review · RSC Advances
Zinc oxide possesses favourable band edges for oxygen reduction and water oxidation redox potentials, yet its catalytic efficiency is constrained by electron-hole recombination. Strategic material modifications through doping and heterojunction formation offer solutions to these limitations. Uniform doping creates a new energy level that significantly enhances charge transfer and light absorption, while also altering material morphology and increasing intrinsic defects. Concurrently, forming heterojunctions facilitates charge transfer and extends electron-hole relaxation times, preventing rapid recombination. Catalytic capabilities can be amplified further by integrating noble metals with S-scheme and Z-scheme heterojunctions, which provides an effective mechanism for visible light harvesting and superior charge transport.
Zinc oxide has strong potential for chemical processes such as water oxidation and oxygen reduction, but charge recombination often degrades its performance. Understanding how uniform doping and heterojunction architectures improve charge separation and visible light absorption provides a clear route towards designing more durable, highly active materials for energy and environmental catalysis.
The insights apply to early-stage catalyst engineering for oxygen reduction and water oxidation systems. Potential end users include developers of chemical reactors and photocatalytic platforms seeking higher efficiency. Because the abstract outlines fundamental charge transfer principles and material modifications without detailing device prototyping or pilot testing, the underlying technologies remain at an early laboratory stage of development.
AI-generated from the published abstract. Always read the original work before citing.
This mini-review on doping and heterojunctions for catalysis applications provides a comprehensive overview of key aspects. Doping, when carried out adequately with a uniform distribution, creates a new energy level that significantly enhances charge transfer and light absorption. This new level alters the material's morphology and enhances intrinsic defects. For instance, ZnO, despite its exceptional band edge concerning oxygen reduction and water oxidation redox potentials, faces the issue of electron-hole recombination. However, forming a heterojunction can effectively aid charge transfer and prolong electron-hole relaxation without recombination. This is where the role of doping and heterojunctions becomes crucial. Additionally, incorporating noble metals with S- and Z-scheme heterojunctions offers a promising mechanism for charge transfer and visible light harvesting, further amplifying the catalytic properties.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.1039/d4ra02568g
Is something wrong with this record? Report it or request removal.
Discussion
Have you built on this work, tried to replicate it, or seen it applied in practice? Share what you know. Verified researchers and MARATTO™ domain experts can open a discussion, and any member can reply. Contributions are reviewed before they appear.
No discussion yet. Open the first thread.
New to MARATTO™? Create a free account.
