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Layered Double Hydroxides as Highly Efficient Photocatalysts for Visible Light Oxygen Generation from Water
Abstract
Oxygen generation through photocatalytic water splitting under visible light irradiation is a challenging process. In this work we have synthesized a series of Zn/Ti, Zn/Ce, and Zn/Cr layered double hydroxides (LDH) at different Zn/metal atomic ratio (from 4:2 to 4:0.25) and tested them for the visible light photocatalytic oxygen generation. The most active material was found to be (Zn/Cr)LDH with an atomic ratio of 4:2 that exhibits two absorption bands in the visible region at lambda(max) of 410 and 570 nm. It was found that the efficiency of these chromium layered double oxides for oxygen generation increases asymptotically with the Cr content. Using iron oxalate as chemical actinometer we have determined that the apparent quantum yields for oxygen generation (Phi apparent = 4 x mol oxygen/mol incident photons) are of 60.9% and 12.2% at 410 and 570 nm, respectively. These quantum yields are among the highest values ever determined with visible light for solid materials in the absence of light harvesting dye. The overall efficiency of (Zn/Cr)LDH for visible light oxygen generation was found to be 1.6 times higher than that of WO(3) under the same conditions.
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Cited by
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Qi, J., Lai, X., Wang, J., Tang, H., Ren, H., Yang, Y., Jin, Q., Zhang, L., Yu, R., Ma, G., et al. (2015) · Chemical Society Reviews · doi:10.1039/c5cs00344j · Cited by 676
Zhao, Y., Waterhouse, G. I. N., Chen, G., Xiong, X., Wu, L.-Z., Tung, C.-H., & Zhang, T. (2019) · Chemical Society Reviews · doi:10.1039/c8cs00607e · Cited by 435
Shao, M., Han, J., Wei, M., Evans, D. G., & Duan, X. (2011) · Chemical Engineering Journal · doi:10.1016/j.cej.2011.01.016 · Cited by 310
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Metadata
- Authors
- Silva, C. G., Bouizi, Y., Fornés, V., & García, H.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-09-02
- Volume
- 131
- Issue
- 38
- Pages
- 13833-13839
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2074272135
- Cited by
- 549
- References
- 0
- FWCI
- 9.35
- Type
- journal article
- Language
- en
- Open access
- closed
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- Silva, C. G., Bouizi, Y., Fornés, V., & García, H. (2009). Layered Double Hydroxides as Highly Efficient Photocatalysts for Visible Light Oxygen Generation from Water. Journal of the American Chemical Society. https://doi.org/10.1021/ja905467v
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