Effect of Ag and Au doping on the photocatalytic activity of TiO2 supported on textile fibres

2008 ◽  
Vol 1077 ◽  
Author(s):  
Mohammed Jasim Uddin ◽  
Federico Cesano ◽  
Domenica Scarano ◽  
Silvia Bordiga ◽  
Adriano Zecchina
Keyword(s):  
Thin Films ◽  
Light Exposure ◽  
Sol Gel ◽  
Tio2 Thin Films ◽  
Simple Method ◽  
Purple Colour ◽  
Cotton Fibres ◽  
Vis Spectroscopy ◽  
Cotton Textiles ◽  
Grey Colour

ABSTRACTA simple method to develop TiO2, Ag or Au-doped TiO2 thin films on cotton textiles for advanced applications, is reported. The homogeneous TiO2 thin films have been deposited on cotton textiles by using sol-gel method at low temperature (100° C), whereas Ag and Au nanoparticles were then deposited on the pre-existent TiO2 films by photoreduction. The Ag/TiO2 covered cotton fibres show multichromic behaviour (grey colour under visible light and brown colour upon ultraviolet light exposure) as well as photoactivity. The Au-TiO2 film coated the cotton textile produces a purple colour with excellent self cleaning properties. The original and treated fibres have been characterized by several techniques (SEM, HRTEM, FTIR, Raman, UV–vis spectroscopy and XRD).

Synthesis, Properties, and Applications of Special Substrates Coated by Titanium Dioxide Nanostructured Thin Films via Sol-Gel Process

2011 ◽  
pp. 246-279
Author(s):  
Hamid Dadvar ◽  
Farhad E. Ghodsi ◽  
Saeed Dadvar
Keyword(s):  
Thin Films ◽  
Titanium Dioxide ◽  
Sol Gel ◽  
Precursor Solution ◽  
Tio2 Thin Films ◽  
Simple Method ◽  
Nanostructured Thin Films ◽  
Precursor Material ◽  
Synthesis Properties ◽  
Antibacterial Surfaces

In this chapter, the sol-gel made titanium dioxide nanostructured thin films deposited on special substrates such as glasses, mica, steels, textiles, fibers, and other organic/inorganic substrates were reviewed. Through this review, several distinctive properties such as optical, electrical, photocatalytic, morphological, and mechanical properties of TiO2 nanostructured thin films were described. Also, a wide range of practical application of TiO2 nanostructured thin films such as dye-sensitised solar cells, optical coatings, humidity and gas sensors, selfcleaning, dielectric, and antibacterial surfaces were discussed in details. Dip and spin coating techniques were demonstrated as suitable methods for deposition of thin films. It has been shown that properties of such films can be affected by type of coating technique, stabilizer, precursor material, solvents, pH and viscosity of precursor solution, aging, and etc. Finally, Successive Interference Fringes Method (SIFM) was presented as a simple method for the determination of optical constants and thickness of TiO2 thin films from single transmission measurements.

Synthesis, Properties, and Applications of Special Substrates Coated by Titanium Dioxide Nanostructured Thin Films via Sol-Gel Process

2014 ◽  
pp. 218-250
Author(s):  
Hamid Dadvar ◽  
Farhad E. Ghodsi ◽  
Saeed Dadvar
Keyword(s):  
Thin Films ◽  
Titanium Dioxide ◽  
Sol Gel ◽  
Precursor Solution ◽  
Tio2 Thin Films ◽  
Simple Method ◽  
Nanostructured Thin Films ◽  
Precursor Material ◽  
Synthesis Properties ◽  
Antibacterial Surfaces

In this chapter, the sol-gel made titanium dioxide nanostructured thin films deposited on special substrates such as glasses, mica, steels, textiles, fibers, and other organic/inorganic substrates were reviewed. Through this review, several distinctive properties such as optical, electrical, photocatalytic, morphological, and mechanical properties of TiO2 nanostructured thin films were described. Also, a wide range of practical application of TiO2 nanostructured thin films such as dye-sensitised solar cells, optical coatings, humidity and gas sensors, selfcleaning, dielectric, and antibacterial surfaces were discussed in details. Dip and spin coating techniques were demonstrated as suitable methods for deposition of thin films. It has been shown that properties of such films can be affected by type of coating technique, stabilizer, precursor material, solvents, pH and viscosity of precursor solution, aging, and etc. Finally, Successive Interference Fringes Method (SIFM) was presented as a simple method for the determination of optical constants and thickness of TiO2 thin films from single transmission measurements.

