Synthesis and Characterization of Nanocrystalline TiO2 Thin Films by Sol-Gel Dip Coating Method

2013 ◽  
Vol 678 ◽  
pp. 108-112 ◽  
Author(s):  
Narayanaswamy Gokilamani ◽  
N. Muthukumarasamy ◽  
Mariyappan Thambidurai
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
Tio2 Thin Films ◽  
Atomic Force ◽  
Coating Method ◽  
Nanocrystalline Titanium ◽  
Dip Coating Method

Nanocrystalline titanium dioxide (TiO2) thin films have been prepared by dip coating method. The TiO2 thin films have been coated on glass substrate and annealed at 400, 450 and 500° C respectively. The X- ray diffraction pattern shows that TiO2 nanocrystalline thin films are of anatase structure and the grain size is found to be in the range of 20-35 nm. The annealed films have been observed to be nanocrystalline in nature and the crystallinity has been observed to improve on annealing. The surface topography of the films has been studied using atomic force microscope. The optical properties have been studied using transmittance spectra. The band gap has been found to lie in the range of 3.70 to 3.83 eV depending on the annealing temperature.

scholarly journals Characteristics and optical properties of Fe3+ doped SiO2/TiO2 thin films prepared by the sol-gel dip-coating method

2013 ◽  
Vol 16 (1) ◽  
pp. 92-100
Author(s):  
Chien Mau Dang ◽  
Dam Duy Le ◽  
Tam Thi Thanh Nguyen ◽  
Dung Thi My Dang
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Sol Gel ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
Tio2 Thin Films ◽  
Water Contact ◽  
Glass Substrates ◽  
Coating Method ◽  
Dip Coating Method

In this study, we have successfully synthesized Fe3+ doped SiO2/TiO2 thin films on glass substrates using the sol-gel dip-coating method. After synthesizing, the samples were annealed at 5000C in the air for 1 hour. The characteristics and optical properties of Fe3+ doped SiO2/TiO2 films were then investigated by X-ray diffraction (XRD), ultraviolet-visible spectroscopy (UV-vis) and Fourier transform infrared spectroscopy (FT-IR). An antifogging ability of the glass substrates coated with the fabricated film is investigated and explained by a water contact angle under visible-light. The analyzed results also show that the crystalline phase of TiO2 thin films comprised only the anatase TiO2, but the crystalline size decreased from 8.8 to 5.9 nm. We also observed that the absorption edge of Fe3+- doped SiO2/TiO2 thin films shifted towards longer wavelengths (i.e. red shifted) from 371.7nm to 409.2 nm when the Fe3+-doped concentration increased from 0 to 1 % mol.

Characterization of Iron Oxide Nanoparticles for Sol-Gel Dip-Coating Method Prepared Thin Films

2013 ◽  
Vol 704 ◽  
pp. 275-280
Author(s):  
Janina Setina ◽  
Alona Gabrene ◽  
Inna Juhnevica ◽  
Gundars Mezinskis
Keyword(s):  
Thin Films ◽  
Iron Oxide ◽  
Iron Oxides ◽  
Sol Gel ◽  
Morphological Characteristics ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
Coating Method ◽  
Dip Coating Method ◽  
Dip Coating Technique

The paper describes two methods of syntheses of iron oxides, microstructure and morphology of magnetite nanoparticles. Nanocomposite thin films of SiO2/Fe3O4 have been prepared with sol-gel dip coating technique: dip-coating from SiO2/Fe3O4 sol and encapsulation magnetite between two SiO2 layers. Structural and morphological characteristics of iron oxides particles and prepared film were analyzed by X-Ray Diffraction, SEM, FTIR, DTA, AFM. AFM topography of surface and measurements of roughness has shown that using iron oxide encapsulation between two SiO2 layers to provide the even distribution of iron oxide, results as high quality films with low Rq values 1.5 2.7 nm.

Comparative study of multilayered ZnO/TiO2/ZnO and TiO2/ZnO/TiO2 thin films prepared by sol–gel dip coating method

2017 ◽  
Vol 28 (23) ◽  
pp. 17499-17504 ◽  
Author(s):  
M. I. Khan ◽  
Muhammad Saleem ◽  
K. A. Bhatti ◽  
Rabia Qindeel ◽  
Hayat Saeed Althobaiti ◽  
...  
Keyword(s):  
Thin Films ◽  
Comparative Study ◽  
Sol Gel ◽  
Dip Coating ◽  
Tio2 Thin Films ◽  
Coating Method ◽  
Dip Coating Method

Growth and Characterization of Iron Oxide Nanocrystalline Thin Films via Sol-Gel Dip Coating Method

2014 ◽  
Vol 50 (8) ◽  
pp. 1-4 ◽  
Author(s):  
Zohra Nazir Kayani ◽  
Erum Shahid Khan ◽  
Farhat Saleemi ◽  
Saira Riaz ◽  
Shahzad Naseem
Keyword(s):  
Thin Films ◽  
Iron Oxide ◽  
Sol Gel ◽  
Dip Coating ◽  
Coating Method ◽  
Dip Coating Method ◽  
Nanocrystalline Thin Films

scholarly journals Raman Spectroscopy and XRD investigation on TiO2 sol-gel dip coating thin films synthesizes with and without solvents

2018 ◽  
Vol 150 ◽  
pp. 04007 ◽  
Author(s):  
Shuhadah A. Yazid ◽  
Zulkifli Mohd. Rosli ◽  
Jariah Mohamad Juoi ◽  
Nur Dalilah Johari
Keyword(s):  
Thin Films ◽  
Raman Spectroscopy ◽  
Crystallite Size ◽  
Sol Gel ◽  
Dip Coating ◽  
X Ray Diffraction ◽  
Coating Films ◽  
Tio2 Sol ◽  
Coating Method ◽  
Dip Coating Method

