Method of manufacturing luminescent nanocarbon

Patent metadata

Field	Value
Publication number	US-2018244991-A1
Application number	US-201615755359-A
Country	US
Kind code	A1
Filing date	Aug 24, 2016
Priority date	Aug 25, 2015
Publication date	Aug 30, 2018
Grant date	—

Abstract

An object is to provide a method of manufacturing luminescent nanocarbon with which the luminescent nanocarbon can be efficiently manufactured in large amounts. This method is to manufacture luminescent nanocarbon (Product) from a raw material aqueous solution that contains a carbon source compound and a nitrogen source compound. This method includes a reaction step of heating the raw material aqueous solution from a storage container (Reservoir) in a heating section (Furnace) to react the raw material aqueous solution at a reaction temperature of 100° C. or higher and 500° C. or lower and a cooling step of cooling a reaction solution that contains a reaction product generated in the reaction step. The cooling step is carried out in a bath (Ice bath).

First claim

1 . A method of manufacturing luminescent nanocarbon from a raw material aqueous solution containing a carbon source compound and a nitrogen source compound, the method comprising:
a reaction step of heating the raw material aqueous solution in a reaction container to react the raw material aqueous solution at a reaction temperature of 100° C. or higher and 500° C. or lower; and a cooling step of cooling a reaction solution containing a reaction product generated from the raw material aqueous solution in the reaction step.

2 . The method of manufacturing luminescent nanocarbon as recited in claim 1 , wherein the reaction step is carried out under a condition in which the raw material aqueous solution uniformly exists in the reaction container.

3 . The method of manufacturing luminescent nanocarbon as recited in claim 1 , wherein
the reaction step and the cooling step progress in different portions of the reaction container, a portion in which the reaction step progresses and a portion in which the cooling step progresses are connected to each other, and the raw material aqueous solution and the reaction solution move in the reaction container thereby to allow the reaction step and the cooling step to progress continuously and concurrently.

4 . The method of manufacturing luminescent nanocarbon as recited in claim 3 , wherein the reaction temperature is 200° C. or higher and 400° C. or lower.

5 . The method of manufacturing luminescent nanocarbon as recited in claim 1 , further comprising
an adjustment step of adjusting luminescence characteristics of the luminescent nanocarbon through manufacturing a plurality of luminescent nanocarbons and evaluating the luminescence characteristics of the plurality of luminescent nanocarbons, the plurality of luminescent nanocarbons being obtained by changing at least one of the raw material aqueous solution and a manufacturing condition.

6 . The method of manufacturing luminescent nanocarbon as recited in claim 5 , wherein the plurality of luminescent nanocarbons is manufactured from the raw material aqueous solution in which a ratio of the carbon source compound and the nitrogen source compound is different.

7 . The method of manufacturing luminescent nanocarbon as recited in claim 6 , wherein the carbon source compound is gluconic acid and the nitrogen source compound is ethylenediamine.

8 . The method of manufacturing luminescent nanocarbon as recited in claim 5 , wherein the plurality of luminescent nanocarbons is manufactured from a plurality of raw material aqueous solutions in which a combination of the carbon source compound and the nitrogen source compound is different.

9 . The method of manufacturing luminescent nanocarbon as recited in claim 5 , wherein the plurality of luminescent nanocarbons is manufactured with different temperatures in the reaction step.

10 . The method of manufacturing luminescent nanocarbon as recited in claim 1 , wherein the carbon source compound is quinic acid and the nitrogen source compound is ethylenediamine.

11 . The method of manufacturing luminescent nanocarbon as recited in claim 1 , wherein the carbon source compound is glucose and the nitrogen source compound is ethylenediamine.

12 . Luminescent nanocarbon having an emission wavelength within a range of 500 to 525 nm when using excitation light of a wavelength of 320 to 460 nm, the emission wavelength being a wavelength at which emission intensity of an emission spectrum of the luminescent nanocarbon is maximum.

Assignees

• Univ Nat Corp Kanazawa
• Aist

Inventors

• Hiejima Yusuke
• Hayashi Hiromichi
• Kanakubo Mitsuhiro

Classifications

• C09K11/65 Primary

  containing carbon (in organic compounds C09K11/06) · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• C09K11/08 Primary

  containing inorganic luminescent materials · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title