Liu Yang-Shin, Yamaguchi Akira, Yang Yue, Aisnada An Niza El, Uchida Sho, Abe Hideki, Ueda Shigenori, Yamaguchi Kenji, Tanabe Toyokazu, Miyauchi Masahiro
Department of Materials Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8552, Japan.
Center for Green Research on Energy and Environmental Materials, National Institute for Materials Science, 1-1, Namiki, Tsukuba, Ibaraki, 305-0044, Japan.
Angew Chem Int Ed Engl. 2023 Apr 17;62(17):e202300640. doi: 10.1002/anie.202300640. Epub 2023 Mar 20.
An unexplored tin oxide crystal phase (Sn O ) 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 Sn Sn O . This orthorhombic tin oxide is a new polymorph of Sn O , which differs from the reported conventional monoclinic structure. Computational and experimental analyses showed that orthorhombic Sn O 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.
通过一种简便的水热法实验合成了一种未被探索的氧化锡晶相（SnO）。在调整了水热合成中常被忽视的参数，即前驱体溶液的填充度和反应釜顶部空间的气体组成后，发现了一种未报道过的X射线衍射图谱。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，这种新型材料被表征为具有SnSnO组成的正交晶系混合价氧化锡。这种正交晶系氧化锡是SnO的一种新多晶型，与报道的传统单斜晶结构不同。计算和实验分析表明，正交晶系SnO具有较小的带隙（2.0 eV），能够更好地吸收可见光。这项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。
