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A method for preparing porous graphitic carbon nitride using carbon nanotubes as a hard template

A technology of graphite phase carbon nitride and carbon nanotubes, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve the problems of complicated process, waste of resources, non-recyclable use, etc. Good repeatability, resource saving, and less impurity components

Active Publication Date: 2021-11-23
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the methods reported in the literature for the preparation of porous graphite phase carbon nitride require the use of templates, and then use strong acid to remove the templates. The process is complicated. More importantly, the templates are all disposable and cannot be recycled, resulting in serious waste of resources

Method used

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  • A method for preparing porous graphitic carbon nitride using carbon nanotubes as a hard template
  • A method for preparing porous graphitic carbon nitride using carbon nanotubes as a hard template
  • A method for preparing porous graphitic carbon nitride using carbon nanotubes as a hard template

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Effect test

Embodiment 1

[0024] 4g of urea was used as the graphite phase carbon nitride precursor, and 50mg of multi-walled carbon nanotubes were used as the hard template. The two were ground and mixed evenly and placed in a covered crucible. After heating up in a nitrogen-protected tube furnace, the temperature was kept at 2.5 Heat up to 550°C at a heating rate of °C / min, hold for 4 hours, and then cool to room temperature. After ultrasonically dispersing the obtained solid in water for 10 min, take the upper dispersion liquid for another 10 min, and take the upper dispersion liquid to remove the carbon nanotubes. Centrifuge the upper layer dispersion liquid obtained by ultrasonication twice at 8000 rpm / min for 10 min, remove the lower layer and dry it in vacuum at 60° C. to obtain porous graphite phase carbon nitride.

Embodiment 2

[0026] Using 4g of dicyandiamide as the graphite phase carbon nitride precursor and 50mg of multi-walled carbon nanotubes as the hard template, the two are ground and mixed evenly and placed in a covered crucible, heated up in a nitrogen-protected tube furnace and then kept warm , heated to 550°C at a heating rate of 2.5°C / min, kept for 3 hours, and then cooled to room temperature. After ultrasonically dispersing the obtained solid in water for 10 min, take the upper dispersion liquid for another 10 min, and take the upper dispersion liquid to remove the carbon nanotubes. Centrifuge the upper layer dispersion liquid obtained by ultrasonication twice at 8000 rpm / min for 10 min, remove the lower layer and dry it in vacuum at 60° C. to obtain porous graphite phase carbon nitride.

Embodiment 3

[0028] Using 4g melamine as the graphite phase carbon nitride precursor and 100mg multi-walled carbon nanotubes as the hard template, the two were ground and mixed evenly and placed in a covered crucible, heated up in a nitrogen-protected tube furnace and then kept warm at 2.5 Heat up to 580°C at a heating rate of °C / min, hold for 3 hours, and then cool to room temperature. After ultrasonically dispersing the obtained solid in water for 10 min, take the upper dispersion liquid for another 10 min, and take the upper dispersion liquid to remove the carbon nanotubes. Centrifuge the upper layer dispersion liquid obtained by ultrasonication twice at 8000 rpm / min for 10 min, remove the lower layer and dry it in vacuum at 60° C. to obtain porous graphite phase carbon nitride.

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Abstract

The invention provides a method for preparing porous graphite phase carbon nitride by using carbon nanotubes as a hard template, and belongs to the field of new semiconductor photocatalysts. The method adopts carbon nanotubes as a hard template, mixes carbon nanotubes and graphite-phase carbon nitride precursors, heats them together, and then removes carbon nanotubes through simple ultrasonic treatment to prepare porous graphite-phase carbon nitride. It can be used as a semiconductor photocatalyst material for photocatalytic degradation of dyes, and its photocatalytic activity is significantly improved compared with the original graphitic carbon nitride. Compared with the porous graphite phase carbon nitride prepared by the traditional hard template method, the present invention uses carbon nanotubes as the hard template, the preparation process is simple, the template does not need to be etched and removed, the impurity components are less, the repeatability is good, and there is no pollution, and The carbon nanotube hard template can be recycled and used to save resources.

Description

technical field [0001] The invention belongs to the field of novel semiconductor photocatalysts, and in particular relates to a method for preparing porous graphite phase carbon nitride by using carbon nanotubes as hard templates. Background technique [0002] Among many renewable energy sources, semiconductor-based photocatalysis is a technology that can directly capture, convert and store solar energy. Converting solar energy into chemical energy is an effective method in utilizing solar energy because of its It has received great attention due to its broad application prospects in energy and environment. Until now, directly converting solar energy into energy fuels and chemical energy has been considered as one of the ways to obtain green and sustainable energy and solve energy and environmental problems in the future. In addition to solar energy as the driving force, photocatalysis also requires suitable semiconductor materials to complete many catalytic reactions such ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01J37/34B01J37/08C02F1/30C02F101/30C02F101/34C02F101/36C02F101/38
Inventor 陈翔王浩楠徐东裴立宅
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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