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Ionic‐Liquid‐Functionalized Copper Oxide Nanorods for Photocatalytic Splitting of Water

Ionic‐Liquid‐Functionalized Copper Oxide Nanorods for Photocatalytic Splitting of Water Thin films of imidazolium (Im) ionic liquids with bis(salicylato)borate (BScB) and hexafluorophosphate (PF6−) anions were grafted onto copper oxide (CuO) nanorods. Chemical and structural features of ionic‐liquid‐functionalized CuO (CuO−IL) nanorods were examined by X‐ray photoelectron spectroscopy, FTIR spectroscopy, XRD, and high‐resolution TEM analyses. The CuO−IL nanorods were demonstrated to be efficient photocatalysts for the splitting of water under visible‐light irradiation without using any sacrificial agent. The pristine CuO nanorods could not split water, whereas CuO−IL nanorods exhibited excellent photocatalytic activities and produced 1827 and 1082 μmol of hydrogen in 2 h with 20 mg of CuO−ImBScB and CuO−ImPF6 as photocatalysts, respectively. The photocatalytic activity of the CuO−IL nanorods was attributed to the synergistic effect of ionic‐liquid thin films and CuO nanorods. The trapping of photoinduced charge carriers by ionic liquids inhibits the recombination process, and consequently, the CuO nanorods facilitate the water‐splitting reaction. The CuO−IL photocatalysts were efficiently recycled without loss of catalytic activity, which revealed the stability of the ionic‐liquid thin films grafted on the CuO nanorods. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png ChemPlusChem Wiley

Ionic‐Liquid‐Functionalized Copper Oxide Nanorods for Photocatalytic Splitting of Water

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References (37)

Publisher
Wiley
Copyright
© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN
2192-6506
eISSN
2192-6506
DOI
10.1002/cplu.201600047
Publisher site
See Article on Publisher Site

Abstract

Thin films of imidazolium (Im) ionic liquids with bis(salicylato)borate (BScB) and hexafluorophosphate (PF6−) anions were grafted onto copper oxide (CuO) nanorods. Chemical and structural features of ionic‐liquid‐functionalized CuO (CuO−IL) nanorods were examined by X‐ray photoelectron spectroscopy, FTIR spectroscopy, XRD, and high‐resolution TEM analyses. The CuO−IL nanorods were demonstrated to be efficient photocatalysts for the splitting of water under visible‐light irradiation without using any sacrificial agent. The pristine CuO nanorods could not split water, whereas CuO−IL nanorods exhibited excellent photocatalytic activities and produced 1827 and 1082 μmol of hydrogen in 2 h with 20 mg of CuO−ImBScB and CuO−ImPF6 as photocatalysts, respectively. The photocatalytic activity of the CuO−IL nanorods was attributed to the synergistic effect of ionic‐liquid thin films and CuO nanorods. The trapping of photoinduced charge carriers by ionic liquids inhibits the recombination process, and consequently, the CuO nanorods facilitate the water‐splitting reaction. The CuO−IL photocatalysts were efficiently recycled without loss of catalytic activity, which revealed the stability of the ionic‐liquid thin films grafted on the CuO nanorods.

Journal

ChemPlusChemWiley

Published: May 1, 2016

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