Projects per year
Abstract
In this work, two photocatalysts (i.e., C3N4 and WO3) were successfully combined into a heterojunction structure by a facile hydrothermal method for mediator-free overall water splitting, analogous to the natural photosynthesis over a two-step photoexcitation Z-scheme system. Hydrogen and oxygen are evolved with a 2 : 1 ratio by irradiating the C3N4-WO3 composites loaded with Pt under visible light (λ > 420 nm) without any redox mediator. Introducing reduced graphene oxide (rGO) into the C3N4-WO3 composites enhances the water splitting efficiency. Through optimizing the mass ratio in the C3N4-WO3 composites, rGO content, amount of loaded Pt and pH value of the reacting system, the highest H2/O2 evolution rates of 2.84 and 1.46 μmol h−1 can be obtained, with a quantum yield of 0.9%. Our findings demonstrate that the hydrothermal method is a promising strategy for constructing intimate heterostructures for Z-scheme water-splitting systems without using any redox mediator, and that rGO can be used to further enhance the performance in optimized conditions.
Original language | English |
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Pages (from-to) | 3416-3422 |
Journal | Catalysis Science & Technology |
Volume | 5 |
Issue number | 6 |
Early online date | 28 Apr 2015 |
DOIs | |
Publication status | Published - 1 Jun 2015 |
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Dive into the research topics of 'Facile structure design based on C3N4 for mediator-free Z-scheme water splitting under visible light'. Together they form a unique fingerprint.Projects
- 4 Finished
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Inorganic Bulk Heterojunction: Inorganic Bulk Heterojunction for high efficiency in solar cell devices
Irvine, J. T. S. (PI), Connor, P. A. (CoI) & Xu, X. (CoI)
1/08/13 → 31/07/16
Project: Standard
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Supergen RGU 2013: Photocatalytic Bioethanol Production
Irvine, J. T. S. (PI)
1/07/13 → 30/06/17
Project: Standard
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Energy Materials Discovery: Energy Materials Discovery Characterisation and Application
Irvine, J. T. S. (PI), Cassidy, M. (CoI), Connor, P. A. (CoI), Savaniu, C. D. (CoI) & Zhou, W. (CoI)
7/01/13 → 6/01/18
Project: Standard