Composite cathode and preparation method thereof as well as application of composite cathode in biological electro-Fenton method

A composite cathode and mixed salt technology, which is applied in chemical instruments and methods, special compound water treatment, biological water/sewage treatment, etc., can solve the problems of rare catalysts, achieve excellent catalyst performance, wide pH adaptability, and process simple effect

Inactive Publication Date: 2019-01-08
NANJING UNIV OF TECH
View PDF2 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current research has only developed the doping of a single transition metal, and there are few reports on the preparation of catalysts doped with two transition metals.

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
  • Composite cathode and preparation method thereof as well as application of composite cathode in biological electro-Fenton method
  • Composite cathode and preparation method thereof as well as application of composite cathode in biological electro-Fenton method
  • Composite cathode and preparation method thereof as well as application of composite cathode in biological electro-Fenton method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Soak the carbon felt in concentrated nitric acid solution, oxidize at a constant temperature of 100°C for 2 hours, then rinse with water until the pH of the cleaning solution is neutral, and dry to constant weight.

[0035] Then dissolve 0.75 mmoL ferric chloride hexahydrate, 0.25 mmoL manganese sulfate monohydrate and 0.25 mmoL hexahydrate and cobalt chloride in 100 ml distilled water, stir to dissolve. The clean carbon felt modified by surface oxidation was immersed in the mixed salt solution of iron, manganese and cobalt, and ultrasonicated for 1 h.

[0036] 2) Slowly add 15mg / mL sodium borohydride aqueous solution dropwise at a rate of 0.5mL / s. While adding the reducing agent, shake the solution at a speed of 300rpm / min.

[0037] 3) The electrodes were left to stand, rinsed with water, and then dried in a vacuum oven at 50°C for 12 hours.

[0038] figure 1 For the SEM figure of the composite electrode that this embodiment 1 makes, by figure 1 It can be seen th...

Embodiment 2

[0040] 1) Soak the carbon felt in a concentrated nitric acid solution, oxidize it at a constant temperature of 80°C for 3 hours, then wash it with water until the pH of the cleaning solution is neutral, and dry it to a constant weight.

[0041] Then, dissolve 5mmoL ferric chloride hexahydrate, 2.5mmoL manganese sulfate monohydrate and 2.5mmoL cobalt chloride hexahydrate in 100ml distilled water, and stir to dissolve. The clean carbon felt modified by surface oxidation was immersed in the mixed salt solution of iron, manganese and cobalt, and ultrasonicated for 1 h.

[0042] 2) Slowly add 10mg / mL potassium borohydride aqueous solution dropwise at a rate of 0.1mL / s. While adding the reducing agent, shake the solution at a speed of 200rpm / min.

[0043] 3) The electrodes were left to stand, rinsed with water, and then dried in a vacuum oven at 40°C for 10 hours.

Embodiment 3

[0045] 1) Soak the carbon felt in a concentrated nitric acid solution, oxidize it at a constant temperature of 90°C for 1 hour, then wash it with water until the pH of the cleaning solution is neutral, and dry it to a constant weight.

[0046] Then 2.5mmol of ferric chloride hexahydrate, 2.5mmol of manganese chloride tetrahydrate and 2.5mmol of cobalt chloride hexahydrate were dissolved in 100mL of distilled water, and stirred to dissolve. The clean carbon felt modified by surface oxidation was immersed in the mixed salt solution of iron, manganese and cobalt, and ultrasonicated for 1 h.

[0047] 2) Slowly add 20 mg / mL hydrazine hydrate aqueous solution dropwise at a rate of 1 mL / s, and shake the solution at a speed of 250 rpm / min while adding the reducing agent.

[0048] 3) The electrodes were left to stand, rinsed with water, and then dried in a vacuum oven at 80°C for 5 hours.

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

No PUM Login to view more

Abstract

The invention discloses a composite cathode and a preparation method thereof as well as application of the composite cathode in a biological electro-Fenton method, and belongs to the fields of preparation of environmental electrochemical materials and wastewater treatment by an advanced oxidation technology. The method comprises the following steps: soaking a clean carbon felt subjected to surfaceoxidation modification into a mixed salt solution of iron, manganese and cobalt; then adding a reducing agent and reducing the surface of the carbon felt to obtain nanoparticles, namely the compositecathode; the molar ratio of the iron to the manganese to the cobalt in the mixed salt solution is (1-4):1:1. The preparation method disclosed by the invention is simple; the obtained electrode has good recycling performance; the constructed bio-electric Fenton system has wide pH adaptation range and can significantly improve the degradation rate of syringic acid.

Description

technical field [0001] The invention belongs to the technical field of preparation of environmental electrochemical materials and wastewater treatment by advanced oxidation technology, and specifically relates to a microbial electro-Fenton composite cathode, a preparation method thereof and its application in degrading syringic acid by a bio-electric Fenton method. Background technique [0002] Lignocellulose is the most abundant biological resource on earth, so its efficient utilization will have a profound impact on the future energy structure. However, a large amount of phenolic substances are produced during the pretreatment of lignocellulose, and syringic acid is one of the refractory substances widely present. [0003] Bioelectric Fenton is a system that combines the power generation characteristics of biofuel cells and the strong oxidation performance of Fenton reagents, which can degrade many pollutants in water bodies. Iron-based catalysts are common Fenton catalys...

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): C02F3/00
CPCC02F3/005C02F2305/026
Inventor 雍晓雨李彪周俊贾红华吴夏芫谢欣欣仉丽娟
Owner NANJING UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap