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<p>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.</p>

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

  • 期刊论文

  • 发表日期：

    2025年6月13日

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

摘要

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.