scholarly journals A Study on the Characteristic and Antibacterial Activity of Ti3Ox Thin Films

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1416
Author(s):  
Endrika Widyastuti ◽  
Fu-Yang Xu ◽  
Chen-Tien Chiu ◽  
Jhen-Hau Jan ◽  
Jue-Liang Hsu ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Antibacterial Activity ◽  
Dye Degradation ◽  
Uv Light ◽  
Antibacterial Properties ◽  
Blue Dye ◽  
Tio2 Thin Films ◽  
E Coli ◽  
Sputtering Power

A pure Ti target in Ar/O2 gas mixture was used to synthesize Ti3Ox thin film on a glass substrate by Reactive High-Power Impulse Magnetron Sputtering (HiPIMS) under different sputtering power (2 and 2.5 kW). The influence of HiPIMS parameters on thin films’ structural, morphological, chemical composition, optical and photocatalytic, and antibacterial properties was investigated. In this study, Ti3Ox thin films can be synthesized using the HiPIMS method without the post-annealing process. Two co-existence phases (hexagonal Ti3O and base-centered monoclinic Ti3O5 phases) existed on the Ti3Ox films. It is found that the peak intensity of (006) Ti3O hexagonal slightly increased as the sputtering power increased from 2 to 2.5 kW. The Ti3Ox thin-film bandgap values were 3.36 and 3.50 eV for 2 and 2.5 kW, respectively. The Ti3Ox films deposited at 2.5 kW showed good photocatalytic activity under UV light irradiation, with a higher methylene blue dye degradation rate than TiO2 thin films. The antibacterial study on Ti3Ox thin films exhibited a high inhibition percentage against E. coli and S. aureus. This study demonstrates that Ti3Ox thin films can promote high photocatalytic and antibacterial activity.

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 Rapid and Scalable Wire-bar Strategy for Coating of TiO2 Thin-films: Effect of Post-Annealing Temperatures on Structures and Catalytic Dye-Degradation

Molecules ◽  
2020 ◽  
Vol 25 (7) ◽  
pp. 1683 ◽  
Author(s):  
P. Divya ◽  
S. Arulkumar ◽  
S. Parthiban ◽  
Anandarup Goswami ◽  
Tansir Ahamad ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Dye Degradation ◽  
Window Glass ◽  
Visible Range ◽  
Large Area ◽  
Tio2 Thin Films ◽  
Water Contact ◽  
Annealing Temperatures ◽  
Post Annealing

Titanium dioxide (TiO2) thin films were rapidly coated on Corning glass substrates from the precursor solution using the wire-bar technique at the room temperature and then post-annealed at 400, 500 and 600 °C for 1 h under atmospheric conditions. The structural, morphological, optical, wettability and photocatalytic properties of the films were studied. X-ray diffraction analysis confirmed the formation of an anatase TiO2 structure irrespective of the post-annealing temperatures. The optical transparency of the films in the visible range was measured to be > 70%. A water contact angle (WCA) of ~0° was observed for TiO2 thin-film, post-annealed at 400 °C and 500 °C. However, WCA of 40.3° was observed for post-annealed at 600 °C. The photocatalytic dye-degradation using post-annealed thin-film was investigated indicating a steady improvement in the dye-degradation percentage (from 24.3 to 29.4%) with the increase of post-annealing temperature. The demonstrated TiO2 thin-films deposited by wire-bar coating technique showed promises for the manufacturing of large-area cost-effective self-cleaning window glass.

INFLUENCE OF TITANIUM TETRAISOPROPOXIDE CONCENTRATION ON THE ANTIBACTERIAL ACTIVITY OF TiO2 THIN FILMS

2018 ◽  
Vol 25 (06) ◽  
pp. 1850111 ◽  
Author(s):  
ALI A. TAHA ◽  
SELMA M. H. AL-JAWAD ◽  
MOHAMMED M. SALIM
Keyword(s):  
Thin Films ◽  
Antibacterial Activity ◽  
Uv Light ◽  
Sol Gel ◽  
Precursor Solution ◽  
Titanium Tetraisopropoxide ◽  
Tio2 Thin Films ◽  
Force Microscopy ◽  
Xrd Patterns ◽  
Titanium Dioxide Thin Films

In this study, titanium dioxide thin films were successfully prepared via sol–gel method. Titanium tetraisopropoxide (TTIP) as a precursor solution was used to prepare different concentrations and deposited by spin coating. All prepared films were inspected by X-ray diffraction (XRD), atomic force microscopy (AFM) and scanning electron microscopy (SEM). XRD patterns show that all samples have anatase crystal structure. Transmittance spectra were measured by using UV-Vis spectrophotometer. The optical band gaps were 3.55, 3.62 and 3.78 eV for TTIP concentrations of 6, 6.3 and 6.6[Formula: see text]ml, respectively. Antibacterial activity of TiO2 films against S. aureus and E. coli was evaluated by international recognized test (JIS Z 2801). The test revealed incrementally increase in antibacterial activity of the films with TTIP concentrations activated by UV light.

