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Nitrogen-doped carbon quantum dots, and preparation method and application thereof

A technology of carbon quantum dots and nitrogen doping, which is applied in chemical instruments and methods, measuring devices, nanotechnology for materials and surface science, etc. It can solve the problems of complex product purification process, high instrument requirements, and high reaction temperature. Achieving the effects of sensitive detection practicability, strong yellow emission, good selectivity and

Inactive Publication Date: 2019-07-12
SHENZHEN INST OF GUANGDONG OCEAN UNIV +1
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Problems solved by technology

However, these methods have some common disadvantages, such as long reaction time, high reaction temperature, high requirements for instruments, complex preparation process and product purification process, and the use of one-step hydrothermal method to synthesize yellow nitrogen-doped quantum dots has not yet been seen. to report

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  • Nitrogen-doped carbon quantum dots, and preparation method and application thereof
  • Nitrogen-doped carbon quantum dots, and preparation method and application thereof
  • Nitrogen-doped carbon quantum dots, and preparation method and application thereof

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Embodiment Construction

[0035] It should be noted that, in the case of no conflict, the features in the embodiments of the present invention can be combined with each other. The meanings of the terms "comprising", "comprising", "containing" and "having" are non-limiting, that is, other steps and other components that do not affect the result can be added. The above terms encompass the terms "consisting of" and "consisting essentially of". Unless otherwise specified, materials, equipment, and reagents are commercially available.

[0036] In order to make the above objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] A method for preparing nitrogen-doped carbon quantum dots, using 1,2,4-triaminobenzene as a carbon precursor, reacting, separating and purifying, and specifically comprising the steps of:

[0038] S1. Response

[0039] Dissolve...

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Abstract

The invention provides nitrogen-doped carbon quantum dots, and a preparation method and application thereof. The preparation method for the nitrogen-doped carbon quantum dots comprises the steps of: with 1,2,4-triaminobenzene as a carbon precursor, and carrying out reacting, separating and purifying to obtain the quantum dots. According to the invention, the nitrogen-doped carbon quantum dots areprepared through a solvothermal method by taking the 1,2,4-triaminobenzene as the carbon precursor, show excellent monodispersity, photostability and storage stability and has strong yellow radiativity; through chemical composition and structure analysis, the nitrogen-doped carbon quantum dots are confirmed to contain various N-related functional groups; and the nitrogen-doped carbon quantum dotscan gradually generate a fluorescence quenching phenomenon due to Ag<+>, so that the prepared nitrogen-doped carbon quantum dots have better selectivity and sensitive detection practicability in the aspect of Ag<+> detection.

Description

technical field [0001] The invention relates to fluorescent nanomaterials, in particular to a nitrogen-doped carbon quantum dot and its preparation method and application. Background technique [0002] Carbon quantum dots (CDs), as a new class of fluorescent nanomaterials, have attracted much attention in recent years. Compared with traditional semiconductor quantum dots (QDs) and organic fluorescent dyes, carbon QDs have many advantages, including easy fabrication and functionalization, no / low toxicity, and high photostability, thus exhibiting various potential applications. To improve and tune the fluorescence properties of carbon quantum dots (such as quantum yields (QYs) and long-wavelength emission), surface modification and heteroatom doping are often used. . [0003] Related studies have shown that heteroatom doping such as B, N, S, P, Si, and Se can improve the emission properties of carbon quantum dots. Among them, N-doping is considered to be very effective. To...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/65G01N21/64B82Y20/00B82Y30/00B82Y40/00
CPCB82Y20/00B82Y30/00B82Y40/00C09K11/0883C09K11/65G01N21/643G01N2021/6432
Inventor 李承勇苏添添余梓桦陆宇琴陆子凡洪鹏志周春霞
Owner SHENZHEN INST OF GUANGDONG OCEAN UNIV