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Method for preparing carbon nano-tube modified palladium-loaded electrode through electrophoresis-pulse deposition

A carbon nanotube, pulse deposition technology, applied in electrodes, electrophoretic plating, electrolytic coatings, etc., can solve the problem of high cost, and achieve the effect of improving efficiency, uniform dispersion and good dispersibility

Active Publication Date: 2014-08-27
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a catalyst, palladium (Pd) greatly improves the degradation rate of chlorinated organic compounds, but as a noble metal, the cost is high, so it is a meaningful research to improve the utilization rate of Pd and prepare efficient catalytic electrodes

Method used

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  • Method for preparing carbon nano-tube modified palladium-loaded electrode through electrophoresis-pulse deposition
  • Method for preparing carbon nano-tube modified palladium-loaded electrode through electrophoresis-pulse deposition
  • Method for preparing carbon nano-tube modified palladium-loaded electrode through electrophoresis-pulse deposition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Put CNTs in mixed acid Ultrasonic at medium temperature for 4 hours, reflux at 60°C for 2 hours, filter and wash until neutral, dry and set aside;

[0027] (2) Dip the titanium (Ti) mesh in 40% NaOH solution at 80°C for 2 hours to remove surface oil stains, wash it with distilled water until neutral, then immerse it in 15% oxalic acid solution to remove surface oxides, at 98°C Keep it for 2 hours, rinse it with distilled water, and dry it with nitrogen for later use;

[0028] (3) prepare the Py solution of 0.04mmol / L, wherein the concentration of SLS is 1mmol / L, H 2 SO 4 The concentration is 0.05mol / L. The Ti mesh treated in step (2) is used as the anode, the Pt sheet is used as the cathode, and the Py solution is used as the plating solution. The current is adjusted to 3mA and the time is 5min. The PPy film is deposited on the surface of the Ti mesh by electrochemical method to obtain a PPy / Ti electrode. figure 1 It can be seen that a layer of PPy film is unif...

Embodiment 2

[0034] (1) Put CNTs in mixed acid Ultrasonic at medium temperature for 4 hours, reflux at 60°C for 2 hours, filter and wash until neutral, dry and set aside;

[0035] (2) Dip the titanium (Ti) mesh in 40% NaOH solution at 80°C for 2 hours to remove surface oil stains, wash it with distilled water until neutral, then immerse it in 15% oxalic acid solution to remove surface oxides, at 98°C Keep it for 2 hours, rinse it with distilled water, and dry it with nitrogen for later use;

[0036] (3) prepare the Py solution of 0.04mmol / L, wherein the concentration of SLS is 1mmol / L, H 2 SO 4 The concentration is 0.05mol / L. The Ti mesh treated in step (2) is used as an anode, the Pt sheet is used as a cathode, and the Py solution is used as a plating solution. The current is adjusted to 3mA and the time is 5min. Electrochemical method is used to deposit a PPy film on the surface of the Ti mesh to obtain a PPy / Ti electrode. figure 1 It can be seen that a layer of PPy film is uniforml...

Embodiment 3

[0044] (1) Put CNTs in mixed acid Ultrasonic at medium temperature for 4 hours, reflux at 60°C for 2 hours, filter and wash until neutral, dry and set aside;

[0045] (2) Dip the titanium (Ti) mesh in 40% NaOH solution at 80°C for 2 hours to remove surface oil stains, wash it with distilled water until neutral, then immerse it in 15% oxalic acid solution to remove surface oxides, at 98°C Keep it for 2 hours, rinse it with distilled water, and dry it with nitrogen for later use;

[0046] (3) prepare the Py solution of 0.04mmol / L, wherein the concentration of SLS is 1mmol / L, H 2 SO 4 The concentration is 0.05mol / L. The Ti mesh treated in step (2) is used as an anode, the Pt sheet is used as a cathode, and the Py solution is used as a plating solution. The current is adjusted to 3mA and the time is 5min. Electrochemical method is used to deposit a PPy film on the surface of the Ti mesh to obtain a PPy / Ti electrode. figure 1 It can be seen that a layer of PPy film is uniforml...

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Abstract

The invention discloses a method for preparing a carbon nano-tube modified palladium-loaded electrode through electrophoresis-pulse deposition, belonging to the technical field of electrochemical water treatment. Polypyrrole is used as a cocatalyst, and a carbon nano tube is used as a catalyst carrier, so that the dispersibility of a catalyst is improved, and utilization ratio of the catalyst is increased; a pulse plating process is used as a catalyst deposition technology, and crystals on a plating layer are refined, so that the catalytic performance of the electrode is enhanced. According to the invention, a titanium mesh is used as the substrate, the oxidized carbon nano tube is modified on the surface of the substrate by using an electrophoresis method after a layer of polypyrrole film is polymerized on the surface of the substrate, and then, a layer of uniform carbon nano-tube carrier film is formed. Compared with a Pdped / Ti electrode prepared under the same condition and a Pdded / Ti electrode prepared through direct-current electroplating, a Pd / CNTs / PPy / Ti electrode prepared by depositing a palladium catalyst by using the pulse plating process is higher in catalytic performance.

Description

technical field [0001] The invention belongs to the technical field of electrochemical water treatment, uses titanium mesh as a substrate, electrophoresis deposits and modifies carbon nanotubes, deposits palladium catalysts by pulse electroplating, and prepares Pd / CNTs / PPy / Ti composite electrodes, which can be used for water phase electrodes of chlorinated organics. Catalytic reduction dechlorination. Background technique [0002] Chlorinated organic compounds belong to the category of typical persistent organic pollutants, which are highly toxic and difficult to degrade. Electrocatalytic hydrodechlorination technology is an economical and effective green technology for degrading chlorinated organic compounds, with mild experimental conditions, low operating costs and few toxic by-products. As a catalyst, palladium (Pd) greatly improves the degradation rate of chlorinated organic compounds, but as a noble metal, the cost is high, so it is a meaningful research to improve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/04C25B3/04C25D9/02C25D13/02C25D5/18C25D3/50C25B3/25
Inventor 孙治荣杜冉刘丹
Owner BEIJING UNIV OF TECH
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