Method for preparing catalyst for electrical catalytic degradation of organic wastewater

A technology for electrocatalytic degradation and organic wastewater, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, electrochemical water/sewage treatment, etc., can solve the problems of reducing catalytic degradation effect, coating peeling off, difficult morphology of anode materials, etc. problem, to achieve the effect of strong controllability and simple operation

Inactive Publication Date: 2016-04-13
YANGZHOU UNIV
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Problems solved by technology

However, the morphology of the anode materials prepared by these methods is difficult to control, and the catalytic effect is not very ideal.
For example, F.Montilla (JournalofPhysicalChemistryB, 108:5036-5043) prepared Ti / SnO by thermal decomposition 2 -Sb electrode, SEM pictures show that there are different degrees of cracking on the surface of the electrode. This structure makes the coating fall off and the substrate is easy to passivate, thereby reducing the effect of catalytic degradation
However, the use of electrospinning technology to prepare one-dimensional metal oxides as electrode catalysts for electrocatalytic degradation of organic wastewater has not been reported so far.

Method used

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  • Method for preparing catalyst for electrical catalytic degradation of organic wastewater
  • Method for preparing catalyst for electrical catalytic degradation of organic wastewater

Examples

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Effect test

example 1

[0022] Example 1: Weigh 2g of polyvinylpyrrolidone (PVP) into a solvent composed of 9g of ethanol and 9g of N-N dimethylformamide (DMF), stir for 12 hours until the solution is clear and transparent, and then weigh 2g of PVP SnCl 4 ·5H 2 O was added to the above solution and stirred until the solution became clear and transparent to obtain the spinning solution.

[0023] Put the spinning solution into a 10mL syringe for spinning and control the spinning conditions. The spinning voltage is 24kv, the temperature is 35°C, the humidity is 30%, the receiving distance is 15cm, and the spinning speed is 0.2mm / min, to obtain SnCl 4 ·5H 2 For composite nanofibers with O / PVP=1, the composite nanofibers are calcined at 500°C for 3 hours at a heating rate of 3°C / min in air to obtain inorganic SnO 2 Nanofibers.

[0024] The metal oxide nanofibers, acetylene black, polytetrafluoroethylene, and ethanol were mixed in a mass ratio of 80:10:5:5, stirred for 24 hours, and ultrasonically trea...

example 2

[0029] Example 2: Similar to the steps in Example 1, weigh 2.5g of polyvinylpyrrolidone (PVP) and add it to 18gN-N dimethylformamide solvent, stir for 12h until the solution is clear and transparent SnCl 4 ·5H 2 O was replaced with 2 g of iron acetylacetonate. Made Fe 2 o 3 With nanofibers, the removal rate of electrocatalytic phenol wastewater was 84.64%, and the removal rate of COD was 66.11%; the removal rate of methylene blue was 89.23%, and the removal rate of COD was 69.43%; The removal rate was 10.11%.

example 3

[0030] Example 3: Similar to the steps in Example 1, weigh 2g of polyvinylpyrrolidone (PVP) and add it to 18g of ethanol solvent, stir for 12h until the solution is clear and transparent, add 2g of SnCl 4 ·5H 2 O was replaced by 2 g of manganese acetate. MnOx nanofibers were prepared, the removal rate of electrocatalytic phenol wastewater was 84.23%, the removal rate of COD was 42.23%; the removal rate of methylene blue was 83.47%, the removal rate of COD was 57.93%; the removal rate of Congo red wastewater was 80.93%, COD removal rate was 7.02%.

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Abstract

The invention discloses a method for preparing a catalyst for electrical catalytic degradation of organic wastewater and relates to the technique for preparing a one-dimensional metallic oxide electrode catalyst for electrical catalytic degradation of organic wastewater. Metal salt, high-molecular polymer and organic solvent are mixed and stirred to form a spinning solution, electrostatic spinning is conducted to generate M / PVP composite fiber yarn, the yarn is subjected to heat treatment in the air to prepare a one-dimensional metallic oxide catalyst, and the prepared catalyst is made into an electrode through tablet pressing to serve as the positive pole for electrical catalysis of organic wastewater. The one-dimensional continuous filament-shaped metallic oxide can be prepared with the electrospinning method to be used as the electrode catalyst, has higher stability and conductivity compared with granules, and has a good catalysis effect in wastewater electro-catalysis as an electrocatalyst electrode.

Description

technical field [0001] The invention belongs to the field of preparation of electrode catalysts, and in particular relates to a preparation method of a one-dimensional metal oxide electrode catalyst used for electrocatalytically degrading organic waste water. technical background [0002] With the rapid development of social economy, it is also accompanied by a series of environmental problems, especially the pollution of water resources directly threatens the survival of human beings. Therefore, the treatment of organic wastewater has gradually attracted people's attention. At present, for the three-stage treatment process of organic wastewater at home and abroad, the designed treatment technologies mainly include physical methods, biological methods, adsorption methods, and chemical oxidation methods. Among them, chemical oxidation mainly includes wet oxidation, wet catalytic oxidation, electrocatalytic oxidation, etc. Electrocatalytic oxidation is a method gradually dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/14B01J23/72B01J23/34B01J23/75B01J35/06C02F1/46C02F101/30
CPCB01J23/14B01J23/34B01J23/72B01J23/75B01J35/06C02F1/46C02F2101/30
Inventor 贾哲华陶翠赵有华贾成浩董斌徐继任
Owner YANGZHOU UNIV
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