Synthesis and Enhanced Photocatalytic Activity of Zinc Oxide‐Based Nanoparticles and Its Antibacterial Activity

Ragunathan, R.; Velusamy, Sampathkumar; Nallasamy, Jothi Lakshmi; Shanmugamoorthy, Manoj; Johney, Jesteena; Veerasamy, Senthilkumar; Gopalakrishnan, Dineshkumar; Nithyanandham, Muralimohan; Balamoorthy, Dhivya; Velusamy, Prabu

doi:10.1155/2022/3863184

Cited by 17 publications

(7 citation statements)

References 24 publications

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“…The cultivation of microalgae was done in small scale in mini tanks at a temperature of 30°C [14]. The algal suspensions were homogenized at the end of the culture cycle in order to disintegrate the cells of the algae and to give an ease for the extraction of oil.…”

Section: Methodsmentioning

confidence: 99%

Extraction of biodiesel from wastewater using microalgae Chlorella Vulgaris

2022

Global NEST: The International Journal

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<p>An experimental research on production of biodiesel from lipids of chlorella vulgaris has been done through transesterification reaction process. The series of chlorella vulgaris cultures has been carried out and the optimum growth time was determined. The biodiesel synthesis is processed by two steps i.e., isolation of chlorella vulgaris lipids and the synthesis of biodiesel from lipids. The objective of the study was to develop a simultaneous waste water treatment system and the production of renewable energy by utilizing the algal growth. Biofuel batch scale experiments with 10% and 15% dilution of municipal waste water were carried out in this study. The total lipid content of algal biomass ranged from 7.5 to 28.5%. The approximate proportions of chloroform, methanol and water in the upper phase was found to be in the ratio of 3:48:47 by volume and the lower phase mixture proportion was found to be 86:14:1. The concentration of biomass reached a maximum value of 920 mg/L measured in terms of VSS. The nutrient removal, which was achieved to nearly 100% weight of biodiesel yield per biomass of chlorella vulgaris, was 49.7%. The viscosity values and heat of combustion of the biodiesel were 1.14 g/cm3 and 42.50 KJ/g respectively.</p>

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Section: Methodsmentioning

confidence: 99%

Extraction of biodiesel from wastewater using microalgae Chlorella Vulgaris

2022

Global NEST: The International Journal

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“…From the graph, it is clear that the zone of inhibitions gets increased with the increase in the concentration of ZnO Nanoparticles which in turn, makes the higher concentrations of synthesised nanoparticles to have a better antibacterial activity. Also the gram positive bacteria namely Escherichia Coli and Salmonella Typhi have showed better growth comparing to the other gram-positive and gram-negative bacteria [37,38].…”

Section: Figure -9 Inhibition Zones Comparison Chartmentioning

confidence: 97%

GREEN SYNTHESIS AND CHARACTERISATION OF ZnO NANOPARTICLES FROM MANIHOT ESCULENTA (CASSAVA) PEEL AND THEIR ANTIBACTERIAL STUDY

2022

Global NEST: The International Journal

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<p>A technique for green manufacturing of zinc oxide based nanoparticles utilising cassava peel has been approached in this research for antibacterial investigation. Especially, the cassava peel is an agro waste from starch and food processing industries and the extract of Cassava peel is used for synthesising the zinc oxide nanoparticles (ZnO-NPs). The peel based zinc oxide nanoparticles were synthesized using bioreduction method. The plasmon peak from UV–Visible spectroscopy is observed at 380 nm, while the XRD shows an average crystallite size of 67.31nm with hexagonal structure and also the stability of bio synthesised nanoparticles are confirmed by FTIR study. Additionally, FESEM confirms the structure is found to be spherical whereas Zeta potential analysis has confirmed the nanoparticles have a stable and well-dispersed form. Furthermore, the anti bacterial study against bio synthesized ZnO-NPs is carried out for both gram positive and gram negative bacteria. Therefore, the results proved that the bacteria are found to be more active against the synthesized nanoparticles.</p>

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“…They that ZnONPs, fabricated using of B. tomentosa leaf extract, showed a significant inhibition of P. aeruginosa. Moreover, other reports using ZnONPs also showed an antibacterial effect on Gram-positive and Gramnegative bacteria [18][19][20]. Besides that, nanomaterials can be encapsulated to increase their stability, shelf life, bioavailability and, controll the nanomaterials release [21].…”

Section: Introductionmentioning

confidence: 98%

Antibacterial effects of in situ zinc oxide nanoparticles generated inside the poly (acrylamide-co-hydroxyethylmethacrylate) nanocomposite

Pereyra¹,

Barbero²,

Acevedo³

et al. 2022

Nanotechnology

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The present work reports the antibacterial activity against P. aeruginosa of a nanocomposite made of zinc oxide nanoparticles dispersed in a poly(acrylamide-co-hydroxyethylmethacrylate) matrix (PAAm-Hema-ZnONPs). The in-situ synthesis of ZnONPs inside of the PAAm-Hema crosslinked network is described. Moreover, the physicochemical properties of the PAAm-Hema-ZnONPs nanocomposite are analyzed. The results confirm that the PAAm-Hema hydrogel provides an excellent scaffold to generate ZnONPs. The presence of ZnONPs inside the hydrogel was confirmed by UV-visible (band at 320 nm), by Infrared spectroscopy (peak at 470 cm-1), SEM, and TEM images. The presence of NPs in PAAm-Hema diminish the swelling percentage by 70 %, and the Young modulus by 33.7%, compared with pristine hydrogel. The 75 % of ZnONPs are released from the nanocomposite after 48 hours of spontaneous diffusion, allowing the use of the nanocomposite as an antibacterial agent. In vitro, the agar diffusion test presents an inhibition halo against P. aeruginosa bacteria 50 % higher than the unloaded hydrogel. Also, the PAAm-Hema-ZnONPs live/dead test shows 54 % of dead cells more than the hydrogel. These results suggest that the easy, one-step way generated composites can be used in biomedical applications as antimicrobial agents.

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Synthesis and Enhanced Photocatalytic Activity of Zinc Oxide‐Based Nanoparticles and Its Antibacterial Activity

Cited by 17 publications

References 24 publications

Extraction of biodiesel from wastewater using microalgae Chlorella Vulgaris

Extraction of biodiesel from wastewater using microalgae Chlorella Vulgaris

GREEN SYNTHESIS AND CHARACTERISATION OF ZnO NANOPARTICLES FROM MANIHOT ESCULENTA (CASSAVA) PEEL AND THEIR ANTIBACTERIAL STUDY

Antibacterial effects of in situ zinc oxide nanoparticles generated inside the poly (acrylamide-co-hydroxyethylmethacrylate) nanocomposite

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