TY - JOUR
T1 - Sustainable recovery of CO2 by using visible-light-responsive crystal cuprous oxide/reduced graphene oxide
AU - Liu, Shou Heng
AU - Lu, Jun Sheng
AU - Chen, Yi Chiun
N1 - Funding Information:
Supplementary Materials: The following are available online at http://www.mdpi.com/2071-1050/10/11/4145/ Supplementary Materials: The following are available online at www.mdpi.com/link, Figure S1: XRD patterns oAuthorf the fresContributions:h and used photDesigning,ocatalysts awriting,fter 20 hroeviewf photo&caeditingtalytic reathectiopanp.er, S.-H.L.; analyzing the data, J.-S.L. All authors reviewed and approved the manuscript. Acknowledgments: We are gratefully appreciated the support of this study by the Ministry of Science and Acknowledgments: We are gratefully appreciated the support of this study by the Ministry of Science and Technology of Taiwan (grant number: MOST 105-2221-E-006-015-MY5). Author Contributions: Designing, writing, review & editing the paper, S.-H.L.; doing the experiments and Conflicts of Interest: The authors declare no conflict of interest. analyzing the data, J.-S.L. All authors reviewed and approved the manuscript.
Publisher Copyright:
© 2018 by the authors.
PY - 2018/11/11
Y1 - 2018/11/11
N2 - A simple solution-chemistry method has been investigated to prepare crystal cuprous oxide (Cu2O) incorporated with reduced graphene oxide (designated as Cu2O-rGO-x, where x represents the contents of rGO = 1%, 5% and 10%) in this work. These Cu2O-rGO-x composites combine the prospective advantages of rhombic dodecahedra Cu2O together with rGO nanosheets which have been studied as visible-light-sensitive catalysts for the photocatalytic production of methanol from CO2. Among the Cu2O-rGO-x photocatalysts, the methanol yield photocatalyzed by Cu2O-rGO-5% can be observed to be 355.26 μmol g-1 cat, which is ca. 36 times higher than that of pristine Cu2O 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 Cu2O nanocrystals and the increased photostability of Cu2O, 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 CO2 recovery in artificial photosynthesis.
AB - A simple solution-chemistry method has been investigated to prepare crystal cuprous oxide (Cu2O) incorporated with reduced graphene oxide (designated as Cu2O-rGO-x, where x represents the contents of rGO = 1%, 5% and 10%) in this work. These Cu2O-rGO-x composites combine the prospective advantages of rhombic dodecahedra Cu2O together with rGO nanosheets which have been studied as visible-light-sensitive catalysts for the photocatalytic production of methanol from CO2. Among the Cu2O-rGO-x photocatalysts, the methanol yield photocatalyzed by Cu2O-rGO-5% can be observed to be 355.26 μmol g-1 cat, which is ca. 36 times higher than that of pristine Cu2O 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 Cu2O nanocrystals and the increased photostability of Cu2O, 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 CO2 recovery in artificial photosynthesis.
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U2 - 10.3390/su10114145
DO - 10.3390/su10114145
M3 - Article
AN - SCOPUS:85056417844
VL - 10
JO - Sustainability
JF - Sustainability
SN - 2071-1050
IS - 11
M1 - 4145
ER -