Low temperature fabrication of Fe2O3 nanorod film coated with ultra-thin g-C3N4 for a direct z-scheme exerting photocatalytic activities

Title
Low temperature fabrication of Fe2O3 nanorod film coated with ultra-thin g-C3N4 for a direct z-scheme exerting photocatalytic activities
Author
이선영
Keywords
VISIBLE-LIGHT IRRADIATION; ENHANCED PHOTOELECTROCHEMICAL PERFORMANCE; HYDROGEN-PRODUCTION; FACILE SYNTHESIS; HYBRID PHOTOCATALYSTS; WATER; ALPHA-FE2O3; EFFICIENT; DEGRADATION; TIO2
Issue Date
2018-10
Publisher
ROYAL SOC CHEMISTRY
Citation
RSC ADVANCES, v. 8, No. 59, Page. 33600-33613
Abstract
We engineered high aspect ratio Fe2O3 nanorods (with an aspect ratio of 17 : 1) coated with g-C3N4 using a sequential solvothermal method at very low temperature followed by a thermal evaporation method. Here, the high aspect ratio Fe2O3 nanorods were directly grown onto the FTO substrate under relatively low pressure conditions. The g-C3N4 was coated onto a uniform Fe2O3 nanorod film as the heterostructure, exhibiting rational band conduction and a valence band that engaged in surface photoredox reactions by a direct z-scheme mechanism. The heterostructures, particularly 0.75g-C3N4@Fe2O3 nanorods, exhibited outstanding photocatalytic activities compared to those of bare Fe2O3 nanorods. In terms of 4-nitrophenol degradation, 0.75g-C3N4@Fe2O3 nanorods degraded all of the organic pollutant within 6 h under visible irradiation at a kinetic constant of 12.71 x 10(-3) min(-1), about 15-fold more rapidly than bare Fe2O3. Further, the hydrogen evolution rate was 37.06 mmol h(-1) g(-1), 39-fold higher than that of bare Fe2O3. We suggest that electron and hole pairs are efficiently separated in g-C3N4@Fe2O3 nanorods, thus accelerating surface photoreaction via a direct z-scheme under visible illumination.
URI
https://pubs.rsc.org/en/content/articlehtml/2018/ra/c8ra04499fhttp://repository.hanyang.ac.kr/handle/20.500.11754/81442
ISSN
2046-2069
DOI
10.1039/c8ra04499f
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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