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.

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

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.

Bromopropane as a Novel Bromine Precursor for the Completely Amine Free Colloidal Synthesis of Ultra-Stable and Highly Luminescent Green-Emitting Cesium Lead Bromide (CsPbBr3) Perovskite Nanocrystals

Nanoscale ◽  
2021 ◽  
Author(s):  
Syed Akhil ◽  
V.G.Vasavi Dutt ◽  
Nimai Mishra
Keyword(s):  
Optoelectronic Devices ◽  
Colloidal Synthesis ◽  
Ambient Conditions ◽  
Active Materials ◽  
Perovskite Nanocrystals ◽  
Lead Bromide ◽  
Halide Perovskite ◽  
Lead Halide ◽  
Poor Stability

Recently lead halide perovskite nanocrystals (PNCs) have attracted intense interest as promising active materials for optoelectronic devices. However, their extensive applications are still hampered by poor stability in ambient conditions....

scholarly journals Superhydrophobic Sands for the Preservation and Purification of Water

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 151
Author(s):  
Yuyang Liu ◽  
Chang-Hwan Choi
Keyword(s):  
Water Surface ◽  
Particulate Material ◽  
Self Assembled Monolayer ◽  
Hydrophobic Coatings ◽  
Hydrophobic Coating ◽  
Evaporation Loss ◽  
Zno Nanocrystals ◽  
Sand Particles ◽  
Purification Of Water ◽  
Nanoscale Roughness

Sand, a cheap and naturally abundant particulate material, was modified with photocatalytic and hydrophobic coatings to reduce evaporation loss and facilitate the purification of water. The first-level photocatalytic coatings (TiO2 or ZnO nanocrystals) rendered nanoscale roughness on the surface of the sand. The additional second-level hydrophobic coating of a self-assembled monolayer of octyltrimethoxysilane (OTS) made the sand particles superhydrophobic because of the nanoscale roughness imposed by the nanocrystals. The superhydrophobic sand particles, floating on the free surface of water due to their superhydrophobicity, significantly reduced the evaporation loss of water by 60%–90% in comparison to an uncovered water surface. When the outer hydrophobic coatings are weathered or disengaged, the inner photocatalytic coatings become exposed to water. Then, the sand particles act as photocatalysts to degrade the contaminants in water under solar radiation.

Effect of infrared irradiation on immobilization of ZnO nanocrystals on multiwalled carbon nanotubes

2012 ◽  
Vol 14 (9) ◽  
Author(s):  
B. R. Venugopal ◽  
S. Detriche ◽  
J. Delhalle ◽  
Z. Mekhalif
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Infrared Irradiation ◽  
Multiwalled Carbon ◽  
Zno Nanocrystals

scholarly journals Understanding Selectivity in CO2 Hydrogenation to Methanol for MoP Nanoparticle Catalysts Using In Situ Techniques

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 143
Author(s):  
Melis S. Duyar ◽  
Alessandro Gallo ◽  
Samuel K. Regli ◽  
Jonathan L. Snider ◽  
Joseph A. Singh ◽  
...  
Keyword(s):  
Formation Rate ◽  
Methanol Conversion ◽  
Transition Metal Catalysts ◽  
Colloidal Synthesis ◽  
X Ray ◽  
In Situ Techniques ◽  
Methanol Formation ◽  
Diffuse Reflectance Infrared ◽  
Formate Intermediate

Molybdenum phosphide (MoP) catalyzes the hydrogenation of CO, CO2, and their mixtures to methanol, and it is investigated as a high-activity catalyst that overcomes deactivation issues (e.g., formate poisoning) faced by conventional transition metal catalysts. MoP as a new catalyst for hydrogenating CO2 to methanol is particularly appealing for the use of CO2 as chemical feedstock. Herein, we use a colloidal synthesis technique that connects the presence of MoP to the formation of methanol from CO2, regardless of the support being used. By conducting a systematic support study, we see that zirconia (ZrO2) has the striking ability to shift the selectivity towards methanol by increasing the rate of methanol conversion by two orders of magnitude compared to other supports, at a CO2 conversion of 1.4% and methanol selectivity of 55.4%. In situ X-ray Absorption Spectroscopy (XAS) and in situ X-ray Diffraction (XRD) indicate that under reaction conditions the catalyst is pure MoP in a partially crystalline phase. Results from Diffuse Reflectance Infrared Fourier Transform Spectroscopy coupled with Temperature Programmed Surface Reaction (DRIFTS-TPSR) point towards a highly reactive monodentate formate intermediate stabilized by the strong interaction of MoP and ZrO2. This study definitively shows that the presence of a MoP phase leads to methanol formation from CO2, regardless of support and that the formate intermediate on MoP governs methanol formation rate.

Two-step colloidal synthesis of micron-scale Bi2O2Se nanosheets and their electrostatic assembly for thin-film photodetectors with fast response

2021 ◽  
Author(s):  
Xixi Pang ◽  
Yingtao Zhao ◽  
Xiangxiang Gao ◽  
Guoqi Wang ◽  
Hao Sun ◽  
...  
Keyword(s):  
Thin Film ◽  
Fast Response ◽  
Colloidal Synthesis ◽  
Electrostatic Assembly

Enhanced electromagnetic wave absorption properties of carbon nanofibers embedded with ZnO nanocrystals

2021 ◽  
pp. 160132
Author(s):  
Jinyang Li ◽  
Bushi Dai ◽  
Yujie Qi ◽  
Yuxiang Dai ◽  
Yang Qi
Keyword(s):  
Electromagnetic Wave ◽  
Carbon Nanofibers ◽  
Absorption Properties ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Zno Nanocrystals
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