Bandgap tuning and photocatalytic activities of CuSe1–xSx nanoflakes. Issue 1 (January 2016)

• Record Type: Journal Article
• Authors: Ni, Shuaishuai; Su, Yanjie; Ai, Zhe; Hu, Jing; Yang, Zhi; Kong, Eric Siu-Wai; Zhang, Yafei
• Is Part Of: Ceramics international. Volume 42:Issue 1:Part A(2016)
• Page Start: 211
• Page End: 219
• Publication Date: 2016-01
• Subjects: A. Powders: chemical preparation -- B. Nanocomposites -- C. Optical properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.08.092
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Hexagonal CuSe1− x S x nanoflakes with 200–600 nm edge in length and 15–20 nm thick have been successfully synthesized via a concentrated alkaline hydrothermal method from CuCl, Se and S powders. Experimental results indicate that the reaction conditions such as NaOH concentration, reaction temperature, surfactant category and Cu source greatly affect the morphology of as-synthesized CuSe1− x S x nanoflakes. Moreover, their bandgaps are tunable as a function of x (0.1–0.5), which can be easily realized by changing the ratio of Se/S in the starting mix. The photocatalytic degradation of organic methylene blue (MB) with CuSe1− x S x and H2 O2 addition under visible light irradiation has also been studied. Degradation time for the MB aqueous solution (2×10 −5 M) was about 15 min for CuSe1− x S x nanoflakes with different x values (0.1–0.5), indicating the excellent photocatalytic activities of the hexagonal CuSe1− x S x nanoflakes.