Electrical Properties of Nanostructured Titanium Dioxide Thin Films Prepared by Sol-Gel Spin-Coating Method

2011 ◽  
Vol 312-315 ◽  
pp. 1027-1031
Author(s):  
Mohd Noor Asiah ◽  
Mat Zain Basri ◽  
Mohamad Rusop
Keyword(s):  
Thin Films ◽  
Titanium Dioxide ◽  
Electrical Properties ◽  
Spin Coating ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Tio2 Thin Films ◽  
Nanostructured Titanium ◽  
Annealing Temperatures ◽  
Vis Spectroscopy

This paper investigated the electrical properties of nanostructured Titanium Dioxide (TiO2) thin films prepared by the sol-gel method at different annealing temperatures. The precursor used was Titanium (IV) butoxide at concentration of 0.4 M. The TiO2 thin films were deposited on the glass and silicon substrates by using the spin coating technique. The influence of annealing temperatures on the electrical, structural, surface morphology and optical properties of the films were characterized by I-V measurement, X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and UV-Vis Spectroscopy, respectively. It was found that the electrical properties of TiO2¬ thin films were changed due to the changes of annealing temperatures. As the annealing temperatures rises, the resistivity of the film found to be decreased. The result also shows that films which does not applied annealing temperature called as deposited were found to be amorphous while the films with annealing temperature T = 350oC and above became crystalline structure. The anatase phase can be obtained at annealing temperatures from T = 350oC up to T = 500oC.

Comparison between the optical and surface properties of TiO2 and Ag/TiO2 thin films prepared by sol-gel process

2011 ◽  
Vol 1352 ◽  
Author(s):  
Marcelo M. Viana ◽  
Nelcy D. S. Mohallem
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Refraction Index ◽  
Titanium Isopropoxide ◽  
X Ray Diffraction ◽  
Tio2 Thin Films ◽  
Force Microscopy ◽  
Atomic Force ◽  
Vis Spectroscopy ◽  
Sol Gel Process

ABSTRACTColloidal precursor solutions, obtained from a mixture of titanium isopropoxide, isopropyl alcohol and silver nitrate, were used to fabricate amorphous TiO2 and Ag/TiO2 thin films by sol-gel process. The films were deposited on borosilicate substrates, which were heated at 400 °C for 30 minutes and cooled rapidly to the formation of amorphous coatings. The films were investigated by X-ray diffraction, scanning electron microscopy, atomic force microscopy and UV-vis spectroscopy. The thickness, roughness, refraction index, and particle size of the TiO2 and Ag/TiO2 films were determined and compared. Finally, hydrophobic-hydrophilic property was evaluated to the thin films produced.

scholarly journals Synthesis of TiO2 Thin Films Nanoparticles with Different Layers using Simple Sol-Gel Method

2021 ◽  
pp. 4425-4429
Author(s):  
Rajaa Obayes Abdulsada ◽  
Thamir A.A. Hassan
Keyword(s):  
Thin Films ◽  
Solar Cell ◽  
Spin Coating ◽  
Sol Gel ◽  
Flat Glass ◽  
Morphological Properties ◽  
Tio2 Thin Films ◽  
Simple Method ◽  
Glass Substrates ◽  
Tio2 Gel

   In this study, titanium dioxide (TiO2 (are synthesized by sol– gel simple method. Thin films of sol, gel, and sol- gel on relatively flat glass substrates are applied with Spin coating technique with multilayers. The optical and morphological properties (studied using AFM) of TiO2 layers show good properties, with particles diameters less than 4 nm for all prepared samples and have maximum length 62 nm for TiO2 gel thin films of three layers. The results show low roughness values for all films especially for 4 layers sol (8.37nm), which improve the application in dye sensitive solar cell (DSSc)         .  

