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A kind of preparation method of ultra-small ferric oxide densely coated three-dimensional reduced graphene oxide-based Fenton catalyst

A technology of ultra-small ferroferric oxide and graphene, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of weak catalytic active sites, Inhomogeneity and other problems, to achieve the effect of accelerating the interface electron transfer rate, small iron dissolution, and high stability

Active Publication Date: 2022-07-15
HARBIN INST OF TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve existing method loading Fe on graphene 3 o 4 In order to solve the problems of inhomogeneity, instability and few catalytic active sites, a method for preparing a three-dimensional graphene oxide-like Fenton catalyst densely coated with ultra-small iron ferric oxide is provided

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  • A kind of preparation method of ultra-small ferric oxide densely coated three-dimensional reduced graphene oxide-based Fenton catalyst
  • A kind of preparation method of ultra-small ferric oxide densely coated three-dimensional reduced graphene oxide-based Fenton catalyst
  • A kind of preparation method of ultra-small ferric oxide densely coated three-dimensional reduced graphene oxide-based Fenton catalyst

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specific Embodiment approach 1

[0036] Specific embodiment 1: This embodiment is a preparation method of ultra-small ferric oxide densely coated three-dimensional reduced graphene oxide-based Fenton catalyst, which is completed according to the following steps:

[0037] 1. Preparation of graphene oxide dispersion:

[0038] The graphene oxide is added to deionized water, and then ultrasonically treated to obtain a graphene oxide dispersion;

[0039] The concentration of the graphene oxide dispersion described in step 1 is 0.5mg / mL~2mg / mL;

[0040] Second, the FeCl 3·6H 2 O joins in the graphene oxide dispersion liquid, stirs again, obtains solution I;

[0041] FeCl described in step 2 3 ·6H 2 The mass ratio of O to the volume of graphene oxide dispersion is (0.4g~0.8g): 30mL;

[0042] 3. Use NaHCO 3 Adjust the pH value of solution I to 8-12, and then stir to obtain solution I with pH value of 8-12;

[0043] 4. Add the ascorbic acid solution dropwise to the solution I with a pH value of 8 to 12 under s...

specific Embodiment approach 2

[0056] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the power of the ultrasonic treatment in step 1 is 100W-150W, and the ultrasonic treatment time is 1h-3h. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0057] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the stirring time described in step 2 is 20 min to 40 min, and the stirring speed is 800 r / min to 1000 r / min. Other steps are the same as in the first or second embodiment.

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Abstract

A preparation method of ultra-small ferric oxide densely coated three-dimensional reduced graphene oxide-like Fenton catalyst relates to a preparation method of a Fenton-like catalyst. The object of the present invention is to solve the problem of loading Fe on graphene by existing methods 3 O 4 The problems of non-uniformity, instability and few catalytically active sites. Methods: 1. Preparation of graphene oxide dispersion; 2. FeCl 3 ·6H 2 0 is added to the graphene oxide dispersion; 3. pH value is adjusted; 4. ascorbic acid solution is added dropwise; 5. hydrothermal reaction; 6. cleaning, freeze-drying. The ultra-small ferric oxide densely coated three-dimensional reduced graphene oxide-based Fenton catalyst prepared by the invention has significantly improved catalytic performance, degrades tetracycline hydrochloride for 20 minutes, the degradation rate can reach 100%, and has excellent cycle stability. The invention can obtain an ultra-small ferric oxide densely coated three-dimensional reduced graphene oxide type Fenton catalyst.

Description

technical field [0001] The invention relates to a preparation method of a Fenton-like catalyst. Background technique [0002] In recent years, ecological and environmental problems caused by the abuse of antibiotics have attracted widespread attention. Most antibiotics cannot be completely absorbed in human and animal bodies, and are discharged into the water body in the form of prototype or metabolites. Wastewater containing antibiotics will not only cause the imbalance of the microbial population structure in the water body, but also enter the human body through the enrichment of the food chain, making humans resistant to antibiotics, and even causing side effects such as carcinogenicity and teratogenicity. There are many kinds of antibiotics with complex structure and difficult to degrade. Therefore, it is of great social significance to study the treatment technology of wastewater containing antibiotics. [0003] Fenton-like oxidation technology can generate strong ox...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/745B01J35/02C02F1/72C02F101/38C02F103/34
CPCB01J23/745B01J35/008B01J35/023C02F1/725C02F2305/026C02F2305/023C02F2101/38C02F2101/40C02F2103/343
Inventor 姚忠平张笑姜兆华李东琦周扬
Owner HARBIN INST OF TECH
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