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Multi-color polymer carbon dots synthesized from waste polyolefins through phenylenediamine-assisted hydrothermal processing.
Takahashi, Yusei; Chan, Kayee; Zinchenko, Anatoly.
Afiliação
  • Takahashi Y; Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan. Electronic address: takahashi.yusei.r7@s.mail.nagoya-u.ac.jp.
  • Chan K; Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan. Electronic address: chan.kayee.v2@s.mail.nagoya-u.ac.jp.
  • Zinchenko A; Graduate School of Environmental Studies, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8601, Japan. Electronic address: zinchenko@urban.env.nagoya-u.ac.jp.
Chemosphere ; 354: 141685, 2024 Apr.
Article em En | MEDLINE | ID: mdl-38513957
ABSTRACT
The large accumulation and low recycling rates of polyolefin waste have posed a threat to the environment and human health. The shortage of chemical recycling methods for polyolefins strongly demands the development of new and sustainable treatment technologies for hydrocarbon plastics to improve their waste management. In this study, polyethylene (PE) and polypropylene (PP) were utilized for the preparation of multi-color polymer carbon dots (PCDs) via a two-step hydrothermal (HT) synthesis involving (i) thermo-oxidative degradation of polyolefins to precursors containing plentiful oxygen-based functional groups, and (ii) modification with phenylenediamine (PDA). The fluorescence of PCDs depends on the structure of isomeric PDA and PCDs modified by ortho-, meta-, and para-PDA emit blue, green, and yellow color fluorescence, respectively. The formation mechanism of PCDs, involving dehydrative condensation and amination of PE or PP-derived precursors by PDA, was proposed. The obtained PCDs were utilized for the detection and quantification of Fe3+ ions at ppm concentrations. The proposed strategy here aims to broaden the scope of the chemical recycling methods for polyolefin plastic waste as well as to develop a conversion route of polyolefin to value-added materials.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Plásticos / Polienos / Polímeros Limite: Humans Idioma: En Revista: Chemosphere Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Plásticos / Polienos / Polímeros Limite: Humans Idioma: En Revista: Chemosphere Ano de publicação: 2024 Tipo de documento: Article