Preparation of a transparent hydrophilic TiO2 thin film photocatalyst

Date

2009-04-01

Author

Chun, Hye-Yeon
Park, Sam-Sik
You, Sang-Hee
Kang, Gi-Hyeon
Bae, Won-Tae
Kim, Kwang-Wook
Park, Jong-Ee
Öztürk, Abdullah
Shin, Dong-Woo

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

205
views

0
downloads

A great deal of attention has been drawn to the coating of transparent photocatalytic TiO2 onto outdoor building materials, such as glass, the and stone, for utilizing the self-cleaning effect originating from the hydrophilic behavior of the coated layer under ultraviolet irradiation. Two key technologies should be developed for the successful commercialization of a hydrophilic photocatalyst, i.e., superior activity of the TiO2 sol, and a transparent and strong adhesive coating. A photocatalytic TiO2 Sol showing a high degree of hydrophilicity was prepared by a sol-gel technique using titanium (IV) isoproxide as a starting materials. The concentration of TiO2 was controlled by varying the amount of water and ethanol. The sol was coated on the glass substrate by either a spray or dip coating technique. The characteristics of the coated layer were evaluated in terms of wetting angle, transparency and adhesion strength under the conditions of ultraviolet irradiation. The wettability of a water drop for the wetting angle, UV-visible spectrometer for transparency and pencil hardness for adhesive strength were employed for the evaluations. The coated TiO2 layer using 1.54 wt% TiO2 sol showed more than 95% transparency, less than 10 degrees of wetting angel and an adhesive strength of 7H. As a result of this study, photocatalytic TiO2 coated stone for the application of outdoor building materials has been successfully commercialized.

Subject Keywords

Eccentrically braced frame, Steel, Fundamental period, Seismic

URI

https://hdl.handle.net/11511/53294

Journal

JOURNAL OF CERAMIC PROCESSING RESEARCH

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Fabrication of various metal nanostructures with hole mask colloidal lithography Öztürk, İbrahim Murat; Bek, Alpan; Department of Physics (2014) In this work, a novel surface nanostructuring technique called hole mask colloidal lithography (HMCL) is investigated and utilized to fabricate large area metal nanostructures with several geometries with photoresist over exposure and over develop as the undercutting method. Some extends of this method has been examined with constant angled deposition of dimer structures. HMCL takes advantage of directional nature of thermal evaporation method for metal deposition through the nanoscale holes that are placed...
DEVELOPMENT OF A HAND METHOD TO ESTIMATE FUNDAMENTAL PERIODS OF STEEL ECCENTRICALLY BRACED FRAMES Kusyilmaz, Ahmet; Topkaya, Cem (2016-12-09) This paper describes formulation of a hand method which can be used to estimate the computed fundamental periods of vibration of steel eccentrically braced frames (EBFs). The developed method uses the Rayleigh's method as a basis and utilizes the roof drift ratio under seismic forces as a parameter. The roof drift ratio was obtained from EBF designs by considering different seismic hazard, number of stories, braced bay width, and link length to bay width ratio. A simple expression was developed to represent...
Formation and characterization of infrared absorbing copper oxide surfaces Arslan, Burcu; Erdogan, Metehan; Karakaya, İshak (2017-04-30) Copper oxide formation has been investigated to combine the advantages of producing different size and shapes of coatings that possess good light absorbing properties. An aqueous blackening solution was investigated and optimum composition was found as 2.5 M NaOH and 0.225 M NaClO to form velvet copper oxide films. A two-step oxidation mechanism was proposed for the blackening process by carefully examining the experimental results. Formation of Cu2O was observed until the entire copper surface was covered ...
Design and production of antireflection coating for Ge, ZnSe and ZnS in 8-12 micrometer wavelength region Üçer, Begüm; Parlak, Mehmet; Department of Physics (2009) This thesis describes the works done during the design and deposition process of the antireflection coating for the materials commonly used as refractive optical elements in thermal imaging systems. These coatings are quite necessary to reduce reflection losses from the surface of the optics and stray light that directly affects the image quality. Germanium, zinc sulfide and zinc selenide were used as substrate material and their optical properties were investigated with infrared ellipsometry and FTIR. Anti...
Synthesis of colloidal silver particles with different sizes by seeding approach for surface enhanced raman scattering (sers) studies Sancı, Rukiye; Volkan, Mürvet; Department of Chemistry (2009) In this study, silver nanorods and nanospheroids were prepared both in aqueous solution and on the surface of glass slides through seed-mediated growth approach at room temperature and used as a surface enhanced Raman scattering (SERS) substrate. The synthesis of metallic nanorods was started with the production of silver nanospheres as seed utilizing sodium borohydride and trisodium citrate as reducing and capping agents, respectively. These seeds were then added to a growth solution containing additional ...

Citation Formats

H.-Y. Chun et al., “Preparation of a transparent hydrophilic TiO2 thin film photocatalyst,” JOURNAL OF CERAMIC PROCESSING RESEARCH, pp. 219–223, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/53294.