scholarly journals Sintesis Satu Langkah Senyawa Oksotrinuklir dengan Terminal Ligan Piridin [Ru3O(OOCC6H5)6(C5H5N)3]ClO4

2013 ◽  
Vol 3 (2) ◽  
Author(s):  
Aldes Lesbani ◽  
Risfidian Mohadi ◽  
Eliza Eliza
Keyword(s):  
Mass Spectrometer ◽  
Ftir Spectrum ◽  
Terminal Ligand ◽  
Molecular Ion ◽  
One Step ◽  
Fragment Peak ◽  
Ft Ir

Abstrak Telah disintesis senyawa oksotrinuklir dengan terminal ligan piridin [Ru3O(OOCC6H5)6(C5H5N)3]ClO4. Senyawa oksotrinuklir hasil sintesis dikarakterisasi menggunakan spektrofotometer FT-IR dan spektrometer massa. Hasil identifikasi dengan spektrofotometer FT-IR menunjukkan senyawa oksotrinuklir hasil sintesis memiliki vibrasi khas pada bilangan gelombang 698 cm-1. Pengukuran menggunakan spektrometer massa menkonfirmasi bahwa senyawa oksotrinuklir memiliki ligan terminal piridin yang mudah terfragmentasi yang ditandai dengan puncak ion molekul pada m/z 1283,14 dan puncak ion fragmen pada m/z 1205,09 yang mengindikasikan lepasnya satu molekul piridin sebagai terminal ligan. Kata kunci : senyawa oksotrinuklir, sintesis satu langkah, ruthenium, piridin.   Abstract Synthesis of oxotrinuclear with pyridine as terminal ligand [Ru3O(OOCC6H5)6 (C5H5N)3]ClO4 has been carried out. Oxotrinuclear compound from synthesis was characterized using FT-IR spectrophotometer and mass spectrometer. The FTIR spectrum shows that oxotrinuclear compound has vibration at wavelength 698 cm-1 and mass spectrometer spectrum shows oxotrinuclear compound has pyridine as terminal ligand which easily fragmented indicated by molecular ion peak at m/z 1283.14 and ion fragment peak at m/z 1205.09. These values revealed one molecule of pyridine lost from terminal ligand. Keywords : oxotrinuclear compound, one step synthesis, ruthenium, pyridine.

scholarly journals Hydrothermal Synthesis of Sodalite-Type N-A-S-H from Fly Ash to Remove Ammonium and Phosphorus from Water

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2741
Author(s):  
Pengcheng Lv ◽  
Ruihong Meng ◽  
Zhongyang Mao ◽  
Min Deng
Keyword(s):  
Fly Ash ◽  
Adsorption Capacity ◽  
Removal Rate ◽  
Kinetic Studies ◽  
Solute Concentration ◽  
Raw Material ◽  
Sodium Aluminosilicate ◽  
Equilibrium Data ◽  
One Step ◽  
Ft Ir

In this study, the hydrated sodium aluminosilicate material was synthesized by one-step hydrothermal alkaline desilication using fly ash (FA) as raw material. The synthesized materials were characterized by XRD, XRF, FT-IR and SEM. The characterization results showed that the alkali-soluble desilication successfully had synthesized the sodium aluminosilicate crystalline (N-A-S-H) phase of sodalite-type (SOD), and the modified material had good ionic affinity and adsorption capacity. In order to figure out the suitability of SOD as an adsorbent for the removal of ammonium and phosphorus from wastewater, the effects of material dosing, contact time, ambient pH and initial solute concentration on the simultaneous removal of ammonium and phosphorus are investigated by intermittent adsorption tests. Under the optimal adsorption conditions, the removal rate of ammonium was 73.3%, the removal rate of phosphate was 85.8% and the unit adsorption capacity reached 9.15 mg/L and 2.14 mg/L, respectively. Adsorption kinetic studies showed that the adsorption of ammonium and phosphorus by SOD was consistent with a quasi-secondary kinetic model. The adsorption isotherm analysis showed that the equilibrium data were in good agreement with the Langmuir and Freundlich model. According to thermodynamic calculations, the adsorption of ammonium and phosphorus was found to be a heat-absorbing and spontaneous process. Therefore, the preparation of SOD by modified FA has good adsorption properties as adsorbent and has excellent potential for application in the removal of contaminants from wastewater.

