scholarly journals Green Synthesis ZnO Nanoparticles Using Rinds Extract of Sapindus rarak DC

2021 ◽  
Vol 5 (1) ◽  
pp. 198
Author(s):  
Demi Dama Yanti ◽  
Evi Maryanti
Keyword(s):  
Low Temperature ◽  
Green Synthesis ◽  
Zno Nanoparticles ◽  
Room Temperature ◽  
Crystal Size ◽  
Hexagonal Structure ◽  
Capping Agent ◽  
Xrd Pattern ◽  
Average Size ◽  
Brown Powder

The green synthesis of ZnO nanoparticles was carried out using a natural capping agent, Sapindus rarak DC rinds extract at low-temperature calcination and environmentally friendly solvent. The mixture of Zn(CH3COO)2, NaOH, and rinds extract was sonicated for 4 h at room temperature. The calcination was carried out at low temperature, 95oC for 8 h, and resulted in pale brown powder. XRD and SEM were used to confirm the structure and to analyze the morphology of ZnO nanoparticles respectively. XRD pattern of ZnO nanoparticles was corresponding to JDCPS card no 36-1451 with hexagonal structure. The average crystal size of ZnO nanoparticles was calculated using the scherrer equation and the average size was about 35.8 nm. From this study, the extract of the rind of Sapindus rarak DC was found to be a natural capping agent to synthesis ZnO nanoparticles because Sapindus rarak DC contain a pythochemical compound to limit the interaction between crystal seeds.

LOW TEMPERATURE SYNTHESIS OF BaB6 NANOMETER POWDERS

2009 ◽  
Vol 23 (06n07) ◽  
pp. 1553-1558 ◽  
Author(s):  
XIAOHUA ZHAO ◽  
GUANGHUI MIN ◽  
LIN ZHANG ◽  
LIMEI LIANG ◽  
HUASHUN YU
Keyword(s):  
Low Temperature ◽  
Atomic Ratio ◽  
Stoichiometric Ratio ◽  
X Ray Diffraction ◽  
Low Temperature Synthesis ◽  
Xrd Pattern ◽  
Raman Scattering Spectroscopy ◽  
Test Range ◽  
Average Size ◽  
Electron Dispersion

The reaction synthesis of barium boride (BaB6) nanoparticles under low temperature was investigated in this study. X-ray diffraction (XRD) was used to investigate the phase and the structure of BaB 6. The characterization for microstructure was performed by Field Emission Scanning Electron Microscope (FESEM) with EDS, TEM, Fourier transform infrared (FTIR) spectroscopy and Raman scattering spectroscopy. It is concluded that BaB 6 nanoparticles can be successfully prepared under low temperature at 500°C. XRD pattern shows that the nanoparticles are consisted of predominantly (110)-oriented BaB 6 phase. The powders are polygonal-like shape with the average size of 200 nanometers. TEM identified that each nanoparticle shows perfect single crystal and cubic structure. The boron-to-barium atomic ratio of 5.24:1 was determined, less than the stoichiometric ratio of 6:1. BaB 6 nanoparticles can absorb infrared spectrum at 459, 690, 993, 1329, 1619, 2449 and 3423cm-1 in the test range of 400~4000cm-1, respectively. Three peaks at 677.1, 823.5 and 1116.4cm-1 can be observed clearly from the Raman spectra of BaB 6 nanoparticles at room temperature. The results showed that the electron dispersion of B 6 octahedron in BaB 6 is two-dimensional pancake-type without lattice distortion, which may account for the unique physical properties of BaB 6 nanoparticles.

