Carbon quantum dots derived from waste acorn cups and its application as an ultraviolet absorbent for polyvinyl alcohol film

This study provides a new way for the clean and high-valued-added utilization of waste acorn cups, discusses the process and mechanism of extracting CQDs from ACs, and applies it to UV light conversion system of PVA film

Nan Xu

2021

Scholarcy highlights

  • Extracting effective ultraviolet absorbent from biomass-based material is urgent for the sustainable development
  • The active surface groups of 1-CQDs include Ph-OH, OH, and COOH, etc., while for 2-CQDs, nitrogen doping provides a large number of nitrogen atoms, so that the active functional groups include CNH2, CNC, CNH and CONH, etc
  • The carbon network of 1-CQDs is dominant for blue emission, the subordinate blue-green emission is derived from ellagitannin
  • For 2-CQDs, green emission comes from the flavonoid produced during hydrothermal carbonization and nitrogen doping processes
  • This study provides a new way for the clean and high-valued-added utilization of waste acorn cups, discusses the process and mechanism of extracting CQDs from ACs, and applies it to UV light conversion system of PVA film
  • It presents a reference for the development of a new generation of UV absorbents

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