Characterization of well faceted palladium nanoparticles supported on alumina by transmission electron microscopy and FT-IR spectroscopy of CO adsorption

2009 ◽  
Vol 352 (1-2) ◽  
pp. 50-60 ◽  
Author(s):  
F. Di Gregorio ◽  
L. Bisson ◽  
T. Armaroli ◽  
C. Verdon ◽  
L. Lemaitre ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ir Spectroscopy ◽  
Palladium Nanoparticles ◽  
Co Adsorption ◽  
Transmission Electron ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Synthesis of Fe 3+-Dopped PANI Conductive Nanomaterials via Interfacial Polymerization

2011 ◽  
Vol 239-242 ◽  
pp. 2839-2842
Author(s):  
Hong Mei Mu ◽  
Peng Fei ◽  
Bi Tao Su ◽  
Zi Qiang Lei
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
Ir Spectroscopy ◽  
Interfacial Polymerization ◽  
X Ray ◽  
Transmission Electron ◽  
Ft Ir ◽  
Conductive Nanomaterials ◽  
Ft Ir Spectroscopy

A series of Fe3+-dopped polyaniline (Fe3+/PANI) nanomaterials with different morphologies and a higher conductivity were successfully synthesized using a simple and static interfacial polymerization by using FeCl3 as both oxidant catalyst and dopant. The effect of surfactants CTAB and SDS and the concentration of FeCl3 on the morphology and conductivity of Fe3+/PANI nanomaterial were investigated. The samples were characterized by Transmission Electron Microscopy (TEM), SDY-4 probes conductivity meter, X-ray Diffractometry (XRD), Energy dispersive spectroscopy (EDS) and Fourier transform infrared (FT-IR) spectroscopy techniques. TEM’s results showed that their morphologies changed with the type of the surfactant and the concentration of FeCl3. Introducing surfactants CTAB and SDS into Fe3+/PANI remarkably improved the conductivity of the material. The conductivities of CTAB/Fe3+/PANI and SDS /Fe3+/PANI nanomaterials were respectively about 4.8×10-2 and 1.3×10-2 S/cm while the conductivity of Fe3+/PANI was found to be 1.5×10-4 S/cm. The different morphology and high conductivity may be ascribed to the mutual effects of the surfactant and oxidant.

scholarly journals An Efficient and Novel Ammonia Sensor Based on Polypyrrole/Tin Oxide/MWCNT Nanocomposite

2020 ◽  
Vol 32 (6) ◽  
pp. 1505-1510
Author(s):  
Ahmad Husain ◽  
Mohd Urooj Shariq ◽  
Anees Ahmad
Keyword(s):  
Electron Microscopy ◽  
Tin Oxide ◽  
Charge Carriers ◽  
Morphological Properties ◽  
X Ray Diffraction ◽  
Ammonia Sensing ◽  
Transmission Electron ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

In present study, the synthesis and characterization of a novel polypyrrole (PPy)/tin oxide (SnO2)/MWCNT nanocomposite along with pristine polypyrrole is reported. These materials have been studied for their structural and morphological properties by FT-IR spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. PPy/SnO2/MWCNT nanocomposite has been converted into a pellet-shaped sensor, and its ammonia sensing studies were carried out by calculating the variation in the DC electrical conductivity at different concentration of ammonia ranging from 10 to 1500 ppm. The sensing response of the sensor was determined at 1500, 1000, 500, 200, 100 and 10 ppm and found to be 70.4, 66.1, 62.2, 55.4, 50.8 and 39.7%, respectively The sensor showed a complete reversibility at lower concentrations along with excellent selectivity and stability. Finally, a sensing mechanism was also proposed involving polarons (charge carriers) of polypyrrole and lone pairs of ammonia molecules

Characterization of banana peel by scanning electron microscopy and FT-IR spectroscopy and its use for cadmium removal

