Adsorption of UO2 2+ by AlBaNi-layered double hydroxide nano-particles: kinetic, isothermal, and thermodynamic studies

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Olivea Abd Al-Azim Elhefnawy ◽  
Amira Abd ElFattah Elabd
Keyword(s):  
Electron Microscope ◽  
Nano Particles ◽  
Precipitation Method ◽  
Isotherm Models ◽  
X Ray ◽  
Atomic Force ◽  
Transmission Electron ◽  
Pseudo Second Order ◽  
Co Precipitation ◽  
Double Hydroxide

Abstract AlBaNi-LDH nanoparticles have been synthesized by the co-precipitation method. A series of characterization analyses (Scanning Electron Microscope, Energy Dispersive X-ray, Transmission Electron Microscope, X-ray Diffraction, Atomic Force Microscope, and Infrared spectroscopy) proved that the surface structure of AlBaNi-LDH nano-particles was the key mechanism for UO2 2+ adsorption. The synthesized product showed good performance in UO2 2+ adsorption efficiency in neutral pH with a maximal adsorption capacity of 137 mg/g. The results demonstrated the adsorption process fitted well with pseudo-second-order and Langmuir isotherm models. Also, the effects of coexisting ions and different eluents are briefly described. These results confirm that AlBaNi-LDH is an effective material for the adsorption of UO2 2+ from an aqueous solution with reusable availability.

Template Induced Synthesis of Nano-Hydroxyapatite by Co-Precipitation Method

2011 ◽  
Vol 311-313 ◽  
pp. 1713-1716 ◽  
Author(s):  
Yan Rong Sun ◽  
Tao Fan ◽  
Chang An Wang ◽  
Li Guo Ma ◽  
Feng Liu
Keyword(s):  
Electron Microscope ◽  
Chondroitin Sulfate ◽  
Aspartic Acid ◽  
Transmission Electron Microscope ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure And Morphology ◽  
Transmission Electron ◽  
Co Precipitation

Nano-hydroxyapatite with different morphology was synthesized by the co-precipitation method coupled with biomineralization using Ca(NO3)2•4H2O and (NH4)2HPO4 as reagents, adding chondroitin sulfate, agarose and aspartic acid as template. The structure and morphology of the prepared powders were characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM).

Loading of siRNA on Magnetic PLL-Fe2O3@SiO2 Nanocomposites and their Transfection In Vitro

2014 ◽  
Vol 1053 ◽  
pp. 444-449
Author(s):  
Xue Wen Cui ◽  
Gang Cheng ◽  
Rui Jiang Liu ◽  
Li Wei Wang ◽  
Yan Shuai Wang
Keyword(s):  
Electron Microscope ◽  
Precipitation Method ◽  
Blue Staining ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sd Rat ◽  
Gene Carriers ◽  
Transmission Electron ◽  
Co Precipitation

The magnetic Fe2O3 nanoparticles were prepared by co-precipitation method with FeCl3 and NaOH as starting reagents. The surface of Fe2O3 nanoparticles was modified with tetraethyl orthosilicate. Fe2O3@SiO2 nanocomposites were calcined at 600 °C. The nanocomposites were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX). The PLL-Fe2O3@SiO2 (SMNP) was prepared by modifying with poly-L-lysine on the surface. The SMNP combined with plasmid siRNA by static electrical charges as one of gene carriers was transfected into SD rat neurons. The results of fluorescence microscope and Prussian blue staining show that SMNP can effectively enter cells. Therefore, SMNP are one kind of novel and effective gene carriers, it can transfect the plasmid which carries the siRNA into SD rats neurons in vitro.

Preparation and characterization of iron oxide nanoparticles coated with chitosan for removal of Cd(II) and Cr(VI) from aqueous solution

2014 ◽  
Vol 70 (6) ◽  
pp. 1004-1010 ◽  
Author(s):  
Th. I. Shalaby ◽  
N. M. Fikrt ◽  
M. M. Mohamed ◽  
M. F. El Kady
Keyword(s):  
Electron Microscope ◽  
Magnetic Nanoparticles ◽  
Magnetic Nanomaterials ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Toxic Heavy Metals ◽  
Transmission Electron ◽  
Magnetite Fe3o4 ◽  
Co Precipitation

This study investigated the applicability of magnetite Fe3O4 nanoparticles coated with chitosan (CMNs) for the removal of some toxic heavy metals from simulated wastewater. Magnetic nanomaterials were synthesized using the co-precipitation method and characterized by transmission electron microscope, scanning electron microscope, X-ray diffraction, and Fourier transformer infrared spectroscopy. The magnetic properties of the prepared magnetic nanoparticles were determined by a vibrating-sample magnetometer. Batch experiments were carried out to determine the adsorption kinetics of Cr(VI) and Cd(II) by magnetic nanoparticles. It is noteworthy that CMNs show a highly efficient adsorption capacity for low concentration Cr(VI) and Cd(II) ions solution, which can reach 98% within 10 min.

