Selective Oxidation of Cyclohexane to Cyclohexanone and Cyclohexanol over Au/Co3O4 Catalyst

2011 ◽  
Vol 284-286 ◽  
pp. 806-810
Author(s):  
Jun Wan ◽  
Jing Zhao ◽  
Ming Qiao Zhu ◽  
Huan Dai ◽  
Lei Wang
Keyword(s):  
Selective Oxidation ◽  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Precipitation Method ◽  
Emission Spectrometry ◽  
X Ray Diffraction ◽  
Plasma Atomic Emission Spectrometry ◽  
Inductively Coupled ◽  
Transmission Electron ◽  
Co Precipitation

Au/Co3O4catalysts were prepared by a co-precipitation method and characterized by inductively coupled plasma-atomic emission spectrometry (ICP-AES), transmission electron microscope (TEM) and X-ray diffraction (XRD). The selective oxidation of cyclohexane to cyclohexanone and cyclohexanol was investigated over Au/Co3O4catalysts using molecular oxygen as oxidant. These catalysts showed higher activities as compared to the pure Co3O4under the same reaction conditions.

Synthesis and Characterisation of Tb4L3(Phen)0.75•7H2O Nanorods

2011 ◽  
Vol 194-196 ◽  
pp. 878-881
Author(s):  
Hui Juan Ren ◽  
Zhen Feng Cui ◽  
De Hui Sun ◽  
Guang Yan Hong
Keyword(s):  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Precipitation Method ◽  
Rare Earth Complex ◽  
X Ray Diffraction ◽  
Strong Absorption Band ◽  
Inductively Coupled ◽  
Transmission Electron ◽  
Thermogravimetric Curve ◽  
Co Precipitation

The rare earth complex terbium (III)-pyromellitic acid (H4L)-1,10-phenanthroline (phen) nanorod was synthesized in the polyvinylpyrrolidone (PVP) matrix by a co-precipitation method. The chemical composition of the as-synthesized sample was speculated to be PVP/Tb4L3(phen)0.75∙7H2O by elemental analysis, inductively coupled plasma-atomic emission spectroscopy (ICP-AES), and Fourier transform infrared spectroscopy (FTIR). The transmission electron microscopy (TEM) result exhibited that the as-synthesized sample was nanorods with diameters of ca. 150 nm. The X-ray diffraction pattern (XRD) of the sample showed that it was a crystalline complex. The thermogravimetric curve (TGA) analysis exhibited that the sample is stable below 450 °C. UV–Vis diffuse reflectance spectra exhibited that there is a broad and strong absorption band in the range of 280-350 nm. The photoluminescence analyses (PLA) indicated that the as-synthesized sample emitted the characteristic green fluorescence of Tb (III) ions under ultraviolet light excitation.

scholarly journals Influence of diatomite microstructure on its adsorption capacity for Pb(II)

2009 ◽  
Vol 41 (3) ◽  
pp. 309-317 ◽  
Author(s):  
S. Nenadovic ◽  
M. Nenadovic ◽  
R. Kovacevic ◽  
Lj. Matovic ◽  
B. Matovic ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Emission Spectrometry ◽  
Wastewater Remediation ◽  
X Ray Diffraction ◽  
Plasma Atomic Emission Spectrometry ◽  
Force Microscopy ◽  
Inductively Coupled ◽  
Atomic Force ◽  
Treated Sample

The effect of microstructural changes caused by mechanical modification on adsorption properties of diatomite samples were investigated. The microstructure has been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM) while the degree of metal adsorption was evaluated by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP AES). The results show that metal sorption capacity of diatomite is considerably improved after mechanical modification and it can be attributed to amorphysation of the material. Immobilization efficiency increased from 22% for untreated to 81% for the treated sample after 5h at BPR 4.This qualifies natural diatomite as a material for wastewater remediation.

