AgMoO·2HO 纳米棒在高压下：原位拉曼光谱研究。
AgMoO·2HO nanorods under high pressure: In situ Raman spectroscopy.
机构信息
Department of Physics, Federal University of Maranhão, 65080-805 São Luís, MA, Brazil.
Lyman Laboratory of Physics, Harvard University, Cambridge, MA 02138, USA.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2023 Oct 15;299:122871. doi: 10.1016/j.saa.2023.122871. Epub 2023 May 14.
This work presents a pressure-dependent behavior of silver trimolybdate dihydrate (AgMoO·2HO) nanorods using in situ Raman scattering. The AgMoO·2HO nanorods were obtained by the hydrothermal method at 140 °C for 6 h. The structural and morphological characterization of the sample was performed by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM). Pressure-dependent Raman scattering studies were performed on AgMoO·2HO nanorods up to 5.0 GPa using a membrane diamond-anvil cell (MDAC). The vibrational spectra under high pressure showed splitting and emergence of new bands above 0.5 GPa and 2.9 GPa. Reversible phase transformations under pressure were observed in silver trimolybdate dihydrate nanorods: Phase I - ambient phase (1 atm - 0.5 GPa) → Phase II (0.8 GPa - 2.9 GPa) → Phase III (above 3.4 GPa).
本工作利用原位拉曼散射研究了二水合银三钼酸盐（AgMoO·2HO）纳米棒的压力依赖性行为。AgMoO·2HO 纳米棒通过在 140°C 下水热合成 6 小时得到。通过粉末 X 射线衍射（XRD）和扫描电子显微镜（SEM）对样品进行了结构和形态表征。使用膜片金刚石压腔（MDAC），在高达 5.0 GPa 的压力下对 AgMoO·2HO 纳米棒进行了压力依赖的拉曼散射研究。高压下的振动光谱显示，在 0.5 GPa 以上和 2.9 GPa 以上出现了分裂和新带的出现。在银三钼酸盐二水合物纳米棒中观察到了压力下的可逆相变：相 I - 环境相（1 大气压-0.5 GPa）→相 II（0.8 GPa-2.9 GPa）→相 III（高于 3.4 GPa）。
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