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Modular Construction of Prussian Blue Analog and TiO2 Dual‐Compartment Janus Nanoreactor for Efficient Photocatalytic Water Splitting
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Modular Construction of Prussian Blue Analog and TiO2 Dual‐Compartment Janus Nanoreactor for Efficient Photocatalytic Water Splitting
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Journal Article
Modular Construction of Prussian Blue Analog and TiO2 Dual‐Compartment Janus Nanoreactor for Efficient Photocatalytic Water Splitting
2021
Overview
Janus structures that include different functional compartments have attracted significant attention due to their specific properties in a diverse range of applications. However, it remains challenge to develop an effective strategy for achieving strong interfacial interaction. Herein, a Janus nanoreactor consisting of TiO2 2D nanocrystals integrated with Prussian blue analog (PBA) single crystals is proposed and synthesized by mimicking the planting process. In situ etching of PBA particles induces nucleation and growth of TiO2 nanoflakes onto the concave surface of PBA particles, and thus enhances the interlayer interaction. The anisotropic PBA–TiO2 Janus nanoreactor demonstrates enhanced photocatalytic activities for both water reduction and oxidation reactions compared with TiO2 and PBA alone. As far as it is known, this is the first PBA‐based composite that serves as a bifunctional photocatalyst for solar water splitting. The interfacial structure between two materials is vital for charge separation and transfer based on the spectroscopic studies. These results shed light on the elaborate construction of Janus nanoreactor, highlighting the important role of interfacial design at the microscale level. The 2D nanocrystals can grow on etched faces of metal–organic framework (MOF) single crystals to form Janus nanoreactor. The rational interface engineering of Janus nanoreactor is the key to realizing efficient photocatalytic water reduction and oxidation reactions. This work opens up a new window for the design and construction of Janus nanoreactor as promising heterojunction photocatalysts.
Publisher
John Wiley and Sons Inc,Wiley
