[11a-Z26-1~13] 9.2 ナノ粒子・ナノワイヤ・ナノシート

▲ [11a-Z26-7] Synthesis of MoO₃ belts by a thermal evaporation method

〇(D)Ngo Minh Chu¹、Nguyen Duy Hieu¹、Thi Mai Dung Do¹、Tadachika Nakayama¹、Koichi Niihara¹、Hisayuki Suematsu¹ (1.Nagaoka University of Technology)

キーワード：MoO3 belts, thermal vaporation

MoO₃ is one of the transition metal oxides, and its one dimension structure has been recognized to be a promising material for many applications including, catalysis, electronics devices, optical-display devices, chemical synthesis, and battery application. In this presented work, a large-scale of MoO₃ belts was synthesized at different temperatures from 800-1050 ^oC by using a tube furnace, MoO₃ belts were deposited inside the tube on the surface of the inner tube-wall. The belts were shown with a good agreement with the highly aligned α-MoO₃ crystals (ICDD #000050508). Each sample was observed by a field emission scanning electron microscopy (FE-SEM). In comparing with previous studies, this experiment is considered as a simple method to synthesize MoO₃ belts with a large amount. The belts were formed under a vapor-solid mechanism. At the first step, the MoO₃ at above ^oC was evaporated; by controlling the flowing gas in the furnace, the vapor moved to a lower temperature area then stared depositing on the tube-wall. At a fixed point on the tube, MoO3 belts were formed and collected. It is assumed that by varying the flowing gas and the temperature, the size and quantity of belts could be controlled.