The influence of an acid catalyst on the morphology, wettabillity, adhesion and chemical structure properties of TiO2 and ZrO2 sol–gel thin films

ABSTRACTSol/gel derived silica thin films were thermally treated in NH3 for four hours at temperatures up to 1300C. The films were analyzed by ellipsometry, X-ray photoelectron spectroscopy (XPS) and infrared spectroscopy (IR). Over 30 mol% nitrogen was incorporated in the film treated at 1300C. Using IR and XPS analyses, -NHx groups were found to be present after low temperature treatments, while nitrogen was incorporated in an oxynitride structure after the higher temperature treatments.

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Effects of Annealing Temperature and Coating Layers on Properties of ZnO Thin Films Prepared by Sol-Gel Immerse Technique

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.697.718 ◽

2016 ◽

Vol 697 ◽

pp. 718-722

Author(s):

Chao Du ◽

Yu Chun Zou ◽

Zhi Qing Chen ◽

Wen Kui Li ◽

Shan Shan Luo

Keyword(s):

Thin Films ◽

Optical Properties ◽

Annealing Temperature ◽

Sol Gel ◽

Zno Thin Films ◽

Electrical And Optical Properties ◽

Near Ir ◽

Diffraction Peaks ◽

Coating Layers ◽

Structure Properties

ZnO thin films is a kind of very potential semiconductor materials, due to their excellent chemical, electrical and optical properties. The effects of annealing temperature and coating layers on properties of ZnO thin films prepared by sol-gel immerse technique is studied in this work. The structure properties and optical properties were investigated by XRD, SEM and UV-Vis spectrophotometry respectively. It is found that the thin films were composed of better hexagonal wurtzite crystals with the c-axis preferred orientation by thermal annealing 550°C. With coating layers increasing from 2 layers to 8 layers, the intensity for all diffraction peaks were increased gradually, and the crystallite size of ZnO thin films is slightly increased. The transmittance of prepared thin films is over 80% in the visible-near IR region from 460 nm - 800 nm.

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Chemical structure evolution and orientation selection in sol-gel-prepared ferroelectric Pb(Zr,Ti)O3 thin films

Journal of Materials Research ◽

10.1557/jmr.2001.0342 ◽

2001 ◽

Vol 16 (9) ◽

pp. 2499-2504 ◽

Cited By ~ 29

Author(s):

L. Fè ◽

G. J. Norga ◽

D. J. Wouters ◽

H. E. Maes ◽

G. Maes

Keyword(s):

Thin Films ◽

Chemical Structure ◽

Temperature Scale ◽

Sol Gel ◽

Structure Evolution ◽

Orientation Selection ◽

Pzt Thin Films ◽

Pt Electrodes ◽

Sol Gel Process ◽

Real Temperature

We studied in detail the chemical structure evolution of Pb(Zr1−x, Tix)O3 (PZT) thin films on Pt electrodes during the initial thermal steps of their preparation using an alkoxide-based sol-gel process. Absorption-reflection Fourier transform infrared spectroscopy (AR-FTIRS) was used to monitor chemical reactions occurring in the films on a real temperature scale. We demonstrate that the chemical state of the pyrolyzed film strongly depends on pyrolysis conditions and can have a large effect on the orientation selection in the film. First, residual acetate groups, resulting from incomplete decomposition of the Pb acetate precursor, strengthen the (111) PZT texture component after crystallization. Second, OH bonds, which are seen to remain in the film after pyrolysis under specific conditions, are seen to strengthen the intensity of the PZT(100) reflection. Possible mechanisms behind these observations are discussed.

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Light Absorption and Structural Properties of TiO2-AgCl Thin Films Doped with Cu by Sol-Gel Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.488-489.14 ◽

2012 ◽

Vol 488-489 ◽

pp. 14-18

Author(s):

Weerachai Sangchay ◽

Lek Sikong ◽

Kalayanee Kooptarnond

Keyword(s):

Thin Films ◽

Light Absorption ◽

Diffuse Reflectance ◽

Diffuse Reflectance Spectroscopy ◽

Sol Gel ◽

Dip Coating ◽

Reflectance Spectroscopy ◽

Cu Doping ◽

Sol Gel Process ◽

Structure Properties

TiO2-AgCl thin films doped with Cu were prepared by sol-gel and coated on glass slide by dip coating process. The prepared thin films were synthesized at the temperature of 400 ◦C for 2 h with a heating rate of 10◦C/min. The microstructures of synthesized thin films were characterized by XRD, AFM and SEM. Finally, the light absorption property was evaluated by UV-vis diffuse reflectance spectroscopy. The results show all samples have the thickness in range of 200-250 nm and surfaces are dense with a large surface area. It was found that Cu doping has an effect on light absorption and structure properties of the synthesized thin films. It can be noted that TiO2-AgCl-5Cu thin films showed the highest light absorption (2.50%) under UV irradiation.