Synthesis and Characterization of Superparamagnetic NiFe2O4 Nanoparticles

2010 ◽  
Vol 663-665 ◽  
pp. 1325-1328 ◽  
Author(s):  
De Hui Sun ◽  
De Xin Sun ◽  
Yu Hao
Keyword(s):  
Room Temperature ◽  
Size Range ◽  
X Ray Diffraction ◽  
Inverse Spinel ◽  
Cubic Crystal ◽  
Xrd Pattern ◽  
X Ray ◽  
Nife2o4 Nanoparticles ◽  
Average Size

The superparamagnetic NiFe2O4 nanoparticles were synthesized using a hydrothermal technology through P123 sphere micelles as ‘nanoreactor’ in this work. Their morphologies, structures, surface properties and magnetism were characterized by FE-SEM, XRD, FTIR, and VSM, respectively. The nickel ferrite samples are nearly spherical and homogeneous nanoparticles with average size range of about 50-120 nm. They possess superparamagnetism at room temperature and higher saturation magnetization. X-ray diffraction (XRD) pattern confirms that the samples belong to the cubic crystal system with an inverse-spinel structure. Fourier transform infrared (FTIR) absorption spectrum indicates that the NiFe2O4 nanoparticles are stabilized by the P123 adsorbed on the surface of nanoparticles.

Green Synthesis of Silk Sericin-Based Silver Nanoparticles

2011 ◽  
Vol 415-417 ◽  
pp. 487-490 ◽  
Author(s):  
Jia Li Ding ◽  
Wen Wu
Keyword(s):  
Silver Nanoparticles ◽  
Green Synthesis ◽  
Room Temperature ◽  
Reduction Reaction ◽  
In Situ Reduction ◽  
Silk Sericin ◽  
Vis Spectroscopy ◽  
Highly Dispersed ◽  
Average Size

Green synthesis of silver nanoparticles (AgNPs) using the silk sericin (SS) solution by in situ reduction at room temperature is reported. The effect of pH on the reduction reaction is studied by UV-Vis spectroscopy. The structure of the sericin-based silver nanoparticles is characterized by TEM. According to the TEM images, the average size of the silver nanoparticles is about 16 nm. The silver nanoparticles are highly dispersed and stable in silk sericin solution for monthes.

scholarly journals DEGRADASI METHYLENE BLUE MENGGUNAKAN KATALIS ZnO-PEG DENGAN METODE FOTOSONOLISIS

2017 ◽  
Vol 18 (02) ◽  
pp. 21-29
Author(s):  
Hary Sanjaya
Keyword(s):  
Methylene Blue ◽  
Polyethylene Glycol ◽  
Band Gap ◽  
Crystal Size ◽  
Hexagonal Structure ◽  
Ftir Spectrum ◽  
Xrd Pattern ◽  
Effect Of Ph ◽  
Maximum Time

Study about degradation of methylene blue using photosonolysis method has been done. This research aims to investigate  effect of variation radiation times, pH, and concentrations doping PEG (polyethylene glycol). The absorbance of samples was measured by a UV-Vis spectrophotometer. The result showed maximum time of irradiation to degradate methylene blue at 120 minutes, with  percentage degradation is 94.55%. The effect of pH showed maximum pH at 7 with  percentage degradation is 96,83%. Meanwhile, the effect of variation concentration doping PEG showed maximum result at ZnO-PEG 15%, with percentage degradation is 87,12%. Sample was characterization by  XRD, FTIR and UV-DRS. The XRD pattern showed  wurtzite (hexagonal) structure and has crystal size of 47-88 nm. FTIR spectrum showed that 425,33 cm-1  vibration strain for Zn-O. Analysis UV-DRS obtained band gap value is  3.19 eV.

