Method for preparing fluorescent adjustable p-phenylenediamine carbon dots

Abstract

The invention discloses a method for preparing fluorescent adjustable p-phenylenediamine carbon dots, wherein the method comprises the following steps: 1) preparation of p-phenylenediamine carbon dots: dissolving p-phenylenediamine powder in ethanol, then sintering, separating and eluting; and 2) preparation of the fluorescent adjustable p-phenylenediamine carbon dots: adding tert-butyl peroxide radicals into an aqueous solution of the p-phenylenediamine carbon dots obtained in the step 1), and incubating, to obtain the carbon dots with emission sites at 450 nm, 490 nm and 530 nm. The invention provides the method for adding high-concentration tert-butyl peroxide radicals to change the particle size of the p-phenylenediamine carbon dots and thus obtaining the carbon dots at different fluorescence emission sites for the first time. By changing the precursor materials prepared by the carbon dots, the carbon dots with different fluorescence emission wavelengths are obtained. The operationis simple and the cost is saved.

Description

technical field [0001] The invention belongs to the field of carbon nanotechnology, and relates to a method for preparing photoluminescence-fluorescent adjustable carbon dots, especially for the rapid conversion of p-phenylenediamine carbon dots into another carbon dot with three emission sites, specifically By adding tert-butyl peroxy radicals and changing the particle size of p-phenylenediamine carbon dots to obtain carbon dots with different emission sites. Background technique [0002] As a new type of carbon nanomaterial, compared with traditional semiconductor quantum dots, fluorescent carbon dots not only have comparable fluorescence characteristics, but also have low toxicity, excellent biocompatibility and environmental friendliness due to their carbon nature. It has attracted widespread attention in the fields of detection, bioimaging, drug carriers, photocatalysis and electrocatalysis, and has achieved good research results, showing its potential application value...

AI Technical Summary

Problems solved by technology

The previously reported experimental process of changing the fluorescence emission wavelength by modifying and doping elements is complex and uncertain

Therefore, the realization of tunable fluorescence is mostly achieved by changing the precursors for the preparation of carbon dots, and it is relatively rare to easily obtain materials with different light-emitting sites from the original carbon dots by simply adding exogenous substances.

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