Low-temperature hydrothermal synthesis and characterization of SrTiO<sub>3</sub> photocatalysts for NO<i><sub>x</sub></i> degradation

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  • KOBAYASHI Mariko
    Graduate School of Pure and Applied Sciences, University of Tsukuba
  • SUZUKI Yoshikazu
    Graduate School of Pure and Applied Sciences, University of Tsukuba Faculty of Pure and Applied Sciences, University of Tsukuba
  • GOTO Tomoyo
    The Institute of Scientific and Industrial Research (ISIR), Osaka University
  • CHO Sung Hun
    The Institute of Scientific and Industrial Research (ISIR), Osaka University
  • SEKINO Tohru
    The Institute of Scientific and Industrial Research (ISIR), Osaka University
  • ASAKURA Yusuke
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University
  • YIN Shu
    Institute of Multidisciplinary Research for Advanced Materials, Tohoku University

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  • Low-temperature hydrothermal synthesis and characterization of SrTiO 3 photocatalysts for NO x degradation

Abstract

SrTiO3 is an excellent photocatalyst due to its high photocorrosion resistance and thermal stability. In this study, we synthesized SrTiO3 nanoparticles with high specific surface areas by the hydrothermal method at reduced temperature. Titanium(IV) bis(ammonium lactato)dihydroxide (TALH) solution and strontium hydroxide octahydrate [Sr(OH)2·8H2O] were used as starting materials. SrTiO3 nanoparticles were directly synthesized by hydrothermal heating at 150°C for 72–120 h. The synthesized nanoparticles had diameters of 20–40 nm, and the SrTiO3 powder heated for 72 h exhibited the highest specific surface area of 33.1 m2/g. This sample also showed the highest degradation rate for NO gas.

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