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Preparation method and application of functional carbon nanotube loaded Pd catalyst

A technology of carbon nanotubes and catalysts, which is applied in the field of preparation of functionalized carbon nanotube-supported Pd catalysts, can solve the problems that carbon-based catalysts have not been reported, and achieve remarkable catalytic oxidation performance, cheap equipment raw materials, and simple operation

Inactive Publication Date: 2018-11-02
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A review of the current research literature in this field found that the carbon-based catalysts and their preparation methods reported in this study have not been reported yet.

Method used

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  • Preparation method and application of functional carbon nanotube loaded Pd catalyst
  • Preparation method and application of functional carbon nanotube loaded Pd catalyst
  • Preparation method and application of functional carbon nanotube loaded Pd catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Acidification of carbon nanotubes: Mix 10 g of carbon nanotubes with 400 mL of 68 wt% concentrated nitric acid, reflux at 110 °C for 4 hours, cool to room temperature, wash with distilled water until neutral, dry at 80 °C, and then grind Stored as powder for later use, the sample is marked as OCNT;

[0032] Modified carbon nanotubes: Dissolve 0.08 g of citric acid, add drop by drop to 1 g of OCNT by impregnation, stir until uniform at room temperature, dry and heat in a pre-set blast oven at 180°C for 40 hours ; After cooling down to room temperature, wash with distilled water for 3 times, dry at 80°C and store for later use; the sample is marked as OCNT2;

[0033] Nitrogen-doped modified carbon nanotubes: Dissolve 0.25 g of urea in 10 mL of water, add dropwise to 0.5 g of the above-mentioned modified carbon nanotubes, transfer to the polytetrafluoroethylene liner of the hydrothermal kettle, seal it, and put it in the pre- Set it in a blast oven at 180°C, heat it for 8...

Embodiment 2

[0036] Acidification of carbon nanotubes: Mix 10 g of carbon nanotubes with 400 mL of 68 wt% concentrated nitric acid, reflux at 100 °C for 4 hours, cool to room temperature, wash with distilled water until neutral, dry at 80 °C, and then grind Stored as powder for later use, the sample is marked as OCNT;

[0037] Modified carbon nanotubes: dissolve 0.2 g of citric acid, add dropwise to 1 g of OCNT by impregnation, stir until uniform at room temperature, dry and heat in a pre-set blast oven at 180°C for 40 hours ; After cooling down to room temperature, wash 5 times with distilled water, dry at 80°C and store for later use; the sample is marked as OCNT5;

[0038] Nitrogen-doped modified carbon nanotubes: Dissolve 0.25 g of urea in 10 mL of water, add dropwise to 0.5 g of the above-mentioned modified carbon nanotubes, transfer to the polytetrafluoroethylene liner of the hydrothermal kettle, seal it, and put it in the pre- Set it in a blast oven at 180°C, heat it for 8 hours; a...

Embodiment 3

[0041] Acidification treatment of carbon nanotubes: 10 g carbon nanotubes were mixed with 400 mL of 68 wt% concentrated nitric acid, refluxed at 120 °C for 4 hours, cooled to room temperature, washed with distilled water until neutral, dried at 80 °C, and then ground Stored as powder for later use, the sample is marked as OCNT;

[0042] Modified carbon nanotubes: dissolve 0.4 g of citric acid, add dropwise to 1 g of OCNT by impregnation, stir until uniform at room temperature, dry and heat in a pre-set blast oven at 180°C for 40 hours ; After cooling down to room temperature, wash with distilled water 4 times, dry at 80°C and store for later use; the sample is marked as OCNT10;

[0043] Nitrogen-doped modified carbon nanotubes: Dissolve 0.25 g of urea in 10 mL of water, add dropwise to 0.5 g of the above-mentioned modified carbon nanotubes, transfer to the polytetrafluoroethylene liner of the hydrothermal kettle, seal it, and put it in the pre- Set it in a blast oven at 180°C...

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Abstract

The invention discloses a preparation method and application of a functional carbon nanotube loaded Pd catalyst. The preparation method comprises the following steps: carrying out in-situ introductionof carbon quantum dots through low temperature pyrolysis of citric acid and carrying out surface modification on carbon nanotubes; meanwhile, introducing nitrogen elements for co-modification; in addition, preparing a carbon-based catalyst with a metallic state Pd content as high as 76 percent by adopting simple processes such as equal-volume impregnation and hydrogen reduction. The catalyst hasobvious catalytic oxidation activity on benzyl alcohol (and derivatives thereof) and fatty alcohols; besides, the performance can be optimized by regulating synthesis conditions, so that the catalyticoxidation conversion rate of the benzyl alcohol can reach 92 percent.

Description

technical field [0001] The invention belongs to the technical field of carbon nanomaterial preparation, and in particular relates to a preparation method and application of a functionalized carbon nanotube-loaded Pd catalyst. Background technique [0002] Aromatic aldehyde compounds are important chemical raw materials, mainly used in the synthesis of important organic intermediates such as plastics, spices, resins and acids. Due to the environmental friendliness, the liquid-solid phase selective oxidation of aromatic alcohols using molecular oxygen as an oxidant is an important preparation method for the preparation of aromatic aldehydes. The key to this method lies in the selective regulation of the oxidation reaction. [0003] The use of supported metal heterogeneous catalytic systems for the selective oxidation of aromatic alcohols has always been a hot topic of research at home and abroad. Among them, Yan et al. grafted organosilane onto the surface of carbon nanotubes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J23/44B01J21/18C07C45/38C07C47/54C07C47/542C07C47/575C07C47/55C07C47/238C07C47/02C07C49/78
CPCB01J21/185B01J23/44B01J27/24C07C45/38C07C47/54C07C47/542C07C47/575C07C47/55C07C47/238C07C47/02C07C49/78
Inventor 谢在来谭彬罗智勇
Owner FUZHOU UNIV
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