Synthesis of cubic silver titanium oxide with a spinel-based structure

Synthesis of cubic silver titanium oxide with a spinel-based structure
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尖晶石结构立方银钛氧化物的合成

DOI:
10.1016/j.jssc.2021.122514
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发表时间:
2021
影响因子:
3.3
通讯作者:
Tada Kohei
Tada Kohei
中科院分区:
化学3区
文献类型:
--
作者:
Kitta Mitsunori;Kojima Toshikatsu;Kataoka Riki;Tada Kohei

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Ag-Ti-O三元体系(ATO)中的银钛氧化物已被报道为单斜相结构,但迄今为止尚未报道其他类型的结构。在这项研究中,我们报道了具有尖晶石结构的立方型银钛氧化物。通过尖晶石型钠钛氧化物(NTO)的Ag+离子交换反应成功合成了立方型ATO。通过AgNO3水溶液工艺,Ag+优先取代NTO材料尖晶石8a位点(氧四面体位点)的Na+。此外,通过AgNO3在KNO3熔体中对NTO的热处理,离子交换得以彻底进行。所得粉末的 X 射线衍射图清楚地显示出立方相衍射峰 (a​= ​8.84 ​Å),对应于 Ag+ 占据 8a 位的尖晶石结构。元素分析证实,采用Ag2.86Ti5O11.43配方可以合成纯ATO材料。
Silver titanium oxides in the Ag–Ti–O ternary system (ATO) have been reported as monoclinic phase structures, but no other types of structures have been reported to date. In this study, we report cubic-type silver titanium oxide with a spinel-based structure. Cubic-type ATO was successfully synthesized via the Ag+ion-exchange reaction of spinel-type sodium titanium oxide (NTO). Ag+preferentially substituted Na+in the spinel 8a-site (oxygen tetrahedral site) of the NTO material by the AgNO3aqueous solution process. Further, ion- exchange thoroughly proceeded via the thermal process of NTO by AgNO3in the KNO3melt. The X-ray diffraction pattern of the obtained powder clearly showed cubic-phase diffraction peaks (a​= ​8.84 ​Å) corresponding to the spinel-based structure with Ag+occupying the 8a-site. Elemental analysis confirmed that pure ATO material could be synthesized with Ag2.86Ti5O11.43formula.
DOI: 10.1524/zkri.1922.57.1.253
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