5TH International Congress on Technology - Engineering & Science - Kuala Lumpur - Malaysia (2018-02-01)

Growth Of 1-d Nanostructured Moox Thin Films By Flame Vapor Deposition Process

Nanostructured MoOx has received increasing attention due to their unique optical and electrochemical properties for a variety of applications, especially, as electrode material for lithium ion batteries [1] and sodium-ion intercalation battery [2], recently. MoS2 has been newly found to be one of potential alternatives to replace Pt catalyst for electrochemical hydrogen generation [3], which can be transformed (or partially done as composites) from MoOx by simple sulfurization [4]. For many cases, vertically aligned 1-D nanostructures are still of great interest owing to their high aspect ratio and direct charge transport pathway. In our study, the growth of 1-D nanostructures of MoOx were achieved by using a newly developed Mo wire feeder incorporated flame vapor deposition (FVD) system. Mo wire feed rate was found to be a key parameter controlling the evolution of nanostructures morphology. As wire feed rate increases, nanostructures change from nanowires to nanotubes, and to branched tree-like structures, as presented in Figure 1. This feeder incorporated FVD approach is a significant step towards the synthesis of 1-D MoOx NWs and NTs with desirable length to apply for sodium-ion intercalation battery. Furthermore, these NWs and NTs can provide an excellent support to fabricate composite materials such as 1-D core/shell MoOx/ MoS2 nanostructures by sulfurization to be used as catalyst for hydrogen evolution.
Nam-Jae Yoo, Jin-Rui Ding, Kyo-Seon Kim