scholarly journals Manganese Deposition Content in Carbon Nanotubes Based Filters: Energy Dispersive X-ray and Rutherford Backscatter Spectrometry Investigations

2021 ◽  
pp. 108-116
Author(s):  
Emad M. Elsehly
Keyword(s):  
Carbon Nanotubes ◽  
Manganese Content ◽  
Energy Dispersive ◽  
Rutherford Backscatter Spectrometry ◽  
Manganese Concentration ◽  
Diameter Distribution ◽  
Ambient Conditions ◽  
Solution Ph ◽  
X Ray ◽  
Functionalized Mwcnts

Carbon nanotubes (CNTs) based filters have a prospective advantage compared to the commercial filters due to their lightweight and ability to work without electricity or heat. The manganese (Mn) removal from aqueous solutions by oxidized multi-walled carbon nanotubes (O-MWCNTs) was investigated. The filtration performance was studied under ambient conditions: the solution pH, the initial manganese concentration, and the MWCNT-filter mass. The samples of MWCNT-filters were investigated using energy dispersive X-ray spectroscopy (EDS) and rutherford backscatter spectrometry (RBS) to account for the manganese content within the MWCNT-filter. These techniques were conducted to study the oxidation effect on the morphology of MWCNTs and evaluate the oxygen functional groups and the average diameter distribution. Based on these examinations, the competence of Mn removal may exceed 91% for 50 ppm initial concentration of Mn, proposing that functionalized MWCNTs is a promising filter. The Mn removal was achieved at low pH with removal enhancement at the pH of 2. Functionalized MWCNTs based filters are promising candidate for heavy metal ions removal from industrial wastewater.

Modification of Multilayer Carbon Nanotubes for the Removal of Arsenate

2016 ◽  
Vol 16 (4) ◽  
pp. 3835-3840
Author(s):  
Libing Liao ◽  
Gin-Lung Liu ◽  
Jiin-Shuh Jean ◽  
Wei-Teh Jiang ◽  
Zhaohui Li
Keyword(s):  
Carbon Nanotubes ◽  
Contact Time ◽  
Carbon Adsorbent ◽  
Superior Performance ◽  
Solution Ph ◽  
Nano Composite ◽  
X Ray ◽  
Multilayer Carbon Nanotubes ◽  
Removal Of Arsenic ◽  
Composite Carbon

The aim of this study was to explore a new nano-composite carbon adsorbent material for the removal of arsenic from water. The multilayer carbon nanotubes (MCNTs) were treated with different acids and/or modified with iron to create more surface COOH sites or Fe-impregnated MCNTs for the enhanced uptake of As(V). Tests were conducted as a function of initial As(V) concentrations, contact time, and solution pH. The coverage of ferric hydroxides on MCNTs and the uptake of As on Fe-MCNTs were independently confirmed by field emission scanning electron microscope and energy dispersive X-ray spectroscopy analyses. With an As(V) uptake capacities of 27 mg/g on Fe-MCNTs and 14 mg/g on acid-MCNTs, the material showed superior performance for As(V) removal.

Nonuniform functional group distribution of carbon nanotubes studied by energy dispersive X-ray spectrometry imaging in SEM

Nanoscale ◽  
2019 ◽  
Vol 11 (44) ◽  
pp. 21487-21492 ◽  
Author(s):  
Hideaki Nakajima ◽  
Takahiro Morimoto ◽  
Ying Zhou ◽  
Kazufumi Kobashi ◽  
Seisuke Ata ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Spatial Resolution ◽  
Functional Group ◽  
High Spatial Resolution ◽  
Energy Dispersive ◽  
Elemental Mapping ◽  
X Ray ◽  
Group Distribution

Light elemental mapping with a high spatial resolution of <10 nm is successfully conducted by the advanced SEM–EDS technique.

scholarly journals Chemical Synthesis, Functionalization and Characterization of Multiwalled Carbon Nanotubes

2020 ◽  
Vol 6 (3) ◽  
pp. 905-907
Author(s):  
S.S. Gautam ◽  
G.P. Satsangi ◽  
V.R. Satsangi
Keyword(s):  
Carbon Nanotubes ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Functionalized Mwcnts

This research work is attempted to synthesize, functionalize and to characterize multi walled carbon nanotubes (MWCNTs). The synthesis of multi walled carbon nanotubes was done by chemical vapor deposition (CVD) method. The characterization of MWCNTs was done by adopting the following techniques such as field emission scanning electron microscope, X-ray diffraction, Fourier-transform infrared spectroscopy. The crystalline quality of MWCNTs was confirmed from the analysis of X-ray diffraction pattern. FE-SEM image obtained for MWCNTs and functionalized MWCNTs and it has been seen that dimeter of most of the MWCNTs lies around 90 nm, where as, functionalized MWCNTs diameter is smaller i.e., around 35 nm only. Fourier-transform infrared spectroscopy study confirmed the presence of –COOH and H- bonded –OH in functionalized MWCNTs.

