Cubic hematite directly anchored with nanoscale gold for enhanced photocatalysis under visible light
- Authors
- Jung, Won Sik; Kook, Jeong Keun; Lee, Sang-Wha
- Issue Date
- Feb-2020
- Publisher
- ELSEVIER
- Keywords
- Cubic hematite; Hydrothermal synthesis; Gold nanoparticles; Photocatalysts; Organic dyes
- Citation
- INORGANIC CHEMISTRY COMMUNICATIONS, v.112
- Journal Title
- INORGANIC CHEMISTRY COMMUNICATIONS
- Volume
- 112
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/17619
- DOI
- 10.1016/j.inoche.2019.107688
- ISSN
- 1387-7003
- Abstract
- This paper reports the facile synthesis of amine-functionalized cubic hematite (Fe2O3) via hydrothermal reaction between Fe3+ and diamine ligand. The cubic Fe2O3 was directly anchored with negative Au seeds ( < 10 nm), which were grown into large gold nanoparticles (GNPs) using an ascorbic reducing agent. The resulting cubic Fe2O3@GNPs exhibited enhanced photocatalytic activity in the degradation of methylene blue (MB) and methyl orange (MO) dyes under visible light. The photocatalytic activity of cubic Fe2O3@GNPs was optimized by adjusting the size of GNPs and inter-particle distance between them, which were favorable for visible light absorption and separation of electro-hole pairs. Furthermore, the cubic Fe2O3@GNPs exhibited higher photocatalytic activity to the cationic MB dye than the anionic MO dye, due to its adsorption-assisted photocatalytic degradation of organic dyes. The hydrothermal synthetic route is very effective to prepare metal oxide photocatalyst with surface functionality and unique cubic shape.
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Collections - 공과대학 > 화공생명공학과 > 1. Journal Articles
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