A carbon-dot fluorescence capillary sensor for the determination of chemical oxygen demand

Nitrogen‐Doped Bifunctional Carbon Dots: Photoluminescence Investigation, and Fluorescent Recognition Applications

“…The strong oxidizing properties of HClO may be the main cause of the fluorescence quenching of CDs, Therefore, ascorbic acid (AA), a commonly used non-toxic and harmless reducing agent, was added to CDs, the experimental results show that the blue fluorescence of the sensor can be mostly recovered, demonstrating that the fluorescence quenching and recovery of CDs by HClO/AA is attributed to the oxidation/reduction reaction. CD-FCS [d] Hydrothermal, 180 °C, 3 h 0.2-40 0.1 [29] [d] carbon-dot fluorescence capillary sensor Similarly, the effect of KMnO 4 reactants on the fluorescence quenching of the sensor was investigated. Figure 11 shows the overlap of the UV-vis absorption peaks of KMnO 4 with the excitation and emission spectra of a-CDs, b-CDs, and c-CDs.…”

“…So far, the exact quenching mechanism of CDs is still much debated, and the widely accepted mechanisms of fluorescence quenching of the sensor by HClO and KMnO 4 are fluorescence internal filtering effect (FIFE) and REDOX reaction. [29][30] In Table 3. A comparison of our method with the reported analytical methods for detection of ClO À .…”

A portable fluorescence detection device based on a smartphone employing carbon nanodots for Mn2+ sensing

“…32,33 As a result, CDs have received much interest in recent years for the creation of various sensing platforms. [34][35][36] Many researchers reported the application of CDs for heavy metal ion sensing. For example, Annamalai et al 37 reported on a uorescence sensor for Cr(IV) and Hg(II) detection by using CDs synthesized from ethylenediamine and ethylene glycol.…”