Preparation method and application of municipal sludge derived self-doped iron and nitrogen species carbon material electrode

A carbon material electrode and municipal sludge technology, applied in the electro-Peroxone reaction to degrade toxic organic pollutants, the preparation of nitrogen species carbon material electrodes, municipal sludge derived from the field of doped iron, can solve the electro-Peroxone reaction catalytic activity Insufficient and other problems, to achieve the effect of excellent catalytic degradation activity, simple preparation method and low cost

Active Publication Date: 2020-09-11
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Based on the successful preparation of water peanut-derived nitrogen self-doping materials by our research group, there is a defect of insufficient catalytic activity for the electro-Peroxone reaction in practical applications

Method used

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  • Preparation method and application of municipal sludge derived self-doped iron and nitrogen species carbon material electrode
  • Preparation method and application of municipal sludge derived self-doped iron and nitrogen species carbon material electrode
  • Preparation method and application of municipal sludge derived self-doped iron and nitrogen species carbon material electrode

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Embodiment 1: a kind of municipal sludge is derived from the preparation method of doped iron, nitrogen species carbon material electrode

[0056] The steps are as follows:

[0057] (1) Preparation of municipal sludge carbon source:

[0058] Take a certain quality of municipal dry sludge (the sludge is taken from the dewatered sludge cake storage workshop of Wuhan Hannan District Wastewater Treatment Plant, and the treatment process of Hannan Wastewater Treatment Plant is A 2 O and oxidation ditch, sludge composition: organic matter 350-550g / kg, total nitrogen 20-35g / kg, total phosphorus 3-6g / kg, pH6.5-7), put the municipal sludge block on a tray to crush. Put the tray containing the crushed sludge into the oven, and dry it for 12 hours at 115°C. After drying, take out the tray and collect the dried sludge. Use agate mortar to grind the sludge into powder, pass through a 100-mesh sieve, and put it into a closed container for subsequent use;

[0059] (2) Preparation ...

Embodiment 2

[0066] Example 2: Pore volume and pore size analysis of municipal sludge derived from carbon materials doped with iron and nitrogen species

[0067] figure 1 For preparing a kind of municipal sludge in embodiment 1, derive from the flow diagram of doping iron, nitrogen species carbon material electrode, figure 2 A kind of municipal sludge prepared for embodiment 1 step (2) is derived from the BET isotherm adsorption-desorption curve of doped iron, nitrogen species carbon material, image 3 A kind of municipal sludge prepared for embodiment 1 step (2) is derived from the mesoporous (a), micropore (b) pore size distribution figure of doped iron, nitrogen species carbon material, from image 3 It can be seen that the carbon material derived from municipal sludge doped with iron and nitrogen species has a certain microporous and mesopore structure, and the change of this pore structure benefits from the molten salt activation process.

[0068] When x in the pyrolytic carbon mat...

Embodiment 3

[0072] Embodiment 3: municipal sludge is derived from the electroreduction hydrogen peroxide ability test of doped iron, nitrogen species carbon material

[0073] 1. Electrode Preparation

[0074] Get the electrode sheet gained in embodiment 1 as cathode, the platinum sheet electrode of 1cm*1cm is as anode, and calomel electrode (Shanghai Russell Technology Co., Ltd., 217 type) is reference electrode. A platinum electrode is combined with a cathode of a carbon material derived from municipal sludge doped with iron and nitrogen species, with the side containing the carbon material derived from municipal sludge doped with iron and nitrogen species facing the platinum electrode.

[0075] 2. Preparation of titanium reagent

[0076] Take 68mL of 98wt% concentrated sulfuric acid and pour it into 100mL of distilled water. After the solution is cooled to room temperature, add 8.85g of potassium titanium oxalate dihydrate [K2 TiO(C 2 o 4 ) 2 2H 2 O], finally transferred to a 250mL...

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Abstract

The invention relates to the technical field of preparation and application of carbon materials, in particular to a preparation method of a municipal sludge derived self-doped iron and nitrogen species carbon material electrode and application of the municipal sludge derived self-doped iron and nitrogen species carbon material electrode as a cathode material to electro-Peroxone reaction to degradetoxic organic pollutants. Municipal sludge serves as a carbon material precursor, after one-step pyrolysis, an obtained carbon material is washed, filtered and dried, the carbon material, acetylene black powder and polytetrafluoroethylene dispersion liquid are mixed and dissolved in an ethanol solvent according to a certain proportion, ultrasonic treatment, stirring, drying and pressing are carried out to form a film, a titanium mesh serves as a carrier for compounding, and the electrode is prepared. The material is self-doped with iron and nitrogen species, iron and nitrogen sources do not need to be additionally added, the preparation method is simple, the cost is relatively low, and the obtained product is more environmentally friendly. And when being used as a cathode material in degradation of toxic organic pollutants by an electric-Peroxone reaction, the composite material shows excellent catalytic degradation activity and degradation rate, and the efficiency of the composite material is far higher than that of a common carbon-based material.

Description

technical field [0001] The present invention relates to the technical field of preparation and application of carbon materials, in particular to a preparation method of municipal sludge derived from carbon material electrodes doped with iron and nitrogen species and its application as a cathode material in the electro-Peroxone reaction to degrade toxic organic pollutants. Background technique [0002] Municipal sludge is a kind of mixed-phase solid waste mixed with ash, organic matter and microorganisms obtained after municipal sewage is biologically treated in a sewage treatment plant. How to make municipal sludge realize efficient resource utilization and reduce The cost of sludge treatment has always been a concern of people. GEP Research released the "Global and China Sludge Treatment and Disposal Industry Development Research Report (2018)". The report shows that from 2017 to 2018, the world's major economies produced sludge: about 38 million tons in the United States,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F101/30C02F101/34C02F101/36C02F101/38
CPCC02F1/4672C02F1/46109C02F2001/46133C02F2101/36C02F2101/38C02F2101/345C02F2101/30Y02E60/50
Inventor 孙杰陈磊胡晶晶汤迪勇
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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