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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An overview of nanoparticles in drug delivery: Properties and applications

South African Journal of Chemical Engineering, Journal Year: 2023, Volume and Issue: 46, P. 233 - 270

Published: Aug. 22, 2023

Today, in diverse medical and clinical fields, including cancer treatment, nanoscience has evolved evolved. Cancer its forms, on the other hand, have been rumored inclusive, many individuals suffer from this fatal lethal condition. Actually, even with medicinal effect, current therapeutic approaches, chemotherapy, radiotherapy, etc., create symptoms that are inconvenient for patients. Scientists scholars also working to establish and, strengthen options methods of therapy deal dangerous illness. Nanoscience nanotechnology popular today, their different areas, nanoparticles, commonly used a number applications, especially drug delivery diagnostic products, cases imaging. Release mechanisms focused profound effect release drugs. Biomaterials bio-engineering developments leading novel approaches nanoparticles could offer new way patients improve. In method, Nano-technology had great selection cells, targeted drug, overcoming traditional chemotherapy limitations. This article discusses tumor tissue, method is more effective than methods, solved problem cell resistance provided field treatment cancer.

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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Nanowires Properties and Applications: A Review Study

South African Journal of Chemical Engineering, Journal Year: 2023, Volume and Issue: 46, P. 286 - 311

Published: Aug. 22, 2023

One-dimensional nanostructures are generally cited as nanowires, nanofibers, nanotubes, and so on. The foremost prominent feature of these materials is their electrical conductivity, which, unlike classical physics, doesn't increase resistance because the diameter decreases. Numerous properties like optical, magnetic, biological, environmental sensory have created many applications for them altogether industries. nanowires (NWs) propose potential impact on electronics, computing, memory, data storage, communications, manufacturing, health, medicine, national security, other economic sectors well. NWs offer excellent surface-to-volume ratio (interface phenomena), low defect density, high optical output, controllable n-type making more appropriate sensitive sensing applications. with ultra-sensitive real-time detection capabilities lend in nano biosensors, chemical sensors, gas electrochemical sensors. been used improving absorption well collection efficacy photovoltaic devices. having small size, weight, cost mass production, also compatible commercial planar processes large-scale circuitry. In paper, authors focusing to summarize recent advances various fields such research, education, entertainment, power generation.

Language: Английский

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Adsorption of heavy metal ions use chitosan/graphene nanocomposites: A review study

Results in Chemistry, Journal Year: 2024, Volume and Issue: 7, P. 101332 - 101332

Published: Jan. 1, 2024

The emission of heavy metals in the environment has caused many problems world due to industrialization society and expansion urbanization. Environmental pollution, including greenhouse gases water-soluble toxic pollutants, is a major concern around world. One most important issues protecting health humans, animals plants cleanliness water. Water substance vital for all living things on planet. can be treated several ways, such as desalination, purification, osmosis, disinfection, deposition contaminants. Among these methods, adsorption method advantages over other methods. surface phenomenon during which contaminants are adsorbed adsorbent with physical forces depends factors temperature, pH, concentration contaminants, time phase contact particle size temperature nature pollutants adsorption. Chitosan received widespread attention an because its low cost great potentials. abundant hydroxyl amino groups that bind metal ions. However, it defects sensitivity thermal stability, mechanical strength, limit application chitosan wastewater treatment. functional modified improve performance via crosslinking graft modification. porosity specific area powder form not ideal, therefore, modification been attempted generate nanoparticles hydrogel. also integrated materials (e.g. graphene, zeolite) resulting composite improved performance. This review mainly focuses reports about derivatives remove different metals. preparation strategy, mechanism, affecting adsorbents each type discussed detail. Recent organic (dyes phenol) removal by briefly discussed.

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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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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A study in analytical chemistry of adsorption of heavy metal ions using chitosan/graphene nanocomposites

Case Studies in Chemical and Environmental Engineering, Journal Year: 2023, Volume and Issue: 8, P. 100426 - 100426

Published: July 27, 2023

In this work, chitosan/graphene nanocomposite granules with weight percentages of 0.5%, 1%, 2% and 5% were prepared using a solution method. At first, graphene was oxidized sulfuric nitric acid then triethylenetetramine grafted on surface. Functionalized characterized by Fourier-transform infrared spectroscopy (FT-IR), Therapeutic Goods Administration (TGA), X-ray energy diffraction (EDX) Scanning electron microscope (SEM). Results showed functionalization successfully accomplished. The thermogravimetric analysis curves the pristine, functionalized graphenes are stable up to 400, 250, 300, respectively. pristine more than graphenes. observed stabilized temperature is known be strongly influenced step functionalization. morphology monitored SEM images that porosity reduced due presence nano samples have higher potential for ion metals adsorption neat chitosan. cadmium increased around 20% in comparison Atomic spectrometry optimal rate occurs 50 ppm pH = 7 contact time 2 hours an adsorbent 25 mg.

Language: Английский

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A review of nanoparticle synthesis methods, classifications, applications, and characterization

Environmental Nanotechnology Monitoring & Management, Journal Year: 2023, Volume and Issue: 20, P. 100900 - 100900

Published: Nov. 24, 2023

Language: Английский

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A graphene oxide/polyaniline nanocomposite biosensor: synthesis, characterization, and electrochemical detection of bilirubin

RSC Advances, Journal Year: 2023, Volume and Issue: 13(51), P. 36280 - 36292

Published: Jan. 1, 2023

The level of free bilirubin is a considerable index for the characterization jaundice-related diseases. Herein, biosensor was fabricated via immobilization oxidase (BOx) on graphene oxide (GO) and polyaniline (PANI) that were electrochemically co-precipitated indium tin (ITO) conductive glass. structural enzyme electrode characterized by FTIR, XRD, Raman spectroscopy, while spectral thermal properties investigated UV-vis thermogravimetric analysis (TGA). Owing to activity BOx/GO@PANI/ITO biosensor, it could detect with good selectivity sensitivity in low response time. electrochemical studied using impedance spectroscopy (EIS) cyclic voltammetry (CV). At polarization potential 0.2 V vs. Ag/AgCl, sensor illustrated only 2 s at 30 °C pH 7.5. LOD LOQ calculated found be 0.15 nM 2.8 nM, respectively. signal showed linear concentration range 0.01-250 μM. 5 °C, demonstrated half-time 120 days, through which utilized 100 times this temperature conditions. By common colorimetric method, data levels serum determination coefficient (R2) 0.97.

Language: Английский

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