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Enhanced visible-light photoelectrochemical performance via chemical vapor deposition of Fe2O3 on a WO3 film to form a heterojunction.
- Source :
- Rare Metals; Jul2020, Vol. 39 Issue 7, p841-849, 9p
- Publication Year :
- 2020
-
Abstract
- A heterojunction photoanode of Fe<subscript>2</subscript>O<subscript>3</subscript> loaded on a WO<subscript>3</subscript> film on a fluorine-doped tin oxide substrate (FTO-WO<subscript>3</subscript>/Fe<subscript>2</subscript>O<subscript>3</subscript>) was prepared via a simple hydrothermal and chemical vapor deposition (CVD) growth method. The photoanode showed higher photoelectrochemical (PEC) water-splitting activity than that of the pristine FTO-WO<subscript>3</subscript> under simulated sunlight because of the synergistic effect of Fe<subscript>2</subscript>O<subscript>3</subscript> and WO<subscript>3</subscript>. The as-synthesized material was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The photocurrent density was estimated by linear sweep voltammetry and further confirmed using intensity-modulated photocurrent spectra. Experiments demonstrated that the coated Fe<subscript>2</subscript>O<subscript>3</subscript> enhanced the separation and migration efficiencies of the photoinduced electrons and holes, improving the PEC water-splitting properties. The FTO-WO<subscript>3</subscript>/Fe<subscript>2</subscript>O<subscript>3</subscript> photoanode showed a 1.25 times enhancement in photocurrent density compared with FTO-WO<subscript>3</subscript>. This result suggests that facile chemical vapor deposition growth is an effective way to fabricate heterojunctions and improve the properties of WO<subscript>3</subscript> photoanodes for PEC water-splitting applications. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10010521
- Volume :
- 39
- Issue :
- 7
- Database :
- Complementary Index
- Journal :
- Rare Metals
- Publication Type :
- Academic Journal
- Accession number :
- 143783270
- Full Text :
- https://doi.org/10.1007/s12598-019-01311-5