Effects of size on the photocatalytic properties of high-index faceted pseudocubic and rhombohedral α-Fe2O3 nanocrystals. Issue 68 (4th December 2019)

• Record Type: Journal Article
• Authors: Wang, Zhuan; Xie, Wenyu; Yang, Bo; Song, Li; Zhao, Xueying; Khan, Aslam; Yue, Fan; Su, Xintai; Yang, Chao
• Is Part Of: RSC advances. Volume 9:Issue 68(2019)
• Page Start: 40024
• Page End: 40030
• Publication Date: 2019-12-04
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c9ra08561k
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Size-controlled and high-index faceted α-Fe2 O3 nanocrystals with pseudocubic and rhombohedral morphologies were synthesized through the hydrothermal treatment of β-FeOOH at different pHs. Abstract : Size-controlled and high-index faceted α-Fe2 O3 nanocrystals with pseudocubic and rhombohedral morphologies were synthesized through the hydrothermal treatment of β-FeOOH at different pHs. The size effect on the photocatalytic oxygen evolution efficiency of high-index faceted α-Fe2 O3 nanocrystals was investigated. Rhombohedral α-Fe2 O3 (pH 6.0) exhibits an outstanding apparent quantum yield of 9.93% and an oxygen evolution efficiency of 20.3%, which can be attributed to the optimal size and high-indexed {104} planes. This work provides a new idea for the design of high activity water oxidation catalysts, through the size optimization of high-index faceted materials.