Ferric oxide/attapulgite/three-dimensional graphene oxide heterogeneous catalyst and preparation method thereof

A heterogeneous catalyst, attapulgite technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, catalyst carrier, etc., can solve the dissolution of Fe ions, broaden the pH range, and is not suitable for recycling and other problems, to achieve high adsorption capacity, improve catalytic performance, improve catalytic ability and impact resistance

Inactive Publication Date: 2019-05-17
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current research on heterogeneous Fenton catalysts still has the following problems: there will still be a small amount of Fe ions eluted during the reaction process; the pH range has not been practically broadened; the cost is high and it is not suitable for recycling

Method used

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  • Ferric oxide/attapulgite/three-dimensional graphene oxide heterogeneous catalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) The attapulgite raw soil was soaked in 1:1 hydrochloric acid for 1.5 hours, washed, filtered, and dried. After purification, the attapulgite content was 70% to 90%. The purified attapulgite clay was baked in a muffle furnace at 600 °C for 2 hours.

[0020] (2) Take 60 mL of concentrated sulfuric acid in a flask, add 1 g of graphite powder and 1 g of sodium nitrate, stir vigorously in a low-temperature water bath at 0-5 °C, then slowly add 6 g of potassium permanganate, and stir for 3 h. The reaction mixture was transferred to a water bath at 35 °C and stirred for 3 h, then 140 mL of deionized water was added, and stirred at room temperature for 12 h. Continue to add 200 mL of deionized water to the mixture, and then slowly add 20 mL of hydrogen peroxide. After the product is left to settle, it is first washed with 5% dilute hydrochloric acid, and then washed with deionized water until it is neutral. Ultrasonic at 100 Hz for 2 hours, a three-dimensional Graphene oxi...

Embodiment 2

[0024](1) The attapulgite raw soil was soaked in 1:1.5 hydrochloric acid for 2 hours, washed, filtered, and dried. After purification, the attapulgite content was 70% to 90%. The purified attapulgite clay was put into a muffle furnace and fired at 500°C for 2.5 hours.

[0025] (2) Take 60 mL of concentrated sulfuric acid in a flask, add 1 g of graphite powder and 1 g of sodium nitrate, stir vigorously in a low-temperature water bath at 0-5 °C, then slowly add 6 g of potassium permanganate, and stir for 3 h. The reaction mixture was transferred to a water bath at 35 °C and stirred for 3 h, then 140 mL of deionized water was added, and stirred at room temperature for 12 h. Continue to add 200 mL of deionized water to the mixture, and then slowly add 20 mL of hydrogen peroxide. After the product is left to settle, it is first washed with 5% dilute hydrochloric acid, and then washed with deionized water until it is neutral. Ultrasonic at 100 Hz for 2 hours, a three-dimensional Gr...

Embodiment 3

[0029] (1) The original attapulgite soil was soaked in 1:5 hydrochloric acid for 2 hours, washed, filtered, and dried. After purification, the attapulgite content was 70% to 90%. The purified attapulgite clay was baked in a muffle furnace at 550 °C for 2 hours.

[0030] (2) Take 60 mL of concentrated sulfuric acid in a flask, add 1 g of graphite powder and 1 g of sodium nitrate, stir vigorously in a low-temperature water bath at 0-5 °C, then slowly add 6 g of potassium permanganate, and stir for 3 h. The reaction mixture was transferred to a water bath at 35 °C and stirred for 3 h, then 140 mL of deionized water was added, and stirred at room temperature for 12 h. Continue to add 200 mL of deionized water to the mixture, and then slowly add 20 mL of hydrogen peroxide. After the product is left to settle, it is first washed with 5% dilute hydrochloric acid, and then washed with deionized water until it is neutral. Ultrasonic at 100 Hz for 2 hours, a three-dimensional Graphene ...

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Abstract

The invention discloses a preparation method of a ferric oxide/attapulgite/three-dimensional graphene oxide heterogeneous catalyst. According to the catalyst, a carrier prepared from attapulgite and three-dimensional graphene oxide through compounding is adopted, the carrier is loaded with ferric oxide nanoparticles, and the catalyst can be applied to catalyzed degradation treatment of refractoryorganic wastewater. The preparation method comprises the steps of firstly, purifying and activating the attapulgite, mixing the activated attapulgite with home-made graphene oxide, carrying out molding, carrying out drying, and then, loading the surface of the attapulgite/three-dimensional graphene composite carrier with the ferric oxide nanoparticles, thereby obtaining the ferric oxide/attapulgite/three-dimensional graphene oxide heterogeneous catalyst. The preparation method of the catalyst is relatively simple, does not need special equipment and is low in cost and good in repeatability; the prepared catalyst is good in catalysis performance and wide in pH range, can be reused and can be used at the temperature of 20 DEG C to 80 DEG C. Secondary pollution is not caused, and the catalystcan be extensively applied to the fields of treatment of the refractory organic wastewater.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to an iron oxide / attapulgite / three-dimensional graphene oxide heterogeneous catalyst and a preparation method thereof. Background technique [0002] Since the French scientist Fenton discovered in 1894 that the coexistence system of ferrous ions and hydrogen peroxide has an oxidation effect, Esienhouser used this system to successfully treat phenolic wastewater in 1964, creating a precedent for the application of Fenton reagents in wastewater treatment. Fenton technology roughly experienced a development process from traditional homogeneous Fenton method to UV / Fenton technology to heterogeneous Fenton system. The traditional Fenton method requires simple equipment, and can degrade most organic substances non-selectively under acidic conditions. The introduction of ultraviolet light and oxalate ligands improves the treatment effect of the system and makes the use of solar energy a reality. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J23/745B01J32/00B01J35/02C02F1/72C02F101/30
Inventor 张婷钱春园董玲玉王毅
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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