Nanotextured cupric oxide nanofibers coated with atomic layer deposited ZnO-TiO2 as highly efficient photocathodes
- Nanotextured cupric oxide nanofibers coated with atomic layer deposited ZnO-TiO2 as highly efficient photocathodes
- 김민우; 윤현; 엄태윤; 조홍석; 안성필; 최성규; 박현웅; Salem S. Al-Deyab; Mark T. Swihart; 윤석구; 민병권
- cupric oxide; photocathodes; hydrogen
- Issue Date
- Applied catalysis B, Environmental
- VOL 201-485
- We report the fabrication and performance of a CuO/ZnO/TiO2 nanofiber photocathode that achieved a photocurrent density (PCD) of − 4.1 mA/cm2, which is among the highest PCD values reported for a copper oxide based photocathode without a co-catalyst. To prepare this photocathode, we coated electrospun nanofibers with copper by electroplating, then dried them in air to produce cuprous oxide (Cu2O) nanofibers. Further annealing in air converted them to cupric oxide (CuO). The CuO nanofibers exhibit nanotextured surfaces, resembling the skin of the “thorny-devil” lizard of Australia, providing high accessible surface area for photocatalysis. These CuO nanofibers were uniformly coated with thin ZnO and TiO2 layers by atomic layer deposition (ALD) to promote electron migration from CuO to TiO2 and protect the CuO from corrosion. The nanofibrous photocathode films were characterized by X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, atomic force microscopy, scanning electron microscopy, and transmission electron microscopy, as well as by incident photon-to-electron conversion efficiency measurements.
- Appears in Collections:
- KIST Publication > Article
- Files in This Item:
There are no files associated with this item.
- RIS (EndNote)
- XLS (Excel)
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.