Zinc-Containing Coordination Polymer as a Suitable Precursor for Solid State Synthesis of ZnO

2019 ◽  
Vol 72 (9) ◽  
pp. 693
Author(s):  
Maryam Mohammadikish ◽  
Zohreh Zafari ◽  
Susan Torabi
Keyword(s):  
Coordination Polymer ◽  
Zno Nanoparticles ◽  
Inductively Coupled Plasma ◽  
Organic Ligand ◽  
Photogenerated Electron ◽  
Optical Emission ◽  
Blue Shift ◽  
Precipitation Method ◽  
Inductively Coupled ◽  
Electron Microscopies

Uniform zinc-containing infinite coordination polymer (ICP) nanoparticles were achieved via a straightforward and rapid precipitation method in 5min, from a bi-thioglycolate functionalized salpn ligand (salpn=N,N′-bis(salicylidene)-1,3-propanediamine) as linker and zinc acetate. Characterization of the resulting product was performed by CHN elemental analysis, inductively coupled plasma–optical emission spectroscopy, FT-IR spectroscopy, thermogravimetric analysis, electron microscopies (FE-SEM and HR-TEM), and photoluminescence spectroscopy. Elemental analyses verified the proposed structure for the ICP with a 1:2 ratio of the salpn type ligand and Zn2+ ion. FE-SEM, TEM, and AFM analyses unveiled the existence of nanoparticles with diameters of ~30nm. PL spectroscopy showed a blue shift in emission peak of the ICP with regards to the organic ligand. The obtained ICP was utilized as a precursor to synthesize ZnO nanoparticles with wurtzite structure. An increase in bandgap of the prepared ZnO nanoparticles was observed in comparison with bulk ZnO as a result of quantum confinement of photogenerated electron–hole pairs. This method can be exploited for the synthesis of other coordination polymer micro/nanostructures.

scholarly journals Thermal Behavior of Mg-Doped Calcium-Deficient Apatite and Stabilization of β Tricalcium Phosphate

2020 ◽  
Vol 10 (6) ◽  
pp. 6837-6845
Keyword(s):  
Tricalcium Phosphate ◽  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Inductively Coupled ◽  
Β Phase ◽  
Beta Tricalcium Phosphate ◽  
Lower Temperature ◽  
Mg Doped

β-tricalcium phosphate (β-TCP) is a bioceramic with unique osteoinductive and osteoconductive properties. It can be obtained by calcining calcium-deficient apatites (CDHA) at 750°C and above. The reduction of calcining temperature or the stabilization of the β phase, by doping, is therefore of particular interest. This paper investigates the preparation of CDHA with a theoretical 0.05 Mg/(Ca + Mg) ratio and (Ca+Mg)/P = 1.55 via precipitation method, and the resultant powder is calcined at a different temperature ranging from 80 to 715°C. The as-synthesized undoped powder was used as the reference in this study. The effect of calcination temperature and composition were investigated by the aid of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), inductively coupled plasma optical emission spectroscopy (ICP-OES) and scanning electron microscopy (SEM). The study indicated that the powder was pure Mg-doped beta-tricalcium phosphate. The incorporation of Mg within the calcium phosphate lattice promoted the formation and stabilization of the β -TCP phase at a lower temperature.

Recovery of Nickel from Waste Lithium Ion Secondary Battery and Fabrication of Nickel Nanopowder

2017 ◽  
Vol 733 ◽  
pp. 22-26 ◽  
Author(s):  
Sung Ok Hwang ◽  
Byung Man Chae ◽  
Deuk Hyeon Kim ◽  
Ki Sang Park ◽  
A Ra Go ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Nickel Sulfate ◽  
Lithium Ion ◽  
Optical Emission ◽  
Sulfate Solution ◽  
Precipitation Method ◽  
Inductively Coupled ◽  
Transmission Electron ◽  
Solvent Extraction Method ◽  
Nickel Nanopowder

A study on the refining of nickel sulfate solution from sulfuric acid leached solution of spent lithium ion battery and fabrication of nickel nanopowders from the nickel sulfate solution was investigated. the nickel sulfate solution with high purity (>99.9%) was refined by precipitation method and solvent extraction method. the nickel nanopowders were synthesized by liquid phase reduction method with hydrazine and sodium hydroxide. the purity of nickel sulfate solution and nickel nanopowders were measured by EDTA(ethylenediaminetetraacetic) titration method with ICP-OES(inductively coupled plasma optical emission spectrometer). morphology, particle size and crystal structure of the nickel nanopowder was observed using transmission electron microscopy and x-ray diffraction spectroscopy.

