Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Bipolar electrode, preparation method thereof and wastewater treatment system

A bipolar electrode and anode technology, applied in water/sewage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc., can solve redox synergy, insufficient mass transfer efficiency, and dehalogenation of pollutants Problems such as poor degradation effect can be achieved to reduce material impedance and charge transport energy barrier, improve mass transfer efficiency and catalyst activity, and solve the effects of mass transfer limitation and high energy consumption

Active Publication Date: 2021-08-17
XIAN UNIV OF TECH
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a bipolar electrode, which solves the problem of poor dehalogenation and degradation of pollutants due to the redox synergistic effect and insufficient mass transfer efficiency in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Bipolar electrode, preparation method thereof and wastewater treatment system
  • Bipolar electrode, preparation method thereof and wastewater treatment system
  • Bipolar electrode, preparation method thereof and wastewater treatment system

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] A method for preparing a bipolar electrode, comprising: performing weak electro-chemical modification on a ceramic film to obtain a matrix; performing hydrothermal synthesis-hydrophobic treatment on the matrix, embedding GQDs in its skeleton, and forming an intermediate layer on the surface of the matrix; Metal oxides and metals are respectively loaded on both sides of the layer, and an anode catalyst layer and a cathode catalyst layer are formed on both sides of the middle layer.

[0031] Specifically, step 1, first place the ceramic membrane in deionized water to ultrasonically clean it for 5-15 minutes, then keep it in an acidic solution at 98°C for 1-2h, then rinse it with deionized water until it is neutral, and then clean it at 90-105°C Drying under the sun; a titanium oxide layer is formed on the surface of the ceramic membrane by immersion-thermal decomposition method, wherein the composition of the immersion solution includes: tetrabutyl titanate with a volume f...

Embodiment 1

[0038] Step 1. Select Al with a diameter of 3cm, a thickness of 2.5mm, and an average pore diameter of 3μm 2 o 3 For the ceramic membrane, first place the ceramic membrane in deionized water and ultrasonically clean it for 15 minutes, then keep it in an acidic solution with a pH of 2 at 98°C for 2h, then rinse it with deionized water until neutral, and then dry it at 105°C. A titanium oxide layer is formed on the surface of the ceramic membrane by immersion-thermal decomposition method, wherein the immersion liquid composition includes: 80% tetrabutyl titanate by volume fraction, 20% ethanol by volume fraction and 0.1mol / L HNO 3 , the immersion time is 5min, and after taking it out, it is dried at a temperature of 105°C. After repeating immersion-drying 3 times, it is calcined at a calcination temperature of 500°C for 15min. The ceramic membrane loaded with titanium oxide is used as the cathode, and the graphite is used as the anode, and the 10mA / cm 2 Electrochemical reducti...

Embodiment 2

[0042] Sb-SnO 2 @Al 2 o 3 / GQDs@Pd-Fe bipolar electrode is the core, and the three typical halogenated pollutants simulated wastewater of perfluorooctanoic acid, m-chlorophenol and tetrabromobisphenol A are treated to evaluate their dehalogenation degradation effect. The specific processing method is as follows:

[0043] (1) Sb-SnO 2 @Al 2 o 3 / GQDs@Pd-Fe bipolar electrode 1 is installed in the electrolytic component 1, and the structure is as follows figure 2 The flow-through electrocatalytic wastewater treatment system shown;

[0044] (2) Prepare 1mg / L perfluorooctanoic acid solution, m-chlorophenol solution and tetrabromobisphenol solution respectively, with deionized water and 5mmol / L Na 2 SO 4 as solvent and supporting electrolyte respectively;

[0045] (3) Set the power supply 5 to output continuous DC power supply mode, the applied voltage is 3.0V, the set flow rate of the water pump is 5mL / min, the waste water in the waste water pool 3 enters the electrolysis...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a bipolar electrode, a preparation method thereof and a wastewater treatment system. The bipolar electrode comprises a substrate, an intermediate layer is loaded on the surface of the substrate, and an anode catalyst layer and a cathode catalyst layer are loaded on the two sides of the intermediate layer respectively. The preparation method comprises the following steps: modifying a ceramic membrane to obtain a weakly conductive substrate; carrying out hydrothermal synthesis-hydrophobization treatment on the matrix, embedding GQDs into a skeleton of the matrix, and forming a hydrophobic intermediate layer on the surface of the matrix; and respectively loading metal oxide and metal on two sides of the middle layer to respectively form an anode catalyst layer and a cathode catalyst layer. High-efficiency and low-consumption purification and effective detoxification of low-salt-content halogenated pollutant wastewater can be realized.

Description

technical field [0001] The invention belongs to the technical field of refractory organic wastewater treatment, and relates to a bipolar electrode, a preparation method of the bipolar electrode, and a wastewater treatment system using the bipolar electrode. Background technique [0002] As an important organic compound, halogenated pollutants (HOPs) are widely used in agriculture, medical treatment, chemical industry and other fields. Due to the existence of carbon-halogen bonds, this kind of substances has the characteristics of strong persistence, wide accumulation range and high biological toxicity. Their large-scale use and discharge bring potential threats to the water environment and human health. However, traditional processes (including filtration, coagulation, microbial metabolism, etc.) have poor dehalogenation and degradation effects or cannot fundamentally eliminate HOPs. With the widespread and continuous use of HOPs, how to develop efficient dehalogenation deg...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/72C02F101/36
CPCC02F1/46109C02F1/4672C02F2001/46142C02F2101/36
Inventor 李晓良郑兴张耀中王一帆
Owner XIAN UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com