Preparation and application of magnetic microbial carbon-supported cerium and cobalt composite nano-ozone catalyst

A technology of magnetic microorganisms and catalysts, which is applied in the field of preparation of new magnetic catalysts, can solve the problems of suspended catalyst recovery, difficult recovery, loss, etc., and achieve the effect of solving difficult recovery, broad application prospects, and strong catalytic effect

Active Publication Date: 2022-05-17
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem that the carbon-supported metal nano-ozone catalyst prepared by microorganisms is difficult to recycle, especially in the field of water treatment, will be lost with water after operation. The recovery of suspended catalysts is a difficult problem in the field of catalysis.

Method used

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  • Preparation and application of magnetic microbial carbon-supported cerium and cobalt composite nano-ozone catalyst
  • Preparation and application of magnetic microbial carbon-supported cerium and cobalt composite nano-ozone catalyst
  • Preparation and application of magnetic microbial carbon-supported cerium and cobalt composite nano-ozone catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A magnetic microbial carbon-supported cerium and cobalt composite nano-ozone catalyst, which uses microbial Escherichia coli (Escherichia coli BL21) slag to produce adsorption and freeze-drying of cerium chloride ions and cobalt chloride, then adds potassium hydroxide and mixes evenly, and then thermochemically The magnetic microbial carbon-supported cerium and cobalt composite nano-ozone catalyst is obtained by processing. The surface of the carbon material is distributed with uniform metal nanoparticles. The carbon material carrier of the metal nano-ozone catalyst is prepared by thermochemically treating the slag of Escherichia coli (Escherichiacoli BL21) get. The microbial carbon carrier is carbon spheres and / or carbon nanotubes or irregular flaky nanocarbons, and the length of the carbon nanotubes is 200nm-1um; the particle diameter of the nanoparticles of the metal nano-ozone catalyst is 3-40nm.

[0033] In the present embodiment, the preparation method of magnetic...

Embodiment 2

[0040]A magnetic microbial carbon-supported cerium and cobalt composite nano-ozone catalyst. The microbial Pichia slag is used to adsorb and freeze-dry cerium chloride ions and cobalt chloride. After adding sodium hydroxide and mixing evenly, the magnetic microorganism is obtained by high-temperature carbonization. The carbon-supported cerium and cobalt composite nano-ozone catalyst has uniform metal nanoparticles distributed on the surface of the carbon material, and the carbon material carrier of the metal nano-ozone catalyst is prepared by carbonizing Pichia pastoris slag. The microbial carbon carrier is carbon spheres and / or carbon nanotubes or irregular flaky nanocarbons, and the length of the carbon nanotubes is 200nm-1um; the particle diameter of the nanoparticles of the metal nano-ozone catalyst is 3-40nm.

[0041] In the present embodiment, the preparation method of magnetic microbial carbon-supported cerium and cobalt composite nano-ozone catalyst comprises the steps:...

Embodiment 3

[0047] The magnetic microbial charcoal-loaded cerium prepared in Example 1, cobalt composite nano-ozone catalyst is placed in 100mg / L oxalic acid solution to catalyze ozone oxidation, specifically comprising the following steps:

[0048] Disperse the prepared 0.1g magnetic microbial carbon-loaded cerium and cobalt composite nano-ozone catalyst in the oxalic acid solution with a concentration of 100mg / L, pass through the ozone and use the aeration disc to aerate the oxalic acid with ozone, and after catalytic oxidation of ozone for 60min, the COD The removal rate increased by 49.54% (the removal rate reached 92%). This shows that micro-magnetic microbial carbon-supported cerium, cobalt composite nano-ozone catalyst has excellent performance. That is, the magnetic microbial carbon-supported cerium and cobalt composite nano-ozone catalyst prepared by the present invention can effectively promote the degradation of oxalic acid catalyzed by ozone, and has a good removal effect on o...

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Abstract

The invention discloses a magnetic microbial carbon-supported cerium and cobalt composite nano-ozone catalyst and a preparation method and application thereof. Microorganisms or microbial slag are used as adsorbents, after absorbing cerium and cobalt ions, potassium hydroxide is added to isolate air thermochemical treatment , so that the metal element and its oxide nanoparticles are precipitated on the surface and micropores of the carbonized microbial carbon material, thereby obtaining a paramagnetic microbial carbon-supported cerium and cobalt composite nanocatalytic material. The prepared magnetic microbial carbon-supported cerium and cobalt composite nano-catalytic materials respectively treat oxalic acid and coking wastewater, and have strong catalytic ozone oxidation effects, and the material recovery rate after magnetic separation is 99.9%, which can be efficiently magnetically recovered. The invention constructs a novel high-efficiency and environment-friendly magnetic catalyst preparation method, which effectively solves the problem that the biochar-supported metal nano-ozone catalyst is difficult to recover, and at the same time, the waste bacteria residues are recycled to produce high-value products.

Description

technical field [0001] The invention belongs to the field of preparation of novel magnetic catalysts, and in particular relates to a preparation method of a magnetic microbial carbon-supported cerium and cobalt composite nano-ozone catalyst, the application of catalytic ozone oxidation of organic pollutants in organic wastewater, and a method for magnetic recovery of materials. Background technique [0002] There have been many studies on carbon-supported metal nano-ozone catalysts prepared by microorganisms. This material has small size and uniform dispersion of metal particles, and it shows excellent performance in the field of energy storage and electrochemical fields. Fields also have huge advantages. However, the problem that the carbon-supported metal nano-ozone catalyst prepared by microorganisms is difficult to recycle, especially in the field of water treatment, will be lost with water after operation. The recovery of the suspended catalyst is a difficult problem in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J23/94B01J35/00B01J35/02B01J37/08C02F1/72C02F1/78C02F101/30C02F101/34C02F103/06C02F103/34C02F103/36
CPCB01J23/83B01J23/94B01J35/0033B01J35/023B01J37/084C02F1/725C02F1/78C02F2103/343C02F2103/06C02F2103/365C02F2101/308C02F2101/34Y02W10/37
Inventor 蓝泳茵谢建平冯宁宁
Owner CENT SOUTH UNIV
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