2008 ◽  
Vol 66 (2) ◽  
pp. 260-265 ◽  
Author(s):  
Jamil R. Memon ◽  
Saima Q. Memon ◽  
M.I. Bhanger ◽  
G. Zuhra Memon ◽  
A. El-Turki ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Ir Spectroscopy ◽  
Banana Peel ◽  
Cadmium Removal ◽  
Ft Ir ◽  
Scanning Electron ◽  
Ft Ir Spectroscopy

Synthesis and Characterization of HgSe Nanostructure Using a Novel Precursor

2013 ◽  
Vol 32 (2) ◽  
pp. 157-162 ◽  
Author(s):  
Mahdiyeh Esmaeili-Zare ◽  
Masoud Salavati-Niasari ◽  
Davood Ghanbari
Keyword(s):  
Electron Microscopy ◽  
Synthesis And Characterization ◽  
Sonochemical Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Mercury Selenide ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

AbstractMercury selenide nanostructures were synthesized from the reaction of N, N′-bis(salicylidene)propane-1,3-diamine mercury complex, (Hg(Salpn)) as a novel precursor, via sonochemical method. The effect of different surfactant on the morphology and particle size of the products was investigated. Products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy and X-ray energy dispersive spectroscopy (EDS).

Synthesis and Electrochemical Characterization of Nano-Graphite Oxide for Enzyme Free Detection of Cholesterol

2015 ◽  
Vol 1786 ◽  
pp. 57-63
Author(s):  
Vasuda Bhatia ◽  
Bhawana Singh ◽  
Vinod K. Jain
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Graphite Oxide ◽  
Linear Response ◽  
X Ray Diffraction ◽  
X Ray ◽  
Embedding Technique ◽  
Transmission Electron ◽  
Ft Ir

ABSTRACTNano-graphite oxide has been synthesized from graphite flakes using modified Hummer’s method. Fourier transform infrared (FT-IR) data, x-ray diffraction (XRD) and transmission electron microscopy (TEM) revealed functionalization of the synthesised nano-graphitic platelets with oxygenated bonds. Using thermal embedding technique for the fabrication of self-assembled films, electrodes of nano-graphite oxide have been fabricated for enzyme free detection of cholesterol electrochemically. The electrodes provided a linear response for the enzyme less detection in the range of 50mg/dl to 500mg/dl with a correlation coefficient, R, of 0.99784 and sensitivity of 1.0587 µA/mg.

scholarly journals Preparation and characterization of highly blue emitting fluorescent carbon nano-dots using Pongammia pinnata fresh leaves

2021 ◽  
Author(s):  
Govindaraju K ◽  
K. Vijai Anand ◽  
S. Muthamilselvan ◽  
M. Kannan ◽  
M. Elanchezhiyan
Keyword(s):  
Electron Microscopy ◽  
Water Soluble ◽  
Hydrothermal Technique ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Average Size ◽  
Soluble Carbon ◽  
Ft Ir Spectroscopy

Abstract In this study, a simple environmental benign approach have been adopted for the preparation of highly luminescent (blue emitting) water soluble carbon nano-dots using Pongammia pinnata (Pp) leaves via hydrothermal technique. The prepared Pp-carbon nano- dots were characterized using UV-vis spectroscopy, fluorescence spectroscopy, Fourier transform infrared (FT-IR) spectroscopy, transmission electron microscopy (TEM) and dynamic light scattering (DLS) measurements. The Pp-carbon nano-dots are spherical in shape with an average size of 32 nm.

scholarly journals Characterization of the Spindle Morphology Nanomicelles Assembled from Sericin and Gelatin

2017 ◽  
Vol 2017 ◽  
pp. 1-9
Author(s):  
Xiaozhou Su ◽  
Lei Li ◽  
Weihan Huang
Keyword(s):  
Electron Microscopy ◽  
Protein Concentration ◽  
Scanning Calorimetry ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron ◽  
Ft Ir ◽  
And Storage ◽  
Ft Ir Spectroscopy

