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Method for preparation of water-soluble luminous graphite-phase carbon nitride nano kelp

A graphitic carbon nitride, water-soluble technology, applied in chemical instruments and methods, nanotechnology, luminescent materials, etc., can solve the problems of poor material dispersibility, complicated steps and long time in the preparation method, and achieve the preparation method. Simple, stable luminescence, good dispersion effect

Active Publication Date: 2015-12-16
ZHENGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although different morphologies of nanoscale graphitic carbon nitride (g-C 3 N 4 ) preparation method has been reported, but the prepared nano-graphitic carbon nitride (g-C 3 N 4 ) materials are mostly poorly dispersed in water, and the preparation method may require complicated steps and a long time. Therefore, research on the preparation of water-soluble luminescent nanoscale graphitic carbon nitride (g-C 3 N 4 ) of the simple green approach has significant

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  • Method for preparation of water-soluble luminous graphite-phase carbon nitride nano kelp

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Embodiment 1

[0024] A preparation method of water-soluble luminous graphite phase carbon nitride nano-kelp, the specific steps are as follows:

[0025] Take 8.0 grams of dicyandiamide and add it to 15.2 grams of mixed salt of zinc chloride and potassium chloride with a molar ratio of 1:1.5, grind it thoroughly, and transfer it to a crucible.

[0026] At room temperature, put the crucible in a muffle furnace, feed nitrogen, raise the temperature to 600°C at a rate of 5°C / min, then raise the temperature to 700°C at a rate of 10°C / min, keep it for 2 hours, and then cool to room temperature; Solid frit.

[0027] Grind the obtained solid frit, add 0.25M dilute hydrochloric acid and stir to form a suspension evenly, and centrifuge the suspension to obtain graphite phase carbon nitride nano-kelp precipitate, then wash it with dilute hydrochloric acid for 5 times, and then use deionized Washed with water, freeze-dried to obtain light yellow powder, identified by XRD, the product is graphite phase...

Embodiment 2

[0029] A preparation method of water-soluble luminous graphite phase carbon nitride nano-kelp, the specific steps are as follows:

[0030] Take 8.0 grams of melamine and add it to 33.6 grams of mixed salt of sodium chloride and potassium chloride with a molar ratio of 1:1.2, grind it thoroughly, and then transfer it to a crucible.

[0031] At room temperature, the temperature was raised to 670°C at a rate of 5°C / min, kept for 2 hours, and then cooled to room temperature at a rate of 3°C / min to obtain a light yellow solid frit.

[0032] The obtained light yellow solid frit was ground, added 0.03M dilute hydrochloric acid, stirred for 30 minutes to obtain a suspension, and the obtained suspension was centrifuged to obtain a graphite phase carbon nitride nano-kelp precipitate, which was then washed with dilute hydrochloric acid for 5 times, and then washed with deionized water, freeze-dried to obtain graphitic carbon nitride nano-kelp.

Embodiment 3

[0034] A preparation method of water-soluble luminous graphite phase carbon nitride nano-kelp, the specific steps are as follows:

[0035] Take 16.0 grams of urea and add it to 18.2 grams of mixed salt of sodium chloride and lithium chloride with a molar ratio of 1:0.7, grind it thoroughly, and transfer it to a crucible.

[0036] At room temperature, the crucible was placed in a muffle furnace, fed with nitrogen, heated to 600°C at a rate of 5°C / min, kept for 1 hour, and then cooled to room temperature to obtain a solid frit.

[0037] The obtained solid frit was ground, added 0.2M dilute hydrochloric acid, stirred evenly to obtain a suspension, and the obtained suspension was centrifuged to obtain a graphite phase carbon nitride nano-kelp precipitate, which was then washed 5 times with dilute hydrochloric acid, and the The precipitate is dispersed in water for later use.

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Abstract

The invention provides a method for preparation of water-soluble luminous graphite-phase carbon nitride nano kelp. The water-soluble luminous graphite-phase carbon nitride nano kelp is obtained by high-temperature polycondensation of precursors containing carbon and nitrogen in a mixed molten chloride salt system. The method is universal, and target products can be obtained by adoption of various precursors; the prepared nano kelp is uniform in shape, excellent in dispersibility in water, capable of forming high-concentration stable transparent colloidal solution and stable in existence in both alkaline and weak acidic environments; under excitation of ultraviolet light, solid nano kelp and the colloidal solution thereof both have strong and stable blue photoluminescence. On the basis of excellent photoluminescence performance and water solubility, the nano kelp is expected to serve as fluorescent probes to be applied to the fields of bioimaging, biomedical engineering, analysis, monitoring and the like, and large-scale production is expected to realize. Furthermore, the method for preparation of the water-soluble luminous graphite-phase carbon nitride nano kelp has the advantages of simplicity in operation, environment friendliness, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of material synthesis, and in particular relates to a preparation method of water-soluble luminescent graphite-phase carbon nitride nano-kelp. Background technique [0002] Graphite carbon nitride (g-C 3 N 4 ) is only composed of carbon and nitrogen, and is the most stable of the five allotropes of carbon nitride. It can be formed from precursors containing nitrogen and carbon, such as urea, dicyandiamide, melamine, etc., through thermal polycondensation reaction And made. Due to its small forbidden band width (2.7eV), wide spectral response range and stable chemical properties, graphitic carbon nitride (g-C 3 N 4 ) has been applied in the fields of photocatalysis, electrochemical sensors and electrode materials (Wang, Angewandte Chemie International Edition, 2012: 68-89). Recently, based on graphitic carbon nitride (g-C 3 N 4 ) with high fluorescence intensity, good biocompatibility and non-toxic pro...

Claims

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Application Information

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IPC IPC(8): C01B21/082C09K11/65B82Y40/00B82Y30/00
Inventor 李中军王雅苹王建设李一珂鞠伟王吉超要红昌
Owner ZHENGZHOU UNIV
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