Polyaniline Nanofibers Prepared with Binary Oxidant at the Presence of Para-Phenylenediamine

2017 ◽  
Vol 898 ◽  
pp. 2354-2359
Author(s):  
Peng Fei Qian ◽  
Tao Li ◽  
Bang Lei Liang ◽  
Zong Yi Qin
Keyword(s):  
Chemical Structure ◽  
Ammonium Persulfate ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
Chemical Polymerization ◽  
X Ray ◽  
Polyaniline Nanofibers ◽  
Infrared And Raman Spectroscopy ◽  
Visible Absorption Spectroscopy

Polyaniline nanofibers were facially synthesized by the chemical polymerization with binary oxidant containing ammonium persulfate and ferric chloride at the presence of para-phenylenediamine. For a better comparison, the polymerization with single oxidant was also carried out. The effect of binary oxidant on the morphology and structure was systematically investigated for better understanding the role of oxidant in the formation of nanostructures. The morphology, chemical structure as well as crystalline and thermal property were characterized by field emission scanning electron microscopy, ultraviolet-visible absorption spectroscopy, Fourier transform infrared and Raman spectroscopy, X-ray diffraction and thermogravimetric analysis.

Synthesis and Characterizations of Nanocubes, Monodispersed Nanocrystals and Nanospheres of Au

2007 ◽  
Vol 353-358 ◽  
pp. 2163-2166
Author(s):  
Ming Yang ◽  
Guo Qing Zhou ◽  
Jiang Guo Zhao ◽  
Zhan Jun Li
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Powder Diffraction ◽  
Visible Absorption ◽  
X Ray ◽  
Transmission Electron ◽  
Uv Visible ◽  
Scherrer Formula ◽  
Visible Absorption Spectroscopy

Nanocubes, monodispersed nanocrystals and nanospheres of Au have been prepared by a simple reaction between HAuCl4·4H2O, NaOH and NH2OH·HCl in the presence of gelatin. The role of gelatin and the affection of pH in producing the nanoparticles of Au were discussed. The products were characterized by X-ray powder diffraction, transmission electron microscopy, and UV-visible absorption spectroscopy. The sizes of the monodispersed nanocrystals of Au were estimated by Debye-Scherrer formula according to XRD spectrum.

scholarly journals Biosintesis Nanopartikel Perak menggunakan Ekstrak Daun Ketapang, Modifikasi dengan Asam p-kumarat untuk Aplikasi Deteksi Melamin

2017 ◽  
Vol 4 (2) ◽  
pp. 367-372
Author(s):  
Andi Rusnaenah ◽  
Muhammad Zakir ◽  
Prastawa Budi
Keyword(s):  
Silver Nanoparticles ◽  
Surface Plasmon Resonance ◽  
Leaf Extract ◽  
Reduction Method ◽  
Coumaric Acid ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
X Ray ◽  
Unit Cells ◽  
Visible Absorption Spectroscopy

Biosynthesis of silver nanoparticles (AgNPs) using ketapang leaf extract, modification with p-coumaric acid for detecting melamine has conducted. This research aimed to synthesize AgNPs via bio-reduction method using ketapang leaf extract followed by modification with p-coumaric acid (APK), and evaluating its application detecting melamine. The AgNPs were characterized through ultraviolet-visible absorption spectroscopy (UV-Vis) and X-ray diffraction (XRD). Observation suggested that an increase of incubation time had affected its surface Plasmon resonance trend. Further analysis of crystallite via XRD suggested that nanoparticle size at 43 nm estimated using Debye-Scherer, within the form of unit cells is cubic. The performance of product as melamine detector suggested that the AgNPs-APK had detected melamine in range of concentration from 0.1 to 1000 ppm.

