Green carbon quantum dots from sustainable lignocellulosic biomass and its application in the detection of Fe3+

Lignocellulosic Biomass‐Based Carbon Dots: Synthesis Processes, Properties, and Applications

“…These stages are differentiated by their distinct energy conversion and synthesis processes. [37] Summarizing the existing studies, the specific formation steps of C-CDs can be delineated as follows. The presence of robust intramolecular and intermolecular hydrogen bonds in cellulose chains can hinder hydrolysis reactions.…”

“…Metal ions are believed to form efficient chelation or coordination among CDs, thereby increasing nonradiative transitions and fluorescence quenching. [23,37,74,187] Theoretically, the main driving force for CDs' electron transferring is the energy gap between Reproduced with the permission. [37] Copyright 2020, Springer Nature B.V. d) Quenching spectra of CDs with different concentrations of different molecules with corresponding spectral overlap.…”

“…Among them, lignocellulosic biomass derived from agroforests have attracted the most attention. [35][36][37][38][39] A large number of green, low-cost, and readily available natural compounds (such as lignin and glycan) always exhibit active and complex chemistry, guaranteeing that lignocellulosic materials can serve as ideal starting precursors of synthesizing CDs. Cellulose has a carbon content of 44%, while the carbon content in hemicellulose is slightly lower than that in cellulose.…”

A fluorescence visual detection for glyphosine based on a biomass carbon quantum dot paper-based sensor

“…2A). 27 The peaks at 3462 cm À1 were attributed to the N-H and O-H stretching vibrations. 28,29 The peak at 1601 cm À1 observed in N-CQDs and CQDs was caused by the CQC/CQO stretching vibration, the peak at 1355 cm À1 was ascribed to the C-O stretching vibration, and the peaks at 1151 cm À1 were attributed to the C-N stretching vibration.…”

γ-Valerolactone/H2O Binary Solvent for One-Pot Preparation and Functional Tailoring of Lignin-Based Carbon Dots

“…Carbon dots (CDs) are a new type of quasi-zero-dimensional carbon-based fluorescent nanomaterial with a size of less than 10 nm, which has excellent optical properties, good biocompatibility, excellent fluorescence stability, and low toxicity. , At present, carbon dots have broad application prospects in ion sensor, − biological imaging, − drug transport, − anti-counterfeiting encryption, and other fields. The current consensus on the structure of CDs is that CDs exhibit a highly ordered aromatic polymerization structure of graphene, binding rich oxygen-containing functional groups at the edges .…”