Abstract

Hydrothermal synthesis of V₂O₅ using ammonium vanadate and oxalic acid as the starting reactants was studied. The hydrothermal treatment of a solution at 200°C (6 h) gave a dark blue precipitate of vanadium dioxide consisting mainly of the monoclinic (B) phase. Further heat treatment at 350°C for 2 h resulted in vanadium dioxide oxidation to V₂O₅. The V₂O₅ particles thus obtained were 1–1.2 µm-long nanorods of 10–20 nm in diameter. The obtained powder was used to form a coating on an aluminum substrate. The distribution of local electrophysical properties over the surface of V₂O₅ particles was studied using scanning Kelvin probe microscopy and scanning capacitance microscopy.

中文翻译：

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草酸水热合成纳米分散 V2O5

摘要

研究了以钒酸铵和草酸为起始反应物的V ₂ O _{5的水热合成。}在 200°C (6 h) 下对溶液进行水热处理得到深蓝色的二氧化钒沉淀，主要由单斜 (B) 相组成。在 350°C 下进一步热处理 2 小时导致二氧化钒氧化成 V ₂ O ₅。如此获得的 V ₂ O ₅颗粒是 1-1.2 µm 长、直径 10-20 nm 的纳米棒。所得粉末用于在铝基材上形成涂层。_{V 2} O ₅表面局部电物理性质的分布使用扫描开尔文探针显微镜和扫描电容显微镜研究颗粒。