scholarly journals XRD and FTIR Analysis of Magnesium Substituted Tricalcium Calcium Phosphate Using a Wet Precipitation Method

2020 ◽  
Vol 11 (1) ◽  
pp. 8034-8042
Keyword(s):  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Lattice Parameter ◽  
Precipitation Method ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Inductively Coupled ◽  
Tcp Phase ◽  
Mg Doped

The incorporation of magnesium (Mg) in tricalcium phosphate (TCP) was prepared through a precipitation method followed by calcination at 850 °C in air. Calcium hydroxide, (Ca(OH)2), phosphoric acid, (H3PO4), and magnesium chloride (MgCl2.6H2O) with a Ca/P ratio of 1.5, were mixed as the precursor materials. The concentration of added Mg was varied with respect to calcium (Ca) precursor molarity as such Mg/(Ca +Mg) molar ratio was 0.05, 0.10, and 0.15, while the (Ca+Mg)/P ratio was maintained at 1.50 throughout the experiment. The influence of Mg-doped TCP on phase composition, chemical structure, and a functional group at different weight percentages were accomplished through X-ray diffraction (XRD), inductively coupled plasma optical emission spectroscopy (ICP-OES) and Fourier Transform Infrared Spectroscopy (FTIR) analyses. Based in the results of this research, the presence of magnesium led to the formation of Mg-doped calcium-deficient apatite (MgCDA) at 80°C and Mg-doped β-TCP at 850°C; the incorporation of Mg into the TCP phase causing an expansion of the lattice and increase in the lattice parameter. This result could be considered rather unusual.

scholarly journals Direct Synthesis of Highly Dispersible PACMA-Capped TiO2 Nanoparticles and Its Adsorption Properties towards Pb(II)

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Marta Sanchez-Sala ◽  
Concepción Domingo ◽  
José A. Ayllón
Keyword(s):  
Inductively Coupled Plasma ◽  
Colloidal Suspension ◽  
Direct Synthesis ◽  
Optical Emission ◽  
Powdered Material ◽  
Organic Polymer ◽  
Emission Spectrometry ◽  
Characterization Methods ◽  
Inductively Coupled ◽  
Electron Microscopies

A simple low-temperature one-step synthetic method of a hybrid material involving TiO2 nanoparticles modified by an organic polymer is here reported. TiO2 nanoparticles were grown by hydrolysis of hexafluorotitanate using boric acid as a fluoride scavenger. TiO2 synthesis was performed in the presence of poly(acrylic acid-co-maleic acid) (PACMA). This procedure yields a crystalline TiO2 nanopowder capped with PACMA, termed PACMA@TiO2, according to X-ray diffraction and infrared spectroscopy characterization methods. Elemental analysis denotes the presence in the powder of a small amount of ammonium. Transmission and scanning electron microscopies show that the material is constituted by needles of ca. 200 nm in length, fused into star-like particles. Selected area electron diffraction analysis indicates that the particles are aggregated and only partially organized. The dried powdered material can easily be dispersed in water. The colloidal suspension obtained is highly stable, and its potential application in heavy metal adsorption is demonstrated with aqueous Pb(II), followed by using inductively coupled plasma optical emission spectrometry.

Amino Acid Functionalized Hydrotalcites for Gene Silencing

2020 ◽  
Vol 20 (6) ◽  
pp. 3387-3397
Author(s):  
Nirasha Nundkumar ◽  
Sooboo Singh ◽  
Moganavelli Singh
Keyword(s):  
Amino Acid ◽  
Gene Silencing ◽  
Inductively Coupled Plasma ◽  
Binding Capacity ◽  
Optical Emission ◽  
Precipitation Method ◽  
Inductively Coupled ◽  
Cytotoxicity Studies ◽  
Co Precipitation

Hydrotalcites and amino acid functionalized hydrotalcites (aa-HTs) were synthesized using the co-precipitation method. These compounds were characterized using X-ray diffraction (XRD), inductively coupled plasma-optical emission spectroscopy (ICP-OES), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and nanoparticle tracking analysis (NTA). The optimal siRNA binding capacity was determined using gel retardation assays. Cytotoxicity studies using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay showed that the siRNA:HT complexes were relatively non-cytotoxic to HeLa-tat-luc cells. Gene silencing studies showed that the aa-HTs elicited significantly higher levels of gene knockdown when compared to the non-functionalized HTs. Overall, these HTs have shown the potential to bind, protect and efficiently deliver siRNA, in vitro.

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