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Updated: May 22, 2025
Preparation and Use of Photocatalytically Active Segmented Ag|ZnO and Coaxial TiO2-Ag Nanowires Made by Templated Electrodeposition
Published on: May 2, 2014
Constructing Z-scheme between graphite nitride carbon and supramolecular zinc porphyrin to promote photocatalytic H2
Jun Li1, Xiaoqian Ju2, Xiangbo Feng2
1Technological Institute of Materials & Energy Science (TIMES), Xi'an Key Laboratory of Advanced Photo-electronics Materials and Energy Conversion Device, School of Electronic Information, Xijing University, Xi'an 710123, China; State Key Laboratory of Electrical Insulation and Power Equipment, Center of Nanomaterials for Renewable Energy, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
Abstract:
The separation and transport of charge carriers between heterojunction interfaces are key factors that constrain their photocatalytic activity. In current study, a new binary heterojunction (BCN-N-SA) composed of g-C3N4 nanosheet (BCN-N) and self-assembled supramolecular zinc porphyrin (SA-ZnTCPP) was successfully synthesized for photocatalytic hydrogen evolution (PHE) from water splitting. The optimal PHE rate of BCN-N-SA reaches 23.895 mmol g-1 h-1, which is 38.05, 6.93 and 6.75 times higher than that of unassembled ZnTCPP, SA-ZnTCPP and BCN-N, respectively. It is revealed that a Z-scheme mechanism between BCN-N and SA-ZnTCPP has been constructed in BCN-N-SA, which efficiently promotes the separation and transport of photogenerated charge carriers, thereby greatly improving the PHE efficiency. This work indicates that constructing the Z-scheme mechanism through band regulation is an effective method to improve the PHE efficiency.
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