SrTiO3 powders with various Sr/Ti atomic ratios were synthesized by microwave-assisted solvothermal reactions of SrCl2 and Ti (OC3 H7)4 in KOH aqueous solutions. The nanoparticles of perovskite type SrTiO3 structure with the particle size of 30-40 nm were synthesized. The photocatalytic activity was determined by deNOx ability using light emitting diode lamps of various wavelengths such as 627 nm (red), 530 nm (green), 445 nm (blue), and 390 nm (UV). The photocatalytic activity significantly changed depending on the Sr/Ti atomic ratio, i.e., the strontium rich sample (Sr/Ti atomic ratio>1) showed excellent visible light responsive photocatalytic activity for the oxidative destruction of NO.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)