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A metal-free heterogeneous Fenton-like catalyst and its preparation method and application

A heterogeneous, Fenton-type technology, applied in the field of water treatment, can solve the problem of high production costs, and achieve the effects of easy recovery and recycling, high utilization rate and good stability

Active Publication Date: 2020-04-14
GUANGZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the actual water treatment process, the large-scale production of catalysts containing a large amount of metal components also makes the production cost high

Method used

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  • A metal-free heterogeneous Fenton-like catalyst and its preparation method and application
  • A metal-free heterogeneous Fenton-like catalyst and its preparation method and application
  • A metal-free heterogeneous Fenton-like catalyst and its preparation method and application

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Embodiment

[0039] The preparation method of metal-free heterogeneous Fenton-type catalyst (POP-rGO Nhs) of the present invention comprises the following steps:

[0040] (1) Slowly add 5.0 g of graphite powder into 115 mL of concentrated sulfuric acid (98%) under an ice bath condition below 0° C., and stir for 30 minutes (at a speed of 400 rpm) to obtain solution A. 25.0g NaNO 3 Add to solution A, stir for 30 minutes (rotating speed is 450 rpm) to obtain solution B. KMnO 4 Slowly added to solution B, stirred for 3 hours (350 rpm) to obtain solution C.

[0041] (2) Heat solution C to 38°C for the first time, stir for 30 minutes (rotation speed: 450 rpm), add 250mL deionized water, heat up to 95°C again, and stir for 1 hour (rotation speed: 450 rpm) , to obtain solution D.

[0042] (3) 50mL H 2 o2 (30%) solution D was added until the solution turned golden brown. After cooling, it was washed three times with 5% HCl and then with deionized water until the pH was close to 6 to obtain th...

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Abstract

The invention discloses a metal-free heterogeneous Fenton-like catalyst, and a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: takingconcentrated sulfuric acid as a solvent, adding graphite powder, NaNO3 and potassium permanganate, performing a heating reaction, then adding H2O2 until the solution changes into a gold brown suspension, and performing washing, drying and grinding to obtain solid powder; and mixing 4-phenoxyphenol and the solid powder F, melting the mixture in ethanol, performing a heating reaction, removing the solvent through evaporation to obtain a solid precursor, and performing a reaction at 350-380 DEG C to obtain solid powder which is the metal-free heterogeneous Fenton-like catalyst. The metal-free heterogeneous Fenton-like catalyst disclosed by the invention is not obviously influenced by the pH value of a reaction system. The harsh condition that the pH value of the system is regulated to 2-3 isnot needed in the reaction process, and a favorable removal effect can be achieved for the degradation of nonbiodegradable toxic / harmful organic pollutants under a neutral condition at room temperature.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a metal-free heterogeneous Fenton-like catalyst and a preparation method and application thereof. Background technique [0002] Complex micro-pollution of water bodies is one of the key environmental problems faced by human beings. In recent years, this problem has been particularly serious due to the continuous release of a large number of toxic and harmful organic pollutants into water bodies. These pollutants include chlorophenols, endocrine disruptors, and pharmaceuticals. Most of them are persistent and refractory to biodegradation, and they often seriously threaten human life and health through accumulation and enrichment. Therefore, it is imminent to develop low-cost, efficient and harmless technologies and methods for removing such pollutants. [0003] The Fenton reaction uses reducing metals to reduce hydrogen peroxide (H 2 o 2 ) to produce hydrox...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02C02F1/72C02F101/30
CPCB01J31/0204C02F1/722C02F1/725C02F2101/30C02F2305/026
Inventor 吕来胡春
Owner GUANGZHOU UNIVERSITY
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