Antibacterial activity and antistatic composites of polyester/Ag-SiO2 prepared by a sol-gel method

2011 ◽  
Vol 121 (4) ◽  
pp. 2193-2201 ◽  
Author(s):  
Chin-San Wu ◽  
Hsin-Tzu Liao
Keyword(s):  
Antibacterial Activity ◽  
Sol Gel ◽  
Gel Method ◽  
Sol Gel Method

Synthesis Photocatalytic TiO2/ZnO Nanocomposite and Investigation through Anatase, Wurtzite and ZnTiO3 Phases Antibacterial Behaviors

2018 ◽  
Vol 51 ◽  
pp. 69-77 ◽  
Author(s):  
Hanif Mohammadi ◽  
Mohammad Ghorbani
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Antibacterial Activity ◽  
Uv Light ◽  
Sol Gel ◽  
Molar Ratio ◽  
Plate Count ◽  
Gel Method ◽  
Sol Gel Method ◽  
E Coli

Titanium dioxide is prepared by sol gel method from titanium tetraisopropoxide (TTIP) as precursor and likewise zinc oxide is prepared by sol gel method from zinc acetate dehydrate (ZAD) as precursor. The composite sols are prepared in three different molar ratios 90TiO2:10ZnO, 70TiO2:30ZnO and 50TiO2:50ZnO. Thin film deposition is carried out by dip coating technique. Crystal structure, surface morphology and photocatalytic activity of the prepared nanocomposite thin films are investigated. The antibacterial activity of the prepared nanocomposite thin film against E-coli ATCC 25922 bacteria is examined by placing the thin film in standard aqueous E-coli medium under UV light for 1, 2, 3 and 4 hours and then counting the bacteria with Standard Plate Count Agar (SPC) technique. The prepared thin films have shown strong antibacterial activity in the presence of UV light and by increasing the ZnO molar ratio from 10 to 50, antibacterial activity of the thin films decreases because of decreases in the anatase phase of the TiO2. In the dark conditions by increasing the molar ratio of ZnO, the antibacterial activity of the thin films increases and this phenomenon is related to increasing the zinc ions in the thin films.

scholarly journals Preparation of Nano Titanium Dioxide Using the Sol-Gel Method to Use in Friendly Environment Coatings

2021 ◽  
Vol 8 (2) ◽  
pp. 21-27
Author(s):  
Abeer Abd Saleh ◽  
Quraish Abbas ◽  
Seenaa Ibraheim ◽  
Ibrahim Muhammed ◽  
Mayes Sameer Hameed ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Titanium Dioxide ◽  
Tio2 Nanoparticles ◽  
Titanium Dioxide Nanoparticles ◽  
Sol Gel ◽  
Hardness Test ◽  
Weather Conditions ◽  
Gel Method ◽  
Sol Gel Method ◽  
E Coli

In this research, preparation of titanium dioxide nanomaterial (TiO2) using sol-gel method was achieved. 2.5 g weight of the titanium dioxide nanoparticles were added to the local paint using the casting method. Thin films were prepared by drop casting the paint onto the surface of pre-prepared samples, then several tests were carried out including adhesion test, hardness test (Shore B), brightness and whiteness, friction test, contact angle, and antibacterial activity. The nanomaterial at a percentage of 12% showed the best results when it was added to the paint. These results include adhesion strength, hardness strength, and exposing to weather conditions of temperature, and humidity. The adhesive strength increased when adding the nanomaterial from 112 to 139 before exposure to the weather and from 58 to 108 after exposure. The hardness also increased from 77.9 to 86.5 before exposure to the surrounding environment and from 94.2 to 96.8 after exposure. In addition, the paint with TiO2 nanoparticles exhibited antibacterial activity against two types of bacteria Escherichia coli (E. coli), staphylococcus aurous (S. aurous) and antifungal candida. Paint with TiO2 nanoparticles is more efficient as antibacterial agents with E. coli as compared with S. aurous and candida.

