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Mediator and Co-Catalysts-Free Direct Z-Scheme Composites of Bi2WO6-Cu3P for Solar-Water Splitting

Abstract

Exploring new single , single, active photocatalysts for solar-water splitting is highly desirable to expedite the current research on solar-chemical energy conversion. Particularly, Z-scheme-based composites (ZBC) have attracted extensive interest due to their unique charge transfer pathway, broader redox range, and stronger redox power compared to conventional heterostructures. In the present report, we for the first time explored Cu3P, a new, single photo-catalyst for solar-water splitting applications. Moreover, a novel ZBC system composed of Bi2WO6-Cu3P was designed employing a simple method of ball-milling complexation. The synthesized materials were examined and investigated through various microscopic, spectroscopic, and surface area characterizations, which have confirmed successful hybridization between Bi2WO6 and Cu3P and formation of a ZBC system that shows the ideal position of energy levels for solar-water splitting. Notably, ZBC composed of Bi2WO6-Cu3P is a mediator- and co-catalyst-free photocatalyst system. Improved photocatalytic efficiency obtained with this system compared to other ZBC systems assisted by mediators and co-catalysts establishes the critical importance of interfacial solid-solid contact and well-balanced position of energy levels for solar-water splitting. Promising solar-water splitting under optimum composition conditions highlighted the relationship between effective charge separation and composition.

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Publication details

The article was received on 26 Oct 2017, accepted on 02 Jan 2018 and first published on 03 Jan 2018


Article type: Paper
DOI: 10.1039/C7NR07952D
Citation: Nanoscale, 2018, Accepted Manuscript
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    Mediator and Co-Catalysts-Free Direct Z-Scheme Composites of Bi2WO6-Cu3P for Solar-Water Splitting

    A. rauf, M. Ma, S. Kim, Md. S. A. A. Sher Shah, C. Chung, J. H. Park and P. J. Yoo, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C7NR07952D

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