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Issue 3, 2018
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Highly ordered ZnO/ZnFe2O4 inverse opals with binder-free heterojunction interfaces for high-performance photoelectrochemical water splitting

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Abstract

Highly ordered heteronanostructures with binder-free interfaces are the key factors in developing high-performance photoanodes. Here, we design and fabricate three-dimensional ordered macroporous ZnO/ZnFe2O4 inverse opals with binder-free heterojunction interfaces that improve the separation of photogenerated charge carriers. The well-defined ZnO/ZnFe2O4 inverse opal displays a high photoconversion efficiency of 0.81% at 0.38 V versus the RHE without any co-catalyst assistance, which is over 6 times higher than that of the pristine ZnO sample (0.13% at 0.65 V vs. the RHE). Furthermore, the photoanode is quite stable even after 10 h of continuous illumination with a slight photocurrent decay of 4.9% (88.0% loss for the pristine ZnO). The high performances of the ZnO/ZnFe2O4 inverse opals can be attributed to the improved interfacial charge carrier separation based on electrochemical analysis and first-principles calculations. This work may provide more insights into the design of highly efficient photoanodes for photoelectrochemical applications.

Graphical abstract: Highly ordered ZnO/ZnFe2O4 inverse opals with binder-free heterojunction interfaces for high-performance photoelectrochemical water splitting

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Publication details

The article was received on 05 Sep 2017, accepted on 09 Dec 2017 and first published on 11 Dec 2017


Article type: Paper
DOI: 10.1039/C7TA07798J
Citation: J. Mater. Chem. A, 2018,6, 1210-1218
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    Highly ordered ZnO/ZnFe2O4 inverse opals with binder-free heterojunction interfaces for high-performance photoelectrochemical water splitting

    T. Yang, J. Xue, H. Tan, A. Xie, S. Li, W. Yan and Y. Shen, J. Mater. Chem. A, 2018, 6, 1210
    DOI: 10.1039/C7TA07798J

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