Colloidal Synthesis of Organic-Capped ZnO Nanocrystals via a Sequential Reduction−Oxidation Reaction

2005 ◽  
Vol 109 (7) ◽  
pp. 2638-2644 ◽  
Author(s):  
P. Davide Cozzoli ◽  
Andreas Kornowski ◽  
Horst Weller
Keyword(s):  
Oxidation Reaction ◽  
Colloidal Synthesis ◽  
Zno Nanocrystals ◽  
Sequential Reduction

Layered Phosphonates in Colloidal Synthesis of Anisotropic ZnO Nanocrystals

2013 ◽  
Vol 25 (21) ◽  
pp. 4321-4329 ◽  
Author(s):  
Bryan M. Tienes ◽  
Russell J. Perkins ◽  
Richard K. Shoemaker ◽  
Gordana Dukovic
Keyword(s):  
Colloidal Synthesis ◽  
Zno Nanocrystals ◽  
Layered Phosphonates

Colloidal Synthesis and Characterization of Optically Active ZnO/ZnS Core/Shell Nanocrystals

2007 ◽  
Vol 1035 ◽  
Author(s):  
Krishnaprasad Sankar ◽  
Brian A. Akins ◽  
Tosifa A. Memon ◽  
Nathan J. Withers ◽  
Shin T. Bowers ◽  
...  
Keyword(s):  
Surface Defect ◽  
Optically Active ◽  
Colloidal Synthesis ◽  
Synthesis And Characterization ◽  
Pl Spectra ◽  
Uv Emission ◽  
Zno Nanocrystals ◽  
Wet Chemical ◽  
Acid Catalyzed

AbstractZnO colloidal nanocrystals have been synthesized using two different approaches and characterized by HRTEM, EDS, and photoluminescence spectroscopy. ZnO nanocrystals synthesized from zinc alkoxy alkyl precursors in the MeIm/H2O coordinating solvent showed only visible surface-defect related emission in their PL spectra. No band-to-band UV emission was observed after ZnS coating of those ZnO nanocrystals. In contrast, a strong band-to-band UV emission dominated PL spectra of ZnO nanocrystals synthesized through wet-chemical acid-catalyzed esterification of zinc acetate.

scholarly journals Plasmonic Ge-doped ZnO nanocrystals

2015 ◽  
Vol 51 (62) ◽  
pp. 12369-12372 ◽  
Author(s):  
Enrico Della Gaspera ◽  
Noel W. Duffy ◽  
Joel van Embden ◽  
Lynne Waddington ◽  
Laure Bourgeois ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Colloidal Synthesis ◽  
Zno Nanocrystals ◽  
Doped Zno ◽  
Zno Nanocrystal

The first colloidal synthesis of Ge-doped ZnO nanocrystals is presented. Ge dopants induce a surface plasmon resonance in the infrared and affect the ZnO nanocrystal morphology.

Scanning Electron Microscope Study of Bacteria on Mineral Surfaces

1976 ◽  
Vol 34 ◽  
pp. 130-131
Author(s):  
V.K. Berry
Keyword(s):  
Oxidation Reaction ◽  
Electron Microscope Study ◽  
Elemental Sulfur ◽  
Thiobacillus Ferrooxidans ◽  
Physical Contact ◽  
Metal Sulfides ◽  
Low Grade ◽  
Mineral Surfaces ◽  
Mineral Surface ◽  
Scanning Electron Microscope Study

There are two strains of bacteria viz. Thiobacillus thiooxidansand Thiobacillus ferrooxidanswidely mentioned to play an important role in the leaching process of low-grade ores. Another strain used in this study is a thermophile and is designated Caldariella .These microorganisms are acidophilic chemosynthetic aerobic autotrophs and are capable of oxidizing many metal sulfides and elemental sulfur to sulfates and Fe2+ to Fe3+. The necessity of physical contact or attachment by bacteria to mineral surfaces during oxidation reaction has not been fairly established so far. Temple and Koehler reported that during oxidation of marcasite T. thiooxidanswere found concentrated on mineral surface. Schaeffer, et al. demonstrated that physical contact or attachment is essential for oxidation of sulfur.

