Evaluation of Sodium/Protonated Titanate Nanotubes Catalysts in Virgin and Post Consumer PET Depolymerization

Lima, Gabrielle Ritter; Monteiro, Wesley F.; Scheid, Carolina Majolo; Ligabue, Rosane Angélica; Santana, Ruth M. C.

doi:10.1007/s10562-019-02724-8

Cited by 20 publications

(13 citation statements)

References 55 publications

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“…Fe 3 O 4 nanoparticle was immobilized on boron nitride nanosheets to recycle PET wastes by glycolysis (Nabid et al 2019 ). Sodium or protonated titanate nanotubes were used for the post-consumer and virgin PET degradation (Lima et al 2019 ). Still the effect of such nanomaterial to the dynamic environment condition and their stability have to be explored in detail.…”

Section: Remediationmentioning

confidence: 99%

Occurrence, toxicity and remediation of polyethylene terephthalate plastics. A review

et al. 2022

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Polyethylene terephthalate is a common plastic in many products such as viscose rayon for clothing, and packaging material in the food and beverage industries. Polyethylene terephthalate has beneficial properties such as light weight, high tensile strength, transparency and gas barrier. Nonetheless, there is actually increasing concern about plastic pollution and toxicity. Here we review the properties, occurrence, toxicity, remediation and analysis of polyethylene terephthalate as macroplastic, mesoplastic, microplastic and nanoplastic. Polyethylene terephthalate occurs in groundwater, drinking water, soils and sediments. Plastic uptake by humans induces diseases such as reducing migration and proliferation of human mesenchymal stem cells of bone marrow and endothelial progenitor cells. Polyethylene terephthalate can be degraded by physical, chemical and biological methods.

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Section: Remediationmentioning

confidence: 99%

Occurrence, toxicity and remediation of polyethylene terephthalate plastics. A review

et al. 2022

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“…In their work, Misaki and co-workers, hydrogen titanate (H 2 Ti 3 O 7 ) nanotubes were synthesized at low temperature for the first time using a new facile technique where amorphous TiO 2 nanoparticles with the large surface area were employed as precursors for the preparation of the catalysts at room temperature. Na + was introduced into the amorphous TiO 2 (a-TiO 2 ) nanoparticles at ambient temperature, followed by an ion-exchange process to synthesize H 2 Ti 3 O 7 nanotubes [ 82 ]. The amorphous TiO 2 (a-TiO 2 ) used in their study was synthesized using 1.4 g of titanium tetraisopropoxide (TTIP) which was mixed with 30 g of organic solvent (1-butanol (BtOH), diethyl ether (Et2O), hexane (Hex), ethanol (EtOH), acetone (Ace), isopropanol (IPA), and tetrahydrofuran (THF)).…”

Section: Exploitations Of Titanate Nanotubes Catalysts In Chemical Processesmentioning

confidence: 99%

“…However, the surface area of 408 m 2 /g obtained was lower than the materials synthesized at room temperature; both catalysts were used to transform bio-derived glucose into 5-(hydroxymethyl) furfural. For clarification, the H 2 Ti 3 O 7 samples produced at ambient temperature from a-TiO 2 and by hydrothermal treatment from P25-TiO 2 were tagged HTO-RT and HTO-HT, respectively [ 82 ].…”

Section: Exploitations Of Titanate Nanotubes Catalysts In Chemical Processesmentioning

confidence: 99%

“…Interestingly, HTO-RT also demonstrated a higher HMF yield from fructose than HTO-HT. It was concluded that the higher yield obtained for HMF over HTO-RT catalyst could be credited to possession of more Brønsted acid sites on the surface of nanotube than HTO-HT regarding the high surface area reported for HTO-RT [ 82 ].

Figure 6 TEM images of raw materials and HTO samples: a commercially available P25-TiO 2 , b H 2 Ti 3 O 7 nanotubes synthesized by conventional hydrothermal method from P25-TiO 2 , c amorphous TiO 2 , and d H 2 Ti 3 O 7 nanotubes synthesized at room temperature from amorphous TiO 2 .…”

Section: Exploitations Of Titanate Nanotubes Catalysts In Chemical Processesmentioning

confidence: 99%

“…

Figure 7 HMF yield from glucose or fructose under the catalysts. HMF yield.…”

Section: Exploitations Of Titanate Nanotubes Catalysts In Chemical Processesmentioning

confidence: 99%

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One-dimensional titanate nanotube materials: heterogeneous solid catalysts for sustainable synthesis of biofuel precursors/value-added chemicals—a review

et al. 2021

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Graphical Abstract One-dimensional (1D) titanate nanotubes materials (protonated titanate nanotube (HTNT) and sodium titanate nanotube (NaTNT)) have been reported as low-cost and efficient catalytic materials in chemical syntheses for the production of biofuel precursors with interesting catalytic performance exhibited, even better than some commonly used zeolites, H-MOR, H-β, SO 4 2− /Al 2 O 3 , and H-ZSM-5 solid catalysts with environmental benign in focus when compared with homogeneous catalytic materials. This mini-review expressly revealed the significance and potential of using HTNT and NaTNT as sustainable and environmentally benign solid catalysts/supports in various chemical reactions. The critical assessment of biomass valorization and titanate nanostructured materials as catalysts/supports via Green Chemistry approach, #7 (use of renewable feedstocks), #9 (use of catalyst against stoichiometry) and United Nations (UN) Sustainable Development Goals (SDGs), #7 (affordable and clean energy; ensure access to inexpensive, reliable, sustainable, and new energy), is presented as integrated pathways to meet environmental benign technology toward sustainability. Hence, this work follows in the pattern of recent formulated features reported for solid catalysts—‘ PYSSVR ’ concept, which means P–production cost, Y–yield, S–stability, S–selectivity, V–versatility, and R–reusability.

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Insights into the depolymerization of polyethylene terephthalate in methanol

Wang

Liu

et al. 2022

J of Applied Polymer Sci

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With concern to sustainable development, it is necessary to establish a recycling process of polyethylene terephthalate (PET). Methanolysis of PET is promising for chemical recovery of PET and the products are mainly dimethyl terephthalate (DMT) and ethylene glycol (EG), but the conditions of state‐of‐art depolymerization are severe. Here, we synthesized ionic liquid [HO3S‐(CH2)3‐NEt3]Cl‐[ZnCl2]0.67 with Brönsted–Lewis di‐acid and used it to efficiently catalyze the methanolysis of PET (mmethanol:mPET about 4) at milder temperature of 195°C with yield of DMT about 78.4%. Reaction kinetics was studied and the result indicated the depolymerization of PET was a first‐order kinetic reaction with the apparent activation energy of DMT formation about 17.63 kJ mol−1. Random sampling experiment was also conducted and the results showd that DMT was the product of deep depolymerization of PET and two methanol molecules were needed to form DMT and EG in the depolymerization process. This study provides an efficient method to the recycling use of PET and wais significant to waste recovery and green environment.

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Evaluation of Sodium/Protonated Titanate Nanotubes Catalysts in Virgin and Post Consumer PET Depolymerization

Cited by 20 publications

References 55 publications

Occurrence, toxicity and remediation of polyethylene terephthalate plastics. A review

Occurrence, toxicity and remediation of polyethylene terephthalate plastics. A review

One-dimensional titanate nanotube materials: heterogeneous solid catalysts for sustainable synthesis of biofuel precursors/value-added chemicals—a review

Insights into the depolymerization of polyethylene terephthalate in methanol

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