Polyethylene terephthalate (PET) recycling: A review

Case Studies in Chemical and Environmental Engineering, Journal Year: 2024, Volume and Issue: 9, P. 100673 - 100673

Published: Feb. 23, 2024

It is difficult to reuse wastes from polymers due the mismatch between amount of contaminants and secondary quality feed. This type operation much more expensive cost-effective than production polymer raw materials latest materials. However, recyclable beneficial if used extensively in various concrete products wood-polymer boards. done only cleaning sorting are not particularly important for products. Polyethylene terephthalate (PET) a widely industries its excellent physical chemical properties. Besides, increasing use PET has led global crisis waste management, as improper disposal caused significant environmental damage. major source accumulated landfills, address this issue, recycling methods have evolved. In regard, present review examines techniques involved PET. Conventional influence diverse depolymerization reaction variables were discussed, upsides downsides each technique considered. The summarizes advances technologies plastic waste, focusing on bio-recycling PET, aiming sustainable, economical solutions circular economy.

Language: Английский

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Nano titanium oxide (nano-TiO2): A review of synthesis methods, properties, and applications

Case Studies in Chemical and Environmental Engineering, Journal Year: 2024, Volume and Issue: 9, P. 100626 - 100626

Published: Jan. 24, 2024

Nanoparticles have revolutioned materials secience and manufacturing industry thanks to their ultrafine scale. Nano-scale titanium oxide (nano-TiO2) are key elements of a wide variety sectors advanced materials, devices, systems in view versatility extraordinary characetristics, mainly optical, electrical catalytic properties. Thnaks aforementioned features, they found position different industries such as colors pigments, photocatalysts, photovoltaic solar cells, adsorbents, cosmetics, electric electronic devices. Nano-SiO2 application gives rise range properties performance, which severely depends on particle size, size distribution, agglomeration the bulk host or systems. When used surface coating additive even functionalized, nano- TiO2 takes more roles, state-of-the-art depending synthesis method. Therefore, review synthesis, properties, surface- bulk-functionalization/modification (respectively with function groups doping) methods achieving high-performance seems essential. In this review, background information developments from pure Titanium Oxide chemically modified -based photocatalysts were discussed detail, Photocatalytic activity oxide-based nitrogen group pollutant decomposition. It also Vehicle for Chemotherapeutics Other Applications Medicine an overview factors affecting been reviewed.

Language: Английский

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Effect and investigating of graphene nanoparticles on mechanical, physical properties of polylactic acid polymer

Case Studies in Chemical and Environmental Engineering, Journal Year: 2024, Volume and Issue: 9, P. 100612 - 100612

Published: Jan. 11, 2024

Polylactic acid (PLA) is a linear aliphatic polyester thermoplastic made from renewable sources such as sugar beet and cornstarch. Methods of preparation polylactic are biological chemical. The advantages biocompatibility, easily processing, low energy loss, transparency, high strength, resistance to water fat penetration consumption carbon dioxide during production. However, has disadvantages hydrophobicity, fragility at room temperature, thermal resistance, slow degradation rate, permeability gases, lack active groups chemical neutrality. To overcome the limitations acid, stability inability absorb nanoparticles graphene added improve its properties. Samples were prepared by solution casting method using chloroform solvent in thin films. mechanical, thermal, structural properties pure acid/graphene nanocomposites studied tensile Test X-ray diffraction (XRD), Root mean square (RMS) Differential Scanning Calorimetry (DSC). Also, exposing samples Ultraviolet (UV) rays then performing test, produced against was investigated. With above tests, it found that adding crystallinity decreases strength elongation particles (0.4% graphene) increase certain extent decrease. loss modulus storage also increased addition nanoparticles. By comparing exposed with other samples, significant decrease elasticity observed. In words, make brittle.

Language: Английский

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Carbon-doped titanium dioxide (TiO2) as Li-ion battery electrode: Synthesis, characterization, and performance

Results in Chemistry, Journal Year: 2024, Volume and Issue: 7, P. 101422 - 101422

Published: Jan. 1, 2024

Development of lithium-ion batteries (Li-ion batteries) with high safety and solidity features has become a main challenge researchers when practical implementations for large-scale energy storage systems are prioritized. In this work, we introduce useful efficient strategy to manufacture long-standing high-rate carbon-doped TiO2 (C-TiO2) as an anode material. Titanium (TiO2) C-TiO2 were successfully prepared through hydrothermal method in order improve the electrical performance Li-battery. The structure thermal properties investigated by XRD, Raman TGA; whereas evaluated Glvanostatic discharge–charge measurements. density function theory (DFT) results revealed that doped carbon atoms causes considerable stress inside crystal lattice TiO2, avoid or minimize underwent relaxation then optimized. electrodes Li-battery was analyzed 100 cycles at different calcination temperatures 400 450 °C. also showed charge capacities 500 mAhg−1 mAg−1.

