Hollow hematite single crystals deposited with ultra-thin Al2O3 by atom layer deposition for improved photoelectrochemical performance. Issue 32 (21st April 2017)

• Record Type: Journal Article
• Authors: Jiao, Wei; Wu, Jingrui; Cui, Siwen; Wei, Ning; Rahman, Zia Ur; Yu, Meiyan; Chen, Shougang; Zhou, Yangtao; Wang, Daoai
• Is Part Of: Dalton transactions. Volume 46:Issue 32(2017)
• Page Start: 10635
• Page End: 10640
• Publication Date: 2017-04-21
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c7dt00504k
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Hollow and single crystal α-Fe2 O3 was prepared by a hydrothermal method, which showed enhanced PEC performance on coating with ultra-thin Al2 O3 . Abstract : Hematite (α-Fe2 O3 ) is a red material with a band gap of about 2.0 eV, which indicates that it can absorb more solar light. It is a promising photocatalyst applied in many fields. In this paper, α-Fe2 O3 single crystal hollow hexagonal bipyramids were synthesized by a simple one-pot hydrothermal method. The morphology and structure of the prepared α-Fe2 O3 hollow hexagonal bipyramids were studied using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). The hollow single crystals show a good light absorption and performance in photodegradation of methylene blue (MB). Due to the strategy of depositing ultra-thin layers of Al2 O3 by atomic layer deposition (ALD), the photoelectrochemical (PEC) performance of α-Fe2 O3 under the simulated solar light irradiation is also improved.