Fluorescent Se-modified carbon nitride nanosheets as biomimetic catalases for free-radical scavenging

Abstract

Se-modified carbon nitride nanosheets with fluorescent properties and high biocompatibility show efficient free radical cleaning activity, and can be used as biomimetic catalases for resisting oxidative stress.

Emerging Concepts in Carbon Nitride Organic Photocatalysis

“…[59] Zhang and Wang employed different approaches to tune CNs properties by introducing electron deficient monomers into the CN structure to enhance photocatalyst performance in HER, [60] constructing internal triazine-heptazine donor-acceptor (D-A) heterostructure to reach AQY 60 % in HER, [61] using elemental doping with selenium for bioapplications. [62] Finally, a heterojunction between two or more semiconductors is used to improve performance of the hybrid material by reducing the recombination rate of photogenerated charge carriers. For example, Yu and Zhang developed a 0D/2D S-Scheme heterojunction material composed of CeO 2 quantum dots and CN for photocatalytic deactivation of bacteria.…”

“…Zhang and Wang employed different approaches to tune CNs properties by introducing electron deficient monomers into the CN structure to enhance photocatalyst performance in HER, [60] constructing internal triazine‐heptazine donor‐acceptor (D‐A) heterostructure to reach AQY 60 % in HER, [61] using elemental doping with selenium for bioapplications [62] …”

Phenyl-Modified Carbon Nitride Quantum Nanoflakes for Ultra-Highly Selective Sensing of Formic Acid: A Combined Experimental by QCM and Density Functional Theory Study

“…Recently, a metal-free graphitic carbon nitride (g-C 3 N 4 ), which is built up from layered (tris-)­triazine units with an ideal stoichiometry of g-C 3 N 4 , has attracted significant attention as a semiconductor material for different potential applications . Carbon nitrides are easy to prepare on large scales and are considered to be more promising candidates for bioimaging or energy and environmental applications than graphene-based nanomaterials because the preparation of the latter usually involves toxic or corrosive agents, and the resulting carbon materials exhibit relatively weak photoresponses. Shalom and co-workers recently developed a supramolecular preorganization approach to enhance the photocatalytic activity of g-C 3 N 4 . , Interestingly, this method was applied to grow modified g-C 3 N 4 thin films and phenyl-g-C 3 N 4 quantum dots (QDs) with a distinct photoluminescence (PL) behavior by utilizing a complex with phenyl-substituted triazines, which were then employed as an active layer in light-emitting diodes and solar cells , or as an imaging agent with cyan/green fluorescence for bioimaging applications .…”

Two-Dimensional Nanomaterials With Enzyme-Like Properties for Biomedical Applications

“…Chen's group found that the PVP-functionalized Nb 2 C NSs could greatly reduce ROS generation caused by ionizing radiation, thereby providing a kind of antioxidant based on 2D nanozymes for radioprotective applications (Ren et al, 2019). Wang's group also demonstrated the potential of Se-modified g-C 3 N 4 NSs against oxidative stress (Cao X. N. et al, 2020).…”