TiO2 coating films were prepared by sol-gel dip coating method using TTiP precursors with and without ethanol as a medium to hydrolyze the HCl catalyst. The prepared samples of titanium dioxide (TiO2) coating were dried at 110°C for 30 minutes then heated at 500°C and 600°C for 1h and 3h respectively to study effect of annealing temperature and soaking time. The crystallinity of the TiO2 coating were identified by using X-ray Diffraction technique and crystallite size was calculated. Raman Spectroscopy also used as the confirmation of phases formation of TiO2 coating films. Crystallite size of TiO2 films were obtained at 12.35 nm, 17.29 nm for anatase, 21.71 nm, 28.95 nm for rutile and 2.19 nm for brookite. Thus, the establishment of the desired phases, crystallinity and grain size of TiO2 thin films sol-gel can be controlled and encouraging to explore as an effort toward producing a sustainable photocatalytic.

Preparation of Nanocrystalline Titanium Dioxide (TiO2) Thin Films by the Sol-Gel Dip Coating Method

2012 ◽  
Vol 16 ◽  
pp. 105-111 ◽  
Author(s):  
Raouf Mechiakh ◽  
R. Gheriani ◽  
R. Chtourou
Keyword(s):  
Thin Films ◽  
Titanium Dioxide ◽  
Sol Gel ◽  
Dip Coating ◽  
Treatment Temperature ◽  
Coating Method ◽  
Type Semiconductor ◽  
Nanocrystalline Titanium ◽  
Dip Coating Method ◽  
Titanium Dioxide Thin Films

Titanium dioxide thin films have been prepared by the sol–gel dip-coating method on an ITO substrate. The samples obtained were characterized by different experimental techniques: XRD, Raman, FTIR, spectroscopy of the electrochemical potential and SEM. The X-ray diffraction results showed that the TiO2 thin film obtained for a layer, after a temperature of annealing (400°C) and at the speeds of steeping between 2 and 10 cm∙s-1 was amorphous, and transformed into anatase–brookite at 0.6 cm∙s-1 for 400°C. The data of Raman spectroscopy is in good agreement with the DRX results. Observation by scanning electron microscope shows that the coating was transparent and homogeneous without any visual cracking over a wide area, and the increase in the treatment temperature did not affect the uniformity of the film. The interface of our layers to behaved like a n-type semiconductor.

Effect of annealing temperature on nanocrystalline TiO2 thin films prepared by sol–gel dip coating method

Optik ◽  
2013 ◽  
Vol 124 (23) ◽  
pp. 6201-6204 ◽  
Author(s):  
A. Ranjitha ◽  
N. Muthukumarasamy ◽  
M. Thambidurai ◽  
R. Balasundaraprabhu ◽  
S. Agilan
Keyword(s):  
Thin Films ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Dip Coating ◽  
Tio2 Thin Films ◽  
Nanocrystalline Tio2 ◽  
Coating Method ◽  
Dip Coating Method

Influence of Multi-Round Annealing Process on the Optical and Electrical Properties of Sol-Gel Derived TiO2-δ Films

2012 ◽  
Vol 465 ◽  
pp. 165-171
Author(s):  
Jin Ming Liu ◽  
Xiao Ru Zhao ◽  
Li Bing Duan ◽  
Xiao Jun Bai ◽  
Ning Jin ◽  
...  
Keyword(s):  
Thin Films ◽  
Oxygen Vacancies ◽  
Sol Gel ◽  
Dip Coating ◽  
Annealing Process ◽  
Visible Range ◽  
Tio2 Thin Films ◽  
Glass Substrates ◽  
Coating Method ◽  
Dip Coating Method

Anatase TiO2- thin films on glass substrates were prepared by sol-gel dip-coating method. We designed a multi-round annealing process which was under the air pressure of 5 Pa and then 5×10-2 Pa for one hour each at 550 °C, and such process was repeated for three times. The special designed annealing process can obviously improve the conductivity of the udoped TiO2- thin films. The minimum resistivity of the undoped TiO2- thin films reached 0.8 Ω cm after being treated by the multi-round annealing process. It was demonstrated that such annealing process was an effective way to increase the defects in TiO2- thin films such as oxygen vacancies. The average transmittances of the films were approximately 60~80% in the visible range with the forbidden gaps of 3.25~3.35 eV. After the multi-round annealing process, the optical forbidden gaps of the films became narrowed slightly, which might be also related to the defects introduced during the multi-annealing process.

Investigation on the Structural and Optical Properties of Nanocrystalline TiO2 Thin Films

2013 ◽  
Vol 678 ◽  
pp. 103-107 ◽  
Author(s):  
Arumugam Ranjitha ◽  
Natarajan Muthukumarasamy ◽  
Santhanam Agilan ◽  
Mariyappan Thambidurai ◽  
Rangasamy Balasundraprabhu ◽  
...  
Keyword(s):  
Thin Films ◽  
Sol Gel ◽  
Dip Coating ◽  
Band Gap Energy ◽  
Tio2 Thin Films ◽  
Nanocrystalline Tio2 ◽  
Structural Investigations ◽  
Force Microscopy ◽  
Coating Method ◽  
Dip Coating Method

Nanocrystalline TiO2 thin films were prepared by sol-gel dip coating method. The structural investigations were carried out using x-ray diffraction technique. Anatase TiO2 thin films with tetragonal phase were obtained and the grain size was observed to lie in the range of 21-25 nm. Analysis on the surface topography of prepared films have been carried out using atomic force microscopy (AFM). The band gap energy is calculated from the absorption spectra of TiO2 films and is found to lie in the range 3.3 to 3.7 eV.

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