ZnmIn2S3+m (m = 1–5, integer): A new series of visible-light-driven photocatalysts for splitting water to hydrogen
✍ Scribed by Shaohua Shen; Liang Zhao; Liejin Guo
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 971 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0360-3199
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✦ Synopsis
A new series of Zn m In 2 S 3þm (m ¼ 1e5, integer) photocatalysts was synthesized via a simple hydrothermal method. X-ray diffraction (XRD), Raman spectra, UVevisenear-IR diffuse reflectance spectra (UVevis), X-ray fluorescence (XRF) and scanning electron microscope (FESEM) were used to characterize these photocatalysts. These Zn m In 2 S 3þm photocatalysts had a similar layered crystal structure. The absorption edge of Zn m In 2 S 3þm shifted to shorter wavelength as the atomic ratio of Zn/In in the synthetic solution was increased (i.e. m increased from 1 to 5). Additionally, the morphology of Zn m In 2 S 3þm greatly depended on the atomic ratio of Zn/In. The photocatalytic activity of Zn m In 2 S 3þm was evaluated by photocatalytic hydrogen production from water under visible light. The Zn 2 In 2 S 5 product, with quantum yield at 420 nm determined to be 11.1%, had the highest photocatalytic activity among these Zn m In 2 S 3þm (m ¼ 1e5, integer) photocatalysts.