Preparation and application of carbon nanotube membrane electrode cnt-ti electrode as catalyst carrier

A carbon nanotube film, catalyst carrier technology, applied in electrolytic coatings, electrochemical water/sewage treatment, coatings, etc., can solve the problems of CNTs layer damage, difficult separation operation, unfavorable practical application, etc., and achieve good film forming effect. , the effect of large specific surface area and optimal performance

Active Publication Date: 2016-06-15
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Pd / CNTs powder material is a nano-material, which is applied in the water phase, and the subsequent separation operation is very difficult, which is not conducive to practical application
Prepare CNTs directly on the substrate, and the obtained CNTs contain many catalyst particles and amorphous carbon, which is difficult to purify, easy to cause damage to the prepared CNTs layer, and the process is complicated

Method used

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  • Preparation and application of carbon nanotube membrane electrode cnt-ti electrode as catalyst carrier
  • Preparation and application of carbon nanotube membrane electrode cnt-ti electrode as catalyst carrier
  • Preparation and application of carbon nanotube membrane electrode cnt-ti electrode as catalyst carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Weigh 800mg of CNTs, add 25mL of concentrated nitric acid and 75mL of concentrated sulfuric acid After using an ultrasonic cleaner at room temperature for 8 hours, centrifuge to remove most of the acid, filter and wash the CNTs with deionized water until neutral, and dry them for later use;

[0030] 2. Weigh 10 mg of CNTs prepared in step 1, add 20 mL of deionized water, and ultrasonically disperse for 0.5 h to prepare a 0.5 mg / mL CNTs dispersion. Adjust the pH value to 6 with 0.05mol / L NaOH solution, and place it for later use.

[0031] 3. Cut the 150-mesh Ti net into a size of 2cm×2cm, soak it in 40% NaOH solution at 80°C for 2 hours to remove surface oil, wash it with distilled water until it is neutral, then soak it in 15% oxalic acid solution to remove the surface Oxides, kept at 98°C for 2 hours, rinsed with distilled water, and dried with nitrogen for later use;

[0032] 4. Use the CNTs dispersion liquid configured in step 2 as the electrophoretic depositio...

Embodiment 2

[0035] 1. Weigh 800mg of CNTs, add 25mL of concentrated nitric acid and 75mL of concentrated sulfuric acid After refluxing at 60°C for 4 hours, centrifuge to remove most of the acid, filter and wash the CNTs with deionized water until neutral, and dry them for later use;

[0036] 2. Weigh 10 mg of CNTs prepared in step 1, add 20 mL of deionized water, and ultrasonically disperse for 0.5 h to prepare a 0.5 mg / mL CNTs dispersion. Adjust the pH value to 6 with 0.05mol / L NaOH solution, and place it for later use.

[0037] 3. Cut the 150-mesh Ti net into a size of 2cm×2cm, soak it in 40% NaOH solution at 80°C for 2 hours to remove surface oil, wash it with distilled water until it is neutral, then soak it in 15% oxalic acid solution to remove the surface Oxides, kept at 98°C for 2 hours, rinsed with distilled water, and dried with nitrogen for later use;

[0038] 4. Use the CNTs dispersion liquid configured in step 2 as the electrophoretic deposition liquid, use the Ti mesh trea...

Embodiment 3

[0041] 1. Weigh 800mg of CNTs, add 25mL of concentrated nitric acid and 75mL of concentrated sulfuric acid After 4 hours of ultrasonic cleaning at room temperature, reflux at 60°C for 2 hours, centrifuge to remove most of the acid, filter and wash the CNTs with deionized water until neutral, and dry them for later use;

[0042] 2. Weigh 10 mg of CNTs prepared in step 1, add 20 mL of deionized water, and ultrasonically disperse for 0.5 h to prepare a 0.5 mg / mL CNTs dispersion. Adjust the pH value to 6 with 0.05mol / L NaOH solution, and place it for later use.

[0043] 3. Cut the 150-mesh Ti net into a size of 2cm×2cm, soak it in 40% NaOH solution at 80°C for 2 hours to remove surface oil, wash it with distilled water until it is neutral, then soak it in 15% oxalic acid solution to remove the surface Oxides, kept at 98°C for 2 hours, rinsed with distilled water, and dried with nitrogen for later use;

[0044] 4. Use the CNTs dispersion liquid configured in step 2 as the electr...

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PUM

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Abstract

The invention discloses a preparation method of a CNT (carbon nano-tube) membrane electrode CNT-Ti electrode used as a catalyst carrier and an application of the CNT membrane electrode CNT-Ti electrode, belonging to the technical field of electrochemical water treatment. The preparation method comprises the steps of combining two physical modes, namely ultrasound and reflux, introducing carboxyl functional groups to the wall of the CNT by adopting a concentrated acid oxidation method, determining the optional treatment method of the CNT and the optional pH value of dispersion liquid through a boehm titration method and the measurement of the zeta potential, and regulating the pH value of the dispersion liquid of the CNT to be 6, wherein the zeta potential is -53mV at the moment, so that a CNT membrane is successfully prepared on the surface of a titanium mesh by adopting electrophoretic deposition in a water phase. The preparation method is good in membrane-forming effect; the CNT membrane is uniform in dispersion, strong in capacity of loading metal catalysts and simple and convenient in operation, is an ideal catalyst carrier material, and provides material conditions for preparing electro-catalytic electrodes in the water phase.

Description

technical field [0001] The invention belongs to the technical field of electrochemical water treatment, and relates to the preparation and application of a carbon nanotube membrane electrode used as a catalyst carrier, and specifically relates to a carbon nanotube-loaded carbon nanotube film with a titanium mesh as the substrate, which aims at treating organic matter in the water phase. Membrane electrode preparation method. Background technique [0002] As a typical one-dimensional nanomaterial, carbon nanotubes (CNTs) have many unique properties compared with other traditional carbon materials, such as good electrical conductivity, high energy density distribution, large specific surface area, strong mechanical properties, and hydrogen storage properties. etc. In recent years, CNTs have received more and more attention as electrode materials. [0003] Due to the excellent performance of CNTs, researchers are committed to applying CNTs as catalyst supports to the electroca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D15/00C02F1/46
Inventor 孙治荣杜冉魏学锋
Owner BEIJING UNIV OF TECH
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