Green Synthesis of Pyrido[2,1-a]isoquinolines and Pyrido[1,2-a]quinolines by Using ZnO Nanoparticles

Synlett ◽  
2017 ◽  
Vol 29 (04) ◽  
pp. 493-496 ◽  
Author(s):  
Fatemeh Sheikholeslami-Farahani ◽  
Maryam Ghazvini ◽  
Somayeh Soleimani-Amiri ◽  
Masoomeh Salimifard ◽  
Rezvaneh Rostamian
Keyword(s):  
Green Synthesis ◽  
Zno Nanoparticles ◽  
Room Temperature ◽  
Solvent Free ◽  
Quinoline Derivatives ◽  
Zno Nps ◽  
Efficient Catalyst ◽  
Solvent Free Conditions ◽  
Acetylenic Compounds

Pyrido[2,1-a]isoquinoline and pyrido[1,2-a]quinoline derivatives have been produced in good yields by the reaction of isoquinoline or quinoline, activated acetylenic compounds, α-halo ketones, and triphenylphosphine in the presence of ZnO nanoparticles (NPs) as an efficient catalyst under solvent-free conditions at room temperature. The reaction workup is easy, and the products can be readily separated from the reaction mixture. ZnO NPs markedly improved the yield of the product. The catalyst showed significant reusable activity.

Synthesis of Monodisperse Fe3O4 Microspheres and Effect of the Precursor Concentration

2011 ◽  
Vol 183-185 ◽  
pp. 2327-2330 ◽  
Author(s):  
De Hui Sun ◽  
De Xin Sun ◽  
Ming Xing Han
Keyword(s):  
Room Temperature ◽  
Size Range ◽  
Precursor Concentration ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
Xrd Pattern ◽  
X Ray ◽  
Magnetic Investigation ◽  
Cubic Structure ◽  
Average Size

In present work, we synthesized monodisperse Fe3O4microsphere using a free-surfactant solvothermal reduction route and investigated effect of the precursor concentration (FeCl3∙6H2O and NaAc) on microsphere sizes under other reaction conditions held constant. The morphologies, structures, and magnetism of the products were characterized by SEM, XRD, FTIR and VSM. The results showed that the Fe3O4 microsphere with a tunable average size range from 120 nm to 300 nm is composed of many Fe3O4collective nanoparticles. Their average diameters increased with increase of precursor FeCl3∙6H2O concentration but decreased with increase of precursor NaAc concentration. The X-ray diffraction (XRD) pattern confirmed that the Fe3O4microspheres belong to cubic structure. Magnetic investigation reveals that the Fe3O4microspheres have higher saturation magnetization and negligible coercivity at room temperature.

Synthesis and Characterization of Superparamagnetic Fe3O4 Nanoparticles

2013 ◽  
Vol 750-752 ◽  
pp. 340-343 ◽  
Author(s):  
De Hui Sun ◽  
Jiao Wu ◽  
Ji Lin Zhang
Keyword(s):  
Room Temperature ◽  
Thermal Method ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
Xrd Pattern ◽  
X Ray ◽  
Magnetic Investigation ◽  
Average Size

We synthesized Fe3O4 nanoparticles using a solvent thermal method and characterized the morphologies, structures, surface properties, thermal stability and magnetism of the products by Field emission scanning electron microscopy (FE-SEM), Powder X-ray diffraction (XRD), Fourier transform infrared (FTIR), thermal gravimetric analysis (TGA) and vibrating sample magnetometer (VSM). The experimental results showed that the Fe3O4 nanoparticles have a tunable average size range from 55 nm to 85 nm. Their diameters decreased with increase of precursor FeCl24H2O concentration or increase of the reaction time under other reaction conditions held constant. The XRD pattern confirmed that the Fe3O4 nanoparticles belong to cubic structure. Magnetic investigation reveals that the Fe3O4 nanoparticles have higher saturation magnetization and negligible coercivity at room temperature.

Structural and room temperature ferromagnetic properties of Ni doped ZnO nanoparticles via low-temperature hydrothermal method

2016 ◽  
Vol 502 ◽  
pp. 155-159 ◽  
Author(s):  
Kun Xu ◽  
Changzhen Liu ◽  
Rui Chen ◽  
Xiaoxiang Fang ◽  
Xiuling Wu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Hydrothermal Method ◽  
Zno Nanoparticles ◽  
Room Temperature ◽  
Ferromagnetic Properties ◽  
Doped Zno
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