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SrTiO   3    adalah material berstruktur perovskit yang dilaporkan berpotensi sebagai material fotokatalis. Penggantian pada sebagian kation-  A   material fotokatalis berstruktur perovskit dilaporkan dapat menurunkan energi celah pitanya, akan tetapi unsur pengganti juga dilaporkan mempengaruhi morfologi partikel yang terbentuk. Dalam penelitian ini, dikaji pengaruh penggantian kation-  A   pada SrTiO   3   (Ba   x   Sr   (1-    x    )   TiO   3    (  x   = 0; 0,2; 0,4; 0,6; 0,8)) terhadap morfologi partikelnya. Senyawa uji disintesis dengan metode lelehan garam dan dalam penelitian ini menggunakan garam NaCl. Difraktogram sampel menunjukkan bahwa senyawa uji berhasil disintesis kecuali pada   x   = 0,8 masih ditemukan senyawa pengotor yang berupa TiO   2    dan BaCO   3   . Gambar SEM menunjukkan bahwa keberadaan kation Ba mengubah morfologi partikel dari   nearly cubic   menjadi bentuk polihedra dan menyebabkan  ukuran partikel menjadi lebih besar.The Effect of Cation-  A  /Sr Replacement by Ba on Particle Morphology of Ba   x   Sr   (1-    x    )   TiO   3    (x = 0; 0.2; 0.4; 0.6; 0.8) Synthesized by Molten Salt Method.    SrTiO   3    is a perovskite structure material that is reported as a potential photocatalyst material. Replacement of a part of the   A  -cation on a perovskite structure was reported can reduce its bandgap energy. However, the replacement element was also reported to affect the particle morphology. In this study, the effect of   A-  cation replacement on SrTiO   3    (Ba   x   Sr   (1-    x    )   TiO   3    (  x   = 0, 0.2, 0.4, 0.6, 0.8) to its particle morphology was studied. The sample of Ba   x   Sr   (1-    x    )   TiO   3    (  x   = 0, 0.2, 0.4, 0.6) were synthesized by molten salt synthesis method (using NaCl salt). The diffractogram showed that the target compound was successfully synthesized but at   x   = 0.8 still found impurities TiO   2    and BaCO   3   . SEM images showed that Ba-cation presence changes the particle morphology from nearly cubic to polyhedral shape and the particle size also becomes larger. 

Pengaruh Penggantian Kation-A/Sr oleh Ba pada Morfologi Partikel BaxSr(1-x)TiO3 (x = 0; 0,2; 0,4; 0,6; 0,8) Hasil Sintesis dengan Metode Lelehan Garam