Preparation method of boron-doping carbon nitride as well as product and application thereof

A carbon nitride and boron doping technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve problems such as uneven doping of elements, and achieve uniform doping of elements and thin layers , Prepare the effect of simple operation

Active Publication Date: 2019-04-05
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the disadvantages of uneven element doping in the existing preparation of boron-doped carbon

Method used

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  • Preparation method of boron-doping carbon nitride as well as product and application thereof
  • Preparation method of boron-doping carbon nitride as well as product and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of boron-doped carbon nitride, which involves hydrothermal reaction of melamine and boric acid, and then roasts the precursor synthesized by the reaction to prepare boron-doped carbon nitride with uniform doping and thinner lamellar structure. Carbon, comprising the steps of:

[0021] Accurately weigh melamine, boric acid and water. The mass ratio of melamine to boric acid is 1:0.1, and the mass ratio of melamine to water is 1:50. First, add melamine and boric acid to the hydrothermal reaction kettle, stir well and then put them in the oven After heating up to a certain temperature (120°C), react for a period of time (6 hours), then filter, wash and dry the product in vacuum to obtain the precursor;

[0022] The precursor was ground and pulverized and put into a crucible for calcination. The heating rate was 2.5°C / min, the final calcination temperature was 500°C, and the calcination time was 3 hours. The obtained powder was boron-doped carbon nitrid...

Embodiment 2

[0024] A kind of boron-doped carbon nitride, the steps are close to Example 1, prepared according to the following steps:

[0025] Accurately weigh melamine, boric acid and water (the mass ratio of melamine to boric acid is 1:0.3, and the mass ratio of melamine to water is 1:80). In the oven, heat up to a certain temperature (180°C) and react for a period of time (5 hours), then filter, wash, and vacuum dry the product to obtain the precursor;

[0026] After the precursor is ground and pulverized, it is placed in a crucible for calcination (where the heating rate is 2.5°C / min, the final calcination temperature is 550°C, and the calcination time is 4 hours), and the obtained powder is boron-doped carbon nitride.

Embodiment 3

[0028] A kind of boron-doped carbon nitride, the steps are close to Example 1, prepared as follows:

[0029] Accurately weigh melamine, boric acid and water (the mass ratio of melamine to boric acid is 1:0.05, and the mass ratio of melamine to water is 1:80). In the oven, heat up to a certain temperature (120°C) and react for a period of time (5 hours), then filter, wash and dry the product in vacuum to obtain the precursor;

[0030] After the precursor is ground and pulverized, it is placed in a crucible for calcination (the heating rate is 2.5°C / min, the final calcination temperature is 600°C, and the calcination time is 2 hours), and the obtained powder is boron-doped carbon nitride.

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Abstract

The invention relates to a preparation method of boron-doping carbon nitride as well as a product and application thereof. By virtue of a hydrothermal reaction way of melamine and boric acid, on one hand, boron atoms have chemical reaction with melamine, so that the boron and carbon-nitrogen elements are mixed in an atomic level; on the other hand, the hydrothermal reaction is performed for the melamine in an acid environment, so that a supermolecule-like structure is formed, and the separation of a carbon nitride lamina structure in the subsequent roasting process can be facilitated; and a precursor synthesized in the reaction is roasted to prepare boron-doped carbon nitride which is uniform in doping and has a thinner lamina structure. The boron-doping carbon nitride prepared by adoptingthe preparation method of the invention is uniform in element doping, thinner in lamina, better in optical catalysis, simple in preparation operation, low in difficulty and suitable for enlarged production.

Description

technical field [0001] The invention belongs to the field of nanometer material preparation, and in particular relates to a method for preparing boron-doped carbon nitride and its products and applications. Background technique [0002] Energy crisis and environmental pollution are two major strategic issues facing the sustainable development of human society. With the depletion of traditional fossil energy such as coal, oil, natural gas, etc. and a series of environmental problems brought about in the process of use, for the effective use of clean energy, the problems in the field of water and air purification and control are urgent and important. The photocatalytic process can convert solar energy into chemical energy, and achieve water decomposition, degradation, and mineralization of environmental toxins through photocatalytic redox reactions. It has the advantages of stability, high efficiency, and pollution-free. Therefore, the photocatalytic technology with photocata...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J37/10B01J37/08C02F1/30C02F101/34C02F101/38
CPCC02F1/30B01J27/24B01J35/004B01J37/082B01J37/10C02F2101/34C02F2101/38C02F2305/10
Inventor 何丹农徐少洪王敬锋林琳陈振金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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