Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 536, Issue -, Pages 408-413Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2018.10.074
Keywords
ZnO nanotube arrays; ZnFe2O4 nanosheets; Hierarchical ZnO/ZnFe2O4 nanotube arrays; Photoelectrochemical water splitting; H-2 generation
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Funding
- National Natural Science Foundation of China [61575225, 11374377, 11074312]
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In this study, we show for the first time a hierarchical ZnO/ZnFe2O4 nanotube array photoanode for water splitting to produce hydrogen. In this photoanode, the wrinkle-like ZnFe2O4 nanosheets (NSs) are grown onto ZnO nanotube arrays through adsorption and annealing reaction. The hierarchical ZnO/ZnFe2O4 nanotube array photoanode exhibits outstanding PEC water splitting to produce hydrogen due to the remarkable visible-light harvesting ability and the large surface area of wrinkle-like ZnFe2O4 NSs. Under simulated solar light irradiation, the hierarchical ZnO/ZnFe2O4 nanotube arrays (NTAs) achieve a remarkably enhanced photocurrent density of 1.3 mA/cm(2), which is 2.2-fold higher than that of pristine ZnO NTAs at 0 V vs Ag/AgCI. Moreover, the hydrogen production rate of the hierarchical ZnO/ZnFe2O4 nanotube array photoanode is 3.6-fold higher than that of pristine ZnO nanotube array photoelectrode at 0.6 V vs Ag/AgCl. (C) 2018 Elsevier Inc. All rights reserved.
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