微塑料
光催化
非生物成分
化学
产甲烷
甲烷
环境化学
碳纤维
环境污染
纳米技术
环境科学
材料科学
催化作用
生态学
环境保护
有机化学
复合数
复合材料
生物
作者
Jie Ye,Yiping Chen,Chao Gao,Chao Wang,Andong Hu,Guowen Dong,Zhi Chen,Shungui Zhou,Yujie Xiong
标识
DOI:10.1002/anie.202213244
摘要
Efficient conversion of microplastics into fuels provides a promising strategy to alleviate environmental pollution and the energy crisis. However, the conventional processes are challenged by low product selectivity and potential secondary pollution. Herein, a biotic-abiotic photocatalytic system is designed by assembling Methanosarcina barkeri (M. b) and carbon dot-functionalized polymeric carbon nitrides (CDPCN), by which biodegradable microplastics-poly(lactic acid) after heat pretreatment can be converted into CH4 for five successive 24-day cycles with nearly 100 % CH4 selectivity by the assistance of additional CO2 . Mechanistic analyses showed that both photooxidation and photoreduction methanogenesis worked simultaneously via the fully utilizing photogenerated holes and electrons without chemical sacrificial quenchers. Further research validated the real-world applicability of M. b-CDPCN for non-biodegradable microplastic-to-CH4 conversion, offering a new avenue for engineering the plastic reuse.
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