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Preparation method and application of three-dimensional nano-perovskite composite heterogeneous fenton catalyst

A perovskite-type, three-dimensional nanotechnology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of easy dissolution of active components and catalyst deactivation , Difficult to reuse and other issues, to achieve the effect of improving load capacity and dispersibility, high stability, and enhancing stability

Inactive Publication Date: 2016-01-20
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the efficiency of most of the current heterogeneous Fenton technology treatment methods is not high, and the pH value is still in the range of 2 to 4; the active components are easy to dissolve during the reaction process, which not only causes the deactivation of the catalyst, but is difficult to repeat use

Method used

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  • Preparation method and application of three-dimensional nano-perovskite composite heterogeneous fenton catalyst
  • Preparation method and application of three-dimensional nano-perovskite composite heterogeneous fenton catalyst
  • Preparation method and application of three-dimensional nano-perovskite composite heterogeneous fenton catalyst

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Effect test

Embodiment 1

[0033] (1) Preparation of carbon airgel

[0034] The sol-gel phenolic polymerization method uses resorcinol and formaldehyde as raw materials, sodium carbonate as a catalyst, and stands still under the molar ratio of resorcinol, formaldehyde, catalyst and water 1:2:0.008:17.5 to obtain The phenolic resin with the shape structure; the phenolic resin obtained after standing still was subjected to solvent replacement in acetone with low surface tension for 5 days, and the water molecules in the network structure were replaced by acetone, and then dried at room temperature for 5 days. The dried airgel was heated up to 950 °C in a tube furnace and kept for 4 h for carbonization to obtain a black carbon aerogel.

[0035] (2) Three-dimensional nano-perovskite composite heterogeneous Fenton catalyst BiFeO 3 / CA preparation process and its characterization, the specific steps are as follows:

[0036] 0.01~0.02molBi(NO 3 ) 3 and 0.01~0.02molFe(NO 3 ) 3 Dissolved in 2mol·L -1 dilu...

Embodiment 2

[0041] A preparation method of a three-dimensional nano-perovskite type composite heterogeneous Fenton catalyst, using carbon airgel as a substrate, and loading nano-scale perovskite-type bismuth-iron oxides by a sol-gel method to obtain a loaded nano-scale perovskite The carbon airgel of bismuth-iron composite is a three-dimensional nano-perovskite composite heterogeneous Fenton catalyst.

[0042] The method includes the following steps:

[0043] (1) Preparation of carbon airgel: put resorcinol, formaldehyde, catalyst and water into an airtight container after mixing evenly, leave to react to obtain phenolic resin, put phenolic resin into organic reagent for solvent replacement, Then the phenolic resin is dried at room temperature, and after drying, it is heated in a tube furnace to carbonize it to obtain a black carbon aerogel;

[0044] (2) Dissolve bismuth nitrate and ferric nitrate in dilute nitric acid solution, and stir magnetically for 30 minutes. After bismuth nitrate...

Embodiment 3

[0053] A preparation method of a three-dimensional nano-perovskite type composite heterogeneous Fenton catalyst, using carbon airgel as a substrate, and loading nano-scale perovskite-type bismuth-iron oxides by a sol-gel method to obtain a loaded nano-scale perovskite The carbon airgel of bismuth-iron composite is a three-dimensional nano-perovskite composite heterogeneous Fenton catalyst.

[0054] The method includes the following steps:

[0055] (1) Preparation of carbon airgel: put resorcinol, formaldehyde, catalyst and water into an airtight container after mixing evenly, leave to react to obtain phenolic resin, put phenolic resin into organic reagent for solvent replacement, Then the phenolic resin is dried at room temperature, and after drying, it is heated in a tube furnace to carbonize it to obtain a black carbon aerogel;

[0056] (2) Dissolve bismuth nitrate and ferric nitrate in dilute nitric acid solution, and stir magnetically for 30 minutes. After bismuth nitrate a...

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Abstract

The invention relates to a preparation method and a use of a three-dimensional nano-perovskite-type composite heterogeneous Fenton catalyst. The three-dimensional nano-perovskite-type composite heterogeneous Fenton catalyst utilizes carbon aerogel as a matrix. Through a sol-gel method, a nano-perovskite-type bismuth-iron oxide is loaded so that nano-perovskite-type bismuth-iron compound-loaded carbon aerogel is obtained. The nano-perovskite-type bismuth-iron compound-loaded carbon aerogel is the three-dimensional nano-perovskite-type composite heterogeneous Fenton catalyst. The three-dimensional nano-perovskite-type composite heterogeneous Fenton catalyst is used for heterogeneous Fenton oxidation degradation of pollutants in waste water. Compared with the existing catalyst, the three-dimensional nano-perovskite-type composite heterogeneous Fenton catalyst has characteristics of carbon aerogel and perovskite-type BiFeO3 in the Fenton reaction and has the advantages of high porosity, large specific surface area, rich space net structures and controllable appearance shape. The preparation method utilizes interaction of carriers and active components to further improve reaction activity and catalyst stability. The three-dimensional nano-perovskite-type composite heterogeneous Fenton catalyst is suitable for removing difficultly-degraded organics in waste water by Fenton catalytic oxidation. The preparation method has simple processes and a low cost, is a high-efficiency energy-saving novel technology and has wide economic and social benefits.

Description

technical field [0001] The invention relates to the preparation and application of a heterogeneous Fenton catalyst in the technical field of water treatment, in particular to a preparation method and application of a three-dimensional nano perovskite type composite heterogeneous Fenton catalyst. Background technique [0002] Organic pollution of the water environment is a major problem in the current water environment, especially the hazards of persistent refractory organic pollutants are more serious. The treatment is difficult, and the research on its treatment technology has always attracted the attention of the environmental protection technology circles at home and abroad. In recent years, the emergence of advanced oxidation technology (Advanced Oxidation Processes referred to as AOP) represented by ozone oxidation, catalytic wet oxidation, electrochemical oxidation, photocatalytic oxidation, sonochemical oxidation, ultrasonic collaborative oxidation, Fenton (Fenton) ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/843C02F1/72
Inventor 赵国华曹金磊赵红颖
Owner TONGJI UNIV
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