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Sustainable Recovery of CO 2 by Using Visible-Light-Responsive Crystal Cuprous Oxide/Reduced Graphene Oxide

Author

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  • Shou-Heng Liu

    (Department of Environmental Engineering, National Cheng Kung University, Tainan 70101, Taiwan)

  • Jun-Sheng Lu

    (Department of Environmental Engineering, National Cheng Kung University, Tainan 70101, Taiwan)

  • Yi-Chiun Chen

    (Department of Environmental Engineering, National Cheng Kung University, Tainan 70101, Taiwan
    Department of Resources Engineering, National Cheng Kung University, Tainan 701, Taiwan)

Abstract

A simple solution-chemistry method has been investigated to prepare crystal cuprous oxide (Cu 2 O) incorporated with reduced graphene oxide (designated as Cu 2 O-rGO- x , where x represents the contents of rGO = 1%, 5% and 10%) in this work. These Cu 2 O-rGO- x composites combine the prospective advantages of rhombic dodecahedra Cu 2 O together with rGO nanosheets which have been studied as visible-light-sensitive catalysts for the photocatalytic production of methanol from CO 2 . Among the Cu 2 O-rGO- x photocatalysts, the methanol yield photocatalyzed by Cu 2 O-rGO-5% can be observed to be 355.26 μmol g −1 cat, which is ca. 36 times higher than that of pristine Cu 2 O nanocrystal in the 20th hour under visible light irradiation. The improved activity may be attributed to the enhanced absorption ability of visible light, the superior separation of electron–hole pairs, well-dispersed Cu 2 O nanocrystals and the increased photostability of Cu 2 O, which are evidenced by employing UV-vis diffuse reflection spectroscopy, photoluminescence, scanning electron microscopy/transmission electron microscopy and X-ray photoelectron spectroscopy, respectively. This work demonstrates an easy and cost-effective route to prepare non-noble photocatalysts for efficient CO 2 recovery in artificial photosynthesis.

Suggested Citation

  • Shou-Heng Liu & Jun-Sheng Lu & Yi-Chiun Chen, 2018. "Sustainable Recovery of CO 2 by Using Visible-Light-Responsive Crystal Cuprous Oxide/Reduced Graphene Oxide," Sustainability, MDPI, vol. 10(11), pages 1-13, November.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:11:p:4145-:d:182035
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    References listed on IDEAS

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    1. John M. DeCicco, 2018. "Methodological Issues Regarding Biofuels and Carbon Uptake," Sustainability, MDPI, vol. 10(5), pages 1-15, May.
    2. Heng Rao & Luciana C. Schmidt & Julien Bonin & Marc Robert, 2017. "Visible-light-driven methane formation from CO2 with a molecular iron catalyst," Nature, Nature, vol. 548(7665), pages 74-77, August.
    3. Liu, Shou-Heng & Syu, Han-Ren, 2012. "One-step fabrication of N-doped mesoporous TiO2 nanoparticles by self-assembly for photocatalytic water splitting under visible light," Applied Energy, Elsevier, vol. 100(C), pages 148-154.
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    1. Duong Duc La & Tuan Anh Nguyen & Thanh Tung Nguyen & Ha Duc Ninh & Hoai Phuong Nguyen Thi & Tham Thi Nguyen & Duy Anh Nguyen & Trung Dung Dang & Eldon R. Rene & Soon Woong Chang & Hien Tran Thi & Dinh, 2019. "Absorption Behavior of Graphene Nanoplates toward Oils and Organic Solvents in Contaminated Water," Sustainability, MDPI, vol. 11(24), pages 1-9, December.

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