Language: Английский

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CdIn2Se4@chitosan heterojunction nanocomposite with ultrahigh photocatalytic activity under sunlight driven photodegradation of organic pollutants

International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 267, P. 131465 - 131465

Published: April 9, 2024

Language: Английский

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Nano bioceramics: Properties, applications, hydroxyapatite, nanohydroxyapatite and drug delivery

Case Studies in Chemical and Environmental Engineering, Journal Year: 2024, Volume and Issue: 10, P. 100869 - 100869

Published: July 29, 2024

Bone is the second organ of human body that has most transplants. The concept bone repair evolved over past five decades and known as third generation biomaterials. During integration nanotechnology with bioceramics, an emerging research field called nanobioceramics been born within Due to chemical similarity mineral content bone, are included in definition a new biomaterials whose main purpose create microenvironment improve cellular responses leading osteogenesis. Hydroxyapatite member calcium phosphate family. This substance, which bioactive biocompatible compound, considered component tissue. structural this compound it widely used tissue dental orthopedic applications. Many basic properties hydroxyapatite can be improved by changing scale its particles nanoparticles. Therefore, recent years, various methods for synthesis nanohydroxyapatite have reported. Using different characterization methods, quality synthesized nanostructures checked. In addition bone-related fields, also carrier transfer materials, including drugs, vitamins, proteins. article, modern times, advances biomedical focusing on use bioceramics treatment diseases, function vital organs, engineering brought hopes regenerative medicine. Various being investigated synthesize bioceramic materials using natural synthetic materials. There several challenges enable cost-effective material minimize rejection biological systems. One major incorporating foreign into systems their acceptance reduce humans other organisms studying immune responses. When developing ceramic mechanical one important parameters humans. evaluation criteria mechanical, existing approaches play crucial role validating bioceramics. State-of-the-art techniques

Language: Английский

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Preparation and characterization of anticorrosive and antibacterial coatable nanocomposite based on zinc phosphate modified by Hydroxy Apatite/alginate: Investigation of electrochemical impedance spectroscopy (EIS)

Case Studies in Chemical and Environmental Engineering, Journal Year: 2024, Volume and Issue: 9, P. 100694 - 100694

Published: March 18, 2024

In This study, three new surface-modified antibacterial and anticorrosive nanocomposites (zinc Phosphate- Polyvinyl Pyrrolidone, Zinc Pyrrolidone/Hydroxy Apatite Apatite/Alginate) were synthesized in low-temperature by facile efficient method. We crosslink Alg with Zn2+ Ca2+ to make it insoluble enhancing of their physical biological properties Apatite/Alginate). Nanocrystals characterized (XRD), (FT-IR), (EDX), (SEM) (TEM). the TEM image showed that core shell nanocrystal had good dispersion a particle size 8–36, 12–38 10–45 nm, respectively. Antibacterial rate Apatite/Alginate NPs reached near 100%. To analyze EIS results obtained from equivalent circuits, parameters such as Rct, CPEdl, Rf, n, CPEf, Rt extracted. Nyquist diagrams demonstrated sample better protection than Pyrrolidone sample, at all immersion time. The phase angle (-θ 11°/96 h) was greater value compared Alginate 10°/96 4.2°/96 h), indicating transition capacitive inductive behavior longer times.

Language: Английский

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Rechargeable batteries for energy storage: A review

e-Prime - Advances in Electrical Engineering Electronics and Energy, Journal Year: 2024, Volume and Issue: 8, P. 100510 - 100510

Published: March 13, 2024

Sustainability and lack of resources both outline need for energy storage tactics, materials, devices. In fact, is nowadays the most important, at same time challenging feature in under development developing countries. Renewable energies are focused as minimizing consumption, whereas maximizing energies. Geopolitical features together with wars middle-east Europe borderline criticize such important topic more more. Rechargeable batteries have widely been served developed continuously electronic devices a means storing electrical energy. Therefore, increasing capacity life has become target researchers working this field. Enlargement application performance windows possible by era nanotechnology, that new generations rechargeable enjoy from much higher efficiency respect to first-generation ones. article, after examining electrochemical preparations, their types discussed. Alkaline lead-acid also discussed on basis nanotechnology.

Language: Английский

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Recent advances in nicotine electrochemical biosensors: A review

Case Studies in Chemical and Environmental Engineering, Journal Year: 2024, Volume and Issue: 9, P. 100753 - 100753

Published: May 16, 2024

The chemical compound nicotine, specifically 3-(1-methyl-2-pyrrolidinyl) pyridine, is a notable xenobiotic under investigation in the realm of electrochemical biosensors. This article emphasizes nature this substance and its impact on human body. Different species with pharmacological, therapeutic, industrial, food-related, environmental origins can now be detected using sensors. Nicotine, an addictive tobacco products electronic cigarettes (e-cigs), recognized for increasing risk cardiovascular respiratory disorders. Careful real-time monitoring nicotine exposure critical alleviating potential health impacts not just smokers but also those exposed to second-hand third-hand smoke. Monitoring requires suitable sensing material detect selectively testing free-living conditions standard environment. A biosensor consists sensitive biological system detector appropriate transducers obtaining output signals. applications these devices include screening, detection contaminants, farming, routine medical examinations. Critical factors widespread commercialization will product's selectivity, sensitivity, stability, lower production costs. Scientists have been working developing nano high degree sensitivity selectivity recognition biomarkers immune responses cancer. An analysis various parameters, including Limit Detection (LOD) concentration within pH range (7-7.4), has conducted. objective enhance expand linear range, optimize optical electrical properties. delves into optimization sensors biosensors from perspective, highlighting positive negative effects as well metabolic pathways study categorizes evaluates latest based their generation (electron transfer between multilayers) methods (modification types or direct electrodes). strengths weaknesses each are scrutinized over past 15 years, focus solely

Language: Английский

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Cellulose nanomaterials in oil and gas industry and bio-manufacture: Current situation and future outlook

Case Studies in Chemical and Environmental Engineering, Journal Year: 2024, Volume and Issue: unknown, P. 100993 - 100993

Published: Oct. 1, 2024

Language: Английский

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