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Pd/TiO2atCNT catalyst and preparation method thereof

A technology of catalyst and catalytic activity, which is applied in the field of Pd/TiO2CNT catalyst and its preparation, can solve the problems of low electrical conductivity and insignificant improvement of catalyst performance, and achieve the effects of improving electrocatalytic activity, enhancing corrosion resistance, and reducing degradation ability

Inactive Publication Date: 2013-11-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since titanium dioxide is a semiconductor material, its conductivity is generally low, and simply mixing or doping titanium dioxide nanomaterials into the catalyst does not significantly improve the performance of the catalyst.

Method used

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  • Pd/TiO2atCNT catalyst and preparation method thereof
  • Pd/TiO2atCNT catalyst and preparation method thereof
  • Pd/TiO2atCNT catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) Place the carbon nanotubes in a mixed acid of concentrated sulfuric acid and concentrated nitric acid (the volume ratio of concentrated sulfuric acid and concentrated nitric acid is 3:1), and conduct an ultrasonic reaction at a constant temperature of 80 °C for 8 h, wash and filter with deionized water, until the pH of the filtrate is reached It is neutral and dried at low temperature to obtain functionalized carbon nanotube materials;

[0023] 2) Put the titanium dioxide powder in a muffle furnace, calcined at 500 °C, after cooling, disperse in 0.2 M nitric acid solution, react for 3 h under stirring conditions, wash and filter with deionized water, until the pH value of the filtrate Be neutral, dry at 60 ° C, obtain the titanium dioxide material after modification;

[0024] 3) Disperse the titanium dioxide powder obtained in step 2) in deionized water, stir rapidly for 10 min, then add the carbon nanotube material obtained in step 1), continue stirring for 20 min, ...

example example 2

[0028] 1) Place the carbon nanotubes in a mixed acid of concentrated sulfuric acid and concentrated nitric acid, react with ultrasonic at a constant temperature of 90 °C for 7 h, wash and filter with deionized water until the pH of the filtrate is neutral, and dry at low temperature to obtain functionalized carbon nanotubes tube material;

[0029] 2) Put the titanium dioxide powder in a muffle furnace, calcined at 600 °C, after cooling, disperse in 0.4 M nitric acid solution, react for 2 h under stirring conditions, wash and filter with deionized water, until the pH value of the filtrate Be neutral, dry at 70 ° C to obtain the modified titanium dioxide material;

[0030] 3) Disperse the titanium dioxide powder obtained in step 2) in deionized water, stir rapidly for 13 minutes, then add the carbon nanotube material obtained in step 1), continue stirring for 25 minutes, then slowly add 18 ml of isopropanol, continue Stir for 30 min, then add 6 ml of ethylene glycol, continue t...

example example 3

[0034]1) Put the carbon nanotubes in the mixed acid of concentrated sulfuric acid and concentrated nitric acid (the volume ratio of concentrated sulfuric acid and concentrated nitric acid is 3:1), 100 °C constant temperature ultrasonic reaction for 8 h, wash and filter with deionized water, until the pH value of the filtrate It is neutral and dried at low temperature to obtain functionalized carbon nanotube materials;

[0035] 2) Put titanium dioxide powder in a muffle furnace, calcined at 600 °C, after cooling, disperse in 0.6 M nitric acid solution, react for 1 h under stirring conditions, wash and filter with deionized water, until the pH value of the filtrate Be neutral, dry at 80 ° C, obtain the titanium dioxide material after the modification;

[0036] 3) Disperse the titanium dioxide powder obtained in step 2) in deionized water, stir rapidly for 15 minutes, then add the carbon nanotube material obtained in step 1), continue stirring for 30 minutes, then slowly add 25 m...

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Abstract

The present invention discloses a Pd / TiO2atCNT catalyst and a preparation method thereof. According to the catalyst, Pd nanoparticles are adopted as a component having catalytic activity, and a TiO2atCNT composite material is adopted as a carrier. The preparation method comprises the following steps: respectively carrying out a pretreatment on titanium dioxide and carbon nanotubes; adopting the pretreated titanium dioxide and the pretreated carbon nanotubes as raw materials; adopting a chemical method to carry out synthesis to obtain a TiO2atCNT composite material; dispersing the TiO2atCNT composite material in an aqueous solution of PdCl2; and adding a reducing agent sodium borohydride to uniformly load palladium nanoparticles on the TiO2atCNT composite carrier. The Pd / TiO2atCNT catalyst prepared by the method of the present invention has high and stable electrochemical oxidation reduction activity.

Description

technical field [0001] The invention belongs to the field of inorganic materials, and specifically relates to a catalytic material and a preparation method thereof, in particular to a Pd / TiO2CNT catalyst with high electrochemical reduction characteristics and a preparation method thereof. Background technique [0002] In recent years, research on preparing catalytic materials with high electrochemical activity and stability, and applying the prepared materials to electrochemical detection, fuel cells, and redox of pollutants has been favored by experts in the fields of materials and electrochemistry. . In particular, the preparation of excellent electrocatalytic materials is one of the focuses of research. Palladium nanomaterials have good electrocatalytic activity, but pure palladium nanomaterials are prone to agglomeration, which severely limits the catalytic ability of the material. In order to improve the electrocatalytic activity and utilization of noble metal palladi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/44
Inventor 李琴周丹丹潘林娜崔皓安浩翟建平
Owner NANJING UNIV
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