Photoreforming
of Nonrecyclable Plastic Waste over
a Carbon Nitride/Nickel Phosphide Catalyst
Version 2 2019-09-23, 12:34Version 2 2019-09-23, 12:34
Version 1 2019-09-11, 14:40Version 1 2019-09-11, 14:40
Posted on 2019-09-23 - 12:34
With over 8 billion tons of plastic
produced since 1950, polymers
represent one of the most widely usedand most widely discardedmaterials.
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 wasteincluding microplastics
(polyester microfibers) and food-contaminated plasticand upscaling
the system from 2 to 120 mL while maintaining its efficiency for plastic
conversion.
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Uekert, Taylor; Kasap, Hatice; Reisner, Erwin (2019). Photoreforming
of Nonrecyclable Plastic Waste over
a Carbon Nitride/Nickel Phosphide Catalyst. ACS Publications. Collection. https://doi.org/10.1021/jacs.9b06872