Poster Presentation

¹Bardia Yaghoobi ; ²Abolfazl Zare Bidaki; ³Alireza Shokati

¹Mofid Educational Complex

²School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, Iran.

³Department of Materials Science and Engineering, Imam Khomeini International University, Qazvin, Tehran, Iran.

Dust removal is one of the major problems in the scope of electronics displays. There are a lot of methods by which dust can be removed, the two most practical of which are discussed. First one is the natural dust removal but the only significant natural dust removal is wind clearing, according to different arrays, it is not applicable for all surfaces. The other method is the electrical dust removal using electrical properties of materials to avoid dust particles that have static electricity. By creating a layer having different electrical charge with dust particles, those particles can be prevented from settling on the targeted surface. This difference in electrical charge is the result of creating a thin layer of moisture. Due to its antistatic properties, TiO2 is used for self-cleaning purposes. The self-cleaning property of Titanium dioxide is resulted by the synergy of its own photocatalytic properties which can be activated by sunlight. In this article, the synthesis of transparent thin-film TiO2 has been done by combination of sol-gel process and the Deep-coat method and its properties are reported. Anti-static Nano films have been characterized by the means of the scanning electron microscope test (SEM), the contact-angle test (CA), the photocatalyst test, the Ultraviolet-visible spectroscopy (UV-vis), the real-time dust test and the X-ray diffraction (XRD). The obtained results from SEM test illustrate that the average particles size is about 50-nm. Also, particles are spread evenly on the surface and have equal properties. XRD test takes substances’ crystal structure and morphology into consideration as well as giving information about their crystal orientation (texture) which is approximately uniformed. The UV-vis test shows that the proposed material can remove dust within regular intervals, from 1 hour to the maximum of 5 hours, up to 60% proving the effectiveness of the coating material. The contact-angle test, performed on the coated film, shows a 90% difference with the non-coated surface. In the photocatalyst test, the photocatalytic property appears with high efficiency. furthermore, it is specified that in comparison with non-coated surfaces, thin TiO2 films show high anti-static and photocatalytic efficiency. In the real-time dust test, non-coated and coated surfaces are compared, regarding their real-time anti-dust efficiency. Moreover, from this test it can be concluded that the coated surfaces has a much more considerable anti-dust property, compared to the non-coated ones. As a result of the mentioned test results, it can be stated that the proposed anti-static photocatalytic TiO2 Nano-film shows excellent photocatalytic and anti-static properties.

Anti-static; Self-cleaning; TiO2; dust removal; static electricity; photocatalytic