Biogenic synthesis of carbon quantum dots from garlic peel bio‐waste for use as a fluorescent probe for sensing of quercetin

Abstract

Highly fluorescent and water‐soluble carbon quantum dots (CQDs) were synthesized from the bio‐waste source of garlic peels (renovation of bio‐waste into bio‐asset) using a controlled carbonization method. Synthesized CQDs were characterized by various analytical methods and explored as a fluorogenic probe for the recognition of quercetin (QT). Ultraviolet‐visible (UV‐vis) result shows an absorption maximum at 275 nm attributed to the conjugation of C=C and C=O of CQDs and demonstrates a blue emission in the range 330–410 nm. Selectivity was performed with various biomolecules, except for QT, all others do not exhibit any considerable change in the fluorescence of CQDs. On the interaction with QT, emission was completely quenched due to Förster energy transfer (FET), confirming the high selective to QT. Effect of pH, sensitivity, and stability studies displayed excellent results under optimized conditions. The limit of detection (LOD) fluorescent probe was found to be 6.73 μM. Our approach may suggest a new platform for the development of quick and low‐cost CQDs‐based sensors for environmental and biological purposes.

Development of a quercetin fluorescent sensor prepared from waste paper

“…According to IUPAC criteria, the detection and quantification limits were 0.8 and 2.6 mg L -1 quercetin, respectively. This detection limit is not as low as most of the limits reported for other quercetin analysis methodologies [3,7,28,[30][31][32][33], however, the sensor proposed here is more advantageous because of its low cost and simple preparation. Moreover, the present detection limit is slightly lower than the limit reported by de Paula et al [23] (0.85 mg L -1 ) and quite lower than the reported by Jeevika et al [34] (2.03 mg L -1 ).…”

An Enhanced Photosensitive Sensor Based on ITO/MWCNTs@Polymer Composite@BiVO4 for Quercetin Detection

“…In addition, it was determined as −0.85 V operating voltage, which gives the highest current value (0.82 µA) from the LSV curves. After the operating voltage was determined, the photocurrent response (i-t) curves of the same substances were taken (Figure 8B), and it was seen that the current in BiVO 4 NPs increases significantly from 0.27 to 0.82 µA depending on the light at the voltage determined as −0.85 V. Since conductive polymers are known to accelerate electron conduction in their located systems [10], in this study, PC was used to improve electron transfer between BiVO 4 and MWCNT structures due to its high electronic mobility (~1000 cm 2 V −1 s −1 ). In addition, the PC has been used to help MWCNTs and BiVO 4 NPs bond together, thereby increasing the durability of BiVO 4 NPs at the electrode surface.…”

“…Techniques including high-performance liquid chromatography (HPLC) [5,6], HPLC-mass spectrometry/mass spectrometry (MS/MS) [7,8], fluorescent methods [9][10][11], colorimetric techniques [12,13], chemiluminescent detection [14,15], biosensors [16,17],…”

Castor seed-derived luminescent carbon nanoparticles for metal ion detection and temperature sensing applications

“…It entails producing nanoparticles in an autoclave reactor at the desired temperature and pressure. Along with this, various natural precursors, including lemon juice [35] fish scale [36], red lentils [37], glucose [38], orange juice [39], tea leaves [40], soya milk [41], Honey [42], coffee grounds [43], Aloe Vera [44], garlic peel [45] sugarcane juice, watermelon juice [46], cow milk [7] konjac flour grass [47], sweet pepper [48], rose-heart radish [49] and, hair [50] etc has been investigated. Despite the use of various naturally occurring precursors for CNPs preparation, the search for novel ones continues.…”