Synthesis and Characterization of Bismuth Nickel Tantalate Pyrochlore

2015 ◽  
Vol 749 ◽  
pp. 30-35 ◽  
Author(s):  
Asiah Abdullah ◽  
Wan Elina Faradilla Wan Khalid ◽  
Siti Zaubidah Abdullah
Keyword(s):  
Inductively Coupled Plasma ◽  
Single Phase ◽  
Atomic Emission ◽  
Emission Spectrometry ◽  
X Ray Diffraction ◽  
Plasma Atomic Emission Spectrometry ◽  
Inductively Coupled ◽  
Cubic System ◽  
Ft Ir ◽  
Single Phase Material

Bi3Ni2Ta3O14 pyrochlores and related materials were prepared by solid state reaction at sintering temperatures ranging from 900°C to 1150°C. The BNT cubic pyrochlores could be represented by a general formula Bi3Ni2-xTa3O14-x and phase pure sample was obtained at temperature 1050°C with x = 0.6. This was confirmed by X-ray diffraction analysis and detailed lattice refinement. The single phase material crystallized in a cubic system, space group Fd3m with a = b = c = 10.5134 Å, α = β = γ = 90o, respectively. The sample was further characterized using a combination of techniques including Fourier-Transform infrared spectroscopy (FT-IR), differential thermal analysis (DTA), thermogravimetric analysis (TGA) and inductively coupled plasma – atomic emission spectrometry (ICP-AES). The material was thermally stable without any thermal events being observed. Electrical properties of the single phase material were studied by ac impedance spectroscopy starting from room temperature to 800 oC over a frequency range of 5 Hz to 13 MHz. The phase formation and solid solutions of cubic pyrochlores in the Bi2O3-NiO-Ta2O5 (BNT) ternary system were studied thoroughly via combination of characterization techniques.

Microstructure and Electrochemical Properties of a LaMgAlMnCoNi Based Alloy for Ni/MH Batteries

2012 ◽  
Vol 727-728 ◽  
pp. 80-84 ◽  
Author(s):  
Eliner Affonso Ferreira ◽  
J.M. Serra ◽  
Julio César Serafim Casini ◽  
Hidetoshi Takiishi ◽  
Rubens Nunes de Faria Jr.
Keyword(s):  
Electrochemical Properties ◽  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Emission Spectrometry ◽  
X Ray Diffraction ◽  
Cast State ◽  
Plasma Atomic Emission Spectrometry ◽  
X Ray ◽  
Inductively Coupled ◽  
Type Test

The microstructure and electrochemical properties of a La0.7Mg0.3Al0.3Mn0.4Co0.5Ni3.8 hydrogen storage alloy have been studied. The anode was prepared using a mixture of the ingot alloy in the as-cast state with carbon black and polytetrafluoroethylene (PTFE) as a binder. A Ni (OH)2 electrode was used as the cathode of the square-type test cell. A separator was used together with a 6M KOH electrolyte. Microstructure and phase composition of the alloy have been investigated using inductively coupled plasma atomic emission spectrometry (ICP-AES), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and X-ray diffraction analysis (XRD). A niobium-containing alloy has also been included for a comparison.

scholarly journals Anti-Biofilm Action of Biological Silver Nanoparticles Produced by Aspergillus tubingensis and Antimicrobial Activity of Fabrics Carrying it

2021 ◽  
Vol 11 (6) ◽  
pp. 14764-14774
Keyword(s):  
Silver Nanoparticles ◽  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Emission Spectrometry ◽  
Aspergillus Tubingensis ◽  
Plasma Atomic Emission Spectrometry ◽  
Polyester Fabrics ◽  
Inductively Coupled ◽  
Transmission Electron ◽  
Hospital Acquired

