Solvothermal synthesis of designed nonstoichiometric strontium titanate for efficient visible-light photocatalysis

Uyi Sulaeman, Shu Yin, Tsugio Sato

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    43 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Article number103102
    JournalApplied Physics Letters
    Volume97
    Issue number10
    DOIs
    Publication statusPublished - 2010 Sep 6

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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