![\"Converting](\"https:\/\/www.graphene-info.com\/sites\/default\/files\/2026-06\/Catalyst-Free-Graphitization-of-PET-Using-Graphene-Oxide-Templates-image.jpg\")
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PET, a major contributor to single-use plastic waste, is inherently difficult to graphitize due to its oxygen-rich composition, which typically leads to non-graphitizable char during thermal treatment. To overcome this limitation, the team introduced small amounts of graphene oxide (GO) and graphene (Gr) as structure-directing agents during carbonization and graphitization, enabling precise control over crystallite formation without relying on metal catalysts.<\/p>\n
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By systematically varying additive loading (1 wt%, 2.5 wt%, and 5 wt%) and oxygen content in GO (10 at.% and 34 at.%), the researchers identified key structural parameters governing graphitization: reactive edge oxygen content, the edge-to-basal oxygen ratio, and graphene layer accessibility. These variables directly influence how carbon atoms reorganize into ordered graphitic domains.<\/p>\n
At an optimal loading of 2.5 wt% GO with 10 at.% oxygen, the process delivered the best performance, with approximately 228% increase in lateral crystallite size (La) and ~200% increase in stacking height (Lc) compared to pure PET-derived carbon. Notably, these values exceeded those of natural graphite, indicating a highly ordered crystal structure. Among graphene additives, materials with lower stacking height showed superior templating efficiency, achieving ~167% and ~190% increases in La and Lc, respectively.<\/p>\n
GO and graphene operate through distinct but complementary pathways. In GO-assisted graphitization, oxygen functional groups at sheet edges act as active sites that promote lateral crystallite growth, while oxygen species on basal planes induce cross-linking that facilitates coherent alignment of graphitic domains. In contrast, graphene templating follows a dual-pathway mechanism: reactive edge sites initiate lateral growth (La), while the sp2-bonded basal planes enable \u03c0\u2013\u03c0 interactions that guide vertical stacking (Lc).<\/p>\n
The resulting materials consist of both graphitic carbon and hard carbon phases, offering tunable structures depending on processing conditions. Structural evolution and crystallinity were confirmed through X-ray diffraction (XRD), Raman spectroscopy, high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), and thermogravimetric analysis, with each technique providing complementary insight into the carbonization process.<\/p>\n
Importantly, the catalyst-free approach avoids the need for metals such as iron, nickel, or cobalt, which are commonly used in graphitization but require post-processing removal. “By avoiding metal catalysts, we can produce cleaner graphite while reducing chemical use and waste generation,” said author Shakshi Sekar.<\/p>\n
The study also highlights the broader application potential of PET-derived graphite in energy storage. The synthesized material exhibits large, well-ordered crystallites suitable for lithium-ion battery anodes, where graphite serves as a critical charge storage component. “Most people think of a plastic bottle as waste once they’re done using it,” Sekar said. “Our work shows that the same material can become a valuable resource for producing graphite, which is essential for modern battery technologies.”<\/p>\n
By demonstrating that waste PET can be transformed into high-quality synthetic graphite with crystallite parameters exceeding those of natural graphite, the work establishes a pathway for converting a widespread environmental liability into a high-value material. “We’re not simply finding a use for waste plastic,” Sekar said. “We’re creating a valuable material that could help support the growing demand for batteries and clean energy technologies.”<\/p>\n
The findings provide a foundation for scalable, additive-assisted carbonization processes and suggest a shift toward viewing plastic waste as a strategic feedstock for advanced energy materials. “If waste plastic can become a feedstock for advanced energy materials, it changes how we think about recycling,” Sekar said. “Instead of viewing plastic as a disposal problem, we can see it as a resource that helps support clean energy technologies.”<\/p>\n","protected":false},"excerpt":{"rendered":"Researchers at The Pennsylvania State University recently demonstrated a catalyst-free strategy to convert waste polyethylene terephthalate (PET) into…\n","protected":false},"author":2,"featured_media":514710,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[85,46,125],"class_list":["post-514709","post","type-post","status-publish","format-standard","has-post-thumbnail","category-technology","tag-il","tag-israel","tag-technology"],"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/posts\/514709","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/comments?post=514709"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/posts\/514709\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/media\/514710"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/media?parent=514709"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/categories?post=514709"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/tags?post=514709"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}