Biological silver nanoparticles (AgNPs) were synthesized using the marine endophytic fungus Aspergillus tubingensis and inhibited Bacillus subtilis biofilm formation at low concentrations. Cotton and polyester fabrics impregnated with AgNPs were analyzed by transmission electron microscopy (TEM), and the concentration of AgNPs in both fabrics was determined using inductively-coupled plasma atomic emission spectrometry (ICP-AES). The fabrics carrying the AgNPs inhibited the Staphylococcus aureus and Escherichia coli growth by 100%. Both fabrics impregnated one time with AgNPs inhibited yeasts' clinical species' growth, Candida albicans, Candida glabrata, and Candida parapsilosis, from 80.1% to approximately 98.0%. Besides the anti-biofilm effect, the AgNPs impregnation process on cotton and polyester fabrics was highly efficient, and both fabrics presented antimicrobial effects against clinically relevant bacteria and yeast species. The results evidence that functionalized textiles containing these biological AgNPs can play an essential role in combating pathogenic microorganisms. Thereby offering an alternative to design effective solutions, mainly for hospital garments and biomedical devices, to avoid microorganisms transmissions and hospital-acquired nosocomial infections.

scholarly journals Defluoridation of water by Ce-Ti hybrid oxide nanoparticles

2021 ◽  
Vol 947 (1) ◽  
pp. 012026
Author(s):  
Trung Dang-Bao ◽  
Hoa-Hung Lam ◽  
Thi-Hoai-Linh Dang
Keyword(s):  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Precipitation Method ◽  
Fluoride Removal ◽  
X Ray Diffraction ◽  
Langmuir Adsorption ◽  
Inductively Coupled ◽  
Adsorption Capacities ◽  
Defluoridation Of Water ◽  
Co Precipitation

Abstract In the present work, Ce-Ti and Ce-Ti/Fe3O4 hybrid oxides were prepared by co-precipitation method and then characterized by X-ray diffraction (XRD), inductively coupled plasma atomic emission spectroscopy (ICP-AES) and scanning electron microscope (SEM) techniques. The nano-adsorbents were applied to remove fluoride (with the concentration range of 10–30 mg L−1) from aqueous solution, reaching the adsorption equilibrium within 30–60 minutes. Practically, the fluoride removal onto both nanomaterials was efficient at the neutral pH (pH 5–7) and obeyed the Langmuir adsorption isotherm with the maximum adsorption capacities of 22.78 mg g–1 (Ce-Ti) and 20.28 mg g–1 (Ce-Ti/Fe3O4) at room temperature.

Synthesis and Characterization of PVP/Eu4/3L(phen)•2H2O Luminescent Complex

2011 ◽  
Vol 121-126 ◽  
pp. 1500-1503
Author(s):  
Hui Juan Ren ◽  
Hua Yang ◽  
De Hui Sun ◽  
Zhen Feng Cui ◽  
Guang Yan Hong
Keyword(s):  
Electron Microscopy ◽  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Precipitation Method ◽  
X Ray Diffraction ◽  
Pyromellitic Acid ◽  
Inductively Coupled ◽  
Transmission Electron ◽  
Ft Ir

Rare earth europium (Eu(III))-pyromellitic acid (H4L)-1,10-phenanthroline (phen) ternary luminescent complex has been synthesized in polyvinylpyrrolidone (PVP) matrix by precipitation method. The chemical constitution of the complex has been demonstrated as PVP/EuL4/3L(phen)•2H2O by a combination of elemental analysis, inductively coupled plasma-atomic emission spectroscopy (ICP-AES) and Fourier-transform infrared spectroscopy (FT-IR). X-ray diffraction analysis (XRD) has shown that the complex is a new kind of crystal whose structure is totally different from two ligands. The morphology of the complex has been investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results have shown that the complex has a rodlike crystal structure and the diameter of the rod is about 400 nm. Thermogravimetric analysis (TG) has indicated that the luminescent complex is thermally stable below 300 °C. Photoluminescence spectra (PL) have revealed that the complex can emit Eu3+ characteristic red fluorescence under ultraviolet excitation.

