ORIGINAL_ARTICLE
Biogenic synthesis of Palladium nanoparticles mediated by Artemisia abrotanum aqueous extract and its catalytic evaluation for Suzuki coupling reactions
A simple and biological method for the fabrication of palladium nanoparticles (Pd NPs) was developed, applying the non-toxic and sustainable natural extract from Artemisia abrotanum as the reducing, stabilizing and capping agent. UV-vis spectroscopy, X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDS), were utilized to classify the synthesized Pd NPs@Artemisia catalyst. The Pd NPs@Artemisia demonstrated excellent behavior as a reusable nanocatalyst in Suzuki-Miyaura cross-coupling reactions at room temperature. The nanocatalyst was recycled 7 times without any significant deduction in catalytic activity.
https://www.ajnanomat.com/article_61699_047a545a03641e59ba1a73c5ad4b9301.pdf
2018-07-01
104
114
10.26655/ajnanomat.2018.6.1
Pd nanoparticles
Artemisia abrotanum
Green synthesis
Suzuki
C-C coupling
Bond formation
Catalyst
Fatemeh
Ahmadi
1
Department of Chemistry, Sciences and Research Branch, Islamic Azad University, Tehran, Iran
AUTHOR
Malak
Hekmati
2
Department of Pharmaceutical Chemistry, Faculty of Pharmaceutical Chemistry, Pharmaceutical Sciences Branch, Islamic Azad University, (IAUPS), Tehran, Iran
AUTHOR
Mohammad
Yousefi
myousefi50@yahoo.com
3
Department of Chemistry, Sciences and Research Branch, Islamic Azad University, Tehran, Iran.
AUTHOR
Hojat
Veisi
hojatveisi@yahoo.com
4
Department of Chemistry, Payame Noor University, PO BOX 19395-4697 Tehran, Iran.
LEAD_AUTHOR
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64
ORIGINAL_ARTICLE
Effect of Aloe vera on synthesis of nano Tin (iv) oxide
Tin (IV) oxide (SnO2) is a compound semiconductor which has been used for gas sensing and fluoride removal. SnO2 was synthesized with tin chloride as a precursor by sol gel method. Aloe vera was added during the preparation of SnO2 to study its effect on the nanosize, composition and morphology. The prepared nanopowders are characterized by XRD, SEM and FTIR to analyze the crystallite size, morphology, functional groups and absorption bands. FTIR reveal the change in functional group and shift in absorbance due to presence of Aloe vera. XRD analysis with Williamson Hall plot confirms the nanosize which was in accordance with the SEM results. PL spectra were recorded to find the effect of band gap and intensity on SnO2 due to aloe vera.
https://www.ajnanomat.com/article_61809_5de55a57b6d1d4fe0d220697bd2affed.pdf
2018-07-01
115
121
10.26655/ajnanomat.2018.6.2
SnO2
Aloe vera
Sol gel
FTIR
Veeriah
Veeraganesh
veeraganeshv@gmail.com
1
Department of Physics, Thiagarajar College of Engineering, Madurai-625015.
AUTHOR
Alagappan
Subramaniyan
alsphy@tce.edu
2
Departments of Mechanical Engineering, Thiagarajar College of Engineering, Madurai-625015
LEAD_AUTHOR
Thambu
Sornakumar
tskmech@tce.edu
3
Department of Physics, Thiagarajar College of Engineering, Madurai-625015.
AUTHOR
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14
ORIGINAL_ARTICLE
Simulation and Characterization of PIN Photodiode for Photonic Applications
Research conducted on silicon based photodetector technology has recently shown rapidly growing momentum to develop the robust silicon based detectors for photonic applications. The thrust is to manufacture low cost and high efficiency detectors with CMOS process compatibility. In this study, a new design and characterization of PIN photodiode is envisaged. The simulation tool, Silvaco TCAD (and its variants), was used to design and simulate the processes of the device. Electrical and optical measurements such as I-V characteristics (dark current), and internal/external quantum efficiencies were analysed to evaluate the designed and processed device structure for its potential applications in photonics and other detection mechanisms.
https://www.ajnanomat.com/article_63013_7c977ea4ae425dba5814b3bedaa804c3.pdf
2018-07-01
122
134
10.26655/ajnanomat.2018.6.3
PIN photodiode
CMOS
I-V characteristics
Quantum efficiency
Waqas
Ahmad
waqas@szu.edu.cn
1
SZU-NUS Collaborative Innovation Centre for Optoelectronic Science & Technology, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, P.R. China
LEAD_AUTHOR
Muhammad Umair
Ali
muhammad.umair@pku.edu.cn
2
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, P. R. China
AUTHOR
Vijay
Laxmi
vijaylaxmigupta90@gmail.com
3
THz Technical Research Center of Shenzhen University, College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, P.R. China
AUTHOR
Ahmed Shuja
Syed
ahmad.shuja@iiu.edu.pk
4
Centre for Advanced Electronics and Photovoltaic Engineering, International Islamic University, Islamabad 44000, Pakistan
AUTHOR
1. Bank SR, Campbell JC, Maddox SJ, Ren M, Rockwell A-K, Woodson ME, March SD (2018) IEEE J. Sel. Top. Quant. Electron 24: 1-7.
