Enhanced photocatalytic degradation of antibiotics in water over functionalized N,S-doped carbon quantum dots embedded ZnO nanoflowers under sunlight irradiation

Sunlight-Driven Photocatalytic Degradation of Ciprofloxacin by Carbon Dots Embedded in ZnO Nanostructures

“…The presence of CDs on the surface of ZnO can be identified from the lattice fringes with d-spacings of 0.32 nm (Figure 2e), which is consistent with the literature reports of CDs. 43,48 In addition, fringes with an interplanar spacing of 0.26 nm were also found, which corresponded to the (100) plane of ZnO nanocrystals (Figure 2e). 47 The selected area electron diffraction (SAED) pattern shows constructive interference patterns confirming the polycrystalline nature of ZnO/CD NCs (Figure 2f).…”

“…Converesly , the major limitation of ZnO is attributed to its chemical stability in aqueous medium owing to its hydrolysis and leaching. , It is noted that photocatalytic degradation of antibiotics by single-component ZnO NPs are not yet promising. Recently, ZnO–TiO 2 NCs and N,S-functionalized carbon quantum dots embedded into ZnO nanoflowers were reported to show improved photocatalytic degradation of antibiotics under UV and natural sunlight. , There is definitely enough scope to develop simpler and easy-to-synthesize sunlight-mediated ZnO-based nanostructures for achieving highly efficient photocatalytic degradation of antibiotics in aqueous medium. Our present study is based on overcoming the aforesaid limitations by developing chemically stable CD-embedded ZnO nanostructures for photocatalytic degradation of CIP via sunlight exposure.…”

Two-photon excitable membrane targeting polyphenolic carbon dots for long-term imaging and pH-responsive chemotherapeutic drug delivery for synergistic tumor therapy

“…2h). 9,37,38 This was due to the oxidation and sulfonation of phloroglucinol molecule at high temperature during g-CQDs synthesis which favoured the formation of large polyaromatic CQDs with CC, C–S, C–O, O–H, –SH, and –SO 3 H groups. Therefore, diversity in the surface functional groups and the unique crystalline structure of g -CQDs play the principal role in demonstrating the optical properties associated with the quantum confinement effect.…”

Photocatalytic activity study of ZnO modified with nitrogen–sulfur co-doped carbon quantum dots under visible light

“…And the oxygen-containing groups of C-O and CQO/O-H on the surface of ZnO/N,S-CQDs are located at 531.0 and 532.4 eV, respectively. 54 These results further illustrate the synthesis of N,S-CQDs and their successful loading on ZnO.…”