Synthesis of Ba 1+xV 6O 16· nH 2O single-crystalline nanobelts and seamless ring-like structures

Abstract

Single crystalline Ba 1+ x V 6O 16· nH 2O ( x ≈ 0.2 , n ≈ 3 ) nanobelts and a small quantity of seamless ring-like structures have been synthesized by a simple hydrothermal treatment of barium polyvanadate precursor. The nanobelts with a rectangular cross section are up to several tens of micrometers in length, 100–300 nm in width, and less than 50 nm in thickness. The ring-like structures with outer diameters of 3–5 μm have several different types, such as plate-like, tube-like, doughnut-like and wheel-like morphologies. A probable mechanism for the formation of Ba 1+ x V 6O 16· nH 2O nanobelts and ring-like structures is proposed.