Fabrication and Characterization of Nano-Sized Starch Particles

2015 ◽  
Vol 1120-1121 ◽  
pp. 275-280
Author(s):  
Hua Lin ◽  
Qing Li ◽  
Mu Feng ◽  
Li Zhao Qin
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Experimental Conditions ◽  
Transmission Electron ◽  
Infrared Spectrometer ◽  
Ft Ir ◽  
Plausible Mechanism ◽  
Fabrication And Characterization ◽  
The Fourier Transform

An efficient method of preparing nanostarch using high-intensity ultrasonic irradiation and acid hydrolysis was discussed. The transmission electron microscope (TEM) showed that the nanosized starch particles were in shape of sphere with the size of 80-120 nm, and their surfaces were rough with many flocci. The Fourier transform infrared spectrometer (FT-IR) revealed that the products maintained the original biological characteristics, and the molecules did not undergo any chemical changes. In addition, the effects of experimental conditions were analyzed and a plausible mechanism was proposed to explain the formation of the nanostarch.

Fabrication and Characterization of Carbon Nanofibers Carrying Ag Nanoparticles via Electrospinning

2007 ◽  
Vol 121-123 ◽  
pp. 123-126 ◽  
Author(s):  
Z.Y. Li ◽  
Hui Min Huang ◽  
C. Wang
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Carbon Nanofibers ◽  
Ag Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Fabrication And Characterization ◽  
Pan Fibers

The carbon-nanofibers carrying Ag nanoparticles (Ag/CNF) have been successfully obtained via electrospinning followed by calcination. For it, AgNO3/polyacrylonitrile (PAN) fibers were firstly prepared as an intermediate and then the intermediate was calcined at 600°C for 4h to transit the PAN nanofibers to the CNF and reduce AgNO3 to the Ag nanoparticles. Transmission electron microscope (TEM), Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) were used to characterize their morphologies and structures. The results show that the diameters of the Ag nanoparticles and CNF are 5 nm and 180 nm on the average, respectively. Most of the Ag nanoparticles were located on the surface of carbon nanofibers.

Synthesis of Uniform and High Density Silver Nanoparticles by using Peltophorum pterocarpum flower Extract

2014 ◽  
Vol 1584 ◽  
Author(s):  
Matheswaran BALAMURUGAN ◽  
Shanmugam SARAVANAN ◽  
Naoki OHTANI
Keyword(s):  
Silver Nanoparticles ◽  
Fourier Transform ◽  
Electron Microscope ◽  
Ultra Violet ◽  
Capping Agent ◽  
Nanosized Particles ◽  
Flower Extract ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Ft Ir

ABSTRACTSilver nanoparticle (AgNP) is one of the elegant material because its uses in various fields. In this study, AgNPs have been prepared by using Peltophorum pterocarpum (PP) flower extract as reducing and capping agent and aqueous silver nitrate (aq.AgNO3) as silver precursor. The synthesized nanoparticles were characterized using Ultra Violet - Visible (UV-Vis) spectroscopy, High Resolution Transmission Electron Microscope (HR-TEM) and Fourier Transform Infrared Spectroscopy (FT-IR), which reveals the formation of nanosized particles. The UV-Vis spectrum shows an absorption peak around 430nm. HR-TEM images of AgNPs with clear morphology and well dispersed prepared AgNPs.

Characterization of Well-Dispersed CeO2 Nanoparticles Prepared by a New Method of Reverse Microemulsion

2011 ◽  
Vol 194-196 ◽  
pp. 781-784
Author(s):  
Fa Mei Feng ◽  
Jia Qing Xie ◽  
Li Ke Zou ◽  
Bin Xie
Keyword(s):  
Particle Size ◽  
Fourier Transform ◽  
Ceo2 Nanoparticles ◽  
Size Distributions ◽  
X Ray ◽  
Transmission Electron ◽  
Particle Size Analyzer ◽  
Ft Ir ◽  
Cubic Structure

Well-dispersed CeO2 nanoparticles were successfully prepared in a simple system composed of sodium bis (2-ethylhexyl) sulfosuccinate (AOT)- octane-water (W/O) microemulsion in this paper. The morphology and microstructure of the products were characterized by the laser particle size analyzer, Fourier transform infrared spectroscopy (FT-IR), X-ray diffractometer (XRD), differential scanning calorimeter (DSC) and transmission electron microscope (TEM). It was found that the CeO2nanoparticles obtained from this method have well-proportioned size distributions; the surfactant (AOT) molecule was adsorbed on the surface of CeO2nanoparticles precursor, which is favorable for the dispersion of CeO2nanoparticles; the CeO2nanoparticles calcined was a crystal of the cubic structure. In addition, the mechanism on the formation of the CeO2nanoparticles was also proposed in this paper.

scholarly journals Fabrication and characterization of ferrites (Mg and Mn) based on FTIR, XRD, SEM and TEM

