Hybridization of nickel oxide nanoparticles with carbon dots and its application for antibacterial activities

Abstract

A nickel oxide nanoparticle (NiO NP) composite with carbon dots (C-dots), (NiO NPs@C-dots) was synthesized, characterized, and then its antibacterial activity was evaluated. NiO NPs were prepared using Buddleja polystachya Fresen leaf extract and Ni(NO 3 ) 2 .6H 2 O as precursors. The C-dots were synthesized from benzene-1,-4-diamine and citric acid.

Carbon Dots for Killing Microorganisms: An Update since 2019

“…There are different types of metal-containing CDs that can be used as antimicrobial agents: metal ion-doped CDs [ 36 , 60 , 61 , 62 ], metal nanoparticle-decorated CDs [ 41 , 60 , 63 , 64 , 65 ], CD/metal oxide nanocomposites [ 66 , 67 , 68 , 69 , 70 ], and CD/metal sulfide nanocomposites [ 71 ]. First, CDs doped with metal ions such as Cu 2+ [ 36 ] and Ag + [ 60 ] have been explored as antimicrobial materials.…”

“…By inducing membrane disruption and intracellular DNA/protein damage, CD-2 displayed high and broad-spectrum antimicrobial activities against Gram-positive bacteria ( S. aureus ), Gram-negative bacteria ( E. coli , P. aeruginosa , and P. vulgaris ), and fungi ( S. cerevisiae ), with excellent biocompatibility. Third, CDs were integrated with metal oxide to form CD/metal oxide nanocomposites [ 66 , 67 , 68 , 69 , 70 ]. As an example, Gao et al fabricated CD/ZnO/ZnAl 2 O 4 nanocomposites which possessed an excellent antibacterial property with antibacterial ratios of 97% and 94% against S. aureus and E. coli , respectively [ 68 ].…”

Modification of Flexible Electrodes for P-Type (Nickel Oxide) Dye-Sensitized Solar Cell Performance Based on the Cellulose Nanofiber Film

“… 31 , 32 Nevertheless, by incorporating conductive materials, the non-conductive cellulose film can be converted into a conductive substrate and utilized as a flexible electrode. 29 , 33 − 36 CNF films can be used to embed active polymers, metal oxides, and carbon materials. So that the conductive film has been prepared and used as electrode devices, such as in flexible supercapacitors, fuel cells, solar cells, and so on.…”

“…In this case, the flexible electrode composed of cellulose nanofiber (CNF) film can be lighter and more comfortable to carry, allowing it to be used in place of commercially available flexible electrodes. The development of new kinds of flexible films, namely, the CNF film made from sustainable wood pulps, has been resisted. , Nevertheless, by incorporating conductive materials, the non-conductive cellulose film can be converted into a conductive substrate and utilized as a flexible electrode. ,− CNF films can be used to embed active polymers, metal oxides, and carbon materials. So that the conductive film has been prepared and used as electrode devices, such as in flexible supercapacitors, fuel cells, solar cells, and so on .…”

Green Synthesis of Nickel Oxide NPs Incorporating Carbon Dots for Antimicrobial Activities

“…The chemical materials of carbon compounds having the size smaller than 10 nm are known as carbon dots (C-dots). − These materials have special properties including chemiluminescence, photoluminescence, photoinduced electron transfer, and electrochemical luminescence. , C-dots find potential applications in bioimaging, , biosensing, , chemical sensing, and biomedicine . C-dots are the nanomaterials considered as potential candidates in the application of bioimaging, both in vitro and in vivo, and for diagnosis purposes, due to their unique fluorescent nature and having excellent biocompatibility, less cytotoxicity, and better solubility in water. − In this work, C-dots were synthesized from citric acid (CA) and o -phenylenediamine ( o -OPD). The synthesized C-dots and presynthesized nickel oxide nanoparticles were used as precursors for the synthesis of nickel oxide composites of C-dot nanomaterials.…”