Preparation method and application of a municipal sludge-derived carbon material electrode doped with iron and nitrogen species
A carbon material electrode, municipal sludge technology, applied in electro-Peroxone reaction degradation of toxic organic pollutants, preparation of nitrogen species carbon material electrode, municipal sludge derived from doped iron field, can solve the electro-Peroxone reaction catalytic activity Insufficient and other problems, to achieve the effect of excellent catalytic degradation activity, low cost and low dosage
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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 (sludge is taken from the dewatered sludge cake storage workshop of Wuhan Hannan District Sewage Treatment Plant, and the treatment process of Hannan Sewage 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, pH 6.5-7), put the municipal sludge block on a tray and grind it. Put the tray containing the crushed sludge into an oven, and dry it for 12h at 115°C. After drying, take out the tray and collect the dried sludge. Use an agate mill to grind the sludge into powder, pass through a 100-mesh sieve, and put it into an airtight container for later use;
[0059] (2) Preparation of pyrolytic carbon mate...
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 It is a flow chart of preparing a kind of municipal sludge derived from doped iron, nitrogen species carbon material electrode in Example 1, figure 2 A kind of municipal sludge prepared by step (2) of Example 1 is derived from the BET isotherm adsorption and desorption curve of the carbon material doped with iron and nitrogen species, image 3 For a municipal sludge prepared in step (2) of Example 1, the mesopore (a) and micropore (b) pore size distribution diagrams derived from doped iron and nitrogen species carbon materials, from image 3 From the perspective of municipal sludge, carbon materials derived from doped iron and nitrogen species have a certain microporous and mesoporous structure, and the change of this pore structure is due to the activation process of molten salt.
[0068] When x in the pyrolytic carbo...
Embodiment 3
[0072] Example 3: Test of Electroreduction Hydrogen Peroxide Capability of Municipal Sludge Derived from Carbon Materials Doped with Iron and Nitrogen Species
[0073] 1. Preparation of Electrodes
[0074] The electrode sheet obtained in Example 1 was used as the cathode, the platinum sheet electrode of 1 cm*1 cm was used as the anode, and the calomel electrode (Shanghai Russell Technology Co., Ltd., type 217) was used as the reference electrode. The platinum electrode is combined with the municipal sludge derived from the doped iron and nitrogen species carbon material cathode, and the side containing the municipal sludge derived from the doped iron and nitrogen species carbon material is opposite to the platinum electrode.
[0075] 2. Preparation of titanium reagents
[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 [K 2 TiO(C ...
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