Biosynthesis of TiO2 nanoparticles and their superior antibacterial effect against human nosocomial bacterial pathogens

Priyadarshini, S.; Mainal, Azizah; Sonsudin, Faridah; Yahya, Rosiyah; Alyousef, Abdullah A.; Arshad, Muhammad

doi:10.1007/s11164-019-03857-6

Cited by 30 publications

(20 citation statements)

References 38 publications

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“…36,68 To further explain the antibiolm abilities of the 100 kGy gamma-irradiated Co x Ni 1Àx Fe 2 O 4 /SiO 2 /TiO 2 ; x ¼ 0.9 nanocomposite, we propose a mechanism of action against biolm production by E. coli from SEM and EDX studies. 37, 71 The SEM images show the bacterial cell morphologies before and aer treatment with 100 kGy gamma irradiation of the prepared nanocomposite. In the control (non-treated bacterial cells), bacterial cultures were normally developed and had denite normal cellular morphology with a normal cell exterior and compressed biolm production, as displayed in Fig.…”

Section: Methodsmentioning

confidence: 99%

Merits of photocatalytic and antimicrobial applications of gamma-irradiated Co_xNi_1−xFe₂O₄/SiO₂/TiO₂;x= 0.9 nanocomposite for pyridine removal and pathogenic bacteria/fungi disinfection: implication for wastewater treatment

et al. 2020

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Section: Methodsmentioning

confidence: 99%

Merits of photocatalytic and antimicrobial applications of gamma-irradiated Co_xNi_1−xFe₂O₄/SiO₂/TiO₂;x= 0.9 nanocomposite for pyridine removal and pathogenic bacteria/fungi disinfection: implication for wastewater treatment

et al. 2020

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“…However, these methods involve the use of expensive instrumentation, high energy consumption and hazardous chemicals, resulting in severe health defects to humans and the environment [ 19 ]. To overcome these issues, biosynthesis has been widely applied in recent decades for its eco-friendly synthesis procedures [ 20 ]. Compared to conventional heating, microwave irradiation is a promising method because of the homogenous heating, energy efficiency and rapid rate of nanoparticle formation in conjugation with the plant extract [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Facile In-Situ Fabrication of a Ternary ZnO/TiO2/Ag Nanocomposite for Enhanced Bactericidal and Biocompatibility Properties

et al. 2021

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This paper presents for the first time a successful fabrication of ternary ZnO/TiO2/Ag nanocomposites consisting of zinc oxide (ZnO), titania (TiO2) and silver (Ag) nanoparticles (NPs) synthesised using Morinda citrifolia fruit (MCF) extract. ZnONPs were synthesised using the co-precipitation method, and TiO2 and Ag were introduced into the precursor solutions under microwave irradiation to obtain ZnO/TiO2/Ag nanocomposites (NCs). This material demonstrated enhanced bactericidal effect towards bacterial pathogens compared to that of the binary TiO2/Ag, Ag and TiO2 alone. In vitro cytotoxicity results of the as-synthesised ZnO/TiO2/AgNCs on RAW 264.7 macrophages and A549 cell lines revealed a negative role in cytotoxicity, but contributed astoundingly towards antimicrobials as compared of Ag alone and binary Ag/TiO2. This study shows that the resultant ternary metal/bi-semiconductor nanocomposites may provide a therapeutic strategy for the eradication of bacterial pathogens without affecting the healthy mammalian cells.

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“…To clarify the antibiofilm capabilities of the nanocomposite, we attempted an activity mechanism against E. coli and C. tropicalis biofilms using SEM/EDX analysis 48 , 106 . SEM images revealed the shape of bacterial and yeast cells before and after nanocomposite treatment.…”

Section: Resultsmentioning

confidence: 99%

Carbon-dot-loaded CoxNi1−xFe2O4; x = 0.9/SiO2/TiO2 nanocomposite with enhanced photocatalytic and antimicrobial potential: An engineered nanocomposite for wastewater treatment