2014 ◽  
Vol 8 (3) ◽  
Author(s):  
Tang Ing Hua ◽  
Rita Sundari
Keyword(s):  
Electron Microscope ◽  
Volume Expansion ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Semiconducting Materials ◽  
Thermal Agitation ◽  
X Ray ◽  
Transmission Electron ◽  
Fabrication And Characterization

This study has encountered with the fabrication of ferrites (Mg and Mn) using citric acid as anionic surfactant in sol-gel method followed by calcinations at varied temperatures (300, 600, 800°C) for 2h, respectively. The fabricated ferrites have been characterized by FTIR (Fourier Transform Infrared Spectroscopy), XRD (X-Ray Diffraction), SEM (Scanning Electron Microscope) and TEM (Transmission Electron Microscope). The FTIR spectrum for MnFeO3 shows that some functional groups already removed under 300°C calcination due to several oxidation numbers possessed by Mn leading to more flexibility. The XRD diffractograms for both MgFe2O4 and MnFeO3 show that the transition phase from amorphous to crystalline structure occurred in the temperature range of 300-600°C. The SEM mappings based on the Fe distribution for both MgFe2O4 and MnFeO3 show that more Fe distributed over the ferrites surface at 600 and 800°C, while the SEM mappings for both ferrites (Mg and Mn) show less Fe distribution at 300°C calcination, thus, it indicates more repulsion force bearing by higher amounts of Fe atoms at higher thermal agitation due to volume expansion. The TEM spectra proved that both ferrites existed as crystals after calcined at 600°C. The fabricated ferrites have remarkable electrical properties useful for the manufacture of semiconducting materials.

Synthesis and Characterization of ZnO Nanoparticles in the Method of Precipitation

2011 ◽  
Vol 474-476 ◽  
pp. 1725-1729 ◽  
Author(s):  
Li Qin Wang ◽  
Xiang Ni Yang ◽  
Yang Han ◽  
Rui Jun Zhang ◽  
Yu Lin Yang
Keyword(s):  
Aqueous Solution ◽  
Methyl Orange ◽  
Zno Nanoparticles ◽  
Crystal Form ◽  
Hexagonal Crystal ◽  
Transmission Electron ◽  
Ft Ir ◽  
The Fourier Transform ◽  
Spherical Crystals

ZnO nanoparticles were synthesized in the method of precipitation, and they were characterized by the means of the transmission electron microscopy (TEM), the X-ray powder diffraction (XRD), the thermogravimetric analysis and differential thermal analysis (TG-DTA), and the Fourier transform infrared spectroscopy (FT-IR). Also their photocatalytic and degradation performance for the methyl orange aqueous solution were studied. The research results showed as-prepared ZnO nanoparticles were spherical crystals in hexagonal crystal system, and their size distribution was mainly in the range of 20-30 nm. The annealing temperature was about 390 °C, and a few organics remained, which may be helpful for the formation of ZnO particles. They had integrated crystal form, high crystallinity and thermal stability. Moreover, the obtained ZnO nanoparticles had excellent photocatalytic and degradation performance for the methyl orange aqueous solution. When reacted for 3.5 h, the degradation rate of the methyl orange aqueous solution was up to about 97%.

Preparation and Characterization of BN Nanotubes with Controllable Sizes by Template-aided Synthesis

2008 ◽  
Vol 1081 ◽  
Author(s):  
Yuting Wang ◽  
Shiro Shimada ◽  
Hajime Kiyono ◽  
Yasunori Yamamoto
Keyword(s):  
Electron Microscopy ◽  
Photoelectron Spectroscopy ◽  
Porous Alumina ◽  
Transmission Electron ◽  
Different Temperatures ◽  
Naoh Solution ◽  
Ft Ir ◽  
The Fourier Transform ◽  
Bn Nanotubes

ABSTRACTIn this study, an efficient approach to prepare high quality BN nanotubes (BNNTs) was developed. BNNTs with specific sizes were prepared by sublimation of ammonia borane complex (BH3NH3) using two kinds of porous alumina anodic membrane template in two independently temperature controlled furnaces in a glovebox filled with N2. The BNNTs with template were nitrided at different temperatures 1300 ∼ 1700 °C in NH3. The BNNTs of 200 – 300 nm wide°60×°m long, and 70 – 80 nm wide°×40 μm long were finally collected after removal of the template by etching of with 40 wt% NaOH solution. The fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) results confirmed the formation of BN from BH3NH3. Ordered arrays of BNNTs were observed by scanning electron microscopy (SEM), and the microstructure of these BNNTs was investigated by transmission electron microscopy (TEM). It was found that the diameters of the BNNTs can be easily controlled by using templates with different pore sizes. The wall thickness of the nanotubes was increased by increasing the sublimation time or the amount of the starting BH3NH3. The crystallinity of BNNTs was improved at higher temperatures (1700 °C) in NH3.

