Accounts of Chemical Research· 2026Q1
S-Scheme Shapes Heterojunction Photocatalysis
- 146citations
- Q1SCImago
- 2026year
Short summary
This Account details the evolution of S-scheme heterojunctions, a photocatalytic mechanism, across diverse materials like perovskites, QDs, polymers, MOFs, and COFs, validated by advanced in situ characterization techniques.
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Key points
- S-scheme heterojunctions have been expanded to encompass a wide range of materials including perovskites, QDs, conjugated polymers, MOFs, and COFs.
- Advanced in situ characterization techniques such as ISIXPS, KPFM, EPR, XAS, and fs-TAS are crucial for validating the S-scheme mechanism and charge transfer dynamics.
- Strategies like composition tuning, defect modulation, and interfacial bonding engineering are key to optimizing photogenerated carrier separation and photocatalytic efficiency.
- The internal electric field, band bending, and charge flow pathways can be precisely controlled to maximize photocatalytic performance.
AI-generated from the title and abstract; the full text is not read.
Abstract
system supported by in situ irradiated X-ray photoelectron spectroscopy (ISIXPS)─we have expanded its material scope across multiple dimensional architectures, including perovskite materials, semiconducting quantum dots (QDs), conjugated polymers (CP), metal-organic frameworks (MOFs), and covalent-organic frameworks (COFs). To validate the S-scheme mechanism, elucidate charge transfer dynamics, and resolve reaction mechanisms, we have employed an array of state-of-the-art characterization techniques, such as light-irradiated Kelvin probe force microscopy (KPFM), in situ electron paramagnetic resonance (EPR), in situ X-ray absorption spectroscopy (XAS), and femtosecond-transient absorption spectroscopy (fs-TAS).Our most recent efforts focus on composition tuning, defect modulation, and interfacial bonding engineering to optimize the separation and lifetime of photogenerated carriers. Through these strategies, we aim to reinforce the internal electric field, regulate band bending, and precisely control charge flow pathways, ultimately maximizing photocatalytic efficiency. This Account provides a concise yet comprehensive overview of the evolution of SH, with emphasis on the design principles and advanced characterization techniques developed and adopted by our group. We summarize key strategies for engineering SH tailored for enhanced charge carrier separation and highlight their applications in major photocatalytic reactions. Finally, we outline promising future directions for the field.
The authors' abstract, as published at the source. Accounts of Chemical Research, 2026 · DOI ↗
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Field: Renewable Energy, Sustainability and the Environment
Renewable Energy, Sustainability and the EnvironmentEnergy