Effect of Deposition Voltage on Microstructure and Optical Properties of TiO2 Thin Film via Electrophoretic Deposition

2012 ◽  
Vol 576 ◽  
pp. 586-589 ◽  
Author(s):  
Saber Ghannadi ◽  
H. Abdizadeh ◽  
M. Golobostanfard
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Electrophoretic Deposition ◽  
Applied Voltage ◽  
Sol Gel ◽  
Visible Region ◽  
Diffraction Field ◽  
Tio2 Thin Films ◽  
Vis Spectroscopy ◽  
Titania Sol

In this study nanocrystalline anatase TiO2 thin films were prepared by electrophoretic deposition of titania sol at various applied voltages. The well-known sol-gel method was used to prepare the titania sol. The influence of applied voltage on the structure, morphology and optical properties of thin films has been characterized by X-ray diffraction, field emission scanning electron microscopy and UV-Vis spectroscopy. The results show that the thickness of the films formed on the substrate increases with increasing the applied voltage. However, with increasing the thickness of the films, the cracks increased and the transparency reduced in the visible region.

STRUCTURAL, OPTICAL PROPERTIES AND PHOTOCATALYTIC ACTIVITY OF NANOCRYSTALLINE TiO2 THIN FILMS DEPOSITED BY SOL-GEL SPIN COATING

2019 ◽  
Vol 7 (1) ◽  
pp. 28
Author(s):  
KOMARAIAH DURGAM ◽  
RADHA EPPA ◽  
REDDY M. V. RAMANA ◽  
KUMAR J. SIVA ◽  
R. SAYANNA ◽  
...  
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Photocatalytic Activity ◽  
Spin Coating ◽  
Sol Gel ◽  
Tio2 Thin Films ◽  
Nanocrystalline Tio2

Fe2O3 - TiO2 THIN FILMS PREPARED BY SOL-GEL METHOD

2011 ◽  
Vol 10 (2) ◽  
pp. 187-192 ◽  
Author(s):  
Ramona-Crina Suciu ◽  
Marcela Corina Rosu ◽  
Teofil Danut Silipas ◽  
Emil Indrea ◽  
Violeta Popescu ◽  
...  
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Tio2 Thin Films ◽  
Gel Method ◽  
Sol Gel Method

Nanostructured TiO2 thin films for DSSCs prepared by sol gel technique

2017 ◽  
Author(s):  
Siti Noraini Abu Bakar ◽  
Huda Abdullah ◽  
Kamisah Mohamad Mahbor
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Tio2 Thin Films ◽  
Nanostructured Tio2 ◽  
Gel Technique

scholarly journals Microstructure Evolution of Ag/TiO2 Thin Film

2021 ◽  
Vol 7 (1) ◽  
pp. 14
Author(s):  
Dewi Suriyani Che Halin ◽  
Kamrosni Abdul Razak ◽  
Mohd Arif Anuar Mohd Salleh ◽  
Mohd Izrul Izwan Ramli ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
...  
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Growth Rate ◽  
Synchrotron Radiation ◽  
Tio2 Thin Film ◽  
Sol Gel ◽  
Tio2 Thin Films ◽  
Contact Mode ◽  
X Ray ◽  
Radiation Imaging

Ag/TiO2 thin films were prepared using the sol-gel spin coating method. The microstructural growth behaviors of the prepared Ag/TiO2 thin films were elucidated using real-time synchrotron radiation imaging, its structure was determined using grazing incidence X-ray diffraction (GIXRD), its morphology was imaged using the field emission scanning electron microscopy (FESEM), and its surface topography was examined using the atomic force microscope (AFM) in contact mode. The cubical shape was detected and identified as Ag, while the anatase, TiO2 thin film resembled a porous ring-like structure. It was found that each ring that coalesced and formed channels occurred at a low annealing temperature of 280 °C. The energy dispersive X-ray (EDX) result revealed a small amount of Ag presence in the Ag/TiO2 thin films. From the in-situ synchrotron radiation imaging, it was observed that as the annealing time increased, the growth of Ag/TiO2 also increased in terms of area and the number of junctions. The growth rate of Ag/TiO2 at 600 s was 47.26 µm2/s, and after 1200 s it decreased to 11.50 µm2/s and 11.55 µm2/s at 1800 s. Prolonged annealing will further decrease the growth rate to 5.94 µm2/s, 4.12 µm2/s and 4.86 µm2/s at 2400 s, 3000 s and 3600 s, respectively.

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