Keywords Fe O TiO nanorods array Photoelectrochemical Visible light 2 3 2 Introduction Photocatalysis using semiconductors and solar energy has received considerable attention due to the rising global energy requirement and subsequent demand for new energy sources [1–3]. Since the ﬁrst paper on photoelectrochemical (PEC) water splitting published in 1972, there have been many works focusing on this subject [4–6]. Despite the mechanism still needing to be fully understood, the current results show that the semiconductor materials as well as the electrodes assembled by the semiconductors are most important in affecting efﬁciency. Visible light utilization and charge separation are widely believed to be the most challenging for PEC. It is agreed that a stable and ﬁrm electrode with reasonable visible light absorption and promoted charge separation is an effective way to enhance the PEC efﬁciency. Fe O is a promising visible light response semiconductor because of its stability, 2 3 favorable band gap (*2.2 eV), abundance, and low cost. However, its low photoconversion efﬁciency restricts its practical application . Various strategies such as tailoring the morphology, impurity doping, and heterojunction construction have been developed to enhance the photoconversion efﬁciency [8–10]. Construct- ing a microstructured electrode for
Research on Chemical Intermediates – Springer Journals
Published: Jun 17, 2016
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