Green and gentle synthesis of Cu₂O nanoparticles using lignin as reducing and capping reagent with antibacterial properties

Abstract

In this work, Cu 2 O nanoparticles of a particular shape were prepared by an ecofriendly, gentle and low-cost synthetic method using lignin as a reducing and capping reagent. Structure and morphology of the Cu 2 O nanoparticles were characterised by high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction (XRD) and Fourier-transform (FT-IR) spectroscopy. The results established that Cu 2 O nanoparticles coated by lignin showed a particular shape. The morphology of Cu 2 O nanoparticles presented as some loose accumulation of particles just like broccoli, and the particle size range was between 100 and 200 nm. And, the XRD revealed the structure of crystalline of the Cu 2 O nanoparticles. In addition, the sterilisation of Cu 2 O nanoparticles on Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli) was also investigated. The Cu 2 O nanoparticles showed effective bactericidal activity against E. coli and S. aureus. The antibacterial rate could get 100% after 30 min with 4.0 g/L Cu 2 O nanoparticles. Furthermore, the Cu 2 O nanoparticles were confirmed to have low cytotoxicity.

Synthesis and Impregnation of Copper Oxide Nanoparticles on Activated Carbon through Green Synthesis for Water Pollutant Removal

“…It was found CuO nanoparticles sizes of 5 to 10 nm; 20 to 30 nm; 48 nm; 140 nm and 544 nm obtained by green method using leaves extract of Gloriosa superba, Calotropis gigantea, Tabernaemontana divaricate, Carica papaya and Ficus religiosa, respectively, as reducing agents 6,54-57 . Whereas Cu 2 O nanoparticles sizes were 30 to 50 nm; 60-80 nm and 100-200 nm, using as reducing agents of nanoparticles leaves extract of Arachis hypogaea L., Tridax procumbens and lignin, respectively 5,58,59 .…”

Synthesis, Characterizations and Antimicrobial Activity of Cuprous Oxide (Cu2O) Nanoparticles

“…P-type semiconductor [1] Cu 2 O NPs have gained huge attention in scientific society due to captivating properties such as high critical temperature superconductors [1], direct bandgap of 2.2 eV [2], antimicrobial activity [1], low toxicity [3], photocatalytic activity [4], low cost and most abundant source materials [2], etc. Because of such practically applicable properties, Cu 2 O nanoparticles have been broadly studied in the various application fields like batteries [1], catalysis [5], gas sensor, biosensors [2], magnetic storage devices [6], medical, antifouling coating [6], photo¬voltaic and photocatalytic degradation of most of the organic pollutants [3,7].…”

“…Because of such practically applicable properties, Cu 2 O nanoparticles have been broadly studied in the various application fields like batteries [1], catalysis [5], gas sensor, biosensors [2], magnetic storage devices [6], medical, antifouling coating [6], photo¬voltaic and photocatalytic degradation of most of the organic pollutants [3,7]. Cu 2 O nanoparticles have excellent optical, physical, electrical, magnetic, and biological properties compared to the bulk and microparticles because of the large surface area to volume ratio [4,8]. These novel properties are strongly related to the synthetic processes [4] and there are numerous synthesis techniques like mechanical milling, vacuum vapor deposition, pulsed laser ablation, and pulsed wire discharge, microemulsion techniques, wet-chemistry route, electrochemical, sonochemical, microwaveassisted, thermal decomposition and hydrothermal methods, liquid hydrolysis, etc [1][2][3][4][5][6][7][8].…”

“…Cu 2 O nanoparticles have excellent optical, physical, electrical, magnetic, and biological properties compared to the bulk and microparticles because of the large surface area to volume ratio [4,8]. These novel properties are strongly related to the synthetic processes [4] and there are numerous synthesis techniques like mechanical milling, vacuum vapor deposition, pulsed laser ablation, and pulsed wire discharge, microemulsion techniques, wet-chemistry route, electrochemical, sonochemical, microwaveassisted, thermal decomposition and hydrothermal methods, liquid hydrolysis, etc [1][2][3][4][5][6][7][8]. Among all those synthesizes methods, chemical co-precipitation method is superior because of following advantages as it can be performed even in room temperature and pressure, it is inexpensive, and also not required specialized equipment and organic solvents in the…”

Facile synthesis and antibacterial applications of cuprous oxide/bovine serum albumin hierarchical nanocomposite particles

“…Because of the high accuracy and efficiency of biomineralization, some biomolecules have been used as capping and stabilizing agents during the synthesis of Cu 2 O [23,24]. However, the structure-directing mechanism was not studied in detail in the previous researches.…”