Carbon nano tube film load cuprum and palladium bimetallic catalyst, preparation method and application

A technology of bimetallic catalyst and carbon nanotube film, which is applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of high cost and time-consuming, and achieve good mechanical properties, Good electrical performance and the effect of improving electrochemical activity

Inactive Publication Date: 2013-08-21
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, some researchers have tried to use carbon nanotubes as the carrier of CuPd bimetallic catalysts and apply them to the reduction of nitrate in water; but they generally use impregnation-drying-H 2 Restoring this traditional chemical preparation process is time-consuming and costly

Method used

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  • Carbon nano tube film load cuprum and palladium bimetallic catalyst, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Take 0.2 g of carbon nanotubes and place them in a mixed concentrated acid with the ratio of concentrated sulfuric acid and concentrated nitric acid at a ratio of 3:1, ultrasonicate at a constant temperature of 60 °C for 8 h, wash and filter with deionized water until the pH value of the filtrate is neutral, and dry at low temperature. Obtain functional grouped carbon nanotube materials; ultrasonically disperse in deionized water, and obtain 100 mL of carbon nanotube suspension at constant volume, the concentration of carbon nanotubes in the suspension is about 2 mg / L;

[0022] 2) The titanium plate was polished until the surface showed a uniform light gray luster; the polished titanium plate was washed with 50 wt% NaOH alkali at 70 °C for 1 h to remove the surface oil; the alkali-washed titanium plate was used at 80 °C Pickling with 20 wt% oxalic acid for 2 h to remove surface TiO 2 ;

[0023] 3) The titanium plate pretreated in step 2) was used as the anode, the P...

Embodiment 2

[0027] 1) Take 0.2 g of carbon nanotubes and place them in a mixed concentrated acid with the ratio of concentrated sulfuric acid and concentrated nitric acid at a ratio of 3:1, ultrasonicate at a constant temperature of 70 °C for 6 h, wash and filter with deionized water until the pH value of the filtrate is neutral, and dry at low temperature. Obtain functional grouped carbon nanotube materials; ultrasonically disperse in deionized water, and obtain 100 mL of carbon nanotube suspension at constant volume, the concentration of carbon nanotubes in the suspension is about 2 mg / L;

[0028] 2) The titanium plate was polished until the surface showed a uniform light gray luster; the polished titanium plate was washed with 30 wt% NaOH alkali at 90 °C for 2 h to remove surface oil; the titanium plate after alkali washing was used at 95 °C Pickling with 10 wt% oxalic acid for 4 h to remove surface TiO 2 ;

[0029] 3) The titanium plate pretreated in step 2) was used as the anode, th...

Embodiment 3

[0033] 1) Take 0.2 g of carbon nanotubes and place them in a mixed concentrated acid with the ratio of concentrated sulfuric acid and concentrated nitric acid at a ratio of 3:1, ultrasonicate at a constant temperature of 65 °C for 7 h, wash and filter with deionized water until the pH value of the filtrate is neutral, and dry at low temperature. Obtain functional grouped carbon nanotube materials; ultrasonically disperse in deionized water, and obtain 100 mL of carbon nanotube suspension at constant volume, the concentration of carbon nanotubes in the suspension is about 2 mg / L;

[0034] 2) The titanium plate was polished until the surface showed a uniform light gray luster; the polished titanium plate was washed with 40 wt% NaOH alkali at 80 °C for 1.5 h to remove surface oil; the titanium plate after alkali washing was used at 90 °C Pickling with 15 wt% oxalic acid for 3 h to remove surface TiO 2 ;

[0035] 3) The titanium plate pretreated in step 2) was used as the anode, ...

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Abstract

The invention discloses a carbon nano tube film load cuprum and palladium bimetallic catalyst, a preparation method and an application. The catalyst takes cuprum and palladium as catalytic activity ingredients, and carbon nano tube film modified titanium plate as a substrate. The preparation method comprises the steps of pretreating the titanium plate and a carbon nano tube respectively, taking the treated titanium plate as an anode, taking a dispersed carbon nano tube suspension as deposition liquid, depositing the carbon nano tube on the titanium plate uniformly by the electrophoresis action to form a dense carbon nano tube film, taking the dried carbon nano tube film modified titanium plate as the substrate, placing the substrate in a sodium chloride electroplating solution containing cupric ions, palladium ions and polyvinylpyrrolidone, synchronously depositing the cuprum and the palladium by an electrochemical reduction method, and obtaining the titanium-based carbon nano tube film load cuprum and palladium bimetallic catalyst. The catalyst has high and stable electrochemical activity and electro-catalytic properties, and can serve as a working electrode to degrade organic dye in a water body and reduce inorganic negative ions such as nitrate, bromate and chromate.

Description

[0001] technical field [0002] The invention belongs to the technical field of inorganic materials and nanometer materials, and specifically relates to a carbon nanotube membrane-loaded copper-palladium bimetallic catalyst with high electrochemical reduction characteristics, a preparation method and an application. Background technique [0003] Bimetallic catalysts composed of mint metals (Cu, Ag, Au) and platinum group metals (Pt, Pd, Ir, Rh, Ru) are widely used in the field of electrochemistry, especially in the field of electrochemical reduction, due to their excellent electrochemical properties. has been extensively studied. Among them, CuPd bimetallic electrode has attracted many researchers because of its high catalytic activity and strong catalytic selectivity. As a one-dimensional nanomaterial with light weight, large specific surface area, and excellent mechanical and electrochemical properties, carbon nanotubes are very suitable as catalyst support materials. At...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C02F1/461
Inventor 李琴丁亮张秋崔皓翟建平
Owner NANJING UNIV
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