The study aims to use waste plastic PET bottles recover terephthalic acid for preparing copper-1,4-benzenedicarboxylate, which was then utilized as an adsorbent removal of methylene blue (MB) from aqueous solutions after carefully characterizing by XRD, FTIR, TGA, SEM, and EDX. optimum conditions were established pH = 6, 25°C, dose 1 g L−1, contact time 20 min, agitation speed 150 rpm. adsorption process spontaneous, exothermic, fitting well Langmuir isotherm model with the maximum capacity...

Magnetic activated carbon/chitosan composite (MACCS) beads from spent coffee grounds and shrimp shells were synthesized using green tea extract as a crosslinker. The adsorbent was then applied for removal of Ni(II) ions aqueous solution after carefully characterizing it by various techniques (XRD, FTIR, FE-SEM, EDX, VSM BET). adsorption kinetics, isotherms, thermodynamics, the effects key factors such pH value, initial concentration, contact time, dose temperature investigated in detail. A...

In this study, biogenic silver nanoparticles (AgNPs) and gold (AuNPs) were synthesized by a green approach using an aqueous extract from Codonopsis pilosula (CP) roots as reducing stabilizing agent. The formation of CP-AgNPs CP-AuNPs was confirmed optimized UV-Vis spectroscopy. obtained under optimum conditions metal ion concentration, reaction temperature, time characterized high-resolution transition electron microscopy (HR-TEM), selected area diffraction (SAED) analysis, field-emission...

In the present work, a novel composite consisting of magnetite, activated carbon from spent coffee grounds and natural clay (MACCC) was prepared by one-pot synthesis method via simultaneous activation magnetization processes. Various techniques (XRD, FTIR, SEM, TEM, EDX, BET) were utilized to characterize synthesized before utilizing it as an adsorbent for removal Cu(II), Ni(II) Pb(II) ions aqueous solutions. Conditions heavy metals thoroughly optimized 25 °C, pH 5.5, dosage 2 g L−1, contact...

<title>Abstract</title> This paper reports a comparative study on the influence of pristine and oxidized multiwalled carbon nanotubes ferroelectricity dielectric dispersion classical ferroelectric Rochelle salt in range 10^{− 2} − 10⁷ Hz with an amplitude electric field strength 2 V/cm. For study, phase transition, polarization switching, frequency dependencies permittivity electrical conductivity two composites based combined each fillers were considered at different...

(1) Autologous chondrocyte implantation (ACI) is a prominent method for treating cartilage damage, but periosteal patches can cause leakage. This study evaluates the potential of decellularized membrane derived from cell-produced extracellular matrix 1-day-old porcine (pcECM-DM) to act as substitute patches. (2) The interaction between young rabbit cells and pcECM-DM was assessed through cytotoxicity, differentiation, cell viability, migration, adhesive ability. Rabbit cells, cultivated...

In this work, magnetic graphene oxide nanocomposites were synthesized by co-precipitation method and used as an adsorbent for removal of arsenic (V) ions from water. The structure morphology studied X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, Brunauer–Emmett–Teller specific surface area, vibrating sample magnetometry. microscopy results presented that the Fe 3 O 4 nanoparticles in size range 10–25 nm decorated on nanosheets. adsorption...

Five fluid tilted mesophases are observed in a series of achiral banana-shaped compounds. The terminal chain length is the pertinent molecular parameter which induces polymorphism change. All phases, refer to lamellar structure without in-plane order layers. observation monolayer, bilayer, ribbon phase, and undulated structures recalls richness frustrated polar calamitic liquid crystals. Among mesophases, we highlight two: Sm-C G2 phase corresponding bilayer made Sm-CG layers, its...

C/Ce-codoped ZnO nanoparticles immobilized onto multi-walled carbon nanotubes (C/Ce-ZnO@MWCNT) were successfully fabricated via the hydrothermal method for degradation of methylene blue (MB) under visible light irradiation. The prepared C/Ce-ZnO@MWCNT samples characterized by XRD, XPS, FTIR, FE-SEM, EDX, BET, and diffuse reflectance spectroscopy. obtained results indicated that photocatalytic activity all MWCNTs-containing was higher than those bare nanoparticles. Besides, composite with 50...

