Carbon felt-loaded cerium-doped alpha-FeOOH nanosheet array electrode and preparation method and application thereof

A nanosheet array, cerium doping technology, applied in chemical instruments and methods, oxidized water/sewage treatment, special compound water treatment, etc., can solve the problems of low activity, refractory degradation, and small organic removal capacity.

Active Publication Date: 2021-05-18
TONGJI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a carbon felt-supported cerium-doped α-FeOOH nanosheet array electrode and its preparation method and its application in the electric Fenton cathode material with low activity and small removal capacity for refractory organic matter. Application of Fenton water treatment to remove organic pollutants, and in-depth research on its in situ generation of H 2 o 2 , in situ activated H 2 o 2 Bifunctional catalytic activity for producing OH, providing technical reference for electro-Fenton reaction to remove pollutants

Method used

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  • Carbon felt-loaded cerium-doped alpha-FeOOH nanosheet array electrode and preparation method and application thereof
  • Carbon felt-loaded cerium-doped alpha-FeOOH nanosheet array electrode and preparation method and application thereof
  • Carbon felt-loaded cerium-doped alpha-FeOOH nanosheet array electrode and preparation method and application thereof

Examples

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preparation example Construction

[0048] A preparation method of a carbon felt supported cerium-doped α-FeOOH nanosheet array electrode, comprising the following steps:

[0049] 1) Add FeSO to ultrapure water 4 ·7H 2 O and CeCl 3 ·7H 2 O and ultrasonically disperse for 5-15min to form 0-1.92mM Fe 2+ , 0-1.92mM Ce 3+ mixed solution;

[0050] 2) Add glycerin and conductive carbon felt, and conduct a hydrothermal reaction at 100-150°C for 20-28h. After the reaction product is cooled to room temperature, wash it with ethanol and ultrapure water for 3-5 times, and heat it at 60-80°C Drying for 10-15 hours under the hood can obtain a uniformly dispersed nanosheet array electrode.

[0051] Wherein, the volume ratio of glycerol to the mixed solution is 3:(10-15), and the loading amount of the active material containing iron and cerium on the obtained nanosheet array electrode is 1-3 mg, and the loading thickness is 180-200 nm.

[0052] The above-mentioned carbon felt-loaded cerium-doped α-FeOOH nanosheet array ...

Embodiment 1

[0064] (1) a carbon felt supported cerium-doped α-FeOOH nanosheet array electrode (Fe:Ce=6:0), its preparation method may further comprise the steps:

[0065] S1, add FeSO to 130mL ultrapure water 4 ·7H 2 O and ultrasonically dispersed for 10 min to form 1.92 mM Fe 2+ aqueous solution;

[0066] S2, add 30mL of glycerin, mix well, then sonicate for 20min, then transfer to a 250mL reactor, and immerse three pieces of 2cm×2cm CF in it;

[0067] S3, seal the reactor and perform hydrothermal reaction at 120°C for 24h, after cooling to room temperature, take out the modified CF, wash with ethanol and ultrapure water for 3 times, and then dry overnight at 60°C in an oven, that is The above-mentioned carbon felt-supported cerium-doped α-FeOOH nanosheet array electrode (Fe:Ce=6:0) was obtained.

[0068] (2) a carbon felt supported cerium-doped α-FeOOH nanosheet array electrode (Fe:Ce=4:2), its preparation method may further comprise the steps:

[0069] S1, add FeSO to 130mL ultrap...

Embodiment 2

[0086] This example is used to explore the effect of electrode materials with different Fe:Ce ratios on the removal effect of chloramphenicol in simulated wastewater.

[0087] The reactor used is a cylindrical glass reactor with an inner diameter of 80mm and a height of 100mm, and the volume of the electrolyte is 100mL.

[0088] The specific reaction conditions are: use a programmable DC power supply as the current output device, adopt a constant current output mode, and set the reaction current to 30mA; use BDD (2cm×2cm) as the anode, and use the carbon felt CF prepared in Example 1 as the load The cerium-doped α-FeOOH nanosheet array electrode (2cm×2cm) was used as the cathode, and the distance between the two electrodes was adjusted to 1cm; in the aeration system, the aeration rate of high-purity oxygen was controlled at 0.2L min by a flow regulator -1 , and pre-exposed oxygen for 10 minutes before the start of the reaction to make the system reach oxygen saturation; the wh...

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Abstract

The invention relates to a carbon felt-loaded cerium-doped alpha-FeOOH nanosheet array electrode, a preparation method thereof and application of the carbon felt-loaded cerium-doped alpha-FeOOH nanosheet array electrode in electro-Fenton water treatment. The preparation method comprises the following steps: firstly, preparing an aqueous solution containing an iron source and a cerium source; and adding glycerol and a conductive carbon felt, carrying out hydrothermal reaction, and carrying out post-treatment to obtain the nanosheet array electrode. The nanosheet array electrode can be used as a cathode material for removing organic pollutants through electro-Fenton reaction. Compared with the prior art, the cerium-doped alpha-FeOOH nanosheet array loaded carbon felt electrode prepared by the preparation method disclosed by the invention is simple in synthesis method, free of metal dissolution, stable in reutilization performance and high in mineralization rate, and has a wide prospect in industrial wastewater treatment.

Description

technical field [0001] The invention belongs to the technical field of water treatment catalytic materials, and relates to a carbon felt-loaded cerium-doped α-FeOOH nanosheet array electrode, a preparation method thereof, and an application in electro-Fenton water treatment. Background technique [0002] Because water safety is of paramount importance to all living species, the control of water pollutants has a serious impact on global health and economic development. The Fenton reaction is an effective water pollution control strategy, which generates strong oxidizing hydroxyl radicals (OH, E0 = 2.80V / SHE) through nanostructured enzyme mimics, and then oxidizes organic pollutants in water to inorganic states . It is worth noting that the electrolytic Fenton (EF) process can generate hydrogen peroxide (H 2 o 2 ), avoiding the H in the traditional Fenton reaction 2 o 2 Due to the high cost of production, transportation, storage and other problems, it has become a potenti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/72C02F101/34C02F101/36C02F101/38
CPCC02F1/46109C02F1/4672C02F2001/46142C02F2305/026C02F2101/36C02F2101/38C02F2101/345C02F2101/34Y02W10/37
Inventor 毛舜刘莹杨玉霖
Owner TONGJI UNIV
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