Mjejri Issam, Rougier Aline, Gaudon Manuel
CNRS, ICMCB , UPR 9048, 87 avenue du Dr Albert Schweitzer, F-33608 Pessac, France.
Univ. Bordeaux, ICMCB , UPR 9048, F-33600 Pessac, France.
Inorg Chem. 2017 Feb 6;56(3):1734-1741. doi: 10.1021/acs.inorgchem.6b02880. Epub 2017 Jan 24.
In this study, vanadium sesquioxide (VO), dioxide (VO), and pentoxide (VO) were all synthesized from a single polyol route through the precipitation of an intermediate precursor: vanadium ethylene glycolate (VEG). Various annealing treatments of the VEG precursor, under controlled atmosphere and temperature, led to the successful synthesis of the three pure oxides, with sub-micrometer crystallite size. To the best of our knowledge, the synthesis of the three oxides VO, VO, and VO from a single polyol batch has never been reported in the literature. In a second part of the study, the potentialities brought about by the successful preparation of sub-micrometer VO, VO, and VO are illustrated by the characterization of the electrochromic properties of VO films, a discussion about the metal to insulator transition of VO on the basis of in situ measurements versus temperature of its electrical and optical properties, and the characterization of the magnetic transition of VO powder from SQUID measurements. For the latter compound, the influence of the crystallite size on the magnetic properties is discussed.
在本研究中，三氧化二钒（VO）、二氧化钒（VO）和五氧化二钒（VO）均通过单一多元醇路线，经由中间前驱体乙醇酸氧钒（VEG）的沉淀而合成。在可控的气氛和温度下，对VEG前驱体进行各种退火处理，成功合成了三种纯氧化物，其微晶尺寸为亚微米级。据我们所知，文献中从未报道过从单一多元醇批次合成VO、VO和VO这三种氧化物。在研究的第二部分中，通过对VO薄膜的电致变色特性进行表征、基于原位测量其电学和光学性质随温度变化情况对VO的金属-绝缘体转变进行讨论，以及通过超导量子干涉仪测量对VO粉末的磁转变进行表征，阐述了成功制备亚微米级VO、VO和VO所带来的潜力。对于后一种化合物，讨论了微晶尺寸对磁性能的影响。
