ZnO nanoparticles obtained by ball milling technique: Structural, micro-structure, optical and photo-catalytic properties

2016 ◽  
Author(s):  
S. Balamurugan ◽  
Josny Joy ◽  
M. Anto Godwin ◽  
S. Selvamani ◽  
T. S. Gokul Raja
Keyword(s):  
Ball Milling ◽  
Zno Nanoparticles ◽  
Catalytic Properties ◽  
Micro Structure ◽  
Ball Milling Technique

scholarly journals FABRICACIÓN DE ELECTRODOS NANOESTRUCTURADOS DE ZnO PARA APLICACIONES FOTOVOLTAICAS

2017 ◽  
Vol 23 (2) ◽  
pp. 45
Author(s):  
Carlos Ramos ◽  
Anthony Huamán ◽  
María Quintana ◽  
Walter Estrada
Keyword(s):  
Ball Milling ◽  
Zno Nanoparticles ◽  
Dye Sensitized Solar Cells ◽  
Redox Mediators ◽  
Dye Sensitized ◽  
Palabras Clave ◽  
Current Voltage ◽  
Conductive Substrates ◽  
Ball Milling Technique ◽  
Sensitized Solar Cells

Se fabricaron electrodos para celdas solares sensibilizadas con colorante (DSCs) que consisten en nanopartículas de ZnO depositadas sobre sustratos conductores de SnO2:F. Las nanopartículas de ZnO fueron fabricadas por la técnica de molienda mecánica en medio húmedo las cuales sirvieron para obtener una pasta viscosa que fue depositada sobre el sustrato por la técnica dr. blade. Luego de sinterizarlas se procedió a sensibilizarlas con colorantes orgánicos o metalorgánicos como el D35 y el N719 respectivamente durante aproximadamente 14 horas. Se utilizaron electrolitos líquidos donde uno de ellos contiene al par redox yoduro (I-) triyoduro (I-3 ) y el otro usa un complejo con cobalto reducido (Co(bpy)3(PF6)+2/+3); como contraelectrodos se usó el platino y el polímero PEDOT. Las celdas selladas reportaron eficiencias máximas de 1.6% y valores en la conversión de fotones a corriente (IPCE) de aproximadamente 60% para una longitud de onda de 500nm.. Palabras clave.-Molienda mecánica, Nanopartículas de ZnO, Corriente-voltaje, IPCE. ABSTRACTElectrodes for Dye Sensitized Solar Cells (DSCs) were made using ZnO nanoparticles deposited over conductive substrates of SnO2:F (FTO). ZnO nanoparticles were obtained by the wet ball milling technique. Then these particles were used to make a viscous paste which was deposited over the substrate by the dr. lade method. After sintering, the electrodes were sensitized with organic and metalorganic dyes like D35 and N719 respectively during 14 hours. Liquid electrolytes with redox mediators like iodide/ triiodide redox cuple and cobalt complexes were used. Also platinum and polymer (PEDOT) covers were used like counterelectrodes. Sealed cells reported efficiencies values as high as 1.6% and values for incident photo conversion efficiency (IPCE) close to 60% at 500nm.. Keywords.-Ball milling, ZnO nanoparticles, Current-voltage, IPCE..

Synergetic catalytic effect of ionic liquids and ZnO nanoparticles on the selective synthesis of 1,2-disubstituted benzimidazoles using a ball-milling technique

2015 ◽  
Vol 17 (8) ◽  
pp. 4263-4270 ◽  
Author(s):  
Hemant Sharma ◽  
Navneet Kaur ◽  
Narinder Singh ◽  
Doo Ok Jang
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ball Milling ◽  
Zno Nanoparticles ◽  
Catalytic Effect ◽  
Solvent Free ◽  
Selective Synthesis ◽  
Ball Milling Technique

A solvent-free selective synthesis of 1,2-disubstituted benzimidazoles was developed in the presence of recyclable ionic liquid-coated ZnO-nanoparticles using a ball-milling technique.

Multifunctional Ni-Mn-Ga and Ni-Mn-Cu-Ga Heusler particles towards the nanoscale by ball-milling technique

2021 ◽  
Vol 872 ◽  
pp. 159747
Author(s):  
Greta Cavazzini ◽  
Francesco Cugini ◽  
Davide Delmonte ◽  
Giovanna Trevisi ◽  
Lucia Nasi ◽  
...  
Keyword(s):  
Ball Milling ◽  
Ball Milling Technique

Enhanced Antibacterial Activity and Photo-Catalytic Properties of ZnO Nanoparticles: Pedalium Murex Plant Extract-Assisted Synthesis

2019 ◽  
Vol 19 (5) ◽  
pp. 2888-2894 ◽  
Author(s):  
N Babitha ◽  
L. Srimathi Priya ◽  
S. Rosy Christy ◽  
A Manikandan ◽  
A Dinesh ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Plant Extract ◽  
Zno Nanoparticles ◽  
Catalytic Properties ◽  
Pedalium Murex

Formation of nanostructured Al 64 Cu 23 Fe 13 icosahedral quasicrystal by the ball milling technique

LACAME 2008 ◽  
2009 ◽  
pp. 105-109
Author(s):  
J. Quispe Marcatoma ◽  
C. V. Landauro ◽  
M. Taquire ◽  
Ch. Rojas Ayala ◽  
M. Yaro ◽  
...  
Keyword(s):  
Ball Milling ◽  
Icosahedral Quasicrystal ◽  
Ball Milling Technique

Isolation of Cellulose Nanofibers (CNFs) based on Ball-milling Technique Combined with Supercritical Carbon dioxide/ethanol Pretreatment

2021 ◽  
Author(s):  
Zhijun Hu ◽  
Xinyu Cao ◽  
Guanhong Huang ◽  
Daliang Guo
Keyword(s):  
Thermal Stability ◽  
Reaction Time ◽  
Ball Milling ◽  
High Efficiency ◽  
Cellulose Nanofibers ◽  
Sem Images ◽  
Tempo Oxidation ◽  
Good Thermal Stability ◽  
Ethanol Pretreatment ◽  
Ball Milling Technique

Abstract Here, a new pretreatment method has been developed to produce CNFs from micro-fibrillated cellulose (MFC) by supercritical CO 2 pretreatment followed with ball-milling (SCB). MFC was obtained from cotton stalk by chemical purification.Experimental factors were controlled to enhance the properties of SCB-CNF, meanwhile a comparative study was conducted with the method of TEMPO oxidation and microfluid homogenization (TMH). Compared to TMH-CNF, the SCB-CNF has such advantages as Energy saving, high efficiency and environmental protection, indicating a wide application in heat-resistant materials, load materials and other fields. The solid yields of P-MFC after supercritical CO 2 pretreatment gradually decreased together with the temperature and the reaction time. Scanning electron microscope (SEM) images of the SCB-CNF and TMH-CNF show that the morphology of the SCB-CNF was basically acicular but that of the TMH-CNF was mainly soft fibrous. The SCB-CNF is smaller in width and shorter in length, and its size is between CNC and CNF. Thermal gravimetric results suggest that the thermal stability of the SCB-CNF was substantially higher than those of the TMH-CNF. XRD results indicate that the crystallinity showed an initial increasing trend and then declined with increasing temperature and reaction time, and the crystallinity value of SCB-CNF was larger than that of CNFs. The smaller SCB-CNF became rougher and had a larger surface area. High crystallinity make good thermal stability, short and coarse fiber, easier to disperse than CNF, less energy consumption for dispersion, better than 3D mesh. It can be widely used in polymer composites, reinforcing agents, membrane materials and other fields.

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