The effect of surface morphology of TiO2 nanotubes on its photocatalytic property and decolorization performance under LED light irradiation
Paper ID : 1607-ICNS
seyed Yahya Rahnamaee1, Reza Bagheri *2, Mohammad Soltaninejad3, Hamed Heidarpour4, Manouchehr Vossoughi5, Ali Samadikouchaksaraee6
1Institute for Nanoscience and Nanotechnology, Sharif university of technology, Tehran, Iran
2Polymer Materials Research Group (PMRG), Department of Materials Science and Engineering , Sharif University of Technology
3Department of Materials Science and Engineering, Sharif University of Technology, Postal code 11365-9466 Tehran, Iran
4Department of Chemical and Petroleum Engineering, Sharif University of Technology
5Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
6Department of Tissue Engineering & Regenerative Medicine, Iran University of Medical Sciences
Semiconductor photocatalysis is a promising alternative to the conventional methods of wastewater treatment due to its higher effectiveness towards recalcitrant contaminants. As a potential photocatalyst for efficient utilization of solar energy, TiO2 nanotubes (TN) have attracted growing interest in recent years. To date, many studies have been made to assess the photocatalytic activity of TN for organic pollutant degradation. However, no investigation has been performed to study the effect of TNs surface morphology on its photocatalytic performance. In this paper, Regular TN (RTN) and Irregular TN (ITN) were fabricated through the electrochemical anodization. FE-SEM micrographs showed that the nanotubes of RTN and ITN with 80 and 100 nm in diameter and 3 and 5 ┬Ám in length were grown successfully on the surface of Ti-6Al-4V sheets, respectively. According to the Photoluminescence analysis, different morphology resulted in different optical property of the semiconductor. Photocatalytic performance of TN was evaluated by the degradation of methylene blue (MB) under LED light irradiation. Results indicated that ITN photocatalysis led to the higher decolorization performance than RTN, attributed to its more available catalytic active sites.
TiO2 nanotubes photocatalyst, Photocatalytic degradation, Azo dye, Surface morphology, Anodization
Status : Abstract Accepted (Poster Presentation)