use are poor.

Method used

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  • Novel ferroferric oxide nano-particle and silicon oxide nano-fiber compounded Fenton-like catalyst and preparation method thereof
  • Novel ferroferric oxide nano-particle and silicon oxide nano-fiber compounded Fenton-like catalyst and preparation method thereof
  • Novel ferroferric oxide nano-particle and silicon oxide nano-fiber compounded Fenton-like catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh silicon oxide nanofibers (see the transmission electron microscope photo for the figure 1 ), the nanofibers have a diameter of 30-60 nm and a length of 5-20 μm. Silica nanofibers were completely dispersed in triethylene glycol at room temperature to form a homogeneous primary suspension. Weigh iron acetylacetonate, the mass ratio of iron acetylacetonate to silicon oxide nanofibers is 1:1, add iron acetylacetonate to the above primary suspension under vigorous stirring, and stir for 30 min. Under normal pressure, the suspension was heated to 195 °C at a rate of 3 °C / min in an argon protective atmosphere and kept for 15 min. Subsequently, under the same protective atmosphere conditions, the suspension was further heated to 285 °C at a rate of 8 °C / min, and then naturally cooled to room temperature after being kept warm for 30 min. After the suspension was separated from solid and liquid, it was washed three times with deionized water, and dried in an electric dryi...

Embodiment 2

[0035] Weigh silicon oxide nanofibers, the nanofibers have a diameter of 20-50 nm and a length of 1-10 μm. Silica nanofibers were completely dispersed in triethylene glycol at room temperature to form a homogeneous primary suspension. Weigh iron acetylacetonate, the mass ratio of iron acetylacetonate to silicon oxide nanofibers is 2:1, add iron acetylacetonate to the above primary suspension under vigorous stirring, and stir for 30 min. Under normal pressure, the suspension was heated to 190 °C at a rate of 3 °C / min in an argon protective atmosphere and kept for 10 min. Subsequently, under the same protective atmosphere conditions, the suspension was further heated to 280 °C at a rate of 10 °C / min, and then naturally cooled to room temperature after being kept warm for 35 min. After the suspension was separated from solid and liquid, it was washed three times with deionized water, and dried in an electric drying oven at 60 °C to constant weight. The dried product was calcine...

Embodiment 3

[0037] Weigh the silica nanofibers, the nanofibers have a diameter of 50-90 nm and a length of 2-15 μm. Silica nanofibers were completely dispersed in octadecene at room temperature to form a homogeneous primary suspension. Weigh iron acetylacetonate, the mass ratio of iron acetylacetonate to silicon oxide nanofibers is 3:1, add iron acetylacetonate to the above primary suspension under vigorous stirring conditions, and stir for 40 min. Under normal pressure, the suspension was heated to 200 °C at a rate of 3 °C / min in a nitrogen atmosphere and kept for 8 min. Subsequently, under the same protective atmosphere conditions, the suspension was further heated to 275 °C at a rate of 6 °C / min, and then naturally cooled to room temperature after being kept warm for 30 min. After the suspension was separated from solid and liquid, it was washed three times with deionized water, and dried in an electric drying oven at 60 °C to constant weight. The dried product was calcined at 450 °C...

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Abstract

The invention discloses a novel ferroferric oxide nano-particle and silicon oxide nano-fiber compounded Fenton-like catalyst and a preparation method thereof. The content of ferroferric oxide nano-particle in the catalyst is 15wt%-50wt%. The preparation method comprises the following steps: taking silicon oxide nano-fiber as a carrier; slowly heating and decomposing ferric acetylacetonate in an organic solvent, thereby generating fine ferroferric oxide nano-particle and growing on the surface of the silicon oxide nano-fiber carrier; quickly increasing the temperature, thereby increasing the degree of crystallinity of the nano-particle; and roasting, thereby forming the novel ferroferric oxide nano-particle and silicon oxide nano-fiber compounded Fenton-like catalyst. The novel ferroferric oxide nano-particle and silicon oxide nano-fiber compounded Fenton-like catalyst provided by the invention has the characteristics of easiness in magnetism recovery, excellent dispersity in water, high adsorption capacity, high Fenton catalytic activity, and the like. The invention has the advantages of simple preparation process, short production period, high controllability, low demand on equipment and easiness in large-scale production.

Description

technical field [0001] The invention belongs to the technical field of preparation of environmental protection functional materials, nanometer materials and catalytic materials, and in particular relates to a novel composite Fenton-like catalyst and a preparation method thereof. Background technique [0002] With the increasing development of industrialization, the production of toxic, harmful and refractory organic wastewater is increasing, and the environmental pollution caused by its discharge is becoming more and more prominent, which has become a major problem in environmental protection. Among many organic wastewater treatment methods, Fenton-like catalytic technology has been proved to be an effective method for degrading organic pollutants in wastewater. The complete oxidative degradation of organic matter into carbon dioxide, water and other harmless oxides is of great significance for the realization of green and efficient treatment of organic wastewater. At prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B82Y30/00C02F1/72C02F101/30
CPCB82Y30/00C02F1/725B01J23/745C02F2305/026C02F2101/30C02F2101/308
Inventor 刘琨唐学昆李自顺冯其明
Owner CENT SOUTH UNIV
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