Tuning the photoluminescence property of carbon dots by ultraviolet light irradiation

Abstract

Tuning of the photoluminescence property of carbon nanodots is realized by surface modification through ultraviolet light irradiation.

An Amberlite IRA-400 Cl− ion-exchange resin modified with Prosopis juliflora seeds as an efficient Pb2+ adsorbent: adsorption, kinetics, thermodynamics, and computational modeling studies by density functional theory

“…† The functional groups before the adsorption of SMA resin lead to corresponding adsorption bands at 3947.36 cm −1 , assigned to –NH– groups, 3420.57 cm −1 , assigned to –OH groups, 2928.57 cm −1 , assigned to C–H stretching groups, and 1599.67 cm −1 , 1354.98 cm −1 , 1040.50 cm −1 , and 583.93 cm −1 , assigned to C O, S O, C–X, and –C–C– functional groups, respectively. 22 Fig. 2a shows the SMA resin FT-IR spectrum after the adsorption of Pb 2+ under the following reaction conditions: temperature, 350 °C; pH, 4; concentration, 100 mg L −1 ; and time, 240 min.…”

Carbon Dots Fluorescence-Based Colorimetric Sensor for Sensitive Detection of Aluminum Ions with a Smartphone

“…This phenomenon was first discovered in semiconductor quantum dots (QD), and has been widely studied in the past few decades [42]. Due to the similar properties of CDs with QDs, the photoactivation property of CDs has been studied as well by many groups [43,44]. It is noting that the functional groups (C-O-C, C=C, -C=O, and -OH) of CD from naringin in our work are slightly reduced after UV light irradiation (Figure S3), that are similar with the Li's report [44].…”

“…Due to the similar properties of CDs with QDs, the photoactivation property of CDs has been studied as well by many groups [43,44]. It is noting that the functional groups (C-O-C, C=C, -C=O, and -OH) of CD from naringin in our work are slightly reduced after UV light irradiation (Figure S3), that are similar with the Li's report [44]. Therefore, we speculate that the photoactivation property of CDs from naringin may also result from the intrinsic states of CDs.…”

Carbon Nanodots for All-in-One Photocatalytic Hydrogen Generation

“…Photo-oxidation of CND is, to the best of our knowledge, unprecedented. Only postsynthetic redox modification of CNDs based on photoreductions under UV light are documented. , Notably, the production costs for pCNDs are low, as the synthetic method of pCNDs requires only 5 min of microwave reaction. In contrast, the more conventional autoclave-based synthetic methods involve a minimum of 6 h and in some cases reach up to 100 h. , An additional asset of the production of oCND-1 and oCND-2 is the use of sunlight.…”