Dielectric relaxation in ferroelectric composite nanocrystalline cellulose – triglycine sulfate the frequency range from 103 to 106 Hz a weak measuring field (1 V·cm−1) room temperature phase transition of these composites (+54°C) has been investigated. Two series nanocomposites were used: first one with perpendicular directions nanochannels respect sample surface and second parallel. The typical for single-crystal maximum imaginary part dielectric permittivity at frequencies (105 Hz) case...

Influence of the humidity on dielectric properties composites nanocrystalline cellulose – triglycine sulfate in weak measuring field (1 V·cm−1) was investigated from room temperature to +120°C frequency range 10−3 103 Hz. A comparative analysis experimental results before and after heat treatment samples made. It shown that an additional peak at about +20°C dependence constant a low-frequency maximum 1.6 mHz loss are observed. They conditioned by evaporation water sample surface beginning...

In this study, magnetic iron oxide/graphene oxide (Fe3O4/GO) nanocomposites were developed for removal of cadmium ions (Cd2+) from water, which could be effectively separated the solution owing to its superparamagnetic property. The Fe3O4/GO fabricated by co-precipitation method with different precursor ratios 8:1, 4:1, 2:1, and 1:1. It was found that suitable ratio Cd2+ adsorption 4:1 (FG2). effects contact time, pH, metal initial concentration on properties FG2 in water investigated. data...

A novel magnetic composite prepared from Fe3O4, poly(vinyl alcohol) and alkaline pretreated spent coffee grounds (Fe3O4/PVA/APSCGs) was utilized for the first time as an adsorbent adsorption of Pb(II) ions after carefully characterizing it by various techniques (XRD, FTIR, SEM, EDX). The obtained results indicated that spontaneous, endothermic, fitting well with both Langmuir Freundlich models, more suitable to be described second-order kinetic model. maximum capacity Fe3O4/PVA/APSCGs at...

This study is devoted to synthesis of nanosized zincated hydroxyapatite (Zn-HA) and its utilization as a heterogeneous photo-Fenton-like catalyst for degradation methylene blue (MB) in aqueous solution. The prepared was characterized by various techniques such X-ray diffraction, scanning electron microscopy, transmission energy-dispersive X-ray, Fourier transform infrared spectroscopy. catalytic activity Zn-HA towards MB the effects experimental factors pH, zinc substitution degrees, initial...

A metal-organic framework of iron-doped copper 1,4-benzenedicarboxylate was synthesized and, for the first time, utilized as a heterogeneous photo-Fenton catalyst degradation methylene blue dye in aqueous solution under visible light irradiation. The materials were characterized by scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction and energy-dispersive spectroscopy. influence factors, kinetics, stability catalysts investigated detail. Iron-doped showed...

Dielectric dispersion for a composite based on nanocrystalline cellulose with triglycine sulfate in the frequency range from 1 mHz to kHz at different temperatures room temperature phase transition of (∼ +54°C) weak measuring field (1 V·cm−1) was investigated. The obtained results showed presence two relaxation regions: characteristic bulk linear dielectric (10 Hz – kHz) associated irreversible motion domain walls and significant region lower frequencies 10 related Maxwell-Wagner-Sillars...

The present work is devoted to the synthesis of a novel photocatalyst TiO2/Ag3PO4/bentonite composite and its utilization for degradation methylene blue (MB) in aqueous solution under visible light irradiation. synthesized catalyst was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, field emission scanning electron microscopy, Brunauer-Emmett-Teller method energy-dispersive techniques. Degradation conditions were optimized as pH 7, loading 0.1 g, initial MB...

An eco-friendly ferroelectric nanocomposite from cellulose nanoparticles (CNP) and Rochelle salt (RS) at different composition mass ratios was synthesized for clarifying phase transition anomalies after carefully characterizing by scanning electron microscope (SEM), X-ray diffraction (XRD) Fourier-transform infrared spectroscopy (FTIR) techniques. The dielectric experiments were conducted in a temperature range 5°C to 60°C under weak electric field (2 V/cm) 1 kHz. obtained results indicated...

The present work is devoted to comparative study on electrophysical properties of non-irradiated and gamma-irradiated ferroelectric composites synthesized from triglycine sulfate cellulose nanoparticles. investigation phase transition indicated that depending composition weight ratio, the temperature samples increased by 3 a few tens celcius degrees higher than those for single crystal TGS (+49°C), while characteristic relaxation frequencies were lower. Besides, two areas linear dispersion...