Adsorptive removal of PPCPs by biomorphic HAP templated from cotton

2016 ◽  
Vol 74 (1) ◽  
pp. 276-286 ◽  
Author(s):  
Bin Huang ◽  
Dan Xiong ◽  
Tingting Zhao ◽  
Huan He ◽  
Xuejun Pan
Keyword(s):  
Adsorption Mechanism ◽  
Adsorption Process ◽  
Freundlich Isotherm ◽  
Kinetic Studies ◽  
Precipitation Method ◽  
Adsorptive Removal ◽  
Transmission Electron ◽  
Initial Ph ◽  
Pseudo Second Order ◽  
Co Precipitation

Biomorphic nano-hydroxyapatite (HAP) was fabricated by a co-precipitation method using cotton as bio-templates and employed in adsorptive removal of ofloxacin (OFL) and triclosan (TCS) that are two representative pharmaceuticals and personal care products (PPCPs). The surface area and porosity, crystal phase, functional group, morphology and micro-structure of the synthesized HAP were characterized by Brunauer–Emmett–Teller isotherm, X-ray powder diffraction, Fourier transform infrared spectroscopy, scanning electron macroscopic and transmission electron microscopy. The effects of initial pH, ionic strength, initial concentration, contact time and temperature on the removal of PPCPs were studied in a batch experiment. The adsorption of OFL and TCS was rapid and almost accomplished within 50 min. Kinetic studies indicated that the adsorption process of OFL and TCS followed the pseudo-first-order and pseudo-second-order models, respectively. The Freundlich isotherm described the OFL adsorption process well but the adsorption of TCS fitted the Langmuir isotherm better. Thermodynamics and isotherm parameters suggested that both OFL and TCS adsorption were feasible and spontaneous. Hydrogen bond and Lewis acid–base reaction may be the dominating adsorption mechanism of OFL and TCS, respectively. Compared to other adsorbents, biomorphic HAP is environmentally friendly and has the advantages of high adsorption capacity, exhibiting potential application for PPCPs removal.

scholarly journals Synthesis and Characterization of a Core-shell Material Using YBa2Cu3O7-d and Cobalt Ferrite Nanoparticles

2019 ◽  
Vol 69 (12) ◽  
pp. 3345-3348
Author(s):  
Maria Colie ◽  
Dan Eduard Mihaiescu ◽  
Daniela Istrati ◽  
Adrian Vasile Surdu ◽  
Bogdan Vasile ◽  
...  
Keyword(s):  
Cobalt Ferrite ◽  
Nanostructured Material ◽  
Ferrite Nanoparticles ◽  
Precipitation Method ◽  
Core Shell ◽  
Shell Material ◽  
X Ray ◽  
Cobalt Ferrite Nanoparticles ◽  
Transmission Electron ◽  
Co Precipitation

In this paper we describe the synthesis of a core-shell material using yttrium superconducting ceramic material (YBCO) and cobalt ferrite nanoparticles in order to obtain a nanostructured material with magnetic properties. The advantages of such material aim the selective deposition of nanofilms oriented in magnetic fields. To obtain this core-shell material, the solutions of the nitrates were first obtained by dissolving the salts in demineralised water. The suspension with cobalt ferrite nanoparticles was obtained by co-precipitation method. To obtain YBa2Cu3O7-�- coated magnetic nanoparticles by autocombustion reaction the solutions of nitrates and citric acid were used. The ratio of the metal ions: Y:Ba:Cu was 1:2:3, and between the oxidant and the reducing agent was used a citrate / nitrate mass ratio equal with 0.7. The final material was analyzed by X-ray diffraction (XRD), electronic scanning microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), high resolution transmission electron microscopy (HRTEM) and vibrating sample magnetometer (VSM).

scholarly journals Electrochemical Performance of Lanthanum Cerium Ferrite Nanoparticles for Supercapacitor Applications

2021 ◽  
Author(s):  
Waseem Raza ◽  
Ghulam Nabi ◽  
Asim Shahzad ◽  
Nafisa Malik ◽  
Nadeem Raza
Keyword(s):  
Electron Microscopy ◽  
Electrode System ◽  
Ferrite Nanoparticles ◽  
Precipitation Method ◽  
Super Capacitor ◽  
X Ray ◽  
Transmission Electron ◽  
Co Precipitation ◽  
First Time ◽  
Supercapacitor Applications

Abstract Lanthanum cerium ferrite nanoparticles has been synthesized for the first time via hydrothermal and co-precipitation method. The structural and morphological study of the nanoparticles have been examined by using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive x-ray spectroscopy (EDX). The electrochemical study of J1 and J2 electrodes have been examined using three electrode system in 6 M KOH electrolyte using cyclic voltammetry (CV), galvanostatic charging-discharging (GCD) and electrochemical impendence spectroscopy (EIS). The highest specific capacitance of 1195 F/g has been obtained at a scan rate of 10 mV/s from hydrothermal synthesis nanomaterial electrode (J2) and long cycling life 92.3% retention after 2000th cycles. Furthermore, the energy density and power density of the J2 electrode at a current density of 5 A/g was 59 Wh/kg and 9234 W/kg respectively. Hence, the fabricated J2 electrode is a favorable candidate for super-capacitor applications.