Synthesis of TiO2 thin films on different substrates by chemical vapor deposition method

2021 ◽  
Vol 10 (4) ◽  
pp. 80-85
Author(s):  
Duc Ta Hong ◽  
Quang Phan Ngoc ◽  
Thang Vu Viet ◽  
Thang Le Minh
Keyword(s):  
Thin Films ◽  
Chemical Vapor Deposition ◽  
Methyl Orange ◽  
Vapor Deposition ◽  
Diffuse Reflectance Spectroscopy ◽  
Dye Degradation ◽  
Uv Light ◽  
Chemical Vapor ◽  
Chemical Vapor Deposition Method ◽  
Tio2 Thin Films

TiO2 thin films were synthesized by using Chemical Vapor Deposition (CVD) method on different substrates, such as glass, aluminium foil , and ceramic. The samples had been characterized by microscopy analysis, SEM, and EDS. The results show that TiO2 thin films were successfully fabricated and TiO2 nanocrystals with size of 50-100 nm loaded uniformly on surface of different substrates. The photocatalytic activities of all samples were investigated in photo-degradation of methyl orange (MO) under UV light irradiation and was followed by the UV-Vis diffuse reflectance spectroscopy, showing that the conversion of methyl orange achieved the highest percentage of 91% with TiO2 thin film synthesized on the ceramic substrate over 270 minutes of reaction. The hypothetical mechanism explaining this observation is that the surface morphology of ceramic plays a major role in the augmentation of MO molecules adsorption onto the surface of material, thus, improves the dye degradation process.

scholarly journals Antibacterial Activity of Visible Light-Activated TiO2 Thin Films with Low Level of Fe Doping

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Dan Meng ◽  
Xiuhua Liu ◽  
Yun Xie ◽  
Yang Du ◽  
Yong Yang ◽  
...  
Keyword(s):  
Thin Films ◽  
Raman Spectroscopy ◽  
Antibacterial Activity ◽  
Visible Light ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Antibacterial Properties ◽  
Dip Coating ◽  
Tio2 Thin Films ◽  
X Ray

Development of effective antibacterial visible light-activated photocatalytic materials in industries including wastewater treatment and food industry has attracted increasing attention. In this work, Fe-doped TiO2 thin films with different doping levels on a glass substrate were prepared by the sol-gel dip-coating method. The as-prepared films were characterized by Raman spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and atomic force microscope (AFM). Raman spectroscopy and XRD results show the crystalline phase of titanium dioxide was anatase, and the range of the crystal size for the films was 19.24–22.24 nm. XPS results indicate that iron was in the form of Fe3+ in Fe-doped TiO2 films. Regarding the antibacterial properties of TiO2 films, the order of antibacterial activity of TiO2 films was 0.1 at% Fe > 0.5 at% Fe > 1.0 at% TiO2 > bare TiO2 > 2.0 at% Fe > 3.45 at% Fe. 0.1 at% of Fe is the optimum dopant ratio related to antibacterial activity. 0.1 at% Fe-doped TiO2 film is highly efficient in inactivating E. coli under 3 h of visible light irradiation, and it remains efficient even in real dye waste water.

Electrical Property of TiO2 Thin Film Deposited by RF Sputtering

2007 ◽  
Vol 127 ◽  
pp. 221-226
Author(s):  
Kiyozumi Niizuma ◽  
Takahiro Hayakawa ◽  
Yoshio Utsushikawa
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Electrical Property ◽  
Tio2 Thin Film ◽  
Uv Light ◽  
Anatase Phase ◽  
Rf Sputtering ◽  
Light Irradiation ◽  
Tio2 Thin Films ◽  
Uv Light Irradiation

The authors investigated on the electrical property and the photo-catalytic activity of TiO2 thin films deposited in Ar+O2 atmosphere by RF magnetron sputtering. From the result of x-ray diffraction, the anatase phase was formed in TiO2 thin films. In TiO2 thin film deposited under a gas pressure of 3.0Pa, the contact angle of water showed 9 ﾟ, and the decomposition rate of Methylene Blue (measuring the absorbance of the reference light) showed -0.067 with UV light irradiation. Moreover, it revealed that the electric resistivity of TiO2 thin film deposited under the same conditions decreased from 8.0×103Ω･m to 1.4×10-2Ω･m with UV light irradiation.

