Fundamentals and challenges for indirect and direct photocatalytic conversion of plastic wastes into valuable fuels

IF 9.7 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Science China Chemistry Pub Date : 2025-06-13 DOI:10.1007/s11426-025-2631-5

Qinyuan Hu, Jiawei Xie, Dongpo He, Zhixing Zhang, Jinyu Ding, Mengqian Li, Wenya Fan, Piming Ma, Xingchen Jiao

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Abstract

Nowadays, plastic wastes have seriously endangered human health and ecological safety. Recycling plastics is a promising approach to achieve multiple uses of carbon resources. In this review, photocatalysis is introduced for the conversion of plastics into various valuable chemicals. The state-of-the-art photocatalytic techniques for plastic conversion are divided into two categories: direct and indirect photoconversion. We summarize in detail the photocatalytic small organic molecules conversion from polyethylene terephthalate, polylactic acid and polyethylene through the alkaline-assistant and hydrothermal pretreatments. Then, we overview the effective strategies of direct photoconverting polyethylene, polylactic acid and polyvinyl chloride into chemicals via the two-step process, amination strategy, and single reactive oxygen species-assistant strategy. Finally, we present some outlook on the current challenges and propose some potential solutions in the future.

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塑料废物间接和直接光催化转化为有价值燃料的基本原理和挑战

如今，塑料垃圾已经严重危害人类健康和生态安全。塑料回收是实现碳资源多重利用的一种很有前途的方法。本文介绍了光催化将塑料转化为各种有价化学品的研究进展。最先进的光催化塑料转化技术分为两类：直接光转化和间接光转化。本文详细介绍了光催化小分子有机分子转化的方法，包括碱辅助和水热预处理。然后，我们概述了直接光转化聚乙烯、聚乳酸和聚氯乙烯的有效策略，包括两步法、胺化策略和单活性氧辅助策略。最后，我们对当前面临的挑战进行了展望，并提出了未来可能的解决方案。

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来源期刊

Science China Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

14.40

自引率

7.30%

发文量

3787

审稿时长

2.2 months

期刊介绍： Science China Chemistry, co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China and published by Science China Press, publishes high-quality original research in both basic and applied chemistry. Indexed by Science Citation Index, it is a premier academic journal in the field. Categories of articles include: Highlights. Brief summaries and scholarly comments on recent research achievements in any field of chemistry. Perspectives. Concise reports on thelatest chemistry trends of interest to scientists worldwide, including discussions of research breakthroughs and interpretations of important science and funding policies. Reviews. In-depth summaries of representative results and achievements of the past 5–10 years in selected topics based on or closely related to the research expertise of the authors, providing a thorough assessment of the significance, current status, and future research directions of the field.