scholarly journals Pemurnian Carbon Nanotubes menggunakan Larutan HNO3 dengan metode Pencucian Biasa dan Reflux (Halaman 1 s.d. 4)

2014 ◽  
Vol 17 (49) ◽  
Author(s):  
Agus Subagio ◽  
Pardoyo ◽  
Priyono ◽  
Rike Yudianti ◽  
Khasan Rowi ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Scanning Electron Microscopy ◽  
Carbon Nanotube ◽  
Energy Dispersive ◽  
X Ray ◽  
Scanning Electron

Telah dilakukan penelitian berkaitan pemurnian carbon nanotubes (CNT) dengan metode pencucian biasa dan reflux menggunakan larutan HNO3. Pemurnian menggunakan metode pencucian biasa dilakukan dengan memasukkan CNT ke dalam 25 ml larutan HNO3 dengan variasi konsentrasi 25, 45 dan 65% di dalam gelas beker. Selanjutnya dilakukan pengadukan dan didiamkan selama 30 menit. Hasil pencucian disaring dengan kertas saring dan residunya dikeringkan di dalam oven dengan temperatur 120oC selama 1 jam. Sedangkan metode reflux dilakukan pada temperatur 100oC selama 4 jam menggunakan larutan HNO3 dengan variasi konsentrasi 25, 45 dan 65%. CNT hasil pemurnian selanjutnya dikeringkan di dalam oven dengan temperatur 120°C selama semalam. Carbon nanotube sebelum dan sesudah pemurnian dianalisis menggunakan Scanning Electron Microscopy (SEM) dan Energy Dispersive X-Ray Spectroscopy (EDS). Hasil penelitian menunjukkan bahwa tingkat kemurnian CNT yang paling baik dengan menggunakan metode pencucian reflux pada konsentrasi HNO3 sebesar 65%.  

Rapid Analysis of Mn Plain Carbon Steels by Nondispersive X-Ray Fluorescence Spectroscopy

1971 ◽  
Vol 15 ◽  
pp. 276-284
Author(s):  
R. J. Gehrke ◽  
M. S. Cole ◽  
W. A. Ryder
Keyword(s):  
Fluorescence Spectroscopy ◽  
Steel Industry ◽  
Manganese Content ◽  
Rapid Analysis ◽  
Carbon Steels ◽  
Manganese Concentration ◽  
X Ray ◽  
On Line ◽  
Steel Ingots ◽  
Fluorescence Spectrometer

Plain carbon steels are primarily composed of iron (~97%), but generally have small quantities of carbon, manganese, sulfur, phosphorous and silicon also present. Lead or copper may also be present. The steel industry is in need of an on-line technique of analysis for manganese in these steels. The manganese concentration of these steels varies from 0.3 to 1.5%. A technique is presented for the rapid analysis of manganese in carbon steels using energy dispersive x-ray fluorescence spectroscopy. It is capable of determining the manganese content of a carbon steel in. less than 30 sec with an uncertainty of less than 0.05% manganese. Because this method can analyze a steel from a distance of two feet, it should be possible to adequately protect the x-ray fluorescence spectrometer from the environment even when analyses are made of hot steel ingots at temperatures ranging up to 2400°F.

Microanalysis of precipitates in a ferritic steel

1978 ◽  
Vol 36 (1) ◽  
pp. 618-619
Author(s):  
J.M. Titchmarsh
Keyword(s):  
Ferritic Steel ◽  
Particle Identification ◽  
Energy Dispersive ◽  
Objective Lens ◽  
Ferritic Steels ◽  
Replica Technique ◽  
X Ray ◽  
Large Numbers ◽  
Scanning Transmission ◽  
Made In

The advances in recent years in the microanalytical capabilities of conventional TEM's fitted with probe forming lenses allow much more detailed investigations to be made of the microstructures of complex alloys, such as ferritic steels, than have been possible previously. In particular, the identification of individual precipitate particles with dimensions of a few tens of nanometers in alloys containing high densities of several chemically and crystallographically different precipitate types is feasible. The aim of the investigation described in this paper was to establish a method which allowed individual particle identification to be made in a few seconds so that large numbers of particles could be examined in a few hours.A Philips EM400 microscope, fitted with the scanning transmission (STEM) objective lens pole-pieces and an EDAX energy dispersive X-ray analyser, was used at 120 kV with a thermal W hairpin filament. The precipitates examined were extracted using a standard C replica technique from specimens of a 2¼Cr-lMo ferritic steel in a quenched and tempered condition.

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