Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 315, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2022.121496
Keywords
Plastic waste; Graphitic carbon nitride; Phosphomolybdic acid; Z-scheme photocatalysts
Funding
- Key Program of National Natural Science Foundation of China [22133006]
- Natural Science Foundation of Shandong Province [ZR2020QB057]
- Fundamental Research Funds for the Central Universities [18CX02052A, 19CX05002A]
- Taishan Scholar Program of Shandong Province [ts201712019]
- Undergraduate Innovation Project of China University of Petroleum (East China) [202006039]
- Yankuang Group 2019 Science and Technology Program [YKKJ2019AJ05JG-R60]
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The increasing consumption of plastic waste has become a global pollution disaster, but a new strategy using visible light to convert plastic waste into high-value products shows promise. The study demonstrates the superior catalytic performance and efficient charge separation ability of the VPOM/CNNS heterostructure, highlighting its potential as a tool for the photo-driven upcycling of plastic waste.
The increasingly massive consumption of plastics is becoming a global pollution disaster, with serious environmental and economic problems. Here we report an efficient and sustainable strategy for the visible-light driven upcycling of various plastic wastes into high-value-added formic acid. We firstly design and fabricate a self-assembly Z-scheme heterostructure of V-substituted phosphomolybdic acid clusters/g-C3N4 nanosheets (VPOM/CNNS). The Z-scheme charge transfer process is unambiguously elucidated by transient absorption spectra and electron spin resonance studies, which endow VPOM/CNNS heterostructure with efficient charge separation and strong redox potentials. Consequently, VPOM/CNNS heterostructure displays a superior photo catalytic performance toward upcycling of various plastics. The optimal VPOM/CNNS composite exhibits a remarkable formic acid production rate of 24.66 mu mol h(-1) g-1 for upcycling of polyethylene, which is 262-fold higher than that of pristine CNNS. This work highlights the potential of Z-scheme heterojunction as an unusual tool for the photo-driven upcycling of plastic waste.
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