The Hydrothermal Synthesis of ZrO2 Nanoparticles and their Optical Absorption Properties

2013 ◽  
Vol 873 ◽  
pp. 164-167
Author(s):  
Xiao Ming Fu
Keyword(s):  
Optical Absorption ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Absorption Properties ◽  
Tem Analysis ◽  
Visible Absorption ◽  
Ammonia Water ◽  
X Ray ◽  
Transmission Electron ◽  
Visible Absorption Spectroscopy

ZrO2 nanoparticles with a diameter range of less than 10 nm are successfully synthesized with zirconium nitrate as zirconium source and stronger ammonia water as precipitant at 210 °C for 48 h via the easy hydrothermal method. The phase, the morphologies and optical absorption properties of the samples have been characterized and analyzed by X-ray diffraction (XRD), field-emission transmission electron microscopy (TEM) and ultraviolet-visible absorption spectroscopy (UV-VIS), respectively. XRD analysis shows that the phase of as obtained samples is ZrO2. TEM analysis confirms that using stronger ammonia water as precipitant instead of NaOH and the increase of the reaction temperature are in favor of the synthesis of ZrO2 nanoparticles. And UV-VIS measurements show that ZrO2 nanoparticles have a good optical absorption property.

Synthesis and photocatalytic hydrogen evolution of meso-tetrakis(p-sulfonatophenyl)porphyrin functionalized platinum nanocomposites

2010 ◽  
Vol 14 (06) ◽  
pp. 540-546 ◽  
Author(s):  
Lingling Zhang ◽  
Yongtao Lu ◽  
Yukou Du ◽  
Ping Yang ◽  
Xiaomei Wang
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Antenna System ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
X Ray ◽  
Transmission Electron ◽  
Visible Absorption Spectroscopy

Meso-tetrakis(p-sulfonatophenyl)porphyrin (TPPS4) functionalized platinum nanocomposites were synthesized and characterized using ultraviolet-visible absorption spectroscopy (UV-vis), fluorescence spectroscopy (FL), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and X-ray diffraction (XRD) methods. The postulated configuration of TPPS4 functionalized platinum nanocomposite may be described as an antenna system containing a photoreceptive TPPS4 shell and a nanosize platinum core. Fluorescence and photoelectrochemistry studies of both TPPS4 and the platinum nanocomposites showed that efficient electron/energy transfer occurred from the TPPS4 donor to the metallic nanocore acceptor. TPPS4 functionalized platinum nanocomposites are photocatalytic active for water reduction to produce hydrogen. The turnover numbers (TONPt and TONTPPS4) and quantum yield of hydrogen (ϕH2) for the photocatalyst (nPt:nTPPS4= 250) were 44, 11056, and 1.8%, respectively, calculated on the basis of the total amount of H2 evolution for 12 h irradiation.

Synthesis of CuO Microspheres by the Simple Hydrothermal Method and their Optical Absorption Properties

2012 ◽  
Vol 562-564 ◽  
pp. 490-493
Author(s):  
Xiao Ming Fu
Keyword(s):  
Optical Absorption ◽  
Hydrothermal Method ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
X Ray Diffraction ◽  
Absorption Properties ◽  
Visible Absorption ◽  
X Ray ◽  
Cuo Microspheres ◽  
Visible Absorption Spectroscopy

CuO microspheres with a diameter range of 1~3 μm are successfully synthesized with 1 m mol CuCl2 as copper source and 3 m mol Na2CO3 as auxiliary salt at 180 °C for 24 h via the easy hydrothermal method. The phase, the morphologies and optical absorption properties of the samples have been characterized and analyzed by XRD (X-ray diffraction), SEM (Scanning electron microscope) and ultraviolet-visible absorption spectroscopy (UV-VIS), respectively. XRD analysis shows that the phase of as obtained samples is CuO. SEM analysis confirms that the increase of the the auxiliary salt is in favor of the synthesis of CuO microrods. And UV-VIS measurements show that CuO microspheres have a good optical absorption property.

Sonochemical synthesis of “sea-island” structure silver/polyaniline nanocomposites for the detection of l-tyrosine

2015 ◽  
Vol 30 (8) ◽  
pp. 1033-1044 ◽  
Author(s):  
Yanli Wang ◽  
Ling Bian ◽  
Dexin Tan ◽  
Sen Chen ◽  
Ying Gan
Keyword(s):  
Energy Dispersive Spectrometry ◽  
Differential Pulse ◽  
Nitrogen Atmosphere ◽  
X Ray Diffraction ◽  
Sonochemical Synthesis ◽  
Visible Absorption ◽  
Island Structure ◽  
X Ray ◽  
Pulse Voltammetry ◽  
Visible Absorption Spectroscopy

“Sea-island” structure silver/polyaniline (Ag/PANI) nanocomposites were synthesized through sonication of an aqueous solution with silver nitrate and aniline at the temperature of 20 ± 1°C under nitrogen atmosphere. The nanocomposites were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, ultraviolet–visible absorption spectroscopy, field emission scanning electron microscopy, and energy dispersive spectrometry, respectively. Furthermore, Ag/PANI nanocomposites were immobilized on the surface of glassy carbon electrode (GCE) and electroactivity behavior was investigated by cyclic voltammetry and differential pulse voltammetry. The obtained sea-island structured Ag/PANI nanocomposite-modified GCE showed high electrocatalytic activity for the oxidation of l-tyrosine.

