Encapsulation of Carbon-Nanodots into Metal-Organic Frameworks for Boosting Photocatalytic Upcycling of Polyvinyl Chloride Plastic

23 Pages Posted: 28 Jun 2023

See all articles by Jibo Qin

Jibo Qin

affiliation not provided to SSRN

Yibo Dou

Beijing University of Chemical Technology

Jianchi Zhou

Beijing University of Chemical Technology

Tobias Orlander

DTU Sustain

Henrik Rasmus Andersen

Technical University of Denmark

Claus Hélix-Nielsen

Technical University of Denmark

Wenjing (Angela) Zhang

Harbin Institute of Technology

Abstract

Although polyvinyl chloride (PVC) ranks as the third most mass-produced synthetic plastic, the chemical upcycling of non-biodegradable PVC waste remains a significant challenge. Herein, novel carbon nanodots (CDs)-embedded metal-organic framework (MOF) that CDs/Zr-MOF photocatalyst is fabricated for upcycling of PVC. Specifically, the ultra-small-sized CDs (~2.0 nm) are encapsulated into Zr-MOF pores via a mild pyrolysis strategy. The maintained MOF structure facilitates charge/mass transfer and improves the surface-to-volume ratio of active sites of CDs. The CDs/Zr-MOF exhibits high activity for PVC conversion of ~76.5% towards acetic acid with a yield of ~14%. The mechanism investigation indicates the generated •OH radicals can efficiently trigger cleavage of C-Cl/C-C bonds of PVC. Moreover, the reduction of the energy barrier for the hydroxylation reaction as a rate-limiting step contributed to improved PVC conversion performance. This work offers a feasible method for fabricating nanoparticle-embedded MOF-based photocatalysts and provides new insights into the chemical upcycling of plastics.

Keywords: polyvinyl chloride, mild pyrolysis, CDs/Zr-MOF photocatalyst, acetic acid

Suggested Citation

Qin, Jibo and Dou, Yibo and Zhou, Jianchi and Orlander, Tobias and Andersen, Henrik Rasmus and Hélix-Nielsen, Claus and Zhang, Wenjing (Angela), Encapsulation of Carbon-Nanodots into Metal-Organic Frameworks for Boosting Photocatalytic Upcycling of Polyvinyl Chloride Plastic. Available at SSRN: https://ssrn.com/abstract=4493998 or http://dx.doi.org/10.2139/ssrn.4493998

Jibo Qin

affiliation not provided to SSRN ( email )

No Address Available

Yibo Dou

Beijing University of Chemical Technology ( email )

15 N. 3rd Ring Rd E
Chaoyang, Beijing, 201204
China

Jianchi Zhou

Beijing University of Chemical Technology ( email )

15 N. 3rd Ring Rd E
Chaoyang, Beijing, 201204
China

Tobias Orlander

DTU Sustain ( email )

Anker Engelunds Vej 1
Building 101A
Kgs. Lyngby, 2800
Denmark

Henrik Rasmus Andersen

Technical University of Denmark ( email )

Claus Hélix-Nielsen

Technical University of Denmark ( email )

Anker Engelunds Vej 1
Building 101A
Lyngby, 2800
Denmark

Wenjing (Angela) Zhang (Contact Author)

Harbin Institute of Technology ( email )

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