化石燃料的脱硫是减少环境中硫含量的关键过程。这是大气污染的主要原因。传统的脱硫技术,虽然有效,通常涉及高能耗和使用苛刻的化学品。最近,光催化脱硫已经成为一种有前途的,生态友好的替代品,利用光催化剂特别是半导体异质结的潜力来提高光催化效率。本文综述了光催化脱硫反应的意义和机理,各种异质结的设计,如传统的,p-n,Z方案和S方案,它们的电荷转移机理和性质及其对光催化脱硫活性的贡献。异质结,通过组合不同的半导体材料形成,有利于有效的电荷分离和扩大光吸收范围,从而提高可见光下的光催化性能。此外,本文对近年来异质结系统在光催化脱硫活性领域的研究进展进行了详细的讨论和总结。还探讨了这一特定领域的当前局限性和挑战。最后对异质结光催化脱硫的未来研究方向和潜在的工业应用进行了展望,强调其在实现清洁能源生产和环境可持续性方面的作用。
Desulphurization of fossil fuels is a critical process in reducing the sulphur content from environment, which is a major contributor to atmospheric pollution. Traditional desulphurization techniques, while effective, often involve high energy consumption and the use of harsh chemicals. Recently,
photocatalytic desulphurization has emerged as a promising, eco-friendly alternative, leveraging the potential of photocatalysts especially semiconductor heterojunctions to enhance
photocatalytic efficiency. This review comprehensively discusses the significance and mechanism of
photocatalytic desulphurization reactions, designing of various heterojunctions such as conventional, p-n, Z-scheme and S-scheme, their charge transfer mechanism and properties and their contribution to the
photocatalytic desulphurization activity. Heterojunctions, formed by combining different semiconductor materials, facilitate efficient charge separation and broaden the light absorption range, thereby improving the photocatalytic performance under visible light. Furthermore, the recent advancements in the heterojunction systems in the field of
photocatalytic desulphurization activity have been discussed in detail and summarized. The current limitations and challenges in this particular field are also explored. The paper concludes with an outlook on future research directions and the potential industrial applications of heterojunction-powered photocatalytic desulphurization, emphasizing its role in achieving cleaner energy production and environmental sustainability.