scholarly journals Microwave-assisted synthesis of SnO2 nanorods for oxygen gas sensing at room temperature

2013 ◽  
pp. 3875 ◽  
Author(s):  
Ameer Azam ◽  
Sami Habib ◽  
Numan Salah ◽  
Faheem Ahmed
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Microwave Assisted Synthesis ◽  
Sno2 Nanorods ◽  
Microwave Assisted ◽  
Oxygen Gas

Assessment of Magnetic Properties between Fe and Ni Doped ZnO Nanoparticles Synthesized by Microwave Assisted Synthesis Method

2021 ◽  
Vol 317 ◽  
pp. 119-124
Author(s):  
Sabiu Said Abdullahi ◽  
Garba Shehu Musa Galadanci ◽  
Norlaily Mohd Saiden ◽  
Josephine Ying Chyi Liew
Keyword(s):  
Magnetic Properties ◽  
Zno Nanoparticles ◽  
Room Temperature ◽  
Synthesis Method ◽  
Dilute Magnetic Semiconductors ◽  
High Coercivity ◽  
Microwave Assisted Synthesis ◽  
Ferromagnetic Behavior ◽  
Microwave Assisted ◽  
Doped Zno

The emergence of Dilute Magnetic Semiconductors (DMS) with a potentials for spintronic application have attracted much researches attention, special consideration has been given to ZnO semiconductor material due to its wide band gap of 3.37 eV, large exciting binding energy of 60 meV, moreover, its ferromagnetic behavior at room temperature when doped with transition metals. MxZn1-xO (M = Fe or Ni) nanoparticles were synthesized by microwave assisted synthesis method calcined at 600°C. The structural, morphological and magnetic properties of these nanoparticles were studied using X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM) and Vibrating Sample Magnetometer (VSM) respectively. Single phase Wurtzite hexagonal crystal structure was observed for the undoped and Fe doped ZnO nanoparticles with no any impurity, whereas Ni doped ZnO nanoparticles shows the formation of NiO impurities. The magnetic measurement reveals a diamagnetic behavior for the undoped ZnO meanwhile a clear room temperature ferromagnetism was observed for both Fe and Ni doped ZnO. Fe doped ZnO present a high saturation magnetization compared to Ni doped ZnO. However, Ni doped ZnO present high coercivity. The research was confirmed that Fe doped ZnO material will be good material combination for spintronic applications.

scholarly journals Microwave-assisted synthesis of calcium phosphate nanowhiskers

2004 ◽  
Vol 19 (6) ◽  
pp. 1876-1881 ◽  
Author(s):  
Sahil Jalota ◽  
A. Cuneyt Tas ◽  
Sarit B. Bhaduri
Keyword(s):  
Calcium Phosphate ◽  
Aqueous Solutions ◽  
Tricalcium Phosphate ◽  
Room Temperature ◽  
Single Phase ◽  
Microwave Oven ◽  
Molten Salt Synthesis ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Auto Ignition

Calcium phosphate [single-phase hydroxyapatite (HA), single-phase tricalcium phosphate (TCP), and biphasic HA-TCP] nanowhiskers and/or powders were produced by using a novel microwave-assisted “combustion synthesis (auto ignition)/molten salt synthesis” hybrid route. This work is an example of our “synergistic processing” philosophy combining these three technologies while taking advantage of their useful aspects. Aqueous solutions containing NaNO3, Ca(NO3)2·4H2O and KH2PO4 (with or without urea) were irradiated in a household microwave oven for 5 min at 600 watts of power. The as-synthesized precursors were then simply stirred in water at room temperature for 1 h to obtain the nanowhiskers or powders of the desired calcium phosphate bioceramics.

