Photocatalytic activity and stability properties of porous TiO2 film as photocatalyst for methylene blue and methylene orange degradation

Abstract

The development of photocatalyst material is strongly required to provide an efficient and effective photocatalyst with respect to photocatalytic activity performance, and also more specifically reusability. In this paper, we discuss the synthesis process of porous TiO2 film onto a glass substrate for photocatalyst with the assistance of doctor’s blade method coating which is considered as a simple and low-cost process. The porous TiO2 film with nanoparticle structure was then successfully deposited on the glass substrate. The FESEM results show the cross-section of porous TiO2 film on top of the glass substrate with a thickness of 25.05 µm and the nanoparticle size is around 100 nm, while EDS mapping shows the presence of titanium and oxygen without any impurities. Meanwhile, the anatase structure of porous TiO2 was confirmed by XRD and belongs to space group of I41/amd. The chemical bonding of Ti and O for porous TiO2 film has been analyzed using Raman shift and the highest active mode belongs 433 peak which shows the typical structure of TiO2 anatase. Meanwhile, UV-Vis analysis shows that the porous TiO2 has bandgap energy of ~3.2 eV. The photocatalyst result shows that porous TiO2 has reached 90% degradation process.