Unlock instant, AI-driven research and patent intelligence for your innovation.

Erbium-doped manganese oxide electrocatalytic electrode as well as preparation method and use thereof

A technology of electrocatalysis and manganese oxide, which is applied in chemical instruments and methods, water/sewage treatment equipment, electrochemical water/sewage treatment, etc., can solve the problems of limited electrocatalysis activity, achieve improved electrocatalysis efficiency, easy control, The effect of high degradation efficiency

Active Publication Date: 2018-06-29
江苏易驰新能源集团有限公司
View PDF16 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN106630116A, CN106563504A, CN103613206B, CN102942293A, CN102351312A have all reported the method of cathodic electrochemical reduction of nitrate radical denitrification, but this method is not denitrification by oxidation of ammonia nitrogen
CN103241809A uses neodymium-doped tin oxide graphite electrodes to achieve ammonia nitrogen degradation under high overpotential conditions, but high potential means limited electrocatalytic activity

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
  • Erbium-doped manganese oxide electrocatalytic electrode as well as preparation method and use thereof
  • Erbium-doped manganese oxide electrocatalytic electrode as well as preparation method and use thereof
  • Erbium-doped manganese oxide electrocatalytic electrode as well as preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Treat titanium mesh (purity>99.9%, size: length×width×thickness: 30mm×30mm×1mm, diamond-shaped hole size: 2mm×4mm) with NaOH and oxalic acid in turn, deionized water for 1-2 minutes, Blow dry with nitrogen and store in absolute ethanol for later use;

[0041] (2) Preparation of impregnation solution: take by weighing the manganese nitrate solution with a mass fraction of 50%, and weigh Er(NO 3 ) 3 ·6H 2 O, use dehydrated alcohol as solvent, stirring and mixing;

[0042] (3) Immerse the titanium mesh treated in (1) in the impregnating solution of (2) for a certain period of time, dry it at room temperature, transfer it to an oven and bake it at 105°C for 1-2h, until there is no obvious liquid on the surface of the titanium mesh;

[0043] (4) After repeating step (3) twice, the electrode was transferred to a muffle furnace, kept at 450° C. for 2 hours, and taken out after being cooled to room temperature to obtain an erbium-doped manganese oxide electrocatalytic el...

Embodiment 2

[0047] (1) is basically the same as embodiment 1;

[0048] (2) substantially the same as Example 1, but the Er / Mn mol ratio is 5 / 100;

[0049] (3) substantially the same as Example 1, but the drying temperature is 80°C;

[0050] (4) After repeating step (3) twice, the electrode was transferred to a muffle furnace, kept at 350° C. for 5 hours, and taken out after cooling to room temperature to obtain an erbium-doped manganese oxide electrocatalytic electrode.

[0051] (5) It is basically the same as in Example 1, but the constant voltage is controlled at U=3.0V, the pH value of the adjustment system is 10, and after 10 hours of electrocatalysis, the degradation rate of ammonia nitrogen reaches 91.5%.

Embodiment 3

[0053] (1) is basically the same as embodiment 1;

[0054] (2) substantially the same as Example 1, but the Er / Mn mol ratio is 20 / 100;

[0055] (3) substantially the same as Example 1, but the drying temperature is 135°C;

[0056] (4) After repeating step (3) twice, the electrode was transferred to a muffle furnace, kept at 550° C. for 1 h, and taken out after cooling to room temperature to obtain an erbium-doped manganese oxide electrocatalytic electrode.

[0057] (5) It is basically the same as in Example 1, but the constant voltage control U=3.3V, the pH value of the adjustment system is 9.5, and after 10 hours of electrocatalysis, the degradation rate of ammonia nitrogen reaches 95.2%.

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 an erbium-doped manganese oxide electrocatalytic electrode as well as a preparation method and use thereof. The preparation method comprises the following steps: dipping a pretreated titanium mesh into impregnation liquid containing Er<3+> and Mn<2+>, then taking out the titanium mesh and drying until no obvious liquid exists on the surface of the titanium mesh, and then carrying out heat treatment on the titanium mesh to obtain the erbium-doped manganese oxide electrocatalytic electrode. When the erbium-doped manganese oxide electrocatalytic electrode provided by the invention is used as an anode material for carrying out electrocatalytic denitrification, ammonia nitrogen can be directly oxidized into nitrogen under the driving of direct current, and nitrogen removal is completely realized; the whole process is mild in conditions and does not produce secondary pollution; the erbium-doped manganese oxide electrocatalytic electrode is high in degradation efficiency, low in operating cost and easy to control.

Description

technical field [0001] The invention relates to an electrode material, in particular to an erbium-doped manganese oxide electrocatalytic electrode, its preparation method and application, such as a method for utilizing the electrocatalytic denitrification. Background technique [0002] Excessive ammonia nitrogen in water will reduce the concentration of dissolved oxygen, produce nitrate and nitrite, lead to eutrophication, and in severe cases, algal blooms will explode, which will have adverse effects on aquatic organisms, industrial production and people's lives. According to the petrochemical industry sewage discharge standard (GB31571-2015), the content of ammonia nitrogen (NH3-N) should not exceed 8mg / L. [0003] At present, the methods of denitrification include biological method and physical chemical method. Physical and chemical methods mainly include breakpoint chlorination method, chemical precipitation method, physical stripping method, air stripping method, etc. ...

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): C02F1/461C02F1/46
CPCC02F1/46C02F1/46109C02F2001/46142C02F2101/16C02F2201/46105
Inventor 刘守清张行马楫朱国营沈培新
Owner 江苏易驰新能源集团有限公司