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Method for preparing block compound Fenton-like catalyst material, obtained material and application

A composite and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve secondary pollution, easy to generate sludge, and complex composite steps and other problems, to achieve the effect of convenient use and recycling, and reduce the steps of separation

Inactive Publication Date: 2019-07-19
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

What has been reported about FeO x / SiO 2 Composite Fenton-like catalytic materials are mostly powder, and SiO 2 The steps of compounding with iron are complicated, and the composite materials still have difficulties in recycling and reuse, easy to generate sludge and secondary pollution, etc.

Method used

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  • Method for preparing block compound Fenton-like catalyst material, obtained material and application
  • Method for preparing block compound Fenton-like catalyst material, obtained material and application
  • Method for preparing block compound Fenton-like catalyst material, obtained material and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Take 12.4 moles of water and 30.6 moles of absolute ethanol and mix and stir for 10 minutes, then add 1.68 moles of n-butylamine, stir for 30 minutes, then add 1 mole of tetraethyl orthosilicate, stir for 4 minutes and then let stand for 6 minutes. After the gel is aged for 1 hour, a wet gel is obtained; the wet gel is put into an oven at 80 o C drying for 4 hours to obtain SiO 2 dry gel.

[0043] (2) According to Fe / SiO 2 The molar ratio is 0.1, respectively weigh the corresponding iron oxide and SiO 2 The dry gel is put into a ball mill jar, and ball milled and compounded on a ball mill to obtain a compound powder.

[0044] (3) The composite powder is molded to obtain a green body. The green body material obtained was heated at a rate of 5 in a nitrogen atmosphere furnace. o C / min rises to 550 o C was calcined for 6 hours to obtain a bulk composite Fenton-like catalyst material.

[0045] (4) Add 0.5g of the prepared bulk composite Fenton-like catalyst mater...

Embodiment 2

[0048] (1) Same as embodiment 1.

[0049] (2) According to Fe / SiO 2 is 0.1, and the C / Fe molar ratio is 2, respectively weigh the corresponding SiO 2 The xerogel, iron oxide and carbon black powder are mixed, put into a ball mill tank, and ball milled on a ball mill to obtain a composite powder.

[0050] (3) The composite powder is molded to obtain a green body of the block composite material. The green body material obtained was heated at a rate of 5 in a nitrogen atmosphere furnace. o C / min rises to 550 o C was calcined for 6 hours to obtain a bulk composite Fenton-like catalyst material.

[0051] (4) Add 0.5g of the prepared bulk composite Fenton-like catalyst material to 50mL of 20mg / L methylene blue solution, add 1mL of 30% hydrogen peroxide solution, and place it in a water bath constant temperature oscillator for adsorption and degradation for 1~ 24 hours.

[0052] Through nitrogen adsorption and desorption analysis, the specific surface area of ​​the composite ma...

Embodiment 3

[0054] (1) ~ (2) with embodiment 2.

[0055] (3) The composite powder is molded to obtain a green body of the block composite material. The obtained green body material was heated in an air atmosphere muffle furnace at a heating rate of 5 o C / min rises to 550 o C was calcined for 6 hours to obtain a bulk composite Fenton-like catalyst material.

[0056] (4) Add 0.5g of the prepared bulk composite Fenton-like catalyst material to 50mL of 20mg / L methylene blue solution, add 1mL of 30% hydrogen peroxide solution, and place it in a water bath constant temperature oscillator for adsorption and degradation for 1~ 24 hours.

[0057] Through nitrogen adsorption and desorption analysis, the specific surface area of ​​the composite material is 599m 2 / g, the pore diameter is 12.1nm, and the pore volume is 0.785mL / g; the divalent and trivalent iron in the material account for 13.8% and 86.2% respectively; the material contains α-Fe 2 o 3 , γ-Fe 2 o 3 Crystal phase and Fe 3 o 4 ...

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Abstract

The invention provides a method for preparing a block compound Fenton-like catalyst by utilizing cheap ferric oxide (Fe2O3), an obtained material and application. The method comprises the following specific steps: carrying out ball mill composition on Fe2O3, carbon dust and SiO2 dry gel, pressing the mixture into a green body through mold shaping, and then carrying out calcinations under air or N2atmosphere to prepare the block compound Fenton-like catalyst with adsorption and catalytic functions. The obtained composite material has high removal efficiency for methylene blue in simulation wastewater.

Description

technical field [0001] The invention relates to a method for preparing block composite Fenton-like catalyst material, the obtained material and its application. Specifically involving the use of SiO 2 The method for preparing dry gel, iron oxide and carbon black by ball milling, molding and calcining to prepare block composite Fenton-like catalyst material and the obtained composite material and its application in adsorption and degradation of dye wastewater belong to the technical field of environmental materials. Background technique [0002] Dye wastewater pollutes the water environment and affects the survival of aquatic organisms. If it is in contact with the human body, it is also carcinogenic and poses a threat to human health. by Fe 2+ with H 2 o 2 The construction of Fenton system can generate hydroxyl radicals (·OH) with high reactivity, which is an advanced oxidation technology that can be used in the treatment of dye wastewater. The technology is highly effi...

Claims

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Application Information

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IPC IPC(8): B01J23/745C02F1/72C02F101/38C02F103/30
CPCB01J23/002B01J23/745C02F1/722C02F1/725C02F2101/308C02F2101/40C02F2103/30C02F2305/026
Inventor 刘世权刘璐
Owner UNIV OF JINAN
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