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24
ORIGINAL_ARTICLE
One Pot synthesis of 2-substituted benzothiazoles catalyzed by Bi2O3 nanoparticles
A convenient and efficient synthesis of 2-substituted benzothiazole derivatives are carried out by the one-pot reaction of 2-aminothiophenol with various aromatic aldehydes in using Bi2O3 nanoparticles as a catalyst at 60°C. The structure of the synthesized compounds have been confirmed on the basis of by FT-IR, H1 NMR, C13 NMR, Mass spectrometry and elemental analysis. This protocol afforded advantages i.e. purification of products by non-chromatographic method. Bi2O3 nanoparticles is cheap, readily available, versatile, environment friendly and recyclable. The reaction has been carried out in ethanol, thus eliminating hazardous organic solvents.
https://www.ajnanomat.com/article_63467_4660e4b372fdf6cdd03d34509b0dbbf6.pdf
2018-07-01
135
142
10.26655/ajnanomat.2018.6.4
Benzothiazole derivatives
Synthesis
Catalyzed and Nano-particles
Jyoti
Sharma
jyoti311@gmail.com
1
School of studies in chemistry, Jiwaji University, Gwalior (M.P.) India-474011
LEAD_AUTHOR
Ravi
Bansal
ravibansal880@gmail.com
2
School of studies in chemistry, Jiwaji University, Gwalior (M.P.) India-474011
AUTHOR
Pradeep
Soni
pradeepsonij@gmail.com
3
School of studies in chemistry, Jiwaji University, Gwalior (M.P.) India-474011
AUTHOR
Swati
Singh
swatipariha@gmail.com
4
School of studies in chemistry, Jiwaji University, Gwalior (M.P.) India-474011
AUTHOR
Anand
Halve
halveanand@yahoo.co.in
5
School of studies in chemistry, Jiwaji University, Gwalior (M.P.) India-474011
AUTHOR
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ORIGINAL_ARTICLE
Study of molybdenum effect on synthesis behavior of nanocrystalline NiAl intermetallic during mechanical alloying
The mechanical alloying (MA) procedure was used to synthesize the Ni50Al50 and Ni50Al45Mo5 nanocrystalline intermetallic compound using the pure Ni, Al and Mo elemental powders under an argon atmosphere for different times (8, 16, 48, 80 and 128 h) in a planetary ball mill with hardened steel balls (12 balls-1cm and 4 balls-2cm in diameter). The mechanical alloying was carried out in the attendance of various Mo contents as a micro-alloying element for various milling times. Microstructural characterization and structural changes of powder particles during mechanical alloying were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Outcomes confirmed that the synthesis behavior of NiAl intermetallic depends on the milling time and Mo content. The results show that after than 80h milling, the intermetallic phase is produced after opening the vial lid. X-ray map show that, in the fixed milling time, enhancing the Mo content leads to acceleration in the NiAl formation in air atmosphere. The mechanical alloyed powders have a microstructure consisting of nanometer size particles. Mo enhance has a considerable effect on the lowering of crystallite size. The TEM image showed that the Ni50Al45Mo5 nano-particles were less than 10 nm. The average grain size is smaller than those sizes obtained in the NiAl (25 – 35 nm) alloy.
https://www.ajnanomat.com/article_63510_94ea11f66ce3206258af3361285b26a1.pdf
2018-07-01
143
156
10.26655/ajnanomat.2018.6.5
mechanical alloying
nanocrystalline
intermetallic
Ni50Al50
Mo
Ali
Khajesarvi
alikhajesarvi@yahoo.com
1
Department of Mining and Metallurgical Engineering, Yazd University, Safayieh, Daneshgah Blvd, University Main Campus, P.O. Box 89195-741, Yazd, Iran.
LEAD_AUTHOR
Gholamhossein
Akbari
hekmat2manich@yahoo.com
2
Department of Materials Science and Engineering, Shahid Bahonar University, 76135-133, Kerman, Iran.
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