Low-Dimensional Carbon and Titania Nanotube Composites via a Solution Chemical Process and Their Nanostructural and Electrical Properties for Electrochemical Devices

  • Sunghun Eom
    Sunghun Eom
    The Institute of Scientific and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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  • Sung Hun Cho
    Sung Hun Cho
    The Institute of Scientific and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
    More by Sung Hun Cho
  • Tomoyo Goto
    Tomoyo Goto
    The Institute of Scientific and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
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  • Myoung Pyo Chun
    Myoung Pyo Chun
    Korea Institute of Ceramic Engineering and Technology (KICET), Soho 101, Jinju, Gyeongsangnam 52851, Korea
  • , and 
  • Tohru Sekino*
    Tohru Sekino
    The Institute of Scientific and Industrial Research (ISIR), Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
    *Tel.: +81-6-6879-8435. E-mail: [email protected]
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Cite this: ACS Appl. Nano Mater. 2019, 2, 10, 6230–6237
Publication Date (Web):September 10, 2019
https://doi.org/10.1021/acsanm.9b01188
Copyright © 2019 American Chemical Society
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Abstract

We report on the synthesis of two-dimensional graphene oxide (GO) and one-dimensional titania nanotube (TNT) nanocomposites as well as one-dimensional multiwall carbon nanotube (CNT) and one-dimensional titania nanotube nanocomposites via a chemical solution process. The morphology, electrical properties, and chemical bonding of each nanocomposite were investigated. The microstructural analysis revealed the formation of one-dimensional core–shell structures and two-dimensional sheet structures for the CNT/TNT and GO/TNT nanocomposite systems, respectively. Tubular titania nanostructures were decorated on the GO nanosheets to form two-dimensional composite structure. We found that the carbon and oxide nanocomposites exhibited strong carbon–inorganic oxide bonding, and both low-dimensional carbon materials contributed to an improvement in the electrical conduction property (electrical resistivity of nanocomposites was approximately 104 Ω·cm) when compared to that of pristine titania nanotubes (106 Ω·cm). The present nanocomposites however had 2 orders of magnitude higher resistivity than the simply mixed powder of CNT and TNT owing to the characteristic morphology consisting of the CNT-core and TNT-shell, that reduced direct contact of CNTs among CNT/TNT nanocomposite powder; notwithstanding, we suggest that carbon addition to titania nanotubes results in enhanced electrical properties and improved semiconducting properties, which are key in the development of small-sized electronic devices.

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The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acsanm.9b01188.

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Cited By


This article is cited by 3 publications.

  1. Gi Mihn Kim, Won Yeong Choi, Jae Hyun Park, Seung Jin Jeong, Jong-Eun Hong, WooChul Jung, Jae W. Lee. Electrically Conductive Oxidation-Resistant Boron-Coated Carbon Nanotubes Derived from Atmospheric CO2 for Use at High Temperature. ACS Applied Nano Materials 2020, 3 (9) , 8592-8597. https://doi.org/10.1021/acsanm.0c01909
  2. Hyunsu Park, Tomoyo Goto, Sunghun Cho, Hisataka Nishida, Tohru Sekino. Enhancing Visible Light Absorption of Yellow-Colored Peroxo-Titanate Nanotubes Prepared Using Peroxo Titanium Complex Ions. ACS Omega 2020, 5 (34) , 21753-21761. https://doi.org/10.1021/acsomega.0c02734
  3. Hyunsu Park, Tomoyo Goto, Do Hyung Han, Sunghun Cho, Hisataka Nishida, Tohru Sekino. Low Alkali Bottom-Up Synthesis of Titanate Nanotubes Using a Peroxo Titanium Complex Ion Precursor for Photocatalysis. ACS Applied Nano Materials 2020, 3 (8) , 7795-7803. https://doi.org/10.1021/acsanm.0c01347