Effect of Sputtering Power on Photocatalytic Activity of Thin TiO2 Films

2015 ◽  
Vol 814 ◽  
pp. 173-177
Author(s):  
Zhi Hong Luo ◽  
Jin Feng Leng ◽  
Wen Shuang He ◽  
De Jiang Hu
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Uv Light ◽  
Rutile Phase ◽  
Dislocation Network ◽  
Radio Frequency Magnetron Sputtering ◽  
Rutile Structure ◽  
Methyl Orange Degradation ◽  
Uv Light Irradiation ◽  
Sputtering Power

TiO2 thin films with outstanding photocatalysis can potentially be used for photocatalysis device in the field of environmental protection. TiO2 thin film (99.99%) was fabricated successfully by power metallurgy. The effect of sputtering power on TiO2 thin films by radio frequency magnetron sputtering was investigated. The results show that the higher sputtering power is beneficial for the growth of Rutile structure with superior photocatalysis. With the increasing of sputtering power, the rate of methyl orange degradation increases under UV light irradiation. The degradation rate of TiO2 thin film under sputtering power 75W and 165W is 40% and 80% respectively. This is attributed to the increase of the rutile phase with many defects and dislocation network under higher sputtering power.

scholarly journals Antibacterial Properties of Titanate Nanofiber Thin Films Formed on a Titanium Plate

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Mitsunori Yada ◽  
Yuko Inoue ◽  
Iwao Noda ◽  
Tomohiro Morita ◽  
Toshio Torikai ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Antibacterial Activity ◽  
Silver Nanoparticle ◽  
Antibacterial Properties ◽  
Sodium Titanate ◽  
Antibacterial Activities ◽  
Ultraviolet Rays ◽  
Titanium Plate ◽  
High Antibacterial Activity

A sodium titanate nanofiber thin film and a silver nanoparticle/silver titanate nanofiber thin film formed on the surface of a titanium plate exhibited strong antibacterial activities against methicillin-resistantStaphylococcus aureus, which is one of the major bacteria causing in-hospital infections. Exposure of the sodium titanate nanofiber thin film to ultraviolet rays generated a high antibacterial activity due to photocatalysis and the sodium titanate nanofiber thin film immediately after its synthesis possessed a high antibacterial activity even without exposure to ultraviolet rays. Elution of silver from the silver nanoparticle/silver titanate nanofiber thin film caused by the silver ion exchange reaction was considered to contribute substantially to the strong antibacterial activity. The titanate nanofiber thin films adhered firmly to titanium. Therefore, these titanate nanofiber thin film/titanium composites will be extremely useful as implant materials that have excellent antibacterial activities.

Antibacterial Properties of M3+-TiO2 Thin Films by RF Magnetron Co-Sputtering

2011 ◽  
Vol 236-238 ◽  
pp. 1789-1792
Author(s):  
Hui Jun Zhang ◽  
Ting Shan Liu ◽  
Jing Liang Cheng ◽  
Dian Zhong Wen ◽  
Akimitsu Hatta
Keyword(s):  
Thin Films ◽  
Antibacterial Activity ◽  
Thermal Treatment ◽  
Bactericidal Activity ◽  
Antibacterial Properties ◽  
Relative Number ◽  
Tio2 Thin Films ◽  
High Antibacterial Activity ◽  
Viable Cells ◽  
Number Of Bacteria

In order to study Antibacterial properties of nanometer TiO2thin films, nanometer M3+-TiO2films have been prepared on glass by RF magnetron co-sputtering method. The films were characterized by SEM, XRD, and AFM. The influence of Fe, Sb elements and calcination temperature on the films structure was investigated. The bactericidal activity for the bacteria cells was estimated by relative number of bacteria survived calculated from the number of viable cells which from colonies on the nutrient agar plates. The nanometer M3+-TiO2thin films exhibited a high antibacterial activity, which was enhanced with the increase of the temperature of thermal treatment and formation of anatase crystalline structure.

Preparation and Characterization of TiO2 Photocatalytic Thin Film Prepared by Sol-Gel Dip Coating

2012 ◽  
Vol 476-478 ◽  
pp. 2398-2402
Author(s):  
Jiao Jiao Wang ◽  
Kai Zheng ◽  
Christian Rüssel ◽  
Wen Liang
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Rhodamine B ◽  
Uv Light ◽  
Anatase Phase ◽  
Sol Gel ◽  
Rutile Phase ◽  
Dip Coating ◽  
High Photocatalytic Activity ◽  
Tio2 Thin Films

Titanium dioxide thin films have been prepared from tetrabutyl-orthotitanate solution and methanol as a solvent by sol-gel dip coating technique. The thermal properties of TiO2 gel were analyzed by thermogravimetry and differential thermal analysis (TG-DTA). Structural properties of TiO2 thin films at different heat treatment temperatures were analyzed by X-ray diffraction (XRD), Infrared Raman spectroscopy and scanning electron microscopy (SEM). The results show that the TiO2 thin films crystallize in anatase phase at 400 °C and the crystallinity of anatase phase was improved with increasing temperature. The TiO2 thin films crystallize into the anatase-rutile phase at 600 °C and further into the rutile phase at 800 °C. The photocatalytic performance of TiO2 film was tested for the degradation of 2×10-5 mol/L Rhodamine B. The degradation of Rhodamine B solutions reached 0.9×10-5 mol/L after irradiated for 8 h under UV light. The TiO2 thin film exhibited relatively high photocatalytic activity towards degrading Rhodamine B.

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