@article{Jongprateep_Sato_Techapiesancharoenkij_Surawathanawises_Siwayaprahm_Watthanarat_2019, place={Bangkok, Thailand}, title={Photocatalytic and antimicrobial activities of Sr<sub>x</sub>Ca<sub>(1-x)</sub>TiO<sub>3</sub> (x=0, 0.25, 0.5, 0.75 and 1) powders synthesized by solution combustion technique}, volume={29}, url={https://jmmm.material.chula.ac.th/index.php/jmmm/article/view/481}, abstractNote={Unique dielectric properties of strontium titanate and calcium titanate accommodate utilization of the materials in electronic devices. Doping generally alters microstructure and electronic band structure, which influence catalytic performance of the materials. This study aimed at examining photocatalytic activities of Sr&lt;sub&gt;x&lt;/sub&gt;Ca&lt;sub&gt;(1-x)&lt;/sub&gt;TiO&lt;sub&gt;3&lt;/sub&gt; (x = 0, 0.25, 0.5, 0.75 and 1) powders synthesized by solution combustion technique. Relationships among chemical composition, microstructure, bandgap, photocatalytic and antimicrobial performance of Sr&lt;sub&gt;x&lt;/sub&gt;Ca&lt;sub&gt;(1-x)&lt;/sub&gt;TiO&lt;sub&gt;3&lt;/sub&gt; were also examined. Experimental results revealed that according to the initial compositions single phases of CaTiO&lt;sub&gt;3&lt;/sub&gt;, Sr&lt;sub&gt;x&lt;/sub&gt;Ca&lt;sub&gt;(1-x)&lt;/sub&gt;TiO&lt;sub&gt;3&lt;/sub&gt; and SrTiO&lt;sub&gt;3&lt;/sub&gt; were observed. Sub-micrometer-sized particles, with average specific surface area ranging from 4.2 to 7.4 m&lt;sup&gt;2&lt;/sup&gt;·g&lt;sup&gt;-1&lt;/sup&gt;, were present. Reduction of bandgap energy was evident in the Sr&lt;sub&gt;x&lt;/sub&gt;Ca&lt;sub&gt;(1-x)&lt;/sub&gt;TiO&lt;sub&gt;3&lt;/sub&gt; (x = 0.25, 0.5, and 0.75) powders. Attributed to superior specific surface area and minimal bandgap energy, the greatest photocatalytic degradation of methylene blue measured at wavelength close to 660 nm was observed in Sr&lt;sub&gt;0.75&lt;/sub&gt;Ca&lt;sub&gt;0.25&lt;/sub&gt;TiO&lt;sub&gt;3&lt;/sub&gt;. Experimental results also revealed decent antibacterial performance with percent of bacterial colony reduction greater than 90%. The antibacterial results agreed well with the photocatalytic performance.}, number={3}, journal={Journal of Metals, Materials and Minerals}, author={Jongprateep, Oratai and Sato, Nicha and Techapiesancharoenkij, Ratchatee and Surawathanawises, Krissada and Siwayaprahm, Patcharaporn and Watthanarat, Phonphan}, year={2019}, month={Sep.} }