A layered perovskite photocatalysts, SrBi2Nb2O9 (SBN), was synthesized by the conventional solid-state
reaction method and characterized by X-ray diffraction (XRD) and UV-visble spectrophotometry. The results
showed that the structure of SrBi2Nb2O9 is orthorhombic. Diffuse reflectance spectra for calcined and
attrition-milled SBN showed the main absorption edges were less 400 nm, that is ultraviolet region. SBN
under micron-sized powder was deposited on the Al2O3 by room temperature powder spray in vacuum process,
so called aerosol deposition (AD), and nano-grained SrBi2Nb2O9 photocatalytic thick film was fabricated.
AD-deposited SBN thick films were characterized by XRD, scanning electron microscopy (SEM) and
UV-visable spectrophotometry, Moreover, it was found that several nano-sized SBN film by AD process can
improve the photocatalytic activity under visable reflectance.