Development of Biogenic Silver Nanoparticle Using Rosa Chinensis Flower Extract and Its Antibacterial Property

2016 ◽  
Vol 16 (4) ◽  
pp. 3969-3972 ◽  
Author(s):  
Yongde Meng ◽  
Yanjie Sun
Keyword(s):  
Silver Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Rosa Chinensis ◽  
Flower Extract ◽  
Transmission Electron ◽  
Ft Ir ◽  
Ir Analysis ◽  
The Fourier Transform

In the present study, biosynthesis of silver nanoparticles was carried out using Rosa chinensis flower extract as reducing agent. The characterization of silver nanoparticles was done by UV-VIS spectrum. The morphology and size of silver nanoparticles were determined by transmission electron microscope (TEM) image. The crystallization of silver nanoparticles was confirmed by X-ray diffraction (XRD) measurements. The Fourier transform infrared (FT-IR) analysis was used to confirm the possible involvement in the formation and stabilization of synthesized silver nanoparticles by the extract of Rosa chinensis flower. Antibacterial activity of silver nanoparticles was studied against Gram positive Staphycoccus aureus and Gram negative Escherichia coli.

Preparation and Characterization of PP-g -GMS -St For PP/O-MMT Composite Materials

2011 ◽  
Vol 239-242 ◽  
pp. 1143-1148
Author(s):  
Shao Hui Wang ◽  
Shao Ming Yang
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Impact Strength ◽  
Functional Group ◽  
Nanocomposite Materials ◽  
X Ray Diffraction ◽  
Glyceryl Monostearate ◽  
X Ray ◽  
Transmission Electron

A new compatibilizer with polypropylene as matrix, Glyceryl monostearate (GMS) and styrene(St) as functional group was prepared, and its effect on the properties of polypropylene(PP)/montmorillonite(MMT) nanocomposites was investigated. Fourier transform infrared spectroscopy results showed that the GMS and St monomers had successfully been grafted on the backbone of PP. The characterization results of X-ray diffraction(XRD) pointed out the crystallite size perpendicular to the crystal plane in PP/ compatibilizer / MMT nanocomposites was smaller than that of PP. Through detecting of transmission electron microscope(TEM), it can be found that the new compatibilizer will improve the dispersibility of MMT in PP matrix. At last, the mechanic properties of PP/MMT nanocomposite materials get determination, the mechanical strength especially impact strength had a obvious progress when O-MMT was added, and its maximal value impact strength appears in the 3% montmorillonite and 20% compatibilizer.

Peparation of 20 wt.% Pt0.5Pd0.5/C Nanoelectrocatalysts by Electroless and their Electrocatalytic Properties

2017 ◽  
Vol 727 ◽  
pp. 764-769
Author(s):  
Bing Jie Jin ◽  
Yu Hui Zhang ◽  
Ke Pan Gao ◽  
Cheng Yan Wang
Keyword(s):  
Cyclic Voltammetry ◽  
Electron Microscope ◽  
Agitation Rate ◽  
Effect Factors ◽  
Experimental Conditions ◽  
Electrocatalytic Properties ◽  
Transmission Electron ◽  
Main Effect ◽  
Palladium Content

This work presents investigations on preparation of 20 wt. % Pt0.5Pd0.5/C nanoelectrocatalysts by electroless and their electrocatalytic properties. The 20 wt. % Pt0.5Pd0.5/C nanoelectrocatalysts were prepared by electroless successfully. The optimum experimental conditions of the main effect factors in preparing the PtPd nanoelectrocatalysts are [Pt2+ or Pd2+] =2-10g/L, [HCHO] =10-20g/L, temperature: 40-60°C, the dosage of protection reagent: 1-3 % of the platinum and palladium content, the agitation rate 400-500r/min. The characterization of 20 wt. % Pt0.5Pd0.5/C was performed with cyclic voltammetry (CV) and transmission electron microscope (TEM), respectively. Particles of PtPd are distributed symmetrically on C by TEM, of which are very small and the average granularity is less than 3nm. The nanoelectrocatalysts have high stabilization and lots of catalysis nuclei through CV.

An Electron Microscope Study of Interdiffusion and Compound Formation in Ta-Au Thin Films

1973 ◽  
Vol 31 ◽  
pp. 32-33 ◽  
Author(s):  
T. C. Tisone ◽  
S. Lau
Keyword(s):  
Electron Microscope ◽  
Electron Microscope Study ◽  
Thermally Grown Oxide ◽  
Ion Milling ◽  
Compound Formation ◽  
Technology Application ◽  
Transmission Electron ◽  
Before And After ◽  
Au Thin Films

In a study of the properties of a Ta-Au metallization system for thin film technology application, the interdiffusion between Ta(bcc)-Au, βTa-Au and Ta2M-Au films was studied. Considered here is a discussion of the use of the transmission electron microscope(TEM) in the identification of phases formed and characterization of the film microstructures before and after annealing.The films were deposited by sputtering onto silicon wafers with 5000 Å of thermally grown oxide. The film thicknesses were 2000 Å of Ta and 2000 Å of Au. Samples for TEM observation were prepared by ultrasonically cutting 3mm disks from the wafers. The disks were first chemically etched from the silicon side using a HNO3 :HF(19:5) solution followed by ion milling to perforation of the Au side.

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