Stimulating antibacterial activities of graphitic carbon nitride nanosheets with plasma treatment

Abstract

In this study, we have demonstrates that nitrogen-plasma-treated g-C3N4 nanosheet exhibits excellent and broad-spectrum antibacterial activity against eight foodborne pathogens in the absence of light illumination.

Supramolecular Copolymerization Strategy for Realizing the Broadband White Light Luminescence Based on N-Deficient Porous Graphitic Carbon Nitride (g-C3N4)

“…Additionally, the contribution ratio of different peaks 56 in N 1s and C 1s for GCN and GCN-xTAP (x = 0, 0.25, 0.5, 0.75, 1) according to XPS analysis is shown in Tables S2 and S3. Apparently, the N 3 contents (from 21.63 to 13.97%) of samples are decreased in varying degrees after TAP incorporation, which indicated that the N deficient comes from −NH x .…”

Restricted binding of a model protein on C3N4nanosheets suggests an adequate biocompatibility of the nanomaterial

“…Similarly, by using the combination of MD simulations and experiments, we discovered that this kind of specific interactions between positively charged groups of bacterial lipid head groups and the C 3 N 4 pores, also weakened the C 3 N 4 insertion into the bacterial membrane due to the strong binding interactions between the lipid head groups and the C 3 N 4 nanomaterial, reflecting the weak antibacterial activity of pristine C 3 N 4 (ref. 40 ). However, after nitrogen plasma treatment, the pores of C 3 N 4 were sealed, endowing the C 3 N 4 nanosheet with a more homogeneous surface that results in an increase in membrane insertion and the concomitant increase in the C 3 N 4 antibacterial activity.…”

“…Notably, C 3 N 4 was a porous 2D nanomaterial, in the sense that every pore is surrounded by six nitrogen atoms forming a negatively charged center (due to inherent charge transfer from the C atoms to the N atoms). The force field parameters for C 3 N 4 were obtained from our previous study, 40 and the details were shown in Fig. S1.…”

Metal-Free g-C3N4/Nanodiamond Heterostructures for Enhanced Photocatalytic Pollutant Removal and Bacteria Photoinactivation

“…Under light illumination, g-C 3 N 4 alone and in association with metals/semiconductors inactivated microorganisms through the generation of ROS [31]. Besides having photochemotherapy capabilities, g-C 3 N 4 nanosheets also displayed cytotoxicity by inducing the rupture of the cell membrane of bacteria upon direct mechanical contact [34]. A similar physical mechanism of action is proposed for DNC-based antimicrobial agents [33].…”