Elkodous

El-Sayyad

Youssry

et al. 2020

Sci Rep

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Water scarcity is now a serious global issue resulting from population growth, water decrease, and pollution. Traditional wastewater treatment plants are insufficient and cannot meet the basic standards of water quality at reasonable cost or processing time. In this paper we report the preparation, characterization and multiple applications of an efficient photocatalytic nanocomposite (Co x Ni 1−x Fe 2 O 4 ; x = 0.9/SiO 2 /TiO 2 /C-dots) synthesized by a layer-by-layer method. Then, the photocatalytic capabilities of the synthesized nanocomposite were extensively-studied against aqueous solutions of chloramine-T trihydrate. In addition, reaction kinetics, degradation mechanism and various parameters affecting the photocatalytic efficiency (nanocomposite dose, chloramine-T initial concentration, and reaction pH) were analyzed in detail. Further, the antimicrobial activities of the prepared nanocomposite were tested and the effect of UV-activation on the antimicrobial abilities of the prepared nanocomposite was analyzed. Finally, a comparison between the antimicrobial abilities of the current nanocomposite and our previously-reported nanocomposite (Co x Ni 1−x Fe 2 O 4 ; x = 0.9/SiO 2 /TiO 2 ) had been carried out. Our results revealed that the prepared nanocomposite possessed a high degree of crystallinity, confirmed by XRD, while UV–Vis. recorded an absorption peak at 299 nm. In addition, the prepared nanocomposite possessed BET-surface area of (28.29 ± 0.19 m 2 /g) with narrow pore size distribution. Moreover, it had semi-spherical morphology, high-purity and an average particle size of (19.0 nm). The photocatalytic degradation efficiency was inversely-proportional to chloramine-T initial concentration and directly proportional to the photocatalyst dose. In addition, basic medium (pH 9) was the best suited for chloramine-T degradation. Moreover, UV-irradiation improved the antimicrobial abilities of the prepared nanocomposite against E. coli , B. cereus , and C. tropicalis after 60 min. The observed antimicrobial abilities (high ZOI, low MIC and more efficient antibiofilm capabilities) were unique compared to our previously-reported nanocomposite. Our work offers significant insights into more efficient water treatment and fosters the ongoing efforts looking at how pollutants degrade the water supply and the disinfection of water-borne pathogenic microorganisms.

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Biosynthesis of TiO2 nanoparticles and their superior antibacterial effect against human nosocomial bacterial pathogens

Cited by 30 publications

References 38 publications

Merits of photocatalytic and antimicrobial applications of gamma-irradiated Co_xNi_1−xFe₂O₄/SiO₂/TiO₂;x= 0.9 nanocomposite for pyridine removal and pathogenic bacteria/fungi disinfection: implication for wastewater treatment

Merits of photocatalytic and antimicrobial applications of gamma-irradiated Co_xNi_1−xFe₂O₄/SiO₂/TiO₂;x= 0.9 nanocomposite for pyridine removal and pathogenic bacteria/fungi disinfection: implication for wastewater treatment

Facile In-Situ Fabrication of a Ternary ZnO/TiO2/Ag Nanocomposite for Enhanced Bactericidal and Biocompatibility Properties

Carbon-dot-loaded CoxNi1−xFe2O4; x = 0.9/SiO2/TiO2 nanocomposite with enhanced photocatalytic and antimicrobial potential: An engineered nanocomposite for wastewater treatment

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Biosynthesis of TiO2 nanoparticles and their superior antibacterial effect against human nosocomial bacterial pathogens

Cited by 30 publications

References 38 publications

Merits of photocatalytic and antimicrobial applications of gamma-irradiated CoxNi1−xFe2O4/SiO2/TiO2;x= 0.9 nanocomposite for pyridine removal and pathogenic bacteria/fungi disinfection: implication for wastewater treatment

Merits of photocatalytic and antimicrobial applications of gamma-irradiated CoxNi1−xFe2O4/SiO2/TiO2;x= 0.9 nanocomposite for pyridine removal and pathogenic bacteria/fungi disinfection: implication for wastewater treatment

Facile In-Situ Fabrication of a Ternary ZnO/TiO2/Ag Nanocomposite for Enhanced Bactericidal and Biocompatibility Properties

Carbon-dot-loaded CoxNi1−xFe2O4; x = 0.9/SiO2/TiO2 nanocomposite with enhanced photocatalytic and antimicrobial potential: An engineered nanocomposite for wastewater treatment

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Merits of photocatalytic and antimicrobial applications of gamma-irradiated Co_xNi_1−xFe₂O₄/SiO₂/TiO₂;x= 0.9 nanocomposite for pyridine removal and pathogenic bacteria/fungi disinfection: implication for wastewater treatment

Merits of photocatalytic and antimicrobial applications of gamma-irradiated Co_xNi_1−xFe₂O₄/SiO₂/TiO₂;x= 0.9 nanocomposite for pyridine removal and pathogenic bacteria/fungi disinfection: implication for wastewater treatment