Optical sensing of H_2O_2 based on red-shift of emission wavelength of carbon quantum dots

Abstract

In this paper, the multicolor photoluminescence carbon quantum dots (CQDs) have been synthesized by one step hydrothermal method to analyze hydrogen peroxide (H 2 O 2 ). These CQDs exhibited multicolor emission under a single wavelength excitation for the quantification of H 2 O 2 . Using an LED with a central wavelength of 365 nm as the excitation source, it is shown that the red emission CQDs capable of detecting H 2 O 2 over the linear range of 0-88.2 mM and the H 2 O 2 sensitivity of wavelength shift to changes in the H 2 O 2 concentration was found to be 0.18 nm/mM. These results of the optical sensing method can be used in practice detection of H 2 O 2 and could offer a new approach for developing a new biosensor. The CQDs exhibit good emission property and high stability, as well as excitation-independent emission behavior. Moreover, it is attractive that CQDs can be used as an effective fluorescent probe for the detection of H 2 O 2 with linear Stern-Volmer plot and wavelength shift in an aqueous solution.

Carbon Dots and Their Polymeric Nanocomposites: Insight into Their Synthesis, Photoluminescence Mechanisms, and Recent Trends in Sensing Applications

“…The multicolor luminescence CQDs for H 2 O 2 provide excellent analytical performance with affordable, convenient, and sensitive detection. Figure a gives an illustration of experimental set up for the detection of H 2 O 2 . As a novel ratiometric fluorescent probe for point-of-care testing (POCT) of dipicolinic acid (DPA), a biomarker of anthrax, Wang et al reported Eu­(III) CDs (CDs-Eu).…”

“…Figure 8 a gives an illustration of experimental set up for the detection of H 2 O 2 . 204 As a novel ratiometric fluorescent probe for point-of-care testing (POCT) of dipicolinic acid (DPA), a biomarker of anthrax, Wang et al reported Eu(III) CDs (CDs-Eu). The CDs served as a scaffold for coordination with Eu(III) ions and a luminescence reference in the probe (CDs-Eu).…”

“… (a) Schematic diagram showing the experimental arrangement for H 2 O 2 detection. Reproduced with permission from ref ( 204 ). Copyright 2016 Optica Publishing.…”

Eosin-Y containing electrospun fibers for optical ammonia sensing based on wavelength shift

“…Fluorophore absorption spectroscopy was obtained using a UV-VIS spectrophotometer. A USB 4000 spectrometer was used to measure emissions (Ocean Optics) [22,23].…”

A novel optical dual sensor based on a coaxial electrospinning method for simultaneous sensing of oxygen and ammonia

“…Due to the critical need for optical gas sensors in various domains, such as environmental monitoring, healthcare, industry, and clinical fields, numerous gas sensor devices have been proposed to detect specific gases, such as oxygen [ 3 ], carbon dioxide [ 4 , 5 ], and ammonia [ 6 ]. In evaluating the performance of an optical gas sensor, several analytical approaches have been employed, such as fluorescence quenching [ 7 ], phase shift [ 8 ], wavelength shift [ 9 , 10 ], and the alteration in fluorescence lifetimes due to fluorescence resonance energy transfer (FRET) [ 11 ].…”