One Step Synthesis and Characterization of Zirconia-Graphene Composites

2012 ◽  
Vol 600 ◽  
pp. 174-177 ◽  
Author(s):  
Jian Fei Xia ◽  
Zong Hua Wang ◽  
Yan Zhi Xia ◽  
Fei Fei Zhang ◽  
Fu Qiang Zhu ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
X Ray ◽  
Graphene Composite ◽  
Transmission Electron ◽  
One Step ◽  
Ft Ir ◽  
Xrd Techniques

Zirconia-graphene composite (ZrO2-G) has been successfully synthesized via decomposition of ZrOCl2•6H2O in a water-isopropanol system with dispersed graphene oxide (GO) utilizing Na2S as a precursor could enable the occurrence of the deposition of Zr4+ and the deoxygenation of GO at the same time. Transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) techniques were used to characterize the samples. It was found that graphene were fully coated with ZrO2, and the ZrO2 existing in tetragonal phase, which resulted in the formation of two-dimensional composite.

scholarly journals Quinazolin-4(3H)-ones and 5,6-Dihydropyrimidin-4(3H)-ones from β-Aminoamides and Orthoesters

Molecules ◽  
2018 ◽  
Vol 23 (11) ◽  
pp. 2925 ◽  
Author(s):  
Joshua Gavin ◽  
Joel Annor-Gyamfi ◽  
Richard Bunce
Keyword(s):  
Acetic Acid ◽  
Melting Point ◽  
1H Nmr ◽  
13C Nmr ◽  
Pressure Tube ◽  
Absolute Ethanol ◽  
Basic Nitrogen ◽  
One Step ◽  
Ft Ir

Quinazolin-4(3H)-ones have been prepared in one step from 2-aminobenzamides and orthoesters in the presence of acetic acid. Simple 2-aminobenzamides were easily converted to the heterocycles by refluxing in absolute ethanol with 1.5 equivalents of the orthoester and 2 equivalents of acetic acid for 12–24 h. Ring-substituted and hindered 2-aminobenzamides as well as cases incorporating an additional basic nitrogen required pressure tube conditions with 3 equivalents each of the orthoester and acetic acid in ethanol at 110 °C for 12–72 h. The reaction was tolerant towards functionality on the benzamide and a range of structures was accessible. Workup involved removal of the solvent under vacuum and either recrystallization from ethanol or trituration with ether-pentane. Several 5,6-dihydropyrimidin-4(3H)-ones were also prepared from 3-amino-2,2-dimethylpropionamide. All products were characterized by melting point, FT-IR, 1H-NMR, 13C-NMR, and HRMS.

scholarly journals Mass spectrometry analysis of polychlorinated biphenyls: Chemical ionization and selected ion chemical ionization using methane as a reagent gas

2000 ◽  
Vol 65 (5-6) ◽  
pp. 431-438 ◽  
Author(s):  
Tatjana Vasiljevic ◽  
Mila Lausevic ◽  
Raymond March
Keyword(s):  
Quantitative Analysis ◽  
Polychlorinated Biphenyls ◽  
Mass Spectrometer ◽  
Chemical Ionization ◽  
Quadrupole Ion Trap ◽  
Mass Spectrometry Analysis ◽  
Fragmentation Pattern ◽  
Gas Chromatograph ◽  
Molecular Ion ◽  
Fragment Ions

In the present paper a quadrupole ion trap mass spectrometer, coupled with a gas chromatograph, was used to compare the electron impact ionization (EI) and chemical ionization (Cl) technique, in terms of their selectivity in polychlorinated biphenyls (PCBs) quantitative analysis. The experiments were carried out with a modified Varian SATURN III quadrupole ion-storage mass spectrometer equipped with Varian waveform generator, coupled with a gas chromatograph with DB-5 capillary column. The disadvantage of using EI in the analysis of PCBs congeners is the extensive fragmentation of the molecular ion. The main fragmentation pattern recorded in the EI mass spectra of PCBs was the loss of a chlorine atom from the molecular ion. Therefore the fragment-ion signal overlapped with the molecular-ion cluster of lower mass congener. The fragmentation reactions of PCBs are suppressed if methane is used as a reagent gas for chemical ionization, but fragment ions are also present in the spectrum as an obstruction for quantitative analysis. The most selective method for PCBs quantitative analysis appears to be Cl with mass-selected C2H5 + ions from methane, which results in a mass spectrum with a negligible amount of fragment ions.

scholarly journals Enhanced Poly(propylene carbonate) with Thermoplastic Networks: A Cross-Linking Role of Maleic Anhydride Oligomer in CO2/PO Copolymerization