NANOELECTROCATALYSTS BASED PALLADIUM FOR FUEL CELLS WITH DIRECT OXIDATION OF FORMIC ACID

2019 ◽  
Vol 6 (3) ◽  
pp. 104-107
Author(s):  
Marina Vladimirovna Lebedeva ◽  
Alexey Petrovich Antropov ◽  
Alexander Victorovich Ragutkin ◽  
Nicolay Andreevich Yashtulov
Keyword(s):  
Formic Acid ◽  
Palladium Nanoparticles ◽  
Oxidation Reaction ◽  
Electrode Materials ◽  
Formic Acid Oxidation ◽  
Energy Sources ◽  
Acid Oxidation ◽  
Direct Oxidation ◽  
Atomic Force ◽  
Formic Acid Oxidation Reaction

In paper electrode materials with palladium nanoparticles on polymer matrix substrates for energy sources have been formed. Nanocomposites were investigated by atomic force and scanning electron microscopy. The catalytic activity of formed electrodes in the formic acid oxidation reaction was evaluated by voltammetry method.

Impact Of Synthesis Route on the Water Oxidation Kinetics of Hematite Photoanodes

2020 ◽  
Author(s):  
Camilo A. Mesa ◽  
Ludmilla Steier ◽  
Benjamin Moss ◽  
Laia Francàs ◽  
James E. Thorne ◽  
...  
Keyword(s):  
Oxygen Vacancy ◽  
Reaction Kinetics ◽  
Water Oxidation ◽  
Oxidation Kinetics ◽  
Oxidation Reaction ◽  
Charge Accumulation ◽  
Optical Signals ◽  
Current Voltage ◽  
Voltage Performance ◽  
Kinetics Of

<p><i>Operando</i> spectroelectrochemical analysis is used to determine the water oxidation reaction kinetics for hematite photoanodes prepared using four different synthetic procedures. Whilst these photoanodes exhibit very different current / voltage performance, their underlying water oxidation kinetics are found to be almost invariant. Lower photoanode performance was found to correlate with the observation of optical signals indicative of charge accumulation in mid-gap oxygen vacancy states, indicating these states do not contribute directly to water oxidation.</p>

The Synthesis of New Selenium-containing Heterocycles by the Oxidation Reaction of 2,4-Diaryltetrahydro-4H-selenochromenes

2020 ◽  
Vol 24 (15) ◽  
pp. 1663-1668
Author(s):  
Dmitriy Yurievich Direnko ◽  
Boris Ivanovich Drevko ◽  
Yaroslav Borisovich Drevko
Keyword(s):  
Nucleophilic Substitution ◽  
Chlorine Atom ◽  
Oxidation Reaction ◽  
Heterocyclic Fragment ◽  
Oxidative Aromatization

We have explored the reactions of tetrahydro-4H-selenochromenes in the presence of phosphoric pentachloride, and synthesized new condensate aroylbenzoselenophenes. During the reactions, tetrahydro-4H-selenochromenes with phosphoric pentachloride underwent oxidative aromatization and nucleophilic substitution for a chlorine atom of one of the protons in the alicyclic fragment. Also, the narrowing of the heterocyclic fragment occurred as in synthesized selenium-containing compounds earlier transformed into the corresponding condensate aroylbenzoselenophenes.

Efficient Alcohol Oxidation Reaction Catalyzed by a Cobalt (II) and an Iron (III) Complexes Containing DPEPhos Ligand using H2O2 as Oxidant

2014 ◽  
Vol 11 (9) ◽  
pp. 671-676 ◽  
Author(s):  
Debojeet Sahu ◽  
Biplab Banik ◽  
Malabika Borah ◽  
Pankaj Das
Keyword(s):  
Oxidation Reaction ◽  
Alcohol Oxidation
Sign in / Sign up

Export Citation Format

Share Document