Preparation of N/S doped carbon dots and their application in nitrite detection

Abstract

Detection of carcinogens is generally recognized to be meaningful, especially for nitrites (NO2−).

High-Yield, Stable, and Ultrasensitive Carbon Dots for pH Sensing and Fe2+ Detection Are Synthesized at Room Temperature

“…Carbon quantum dots (CDs) have attracted much attention from researchers in recent years owing to their multiple merits, such as stable photoluminescence, robust chemical inertness, wide range of raw materials, excellent biocompatibility, low toxicity, adjustable optical properties, and cost-effective preparation. − In 2004, CDs were synthesized for the first time by Xu’s group using the arc discharge method, which opened a wave of research on CDs . Due to these distinctive as well as excellent properties, CDs have been widely applied to organic and inorganic analysis sensing detection, such as sensing of glucose, , cholesterol, − arginine, , oxides, and metal ions . In particular, CDs are one of the potential tools for pH detection and monitoring under extreme pH conditions because of their excellent photochemical stability and biocompatibility.…”

“…1−5 In 2004, CDs were synthesized for the first time by Xu's group using the arc discharge method, which opened a wave of research on CDs. 6 Due to these distinctive as well as excellent properties, CDs have been widely applied to organic and inorganic analysis sensing detection, such as sensing of glucose, 7,8 cholesterol, 9−11 arginine, 12,13 oxides, 14 and metal ions. 15 In particular, CDs are one of the potential tools for pH detection and monitoring under extreme pH conditions because of their excellent photochemical stability and biocompatibility.…”

Synthesis of multicolor-emitting nitrogen–sulfur co-doped carbon dots and their photochemical studies for sensing applications

“…These results indicated that the high selectivity of the g-CDs toward the detection of Cu 2+ is due to the unique structure of the g-CDs, which is the presence of thiocyanates groups on their surface, which is known to improve the adsorption of specic metal cations like Cu 2+ . 40,50 These arguments favored the development of non-luminescent complexes as the mechanism of quenching rather than electron transfer. The limit of detection was calculated based on the standard deviation of repeated blank measurements and the slope of calibration curve, 51 and it was found to be 10 mM.…”

Sensitive electrochemical sensor based on nickel/PDDA/reduced graphene oxide modified screen-printed carbon electrode for nitrite detection

“…Several analytical techniques have been developed for quantifying the amount of nitrite. Chromatography, 4,5 chemiluminescence, 6 colorimetry, 7 and spectroscopy 8,9 techniques offer good specicity and sensitivity; however, these techniques require the use of expensive instruments with complicated procedures and long response times. Among the numerous nitrite-detection techniques, the electrochemical technique is widely used for nitrite determination due to its rapid response, simplicity, high sensitivity, high selectivity and low detection limit.…”