Heat Treatment and Microstructural Studies of LaNi-Type Battery Electrode Alloys

2017 ◽  
Vol 899 ◽  
pp. 366-370
Author(s):  
Eliner Affonso Ferreira ◽  
Lusinete Pereira Barbosa ◽  
Rubens Nunes de Faria Jr.
Keyword(s):  
Heat Treatment ◽  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Emission Spectrometry ◽  
Electrochemical Characteristics ◽  
X Ray Diffraction ◽  
Plasma Atomic Emission Spectrometry ◽  
X Ray ◽  
Inductively Coupled ◽  
Battery Electrode

The effects of annealing on the microstructures and electrochemical characteristics of a La0.7Mg0.3Al0.3Mn0.4Co0.5Ni3.8 hydrogen storage alloy have been studied. The heat treatment by vacuum annealing was carried out at 700 °C, 800 °C, 900 °C and 1000 °C. The microstructure and phase composition of the alloy have been investigated using inductively coupled plasma - atomic emission spectrometry (ICP-AES), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and X-ray diffraction analysis (XRD). The battery anode was prepared using a mixture of the pulverized alloy with carbon black and polytetrafluoroethylene as a binder.

scholarly journals Green synthesis of hydratropic aldehyde from α-methylstyrene catalyzed by Al2O3-supported metal phthalocyanines

2019 ◽  
Vol 8 (1) ◽  
pp. 100-107 ◽  
Author(s):  
Fanfan Niu ◽  
Ying Jiang ◽  
Ping Chen ◽  
Licheng Zhan ◽  
Xiaoling Sun
Keyword(s):  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Emission Spectrometry ◽  
X Ray Diffraction ◽  
Plasma Atomic Emission Spectrometry ◽  
Metal Phthalocyanines ◽  
Inductively Coupled ◽  
Uv Visible ◽  
First Time ◽  
Supported Metal

Abstract This report presents a study of synthesis of hydratropic aldehyde from α-methylstyrene employing Al2O3-supported metal phthalocyanines as catalyst, molecular oxygen as oxidant and isobutyraldehyde as co-oxidant. The catalytic system was applied in the synthesis of hydratropic aldehyde for the first time. Under optimal conditions, the conversion of α-methylstyrene reached 99%, whereas the selectivity of hydratropic aldehyde reached 85.14%. Possible reaction mechanism and the effects of different factors on oxidation reaction were investigated. Aluminum oxide-supported metal (M = Co, Ni, and Fe) phthalocyanine catalysts (MPc/Al2O3) were prepared using the “ship-in-a-bottle” method by synthesizing metallophthalocyanines in support holes. Obtained catalysts were characterized by N2 adsorption, Brunauer-Emmett-Teller surface area (BET), inductively-coupled plasma atomic emission spectrometry (ICP-AES), IR, UV-Visible (UV-Vis), and X-ray diffraction (XRD).

scholarly journals Synthesis of Highly Emissive CdSe Quantum Dots by Aqueous Precipitation Method

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Bing Gao ◽  
Chao Shen ◽  
Shuanglong Yuan ◽  
Yunxia Yang ◽  
Guorong Chen
Keyword(s):  
Quantum Dots ◽  
Inductively Coupled Plasma ◽  
Atomic Emission ◽  
Precipitation Method ◽  
Emission Spectrometry ◽  
Cdse Quantum Dots ◽  
Cdse Qds ◽  
Plasma Atomic Emission Spectrometry ◽  
Inductively Coupled ◽  
Zinc Blende

CdSe quantum dots (QDs) with high quantum yield (QY) up to 76.57% are synthesized using the aqueous precipitation method. With the control ofSeSO32-concentration in Se precursor, the nucleation speed and concentration of CdSe QDs are increased. The mass of obtained Cd2+and Se2+in nanocrystal is measured by inductively coupled plasma atomic emission spectrometry (ICP-AES). XRD and HRTEM are used to identify the crystal phase and morphology of the products which are pure CdSe crystals in the cubic zinc blende phase and uniformly dispersed in the solution with the size between 2 nm and 2.3 nm. Results demonstrate that the emission wavelength of CdSe QDs is 500 nm~560 nm along with the increased temperature 50°C~90°C and prolonged time 5 min~25 min.

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