Method for preparing graphite phase carbon nitride material

A graphite-phase carbon nitride and uniform technology, which is applied in chemical instruments and methods, catalyst carriers, chemical/physical processes, etc., can solve the problems of small specific surface area and low efficiency of catalytic materials, and shorten material preparation time and energy consumption Low, no heat loss effect

Active Publication Date: 2017-03-29
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention is in order to solve current g-C 3 N 4 Catalytic materials have problems such as small specific surface area and low efficiency, and provide a method for preparing graphite phase carbon nitride (g-C 3 N 4 ) material method

Method used

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  • Method for preparing graphite phase carbon nitride material

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Effect test

Embodiment 1

[0029] A method for preparing graphite phase carbon nitride material:

[0030] (1) Preparation of sample precursor

[0031] Weigh 5g and 0.5g of dicyandiamide and nano-silica respectively, put the weighed raw materials into a grinder, grind for 10 minutes to make them mix uniformly, weigh the ground samples, and then put the samples into the test chamber. In the sample tape, label it for later use.

[0032] (2) Roasting of samples:

[0033] Microwave roasting: Weigh 3g of the prepared sample, put it into a crucible and put the crucible into the microwave oven, find the best temperature measurement point, close the microwave oven lid, and then vacuumize the furnace to control the vacuum degree in the furnace at 0.08MPa And turn on the condensed water, then turn on the power switch of the microwave oven, adjust the microwave power button to about 3kW and microwave the sample for 30 minutes. to 0MPa, then turn off the power, take out the burnt sample and weigh it, then grind, ...

Embodiment 2

[0037] A method for preparing graphite phase carbon nitride material:

[0038] (1) Preparation of sample precursor

[0039] Weigh 5g and 0.5g of dicyandiamide and nano-silica respectively, put the weighed raw materials into a grinder, grind for 10 minutes to make them mix uniformly, weigh the ground samples, and then put the samples into the test chamber. In the sample tape, label it for later use.

[0040] (2) Roasting of samples:

[0041] Weigh 3g of the prepared sample, put it into the crucible and put the crucible into the inner furnace of the muffle furnace, set the muffle furnace to raise the temperature at a rate of 2.3°C per minute, rise to 550°C, keep the temperature for 4h, and then set the temperature at 1°C per minute The cooling rate is reduced to 100°C, and then naturally cooled to below 50°C, the burnt sample is taken out and weighed, then ground, loaded, and labeled for later use.

[0042] (3) Post-processing

[0043] Take 1g of the sample that will be fire...

Embodiment 3

[0045] A method for preparing a graphite phase carbon nitride material with a large specific surface area:

[0046] (1) Preparation of sample precursor

[0047] Weigh 5g and 0.5g of dicyandiamide and nano-silica respectively, put the weighed raw materials into a grinder, grind for 10 minutes to make them mix uniformly, weigh the ground samples, and then put the samples into the test chamber. In the sample tape, label it for later use.

[0048] (2) Muffle furnace firing:

[0049] Weigh 3g of the prepared sample, put it into the crucible and put the crucible into the inner furnace of the muffle furnace, set the muffle furnace to raise the temperature at a rate of 2.3°C per minute, rise to 550°C, keep the temperature for 4h, and then set the temperature at 1°C per minute The cooling rate is reduced to 100°C, and then naturally cooled to below 50°C, the burnt sample is taken out and weighed, then ground, loaded, and labeled for later use.

[0050] (3) Post-processing

[0051] ...

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Abstract

The invention relates to a preparation method of a photoelectrocatalytic and thermocatalytic carrier material, and concretely relates to a method for preparing a graphite phase carbon nitride (g-C3N4) material. The method comprises the following steps: 1, preparation of a sample precursor; 2, calcination of a sample; 3, post-treatment; and 4, secondary calcination. The above product prepared through microwave calcination and muffle furnace calcination has a 3 times higher specific surface area than the product prepared through present methods due to the doping of silica, so the properties of the g-C3N4 used as a catalyst material are improved; and the yield of the product reaches 50% in the invention. The method disclosed in the invention has the advantages of short synthesis period, easiness in operation, and reliable and effective data, is far better than present technologies, and is an ideal method for effectively synthesizing the g-C3N4 material. The secondary calcination of a primary product makes the specific surface area of the product increased by 3 times based on the primary calcination.

Description

technical field [0001] The invention relates to the preparation of photoelectric catalysis and thermal catalysis carrier materials, in particular to a preparation of graphite phase carbon nitride (g-C 3 N 4 ) material method. Background technique [0002] Graphite carbon nitride (g-C 3 N 4 ) is a new type of material with a unique structure: rich pore structure, strong thermal stability, large specific surface area, etc., especially its structure has a strong adjustable variability, these characteristics make g-C 3 N 4 has received widespread attention. Due to its excellent electrochemical properties, it has been used by many researchers in the field of photoelectrocatalysis [1] . Due to differences in research directions and purposes, various g-C 3 N 4 Preparation methods are developed. Zheng et al. [2] Using SBA-15 as a template, g-C with mesoporous structure was successfully prepared 3 N 4 and g-C 3 N 4 / C, according to its structural characterization, it c...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J32/00B01J35/10
CPCB01J27/24B01J35/39B01J35/33B01J35/61
Inventor 刘树森程铭罗东谋裴永丽任军
Owner TAIYUAN UNIV OF TECH
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