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UID:1193@biotech.technion.ac.il
DTSTART;TZID=Asia/Jerusalem:20260727T140000
DTEND;TZID=Asia/Jerusalem:20260727T143000
DTSTAMP:20260617T125434Z
URL:https://biotech.technion.ac.il/events/%d7%a1%d7%9e%d7%99%d7%a0%d7%a8-%
 d7%a1%d7%99%d7%95%d7%9d-%d7%9e%d7%92%d7%99%d7%a1%d7%98%d7%a8-%d7%a7%d7%a9%
 d7%aa-%d7%99%d7%9c%d7%99%d7%9f-%d7%9e%d7%94%d7%9e%d7%a2%d7%91%d7%93%d7%94-
 %d7%a9%d7%9c/
SUMMARY:סמינר סיום מגיסטר: קשת ילין\, מהמעבדה 
 של פרופ"ח עומר יחזקאלי
DESCRIPTION:Photo-driven valorization of polylactic acid into hydrogen fuel
  and pyruvate using a biotic-abiotic configuration\nAbstract: ** Lecture w
 ill be given in English**\nPlastics are among the most widely used materia
 ls in modern society. Polylactic acid (PLA) is employed in numerous applic
 ations\, and its demand is expected to markedly increase in the coming yea
 rs. Mechanical and chemical recycling methods can degrade PLA\; however\, 
 these are often energy-demanding and lead to polluted side streams. The in
 sufficient natural degradability of PLA raises the need for improved upcyc
 ling\, recycling\, and waste disposal techniques. Biocatalysis offers a gr
 eener approach to depolymerizing PLA into lactic acid. Proteinase-K facili
 tates the hydrolysis of the ester bonds in the PLA chains\, yielding lacti
 c acid and soluble oligomers.\nHerein\, we present a holistic approach for
  the conversion of PLA into H2 fuel under mild conditions. For that\, enzy
 matic biocatalytic PLA degradation was coupled with a photocatalyst to fac
 ilitate the photooxidation of lactic acid. In the developed system\, prote
 inase-K was employed for the depolymerization of PLA into lactic acid. The
  latter was oxidized by CdS nanoparticles (NPs) under visible-light irradi
 ation\, yielding solely pyruvate\, an essential material in the industry. 
 The photogenerated conduction electrons at the NPs simultaneously reduced 
 protons to generate H2 fuel. Furthermore\, electrochemical route for the l
 actic acid oxidation using a BiVO₄/CoP photoanode under visible-light ir
 radiation will be presented. The designed photo-electrochemical cell enabl
 es the conversion of enzymatic degraded PLA waste into electrical energy\,
  value-added chemicals and hydrogen fuel.\n
CATEGORIES:סמינרים
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