Polymers ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1467 ◽  
Author(s):  
Lijun Gao ◽  
Meiying Huang ◽  
Qifeng Wu ◽  
Xiaodan Wan ◽  
Xiaodi Chen ◽  
...  
Keyword(s):  
Weight Loss ◽  
Maleic Anhydride ◽  
Propylene Carbonate ◽  
Permanent Deformation ◽  
Cross Linking ◽  
Biodegradable Poly ◽  
One Step ◽  
Ft Ir ◽  
Poly Propylene

Cross-linking is an effective way to enhance biodegradable poly(propylene carbonate) (PPC) from CO2 and propylene oxide (PO). Cross-linked PPC can be prepared by one-step terpolymerization of multifunctional third monomers with CO2 and PO. However, few such third monomers are available. Each molecule of maleic anhydride oligomer (MAO) contains more than two cyclic anhydride groups. Here, we use it to synthesize PPC with cross-linked networks by adding a small quantity of MAO (0.625–5 wt% of PO) in CO2/PO copolymerization that was catalyzed by zinc glutarate. The formation of networks in the prepared copolymers was confirmed by the presence of gel in copolymers combined Fourier transform infrared spectroscopy (FT-IR), 1H NMR, and the improved mechanical properties. The 5% weight-loss degradation temperatures and maximum weight-loss degradation temperatures greatly increase up to 289.8 °C and 308.8 °C, respectively, which are remarkably high when compared to those of PPC. The minimum permanent deformation of the copolymers closes to 0, while that of PPC is 173%. The maximum tensile strength of the copolymers is 25.5 MPa higher than that of PPC, reaching 38.4 MPa, and it still has some toughness with the elongation at break of 25%. The above phenomena indicate that MAO that was inserted in PPC chains play a cross-linking role, which results in enhanced thermal stability, dimensional stability, and mechanical strength, comprehensively.

scholarly journals A facile method to fabricate AC/CuO for efficient removal of organic pollutants by adsorption and persulfate-based advanced oxidation processes

2020 ◽  
Author(s):  
Youlin Li ◽  
Yu Hu ◽  
Wenqiao You ◽  
Guangming Zhou ◽  
Guilong Peng
Keyword(s):  
Catalytic Performance ◽  
Catalytic Degradation ◽  
Maximum Adsorption Capacity ◽  
Efficient Removal ◽  
X Ray ◽  
One Step ◽  
Ft Ir ◽  
Degradation Reaction ◽  
The Relationship ◽  
Insight Into

Abstract Activated carbon/CuO (AC/CuO) composites was prepared through a facile one-step hydrothermal method and used as a bifunctional material for adsorption and catalysis degradation of bisphenol A (BPA). The composite was characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and X-ray powder diffraction (XRD). The obtained AC/CuO exhibited excellent adsorption and catalytic performance. The maximum adsorption capacity of BPA on the AC/CuO was 319.03 mg/g according to the Langmuir fitting. At an initial BPA concentration of 20 mg/L, the BPA degradation efficiencies were maintained above 96% for 15 min by using 20 mg/L AC/CuO and 2 mM peroxymonosulfate (PMS). Moreover, the relationship between adsorption and catalytic degradation was also investigated. The results indicated that the pre-adsorption disfavored the degradation reaction. This work not only provides a novel preparation method for AC/CuO catalyst, but also gives a deeper insight into the mechanisms between adsorption and catalytic degradation.

scholarly journals One-Step Synthesis of the Nitrogen and Sulfur Codoped Carbon Dots for Detection of Lead and Copper Ions in Aqueous Solution

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Hui Gao ◽  
Yuqian Pang ◽  
Lei Li ◽  
Chun Zhu ◽  
Chaoqun Ma ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Carbon Dots ◽  
Copper Ions ◽  
Size Distributions ◽  
Colorimetric Sensing ◽  
Emission Activity ◽  
One Step ◽  
Ft Ir ◽  
The Fourier Transform ◽  
Metal Ions Detection

Herein, by using the green and cheap L-cysteine as the precursor, nitrogen and sulfur codoped carbon dots (NS-CDs) were synthesized via a facile one-step hydrothermal method. The obtained NS-CDs showed the relatively narrow size distributions (2.1~3.9 nm) with the lattice spacing of 0.29 nm, as well as the excitation-dependent photoluminescence (PL) emission activity with the quantum yield (QY) of 18%. More interestingly, the PL intensity of NS-CDs was quenched by the addition of copper or lead ions (Cu2+ or Pb2+), which was shown in the tradition detection method by PL spectra. The NS-CDs exhibited ultrasensitive colorimetric sensing capability for both Cu2+ and Pb2+ by the color variance using naked eyes without any further treating. Two different coupling ways for detecting Pb2+ and Cu2+ were induced by the analysis of the Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). And the as-prepared NS-CDs showed their potential application in the heavy metal ions detection for the wastewater determination.

