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Photoreforming of Nonrecyclable Plastic Waste over a Carbon Nitride/Nickel Phosphide Catalyst
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Abstract With over 8 billion tons of plastic produced since 1950, polymers represent one of the most widely used─and most widely discarded─materials. Ambient-temperature photoreforming offers a simple and low-energy means for transforming plastic waste into fuel and bulk chemicals but has previously only been reported using precious-metal- or Cd-based photocatalysts. Here, an inexpensive and nontoxic carbon nitride/nickel phosphide (CNx|Ni2P) photocatalyst is utilized to successfully reform poly(ethylene terephthalate) (PET) and poly(lactic acid) (PLA) to clean H2 fuel and a variety of organic chemicals under alkaline aqueous conditions. Ni2P synthesized on cyanamide-functionalized carbon nitride is shown to promote efficient charge separation and catalysis, with a photostability of at least 5 days. The real-world applicability of photoreforming is further verified by generating H2 and organics from a selection of nonrecyclable waste─including microplastics (polyester microfibers) and food-contaminated plastic─and upscaling the system from 2 to 120 mL while maintaining its efficiency for plastic conversion.
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Metadata
- Authors
- Uekert, T., Kasap, H., & Reisner, E.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2019-08-29
- Volume
- 141
- Issue
- 38
- Pages
- 15201-15210
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2970296536
- Cited by
- 697
- References
- 44
- FWCI
- 8.81
- Type
- journal article
- Language
- en
- Open access
- hybrid
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