Preparation method and application of nano coated electrode

A nano-coating and electrode technology, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as limited production and use, and achieve convenient operation, simple process, and easy Processing effect

Inactive Publication Date: 2012-09-12
BEIJING NORMAL UNIVERSITY
View PDF7 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In May 2009, PFOS and its base salts, together with its precursor perfluorooctyl fluoride, were officially added to the restricted category of Annex B of the Stockholm Convention, aiming to limit production and use worldwide
[0006] So far, there is no report on the high-efficiency mineralization and purification technology of perfluorooctane sulfonate in water by electrochemistry

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
  • Preparation method and application of nano coated electrode
  • Preparation method and application of nano coated electrode
  • Preparation method and application of nano coated electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0020] A method for electrochemically oxidizing and efficiently mineralizing perfluorooctane sulfonic acid in water according to the present invention, and its preferred specific implementation method includes steps:

[0021] Nano-coated Ti / SnO 2 -Sb electrode preparation:

[0022] ① First, polish the Ti substrate with 300-mesh sandpaper, then immerse in 5% sodium hydroxide solution at 100°C for 1-2 hours, take it out and wash it with distilled water, and then etch it in 10% oxalic acid solution at 100°C for 2-3 hours;

[0023] ② Dissolve a certain amount of citric acid in ethylene glycol at 60°C, keep the temperature constant for 30-60 minutes after complete dissolution, then heat to 90°C, add SnCl 4 ·5H 2 O, SbCl 3 and CeCl 4 , stir well until the dissolution is complete, then raise the temperature to 100°C and keep the temperature const...

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 preparation method of a nano coated Ti/SnO2-Sn-Ce electrode and a process and a method for utilizing the same for degradation of perfluorooctane sulfonate in water, and belongs to the technical field of electrochemistry. Perfluorooctane-sulfonate-containing waste water is subjected to electrolytic oxidation by utilizing the nano coated Ti/SnO2-Sn-Ce electrode as an anode and Ti or 304 stainless steel as a cathode. The preparation method is characterized in that perfluorooctane sulfonate can be subjected to fast degradation under mild conditions. By means of electrochemical oxidation, the preparation method is simple in process procedures, convenient to operate, mild in reaction conditions, excellent, stable and reliable in treatment effect and easy to realize industrial application. The nano coated Ti/SnO2-Sn-Ce electrode has the advantages of high oxidation performance, long service life, easiness in processing, low cost and the like.

Description

technical field [0001] The invention relates to a nano-coated Ti / SnO 2 - The process of degrading perfluorooctane sulfonic acid by Sb-Ce electrode is used to eliminate perfluorooctane sulfonic acid in wastewater, and belongs to the field of electrochemistry and environmental protection technology. Background technique [0002] Perfluorooctane sulfonate (PFOS, C 8 f 17 SO 3 H) It has been produced and used for more than fifty years as a surfactant, antifouling agent, additive, foam fire extinguishing agent, polymer emulsifier and insecticide. Since the C-F bond in PFOS has high bond energy (116Kcal / mol), high reduction potential (E 0 =3.6V) and weak polarity PFOS has strong stability. Perfluorooctane sulfonic acid is one of the main destinations of perfluorinated compounds (PFCs) in the environment. Its stable chemical properties, non-volatile and non-degradable characteristics make it widely present in natural water bodies, sediments, animals, etc. As well as the hum...

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): C02F1/461C02F1/72
Inventor 牛军峰林辉
Owner BEIJING NORMAL UNIVERSITY
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