Methanobactin-Mediated One-Step Synthesis of Palladium Nanoparticles

NANO ◽  
2016 ◽  
Vol 11 (06) ◽  
pp. 1650064 ◽  
Author(s):  
Jia-Ying Xin ◽  
Hong-Chen Fan ◽  
Sheng-Fu Ji ◽  
Yan Wang ◽  
Chun-Gu Xia
Keyword(s):  
Photoelectron Spectroscopy ◽  
Palladium Nanoparticles ◽  
Fluorescence Spectra ◽  
Copper Binding ◽  
Secondary Nucleation ◽  
Visible Spectra ◽  
One Step ◽  
Ft Ir ◽  
Uv Visible ◽  
The One

The development of palladium nanoparticles (PdNPs) with a narrow size distribution is an important aspect of nanotechnology. Methanobactin (Mb) is a copper-binding small peptide that appears to function as an agent for copper sequestration and uptake in methanotrophs. Here, Mb was shown to bind and catalytically reduce Pd (II) to Pd (0). The one-step synthesis of monodisperse PdNPs using Mb as both coordination agent and reduction agent is reported. Fluorescence spectra, UV-visible spectra, X-ray photoelectron spectroscopy (XPS) and Fourier transform-infrared spectroscopy (FT-IR) suggested that the Mb molecules catalytically reduce Pd (II) to Pd (0) with the concomitant production of PdNPs. The Mb is then adsorbed onto the surface of the PdNPs to form an Mb–PdNPs coordination compound. This avoids secondary nucleation. The PdNPs are small with high monodispersity and are easily synthesized in Mb solution. The PdNPs were extremely stable and resisted aggregation even after several months.

One-Step Preparation of Fibrous Aggregates of Gold Nanoparticles Using Aniline as Reducing Agent as well as Monomer

2007 ◽  
Vol 121-123 ◽  
pp. 251-254 ◽  
Author(s):  
Zhi Rui Guo ◽  
Y. DuanMu ◽  
Ning Gu
Keyword(s):  
Gold Nanoparticles ◽  
Reducing Agent ◽  
Time Dependent ◽  
Polymerization Process ◽  
Simultaneous Reduction ◽  
Transmission Electron ◽  
Ethanol Medium ◽  
One Step ◽  
Ft Ir ◽  
Medium Time

Nanoscaled fibrous aggregates of gold nanoparticles have been synthesized by a simultaneous reduction-oxidation polymerization process using aniline as reducing agent as well as monomer in an ethanol medium. Time-dependent UV-Vis absorption spectroscopy was used to track the formation process of gold nanoparticles. The transmission electron microscopy (TEM) images and Fourier transform infrared (FT-IR) spectrum of the as-preapred products indicate these gold nanoparticles were binded by the oxidation polymerization resultant of aniline.

Characterization and Evaluation of Ca/Al LDHs Adsorbents Synthesized by a One-Step Hydrothermal Method for Congo Red Removal

2020 ◽  
Vol 977 ◽  
pp. 195-200
Author(s):  
Hong Tham Thi Nguyen ◽  
Dao Thi To Uyen ◽  
Duy Chinh Nguyen ◽  
Van Thuan Tran ◽  
Tri Duc Lam ◽  
...  
Keyword(s):  
Congo Red ◽  
Fourier Transforms ◽  
X Ray Diffraction ◽  
Anionic Dyes ◽  
One Step ◽  
Ft Ir ◽  
Fourier Transforms Infrared Spectroscopy ◽  
Hydrothermal Approach ◽  
Double Hydroxide ◽  
Hydrolysis Of

We investigated the fabrication of Ca/Al layered double hydroxide (LDHs) via a one-step hydrothermal approach with slow hydrolysis of urea at a low temperature without further annealing required. The as-synthesized Ca/Al LDHs nanostructures obtained were defined using Fourier transforms infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), powder X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results demonstrated that Ca/Al LDHs exhibit excellent adsorption performance on Congo red anionic dyes in aqueous solution. The adsorption capacity of the Ca/Al LDHs toward Congo red was found to be 59.41 mg/g.

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