Complex nanomicelles were prepared by sericin and type A gelatin with molecular weight of 5789 Da and 128664 Da separately. The assembling conditions were as follows: mass ratio (sericin/gelatin) was 1 : 1, protein concentration was 0.5%, temperature was 35°C, and assembling time was 18 hours. Scanning electron microscopy (SEM), atomic force microscopy (AFM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, differential scanning calorimetry (DSC), and dynamic light scattering (DLS) were conducted to observe and characterize the complex nanomicelles. Results showed that the complex sericin/gelatin micelles was a kind of nanospindle micelles. The micelles had high electrochemical stability, thermal stability, antidilution stability, and storage stability.

scholarly journals Comparative Study of Chitosan and Oligochitosan Coatings on Mucoadhesion of Curcumin Nanosuspensions

Pharmaceutics ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 2154
Author(s):  
Gye Hwa Shin ◽  
Jun Tae Kim
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Particle Size ◽  
Morphological Changes ◽  
Transmission Electron ◽  
Efficient Delivery ◽  
Ft Ir ◽  
The Mean ◽  
Insoluble Compounds ◽  
Ft Ir Spectroscopy

Curcumin nanosuspensions (Cur-NSs), chitosan-coated Cur-NSs (CS-Cur-NSs), and oligochitosan-coated Cur-NSs (OCS-Cur-NSs) were prepared by using an ultrasonic homogenization technique. The mean particle size of Cur-NSs was 210.9 nm and significantly (p < 0.05) increased to 368.8 nm by CS coating and decreased to 172.8 nm by OCS coating. Encapsulation efficiencies of Cur-NSs, CS-Cur-NSs, and OCS-Cur-NSs were 80.6%, 91.4%, and 88.5%, respectively. The mucin adsorption of Cur-NSs was steeply increased about 3–4 times by CS and OCS coating. Morphological changes of these NSs were studied using circular dichroism spectroscopy, Fourier-transform infrared (FT-IR) spectroscopy, and transmission electron microscopy (TEM). Thus, CS-Cur-NSs and OCS-Cur-NSs showed great potential as mucoadhesive nano-carriers for the efficient delivery of water insoluble compounds like curcumin to the gastrointestinal system.

scholarly journals Synthesis, Characterization and Ammonia Sensing Studies on Novel Polypyrrole/Zinc Oxide/SWCNT Nanocomposite

2020 ◽  
Vol 32 (8) ◽  
pp. 1961-1966
Author(s):  
Ahmad Husain ◽  
Mohd Urooj Shariq ◽  
Sharique Ahmad ◽  
Anees Ahmad ◽  
Faiz Mohammad
Keyword(s):  
Electron Microscopy ◽  
Zinc Oxide ◽  
Charge Carriers ◽  
X Ray Diffraction ◽  
Ammonia Sensing ◽  
Transmission Electron ◽  
Ft Ir ◽  
Very High ◽  
Ft Ir Spectroscopy

Herein, the synthesis and characterization of a novel polypyrrole (PPy)/zinc oxide (ZnO)/SWCNT nanocomposite together with pristine polypyrrole is reported. These as-prepared materials have been characterized by FT-IR spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA) techniques. The PPy/ ZnO/SWCNT nanocomposite is used as a pellet-shaped ammonia sensor. The sensing response is calculated in terms of variation in the DC electrical conductivity at different concentration of ammonia ranging from 50 ppm to 2000 ppm. The sensing response of the sensor is determined at 2000, 1000, 500, 400, 300, 200, 100 and 50 ppm and found to be 76.3, 60.5, 54.8, 52.6, 50.2, 48.5, 40.5 and 36.6%, respectively The sensor displays excellent reversibility along with very high selectivity and stability. Finally, a sensing mechanism is also proposed involving polarons (charge carriers) of polypyrrole and lone pairs of electrons of ammonia molecules.

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