Structural, electronic, and electrical behaviour of MWCNTs: TiO2 (:SiO2) nanocomposites
學年 109
學期 1
出版（發表）日期 2020-12-01
作品名稱 Structural, electronic, and electrical behaviour of MWCNTs: TiO2 (:SiO2) nanocomposites
作品名稱（其他語言）
著者 James A. Oke; David O. Idisi; Sabata J. Moloi; Sekhar C. Ray; K.H. Chen; A. Ghosh; A. Shelke; W. F. Pong
單位
出版者
著錄名稱、卷期、頁數 Journal of Electron Spectroscopy and Related Phenomena 245, 147002
摘要 We have functionalized multiwall carbon nanotubes (MWCNTs) with the composition of SiO2 and TiO2 (MWCNTs:TiO2:SiO2) at different Ti:Si stoichiometric ratios (Ti:Si ≈ 6:6 at% and ≈10:10 at%) using the hydrothermal process. The micro-structural, electronic and electrical properties of the unfunctionalized and functionalized MWCNTs were studied. Changes in surface morphology, degree of hybridization, crystallite structure and bonding structure due to functionalization were studied using field-emission scanning electron microscopy, Raman spectroscopy, x-ray diffraction, x-ray photoemission spectroscopy (XPS) and x-ray absorption near edge structure (XANES) spectroscopy techniques. Memristive and charge storage properties for MWCNTs:TiO2:SiO2 nanocomposites (NCs) are more pronounced on NCs functionalised with high stoichiometric ratio (Ti:Si ≈ 10:10) due to the contribution of Ti3+ and Si 2p core states as indicated by XPS and XANES results. The tunability of electrical conductivity is shown by an increase in the measured current and semiconducting I–V behaviour of the material as a result of high content of Ti-charge transfer. These observed changes in the electrical behaviour and electronic/bonding structure of the NCs indicate that the material could be useful for electrical/electronic applications and photocatalytic activity.
關鍵字 TiO2;SiO2;MWCNTs;NCs;Raman spectroscopy;XPS I-V technique
語言 en_US
ISSN 1873-2526
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 否
國別 USA
公開徵稿
出版型式 ,電子版,紙本
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