Synthesis and Characterization of TiO₂/CuS Nanocomposite Fibers as a Visible Light-Driven Photocatalyst
- Title
- Synthesis and Characterization of TiO₂/CuS Nanocomposite Fibers as a Visible Light-Driven Photocatalyst
- Author
- 좌용호
- Keywords
- Nanocomposite; Functional applications; Heterojunction; Electronic band structure; Photocatalytic activity
- Issue Date
- 2018-05
- Publisher
- Korean Ceramic Society
- Citation
- Journal of the Korean Ceramic Society, v. 55, No. 3, Page. 267-274
- Abstract
- TiO₂/CuS nanocomposites were fabricated by precipitation of nanosized CuS via sonochemical method on electrospun TiO₂ nanofibers, and their structure, chemical bonding states, optical properties, and photocatalytic activity were investigated. In the TiO₂/CuS nanocomposite, the position of the conduction band for CuS was at a more negative than that of TiO; meanwhile, the position of the valence band for CuS was more positive than those for TiO, indicating a heterojunction structure belonging to type-II band alignment. Photocatalytic activity, measured by decomposition of methylene blue under visible-light irradiation (λ > 400 ㎚) for the TiO₂/CuS nanocomposite, showed a value of 85.94% at 653 ㎚, which represented an improvement of 52% compared to that for single TiO₂ nanofiber (44.97% at 653 ㎚). Consequently, the photocatalyst with TiO₂/CuS nanocomposite had excellent photocatalytic activity for methylene blue under visible-light irradiation, which could be explained by the formation of a heterojunction structure and improvement of the surface reaction by increase in surface area.
- URI
- https://www.jkcs.or.kr/journal/view.php?number=8116https://repository.hanyang.ac.kr/handle/20.500.11754/105510
- ISSN
- 1229-7801
- DOI
- 10.4191/kcers.2018.55.3.05
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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