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Room temperature sensitivity of (SnO2–ZrO2) sol–gel thin films

Sensors and Actuators A Physical ◽

10.1016/s0924-4247(99)00278-2 ◽

2000 ◽

Vol 84 (1-2) ◽

pp. 76-80 ◽

Cited By ~ 6

Author(s):

M Soliman Selim

Keyword(s):

Thin Films ◽

Temperature Sensitivity ◽

Room Temperature ◽

Sol Gel ◽

Zro2 Sol

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Temperature stable Au nanoparticles embedded in Er3+ doped ZrO2 sol–gel thin films prepared by spin coating

Thin Solid Films ◽

10.1016/j.tsf.2016.03.028 ◽

2016 ◽

Vol 606 ◽

pp. 13-18 ◽

Cited By ~ 4

Author(s):

S. Seidel ◽

A. Sabelfeld ◽

R. Strohmeyer ◽

G. Schreiber ◽

V. Klemm ◽

...

Keyword(s):

Thin Films ◽

Spin Coating ◽

Au Nanoparticles ◽

Sol Gel ◽

Zro2 Sol

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EXAFS studies on erbium-doped TiO2 and ZrO2 sol–gel thin films

Journal of Non-Crystalline Solids ◽

10.1016/s0022-3093(01)00805-5 ◽

2001 ◽

Vol 291 (1-2) ◽

pp. 56-77 ◽

Cited By ~ 23

Author(s):

C. Mignotte

Keyword(s):

Thin Films ◽

Sol Gel ◽

Doped Tio2 ◽

Erbium Doped ◽

Zro2 Sol

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Organo-Silica Membrane Prepared from TEOS-TEVS Modified with Organic-Acid Catalyst for Brackish Water Desalination

Jurnal Rekayasa Kimia & Lingkungan ◽

10.23955/rkl.v16i2.18107 ◽

2021 ◽

Vol 16 (1) ◽

pp. 11-18

Author(s):

Muthia Elma ◽

Aptar Eka Lestari ◽

Anna Sumardi ◽

Zaini Lambri Assyaifi ◽

Adi Darmawan ◽

...

Keyword(s):

Thin Films ◽

Sol Gel ◽

Acid Catalyst ◽

Silica Matrix ◽

Water Desalination ◽

Feed Water ◽

Silica Membrane ◽

Vinyl Silane ◽

Sol Gel Process ◽

Feed Water Temperature

The sol gel process is one of the processes used in the manufacture of thin films on membranes because it can control the pore size in the resulting silica matrix. In addition, another way to build membrane size can be done by adding catalysts and precursors to be used. In this study, using a combination of tetraethyl ortho silicate (TEOS) and triethoxy vinyl silane (TEVS) precursors and citric acid as a catalyst to produce a silica matrix with mesoporous size so that it is suitable for application in the desalination process. The organo silica membrane was calcined at 350 ° C for 1 hour using the RTP calcination technique under vacuum, thus preventing the decomposition of carbon in the silica matrix. The membrane was dipcoated 4 times to obtain 4 layers. The FTIR (Fourier-transform Infrared Spectroscopy) test was carried out to see the functional groups on xerogel, namely silanol, siloxane and carbon. In addition, the performance of this membrane is carried out by desalination through pervaporation using 0.3% NaCl feed water with variations in feed air temperature, namely 25 ℃, 40 ℃ and 60 ℃. The resulting flux of air value increased with increasing feed water temperature, namely 6.1; 11.2; and 12.1 kg.m-2h-1 while the resulting salt rejection was 99.72; 99.64 and 99.23%. So that the organo silica membrane is suitable when applied to the desalination process through pervaporation.

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The crystallization of thin-film ceramics

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100122095 ◽

1992 ◽

Vol 50 (1) ◽

pp. 338-339

Author(s):

J.M. Schwartz ◽

L.F. Francis ◽

L.D. Schmidt ◽

P.S. Schabes-Retchkiman

Keyword(s):

Thin Films ◽

Grain Size ◽

Sol Gel ◽

Processing Route ◽

Small Areas ◽

Ceramic Thin Films ◽

Complex Shapes ◽

Sol Gel Process ◽

Ceramic Precursors ◽

Crystalline Ceramic

Ceramic thin films and coatings are of interest for electrical, optical, magnetic and thermal barrier applications. Critical for improved properties in thin films is the development of specific microstructures during processing. To this end, the sol-gel method is advantageous as a versatile processing route. The sol-gel process involves depositing a solution containing metalorganic or colloidal ceramic precursors onto a substrate and heating the deposited layer to form a crystalline or non-crystalline ceramic coating. This route has several advantages, including the ability to create tailored microstructures and properties, to coat large or small areas, simple or complex shapes, and to more easily prepare multicomponent ceramics. Sol-gel derived coatings are amorphous in the as-deposited state and develop their crystalline structure and microstructure during heat-treatment. We are particularly interested in studying the amorphous to crystalline transformation, because many key features of the microstructure such as grain size and grain size distribution may be linked to this transformation.

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