Synthesis and Characterization of the Orthorhombic Sn3O4 Polymorph
Synthesis and Characterization of the Orthorhombic Sn3O4 Polymorph
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DOI：
10.1002/anie.202300640
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发表时间：
2023-03-20
影响因子：
16.6
通讯作者：
Miyauchi, Masahiro
中科院分区：
文献类型：
--
作者：
Liu, Yang-Shin;Yamaguchi, Akira;Miyauchi, Masahiro
采用水热法合成了一种新的氧化锡晶相（Sn 3 O 4）。在调整水热合成的经常被忽视的参数，即前体溶液的填充程度和反应器顶部空间中的气体组成后，发现了未报道的X射线衍射图案。通过各种表征研究，如Rietveld分析，能量色散X射线光谱和第一性原理计算，这种新材料的特征在于正交混合价态氧化锡与组成（Sn 2SnO 4）-Sn-II-O-IV。这种正交晶系的氧化锡是一种新的多晶型的Sn 3 O 4，这不同于传统的单斜晶系结构的报道。计算和实验分析表明，正交晶系的Sn 3 O 4具有较小的带隙（2.0 eV），使可见光的吸收更大。该研究有望提高水热合成的准确性，并有助于发现新的氧化物材料。
An unexplored tin oxide crystal phase (Sn3O4) was experimentally synthesized via a facile hydrothermal method. After tuning the often-neglected parameters for the hydrothermal synthesis, namely the degree of filling of the precursor solution and the gas composition in the reactor head space, an unreported X-ray diffraction pattern was discovered. Through various characterization studies, such as Rietveld analysis, energy dispersive X-ray spectroscopy, and first-principles calculations, this novel material was characterized as orthorhombic mixed-valence tin oxide with the composition (Sn2SnO4)-Sn-II-O-IV. This orthorhombic tin oxide is a new polymorph of Sn3O4, which differs from the reported conventional monoclinic structure. Computational and experimental analyses showed that orthorhombic Sn3O4 has a smaller band gap (2.0 eV), enabling greater absorption of visible light. This study is expected to improve the accuracy of hydrothermal synthesis and aid the discovery of new oxide materials.