scholarly journals Ciprofloxacin Based on Carrier Double Layered Hydroxide Nano-particles of Fe+3/Fe+2, Fe+3/Ni+2, Al+3/Fe+2, and Al+3/Ni+2 Ions

2020 ◽  
Vol 10 (01) ◽  
pp. 119-126
Author(s):  
Noor M. Mohammed ◽  
Farah AH. Kadhim ◽  
Aseel A. Hammood ◽  
Ashour H. Dawood
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Nano Particles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Atomic Force ◽  
Ft Ir ◽  
Double Layered Hydroxide ◽  
Scanning Electron ◽  
Ft Ir Spectroscopy

The double-layered hydroxide nano-particles compounds with ciprofloxacin drug were carried out by preparation of the double layered hydroxide (DLH) of M+3/M+2 ions for selective ions. The ciprofloxacin drug was inserted between them. The resulted compounds were characterized by X-Ray diffraction (XRD), scanning electron microscope (SEM), atomic force microscope (AFM), and Fourier Transform Infrared (FT-IR) spectroscopy; the antibacterial studied done by using the gram (+) and gram (-) pigments.

Synthesis and Characterization of Structure of Fe3O4@Graphene Oxide Nanocomposites

2016 ◽  
Vol 25 (6) ◽  
pp. 096369351602500 ◽  
Author(s):  
Ruimin Fu ◽  
Mingfu Zhu
Keyword(s):  
Graphene Oxide ◽  
Drug Carrier ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Ft Ir ◽  
Co Precipitation ◽  
Ft Ir Spectroscopy

Nowadays, the hummers method for preparation of graphene oxide (GO) was improved. The grapheme oxide @ Fe3O4 magnetic nanocomposites were synthesized by co-precipitation method. After analysing the morphology and structure of obtained nanocomposites by X-ray diffraction (XRD), transmission electron microscope (TEM) and Fourier transform infrared (FT-IR) spectroscopy, the result was shown as follows. The particle size of Fe3O4 in nanocomposites is 30 nm. Many functional groups are found in grapheme oxide, and such groups could be used to bind with the drug. In the test for magnetic properties, the nanocomposites gathered rapidly in the vicinity of the permanent magnet. The nanocomposites, with high superparamagnetism, can be used in the following applications: drug targeting transports, drug carrier, and diagnosis assistant system.

Synthesis and Luminescence Properties of Yb3+/Ho3+ Co-Doped Lu2O3 Nanocrystalline Powders

2007 ◽  
Vol 280-283 ◽  
pp. 521-524
Author(s):  
Li Qiong An ◽  
Jian Zhang ◽  
Min Liu ◽  
Sheng Wu Wang
Keyword(s):  
Electron Microscopy ◽  
Upconversion Luminescence ◽  
Nanocrystalline Powders ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Excitation Spectra ◽  
X Ray ◽  
Transmission Electron ◽  
Co Precipitation ◽  
Co Doped

Yb3+ and Ho3+ co-doped Lu2O3 nanocrystalline powders were synthesized by a reversestrike co-precipitation method. The as-prepared powders were examined by the X-ray diffraction and transmission electron microscopy. The phase composition of the powders was cubic and the particle size was in the range of 30~50 nm. Emission and excitation spectra of the powders were measured by a spectrofluorometer and the possible upconversion luminescence mechanism was also discussed.

Immobilization of Salicylic Acid on Ni-Zn Layered Hydroxide Salts

2020 ◽  
Vol 840 ◽  
pp. 566-572
Author(s):  
Muhammad Robith Tahta Amnillah ◽  
Suyanta Suyanta ◽  
Sri Juari Santosa
Keyword(s):  
Salicylic Acid ◽  
Freundlich Isotherm ◽  
Point Of Zero Charge ◽  
Precipitation Method ◽  
Isotherm Models ◽  
Basal Spacing ◽  
X Ray ◽  
Dependent Property ◽  
Ph Range ◽  
Co Precipitation

Ni-Zn Layered hydroxide salt (Ni-Zn LHS) has been synthesized from equimolar Ni(NO3)2 and Zn(NO3)2 by co-precipitation method using NaOH. The formation of layered assembly is confirmed in X-ray diffractogram, i.e. by the appearance of peaks at 2θ: 9.60°, 19.40°, 33.48°, and 59.76° which corresponds to diffraction plane (001), (003), (020), and (040), respectively. The synthesized Ni-Zn LHSs possessed the point of zero charge (pHpzc) at pH 8 and nitrate as the interlamellar ion. The incorporation of salicylic acid into LHS can extend the property of LHS as a reductive adsorbent in the application of metal recovery. The immobilization of salicylic acid on the Ni-Zn-LHS was successfully done and indicated the strong pH-dependent property. The immobilization of salicylic acid on Ni-Zn LHSs was optimum at pH 7 and followed better the Langmuir than Freundlich isotherm models with immobilization capacity 64.93 mg/g. After the immobilization of salicylic acid, the basal spacing of Ni-Zn LHSs did not enlarge indicating that the immobilized salicylic acid was on the outer layer without entering the interlayer and this immobilized salicylic acid was stable at medium pH range 3 to 9.

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