Microwave-assisted synthesis of fibre-like Mg(OH)2 nanoparticles in aqueous solution at room temperature

2004 ◽  
Vol 58 (16) ◽  
pp. 2166-2169 ◽  
Author(s):  
Huaqiang Wu ◽  
Mingwang Shao ◽  
Jiashan Gu ◽  
Xianwen Wei
Keyword(s):  
Aqueous Solution ◽  
Room Temperature ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted

Facile Microwave-Assisted Synthesis and Magnetic and Gas Sensing Properties of Fe3O4 Nanoroses

2010 ◽  
Vol 114 (14) ◽  
pp. 6237-6242 ◽  
Author(s):  
Zhihui Ai ◽  
Kejian Deng ◽  
Qianfen Wan ◽  
Lizhi Zhang ◽  
Shuncheng Lee
Keyword(s):  
Gas Sensing ◽  
Microwave Assisted Synthesis ◽  
Sensing Properties ◽  
Microwave Assisted ◽  
Gas Sensing Properties

Room temperature ferromagnetism in undoped and Fe doped ZnO nanorods: Microwave-assisted synthesis

2011 ◽  
Vol 184 (2) ◽  
pp. 391-400 ◽  
Author(s):  
Mukta V. Limaye ◽  
Shashi B. Singh ◽  
Raja Das ◽  
Pankaj Poddar ◽  
Sulabha K. Kulkarni
Keyword(s):  
Room Temperature ◽  
Room Temperature Ferromagnetism ◽  
Zno Nanorods ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Doped Zno

scholarly journals Optimization of the catalytic performance of Pd/Fe3O4 nanoparticles prepared via microwave-assisted synthesis for pharmaceutical and catalysis applications

2019 ◽  
Vol 9 (1) ◽  
pp. 3794-3799 ◽  
Keyword(s):  
Carbon Monoxide ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Room Temperature ◽  
Catalytic Performance ◽  
Oxidation Catalysis ◽  
Microwave Assisted Synthesis ◽  
Oxide Nanoparticles ◽  
X Ray ◽  
Microwave Assisted

Microwave assisted synthesis technique was used to prepare palladium supported on iron oxide nanoparticles. The advantage of using microwave irradiation as a synthetic tool is due to its unique features as a one step, simple, versatile, and rapid process. The reactants are added simply at room temperature without using high-temperature injection. Hydrazine hydrate was added by the following ratios (0.1, 0.2, 0.3, 0.4, 0.6, 0.8, 1, 1.6, and 3) ml to the different prepared samples at room temperature in order to investigate its effect on the catalytic performance of the prepared catalysts. The prepared catalyst could be used as an ideal candidate not only for Pharmaceutical industry through cross-coupling reactions but also for low temperature oxidation catalysis of carbon monoxide and pharmaceutical applications as well. The experimental results showed that Pd/Fe3O4 catalyst has a remarkable catalytic activity for carbon monoxide oxidation catalysis due to the strong interaction between palladium and iron oxide nanoparticles. This may be due to the small particle size (7-14 nm) and concentration ratio of the Pd nanoparticles dispersed on the surface of magnetite (Fe3O4). Those nanoparticles were characterized by various spectroscopic techniques including; X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Vibrating Sample Magnetometer (VSM) and transmission electron microscopy (TEM).

Alcohol Sensing Properties of SnO2/CNT Nanocomposites Synthesized by Microwave-Assisted Process

2016 ◽  
Vol 675-676 ◽  
pp. 85-88
Author(s):  
Nalita Sawangjit ◽  
Wicharn Techitdheera ◽  
Wisanu Pecharapa
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Structural Morphology ◽  
X Ray ◽  
Multi Wall Carbon Nanotubes ◽  
Microwave Assisted ◽  
Sensing Sensitivity ◽  
Scanning Electron

SnO2/CNT nanocomposites were synthesized via microwave-assisted process using SnCl4·5H2O as a starting precursor and UV-treated multi-wall carbon nanotubes (MWCNTs) as scaffolds. The concentration of SnCl4 was varied in the range of 0.01-0.05 M. Effect of precursor concentration on their physical properties and micro structural morphology were investigated by X-ray diffraction (XRD) and scanning electron microscope (SEM). XRD results indicate that the as-synthesized composites are the mixture of two separated phases including SnO2 and MWCNT. SEM images indicate that the surfaces of MWCNT are thoroughly covered with SnO2 nanoparticles. Comparative gas sensing result reveals that the prepared hybrid SnO2/MWCNT composites exhibit much higher sensing sensitivity and recovery property in detecting alcohol gas at room temperature than the bare SnO2.

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