Synthesis, Characterization and Antibacterial Activity of ZnO Nanoparticles of Different Morphology

2012 ◽  
Vol 585 ◽  
pp. 154-158 ◽  
Author(s):  
Sulaxna Sharma ◽  
Devendra Naik ◽  
Vijaya Agarwala
Keyword(s):  
Antibacterial Activity ◽  
Zno Nanoparticles ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Zinc Nitrate ◽  
Nitrate Hexahydrate ◽  
Zone Of Inhibition ◽  
Gel Method ◽  
Sol Gel Method ◽  
Fesem Micrographs

Nanometric zinc oxide was prepared by sol-gel method using two different capping agents e.g., ethylene diamine (EDA) and citric acid (CAM) in different solvents. Nanorods of ZnO was prepared by sol-gel method using zinc nitrate hexahydrate (1M). The as-synthesized samples were characterized using XRD, FESEM-EDAX, TG/DTA techniques. FESEM micrographs suggest that the formation of nanorods of ZnO takes place for EDA and CAM in MeOH after calcination at 150 °C and 170 °C, respectively for 12h. The antibacterial activity tests (also known as plus-minus tests) were done by allowing bacteria to grow normally in laboratory conditions, and also by subjecting to ZnO nanoparticles in the powder form. On comparison of the above two Petri plates, the presence of a zone of inhibition indicates the antibacterial nature, which would have not existed if the bacteria did not experience any adverse effects by the presence of the ZnO nanorods. In the present study, the activity tested against Escherichia coli ATCC 25922 (gram-negative) Micrococcus leuteus and Bacillus subtilis (gram-positive) the results suggest the selective activity of the nanoparticles against these species.

scholarly journals Synthesis of Bi0.5Li0.5TiO3 Nanoparticles by Sol-Gel Method for Photocatalytic Methylene Blue Degradation and Antibacterial Activity

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Thanh T. Hai Le ◽  
Bao Quoc Phung ◽  
Dung Duc Dang
Keyword(s):  
Methylene Blue ◽  
Antibacterial Activity ◽  
Sol Gel ◽  
Advanced Characterization ◽  
Kinetic Rate Constant ◽  
Kinetic Rate ◽  
Methylene Blue Degradation ◽  
Gel Method ◽  
Sol Gel Method ◽  
E Coli

Facile synthesis of nanomaterials for advanced characterization and application is gaining interest from many researchers. In this study, Bi0.5Li0.5TiO3 nanoparticles were synthesized through the sol-gel method. The photocatalytic activity of the synthesized Bi0.5Li0.5TiO3 was investigated for degradation of methylene blue (MB) under UV irradiation. A photocatalytic efficiency of 74% was found at 150 min when the degradation was performed in the basic media, and the kinetic rate constant was calculated equal to 0.0093 min-1. The antibacterial activity of Bi0.5Li0.5TiO3 nanoparticles was evaluated against E. coli, and the results showed considerable efficiency.

scholarly journals WO3-Doped TiO2Coating on Charcoal Activated with Increase Photocatalytic and Antibacterial Properties Synthesized by Microwave-Assisted Sol-Gel Method

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Weerachai Sangchay
Keyword(s):  
Methylene Blue ◽  
Antibacterial Activity ◽  
Water Purification ◽  
Sol Gel ◽  
Antibacterial Properties ◽  
Antibacterial Activities ◽  
Gel Method ◽  
Sol Gel Method ◽  
E Coli ◽  
Microwave Assisted

WO3-doped TiO2coating on charcoal activated (CA) was prepared by microwave-assisted sol-gel method. The samples calcined at the temperature of 500°C for 2 h with a heating rate of 10°C/min were characterized by XRD, EDS, and SEM. The photocatalytic and antibacterial activities of WO3-doped TiO2coating on CA were investigated by means of degradation of a methylene blue (MB) solution and against the bacteriaE. coli, respectively. The effects of WO3concentration were discussed. The 1% WO3-doped TiO2coated CA seems to exhibit the higher photocatalytic and antibacterial activity than other samples. The WO3-doped TiO2coated on CA are expected to be applied as a photocatalyst for water purification.

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