Taguchi Robust Design of Phase Transfer Catalytic Hydrolysis of Polyethylene Terephthalate (PET) Waste in Mild Conditions: Application for the Preparation of Metal–Organic Frameworks DOI Creative Commons

Asma Nouira,

Imene Bekri-Abbes, Isabel Pestana da Paixão Cansado

et al.

Solids, Journal Year: 2025, Volume and Issue: 6(1), P. 10 - 10

Published: March 6, 2025

With the rapid increase in polyethylene terephthalate (PET) usage recent years, recycling has become indispensable mitigating environmental damage and safeguarding natural resources. In this context, study presents a methodology for valorizing PET waste through phase transfer catalytic hydrolysis conducted at low temperature (80 °C) atmospheric pressure, with goal of recovering terephthalic acid (TPA) monomer. The recovered TPA monomer was subsequently utilized as precursor synthesis metal–organic frameworks (MOFs). Tributylhexadecyl phosphonium bromide (3Bu6DPB) selected catalyst due to its efficiency sustainability. process parameters, including concentration NaOH, wt.% PET, solution, were varied optimize reaction. Taguchi design an L9 (3^3) orthogonal array employed analyze influence these factors on depolymerization time. analysis variance (ANOVA) results revealed that NaOH most significant factor, contributing 93.3% efficiency, followed by (6.5%). findings also demonstrated had greatest impact (Δ = 4.27, rank 1), while smallest effect 0.16, 3). optimal conditions achieved 75 min 20 g/100 mL 12 5 PET. further organic ligand synthesize Fe(III)-TPA MOFs under mild °C 24 h). X-ray diffraction (XRD) simultaneous formation MOF-235(Fe) MIL-101(Fe), two multifunctional materials diverse properties applications. This highlights efficient approach producing low-cost promoting urban recycling, integrated strategy resource valorization.

Language: Английский

A Schiff-base-modified Cu nanocluster with redox dual-catalytic sites and fluorescence sensing for the degradation and detection of atrazine DOI

Li Wang,

Yang Chen

Materials Horizons, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Atrazine is a widely used and heavily contaminating pesticide. In this work, we designed synthesized versatile catalyst for the degradation fluorescent detection of atrazine. This consists Cu clusters modified by Schiff base. The combination base enables it to act as with dual roles oxidation reduction. inclusion also narrows band gap accelerates redox electron transfer, leading atrazine up 98%. Furthermore, red fluorescence green allow sense like sensor change in color. limit low 0.1 nM visual 10 nM. mechanisms catalysis sensing are verified mass spectrometry density functional theory. multi-functional has great application potential environmental protection, health safety other fields.

Language: Английский

Citations

0
Taguchi Robust Design of Phase Transfer Catalytic Hydrolysis of Polyethylene Terephthalate (PET) Waste in Mild Conditions: Application for the Preparation of Metal–Organic Frameworks DOI Creative Commons

Asma Nouira,

Imene Bekri-Abbes, Isabel Pestana da Paixão Cansado

et al.

Solids, Journal Year: 2025, Volume and Issue: 6(1), P. 10 - 10

Published: March 6, 2025

With the rapid increase in polyethylene terephthalate (PET) usage recent years, recycling has become indispensable mitigating environmental damage and safeguarding natural resources. In this context, study presents a methodology for valorizing PET waste through phase transfer catalytic hydrolysis conducted at low temperature (80 °C) atmospheric pressure, with goal of recovering terephthalic acid (TPA) monomer. The recovered TPA monomer was subsequently utilized as precursor synthesis metal–organic frameworks (MOFs). Tributylhexadecyl phosphonium bromide (3Bu6DPB) selected catalyst due to its efficiency sustainability. process parameters, including concentration NaOH, wt.% PET, solution, were varied optimize reaction. Taguchi design an L9 (3^3) orthogonal array employed analyze influence these factors on depolymerization time. analysis variance (ANOVA) results revealed that NaOH most significant factor, contributing 93.3% efficiency, followed by (6.5%). findings also demonstrated had greatest impact (Δ = 4.27, rank 1), while smallest effect 0.16, 3). optimal conditions achieved 75 min 20 g/100 mL 12 5 PET. further organic ligand synthesize Fe(III)-TPA MOFs under mild °C 24 h). X-ray diffraction (XRD) simultaneous formation MOF-235(Fe) MIL-101(Fe), two multifunctional materials diverse properties applications. This highlights efficient approach producing low-cost promoting urban recycling, integrated strategy resource valorization.

Language: Английский

Citations

0