Parmar Rahul, Amati Matteo, Gregoratti Luca, Rezvani Seyed Javad, Banerjee Pritam, Rajak Piu, Ciancio Regina, Gunnella Roberto
Elettra Sincrotrone Trieste SCpA, Strada Statale 14, AREA Science Park, 34149, Basovizza, Trieste, Italy.
Physics Division, School of Science and Technology, University of Camerino, 62032, Camerino, Macerata, Italy.
ACS Omega. 2022 Aug 22;7(35):31115-31119. doi: 10.1021/acsomega.2c03236. eCollection 2022 Sep 6.
Herein, we report the microscopic and spectroscopic signatures of the hydrated VO phase, prepared from the α-VO powder, which was kept in deionized water inside an airtight glass container for approximately 2.5 years. The experimental results show an evolution of the V component in V 2p core energy level spectra, and a peak corresponding to σ-OH bond appeared in the valence band spectra in the hydrated VO powder sample due to the water intercalation. Vanadium metal oxide particles were found to be self-nucleated into micro/nanorods after a long period of exposure to an extremely humid environment. The distinct features in the spectra obtained with high-resolution transmission electron microscopy, micro-Raman scattering, and X-ray photoelectron spectroscopy confirmed the presence of structural water molecules for the first time in the long-aged naturally hydrated VO phase.
在此，我们报告了由α-VO粉末制备的水合VO相的微观和光谱特征，该α-VO粉末在气密玻璃容器中的去离子水中保存了约2.5年。实验结果表明，V 2p核心能级光谱中的V成分发生了演变，并且由于水的嵌入，水合VO粉末样品的价带光谱中出现了对应于σ-OH键的峰。发现钒金属氧化物颗粒在长期暴露于极端潮湿环境后自核化为微/纳米棒。通过高分辨率透射电子显微镜、显微拉曼散射和X射线光电子能谱获得的光谱中的独特特征首次证实了在长期自然水合的VO相中存在结构水分子。