The Influence of the Hydrothermal Temperature on the Morphologies and the Optical Absorption Properties of M-ZrO2 Nanoparticles

2013 ◽  
Vol 320 ◽  
pp. 11-14
Author(s):  
Xiao Ming Fu
Keyword(s):  
Optical Absorption ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Absorption Properties ◽  
Tem Analysis ◽  
Visible Absorption ◽  
Hydrothermal Temperature ◽  
X Ray ◽  
Transmission Electron ◽  
Visible Absorption Spectroscopy

M-ZrO2 nanoparticles with a diameter range of about 10 nm are successfully synthesized with zirconium nitrate as zirconium source and stronger ammonia water as precipitant at 210 °C for 48 h via the easy hydrothermal method. The phase, the morphologies and optical absorption properties of the samples have been characterized and analyzed by X-ray diffraction (XRD), field-emission transmission electron microscopy (TEM) and ultraviolet-visible absorption spectroscopy (UV-VIS), respectively. XRD analysis shows that the phase of as obtained samples is M-ZrO2. TEM analysis confirms that the increase of the reaction temperature is in favor of the synthesis of M-ZrO2 nanoparticles. And UV-VIS measurements show that M-ZrO2 nanoparticles have a good optical absorption property.

scholarly journals Copper nanoparticles prepared by pulsed exploding wire

2019 ◽  
Vol 13 (26) ◽  
pp. 128-138
Author(s):  
Hammad R. Humud
Keyword(s):  
Copper Nanoparticles ◽  
Visible Absorption Spectrum ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
Exploding Wire ◽  
X Ray ◽  
Lattice Periodicity ◽  
Uv Visible ◽  
Transmission Electronmicroscopy ◽  
Visible Absorption Spectroscopy

In this work copper nanopowder was created at different liquidmedias like DDDW, ethylene glycol and Polyvinylpyrrolidone(PVP). Copper nanopowder prepared using explosion wire processand investigated the effects of the exploding energy, wire diameter,the type of liquid on the particle size, and the particles sizedistribution. The nanoparticles are characterized by x-ray diffraction,UV-visible absorption spectroscopy and transmission electronmicroscopy (TEM). The x-ray diffraction results reveal that thenanoparticles continue to routine lattice periodicity at reducedparticle size. The UV-Visible absorption spectrum of liquid solutionfor copper nanoparticles shows sharp and single surface Plasmonresonance (SPR) peak centered at a wavelength of 590 nm inethylene glycol media, but don’t have peak in PVP fluid. This peakindicated the production of pure and spherical copper nanoparticle.

The Influence of the Hydrothermal Temperature on the Morphologies and the Optical Absorption Properties of CuO Microrods

2013 ◽  
Vol 320 ◽  
pp. 15-18
Author(s):  
Hu Sun ◽  
Xiao Ming Fu
Keyword(s):  
Optical Absorption ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Absorption Property ◽  
X Ray Diffraction ◽  
Absorption Properties ◽  
Visible Absorption ◽  
Hydrothermal Temperature ◽  
X Ray ◽  
Visible Absorption Spectroscopy

CuO microrods with a diameter range of 1-2 μm are successfully synthesized with 1 m mol CuCl2 as copper source and 1 m mol Na2CO3 as auxiliary salt at 240 °C for 24 h via the simple hydrothermal method. The phase, the morphologies and optical absorption properties of the samples have been characterized and analyzed by XRD (X-ray diffraction), SEM (Scanning electron microscope) and ultraviolet-visible absorption spectroscopy (UV-VIS), respectively. XRD analysis shows that the phase of as obtained samples is CuO. SEM analysis confirms that the increase of the reaction temperature is propitious to synthesize CuO microrods. And UV-VIS measurements show that CuO microrods have a good optical absorption property.

Sign in / Sign up

Export Citation Format

Share Document