Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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MoO2-decorated TiO2 Nanofiber Composite as Visible-light Photocatalysts and Electrodes for Supercapacitor Applications

MoO2-TiO2 나노섬유 복합체의 가시광선 광촉매 및 슈퍼캐패시터 전극 응용

  • Seo, Su-Jung (Department of Organic Materials and Fiber Engineering, Chonbuk National University) ;
  • Amna, Touseef (College of Science, Albaha University) ;
  • Hassan, M. Shamshi (College of Science, Albaha University) ;
  • Kim, Hyun-Chel (School of Integrated Technology & Entrepreneurship, Chungwoon University) ;
  • Khil, Myung-Seob (Department of Organic Materials and Fiber Engineering, Chonbuk National University)
  • Received : 2018.07.05
  • Accepted : 2018.08.11
  • Published : 2018.08.31
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Abstract

Anchoring zero-dimensional nanoparticles on a one-dimensional nanomaterial is potentially advantageous in many applications. In this work, we successfully synthesized $MoO_2$- decorated $TiO_2$ nanofibers using a hydrothermal method with ethanol as a reducing agent. The samples were characterized by XRD, SEM-EDX, EPMA, Raman spectroscopy, and FT-IR. The samples were investigated for visible-light photocatalytic activity using methylene blue as a model dye. The novel $MoO_2$-decorated $TiO_2$ composite showed remarkably enhanced performance compared to pristine $MoO_2$ and $TiO_2$. The $MoO_2$-decorated $TiO_2$ composite also exhibited higher electrochemical capacitance than the pristine samples as electrode materials for supercapacitors. The obtained high photocatalytic activity and supercapacitance can be attributed to the synergistic effects between the $MoO_2$ nanoparticles and $TiO_2$ nanofibers. A maximum specific capacitance of $245.1Fg^{-1}$, measured by cyclic voltammetry at a scan rate of 2 mV/s, was achieved in a $1M\;H_2SO_4$ aqueous solution. The electrochemical performances of pure $MoO_2$ nanoparticles were significantly improved after adding $TiO_2$ nanofibers. These results suggest the applicability of the $MoO_2$-decorated $TiO_2$ hierarchical design for the removal of chemical pollutants and as electrode materials for supercapacitors.

Keywords

References

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