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

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.

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Effect of Precursor Sol Ageing on Sol-Gel Derived Ruthenium Oxide Thin Films

MRS Proceedings ◽

10.1557/proc-606-211 ◽

1999 ◽

Vol 606 ◽

Cited By ~ 4

Author(s):

S. Bhaskar ◽

S. B. Majumder ◽

P. S. Dobal ◽

R. S. Katiyar ◽

A. L. M. Cruz ◽

...

Keyword(s):

Thin Films ◽

Room Temperature ◽

Annealing Temperature ◽

Sol Gel ◽

Ruthenium Oxide ◽

Precursor Solution ◽

Silicon Substrates ◽

Solution Deposition ◽

Precursor Material ◽

Afm Analysis

AbstractIn the present work we have optimized the process parameters to yield homogeneous, smooth ruthenium oxide (RuO2) thin films on silicon substrates by a solution deposition technique using RuCl3.×.H2O as the precursor material. Films were annealed in a temperature range of 300°C to 700°C, and it was found that RuO2 crystallizes at a temperature as low as 400°C. The crystallinity of the films improves with increased annealing temperature and the resistivity decreases from 4.86µΩ-m (films annealed at 400°C) to 2.94pµΩ (films annealed at 700°C). Ageing of the precursor solution has a pronounced effect on the measured resistivities of RuO2 thin films. It was found that the measured room temperature resistivities increases from 2.94µΩ-m to 45.7µΩ-m when the precursor sol is aged for aged 60 days. AFM analysis on the aged films shows that the grain size and the surface roughness of the annealed films increase with the ageing of the precursor solution. From XPS analysis we have detected the presence of non-transformed RuCl3 in case of films prepared from aged solution. We propose, that solution ageing inhibits the transformation of RuCl3 to RuO2 during the annealing of the films. The deterioration of the conductivity with solution ageing is thought to be related with the chloride contamination in the annealed films.

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

MRS Proceedings ◽

10.1557/proc-1077-l07-20 ◽

2008 ◽

Vol 1077 ◽

Cited By ~ 2

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).

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

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.312-315.1027 ◽

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.

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

Surface Review and Letters ◽

10.1142/s0218625x18501111 ◽

2018 ◽

Vol 25 (06) ◽

pp. 1850111 ◽

Cited By ~ 5

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.

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

Iraqi Journal of Science ◽

10.24996/ijs.2021.62.11(si).23 ◽

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) .

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Sol-gel made titanium dioxide nanostructured thin films as gas-sensing materials for the detection of oxygen

Mendeleev Communications ◽

10.1016/j.mencom.2018.03.018 ◽

2018 ◽

Vol 28 (2) ◽

pp. 164-166 ◽

Cited By ~ 11

Author(s):

Vladimir G. Sevastyanov ◽

Elizaveta P. Simonenko ◽

Nikolay P. Simonenko ◽

Artem S. Mokrushin ◽

Vitaliy A. Nikolaev ◽

...

Keyword(s):

Thin Films ◽

Titanium Dioxide ◽

Gas Sensing ◽

Sol Gel ◽

Nanostructured Thin Films

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Study of anatase to rutile phase transition in titanium dioxide (TiO2) thin films by sol–gel dip-coating method

Acta Crystallographica Section A Foundations of Crystallography ◽

10.1107/s010876730709455x ◽

2007 ◽

Vol 63 (a1) ◽

pp. s241-s241

Author(s):

R. Mechiakh ◽

R. Bensaha

Keyword(s):

Thin Films ◽

Phase Transition ◽

Titanium Dioxide ◽

Sol Gel ◽

Rutile Phase ◽

Dip Coating ◽

Tio2 Thin Films ◽

Coating Method ◽

Dip Coating Method

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Enhancement of Photocatalytic Activities with Nanosized Polystyrene Spheres Patterned Titanium Dioxide Films for Water Purification

Catalysts ◽

10.3390/catal10080886 ◽

2020 ◽

Vol 10 (8) ◽

pp. 886 ◽

Cited By ~ 1

Author(s):

Hyeon Jin Seo ◽

Ji Won Lee ◽

Young Hoon Na ◽

Jin-Hyo Boo

Keyword(s):

Thin Films ◽

Titanium Dioxide ◽

Surface Area ◽

Water Purification ◽

Sol Gel ◽

Catalytic Efficiency ◽

Polystyrene Spheres ◽

Tio2 Thin Films ◽

Titanium Dioxide Films ◽

Photocatalytic Activities

For environmental applications, such as water and air purification utilizing photocatalysts, we synthesized patterned titanium dioxide (TiO2) thin films using polystyrene (PS) spheres. This was primarily done to enhance the surface area and photocatalytic activities. TiO2 thin films were deposited on silicon wafers attached to variously sized PS spheres via the spin coating method and were annealed at 600 °C. The processing step involved patterning and coating a TiO2 sol–gel. The photocatalytic performance was analyzed using an UV–visible spectrophotometer. Within 20 min, a high catalytic efficiency (98% removal) with a 20-time faster decomposition rate of the malachite green (MG) solution than that of the nonpatterned TiO2 was obtained from the patterned TiO2 with 400 nm sized PS due to the large surface area. In addition, the phenol in the water removed as much as 50% within 2 h with the same photocatalyst, which was expected to be one of the strong candidates to be applied to the next generation of photocatalysts for water purification.

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