[논문]MoO2-TiO2 나노섬유 복합체의 가시광선 광촉매 및 슈퍼캐패시터 전극 응용

서수정; 암나 투시프; 하산 삼시; 김현철; 길명섭

doi:10.12772/tse.2018.55.239

MoO2-TiO2 나노섬유 복합체의 가시광선 광촉매 및 슈퍼캐패시터 전극 응용
MoO2-decorated TiO2 Nanofiber Composite as Visible-light Photocatalysts and Electrodes for Supercapacitor Applications

한국섬유공학회지 = Textile science and engineering, v.55 no.4, 2018년, pp.239 - 246

서수정 (전북대학교 유기소재파이버공학과) , 암나 투시프 (알바하대학교 과학대학) , 하산 삼시 (알바하대학교 과학대학) , 김현철 (청운대학교 융합기술경영학부) , 길명섭 (전북대학교 유기소재파이버공학과)

Abstract ▼ AI-Helper

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.

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문제 정의

To get the electrode with high surface area, heterostructure based on one-dimensional (1D) nanostructures will be highly useful as electrode material for supercapacitor application. In this study, we have designed and fabricated a novel MoO₂ decorated TiO₂ nanocomposite with the aim to get better electrochemical activity than pristine TiO₂ and MoO₂. The synthesized MoO₂ -decorated TiO₂ heterostructure can serve as an efficient alternative for practical use in decontamination of water and as an economic, easily available electrode material for supercapacitors.

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