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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Synthesis and Modification of Nanoparticles with Ionic Liquids: a Review

BioNanoScience, Journal Year: 2023, Volume and Issue: 13(2), P. 760 - 783

Published: March 2, 2023

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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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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A review of gas sensors based on carbon nanomaterial

Carbon letters, Journal Year: 2021, Volume and Issue: 32(2), P. 339 - 364

Published: Sept. 20, 2021

Language: Английский

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Recent Progress on Nanomaterial-Based Membranes for Water Treatment

Membranes, Journal Year: 2021, Volume and Issue: 11(12), P. 995 - 995

Published: Dec. 20, 2021

Nanomaterials have emerged as the new future generation materials for high-performance water treatment membranes with potential solving worldwide pollution issue. The incorporation of nanomaterials in increases permeability, mechanical strength, separation efficiency, and reduces fouling membrane. Thus, pave a pathway ultra-fast extremely selective purification membranes. Membrane enhancements after inclusion many nanomaterials, including nanoparticles (NPs), two-dimensional (2-D) layer materials, nanofibers, nanosheets, other nanocomposite structural are discussed this review. Furthermore, applications these applications, that vast number, highlighted. goal is to demonstrate significance membrane industry applications. It was found nanotechnology offer great advancement sustainable wastewater treatment.

Language: Английский

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A Review of High-Energy Density Lithium-Air Battery Technology: Investigating the Effect of Oxides and Nanocatalysts

Journal of Chemistry, Journal Year: 2022, Volume and Issue: 2022, P. 1 - 32

Published: March 12, 2022

In vehicles that require a lot of electricity, such as electric vehicles, it is necessary to use high-energy batteries. Among the developed batteries, lithium-ion battery has shown better performance. This an energy density 10 equal and uses air oxygen active material cathode anode like made lithium metal. The used in these batteries must have special properties strong catalytic activity high conductivity, nanotechnology greatly helped improve materials lithium-air importance proper catalyst distribution relationship between oxide product indirect effect ORR on OER reaction not present fuel cell. maximum capacity theory using graphene under optimal electron conduction conditions experimental obtained for by optimizing structure geometry, examples structural engineering carbon fiber nanotubes fabrication with ability perform properly while providing space placement, are examined. article describes mechanism this battery, its components challenges application solve also discussed.

Language: Английский

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Oxygen production routes assessment for oxy-fuel combustion

Energy, Journal Year: 2022, Volume and Issue: 254, P. 124303 - 124303

Published: May 21, 2022

Language: Английский

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End-to-end value chain analysis of isolated renewable energy using hydrogen and ammonia energy carrier

Energy Conversion and Management, Journal Year: 2022, Volume and Issue: 254, P. 115247 - 115247

Published: Jan. 22, 2022

Language: Английский

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