scholarly journals A sol–gel synthesis to prepare size and shape-controlled mesoporous nanostructures of binary (II–VI) metal oxides

RSC Advances ◽  
2020 ◽  
Vol 10 (24) ◽  
pp. 14134-14146 ◽  
Author(s):  
Ryan Yarbrough ◽  
Klinton Davis ◽  
Sheeba Dawood ◽  
Hemali Rathnayake
Keyword(s):  
Low Temperature ◽  
Metal Oxides ◽  
Self Assembly ◽  
Sol Gel ◽  
Assembly Process ◽  
Oxide Nanostructures ◽  
Metal Oxide Nanostructures ◽  
Shape Controlled ◽  
Sol Gel Synthesis ◽  
Mesoporous Metal

A base-catalyzed sol–gel approach combined with a solvent-driven self-assembly process at low temperature is augmented to make highly mesoporous metal oxide nanostructures of manganese and copper, and hydroxide nanostructures of magnesium.

Review. Non-aqueous Sol-Gel Routes to Metal Oxide Nanocrystals under Solvothermal Conditions: Review and Case Study on Doped Group IV Metal Oxides

2010 ◽  
Vol 65 (8) ◽  
pp. 1015-1023 ◽  
Author(s):  
Andrea Pucci ◽  
Nicola Pinna
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Sol Gel ◽  
Group Iv ◽  
Oxide Nanostructures ◽  
Metal Oxide Nanostructures ◽  
Number Of Publications ◽  
Sol Gel Synthesis ◽  
Solvothermal Conditions

Over the last decade, the number of publications concerning the non-aqueous sol-gel synthesis of metal oxide nanostructures has rapidly increased, as this method affords an immense variety of sizes and shapes of the products. This review highlights the versatility of non-aqueous sol-gel routes, under solvothermal conditions, to metal oxide and hybrid materials. In particular, the easier control over the reaction kinetics, compared to aqueous methods, allows to better match the reactivity between metal oxide precursors. This permits to produce complex multimetal and doped oxides at low temperature, as it is discussed in detail for the case of doped group IV metal oxides

scholarly journals Band gap engineered zinc oxide nanostructures via a sol–gel synthesis of solvent driven shape-controlled crystal growth

RSC Advances ◽  
2019 ◽  
Vol 9 (26) ◽  
pp. 14638-14648 ◽  
Author(s):  
Klinton Davis ◽  
Ryan Yarbrough ◽  
Michael Froeschle ◽  
Jamel White ◽  
Hemali Rathnayake
Keyword(s):  
Zinc Oxide ◽  
Crystal Growth ◽  
Growth Process ◽  
Sol Gel ◽  
Zno Nanostructures ◽  
Zinc Oxide Nanostructures ◽  
Oxide Nanostructures ◽  
Crystal Growth Process ◽  
Shape Controlled ◽  
Sol Gel Synthesis

A reliable and simple sol–gel synthesis followed by a solvent-driven, shape controlled, crystal growth process to make ZnO nanostructures is demonstrated.

scholarly journals Organosulfur adsorbents by self-assembly of titania based ternary metal oxide nanofibers

2017 ◽  
Vol 5 (20) ◽  
pp. 9561-9571 ◽  
Author(s):  
Ruohong Sui ◽  
Sarah K. Carefoot ◽  
Christopher B. Lavery ◽  
Connor E. Deering ◽  
Kevin L. Lesage ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Self Assembly ◽  
Selective Adsorption ◽  
Sol Gel ◽  
One Pot ◽  
Ternary Metal ◽  
Sol Gel Synthesis

One-pot sol–gel synthesis of ternary metal oxides for selective adsorption of thiols from H2S/CO2-containing gas.

scholarly journals Extremely fast electrochromic supercapacitors based on mesoporous WO3 prepared by an evaporation-induced self-assembly

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Keon-Woo Kim ◽  
Tae Yong Yun ◽  
Sang-Hoon You ◽  
Xiaowu Tang ◽  
Jaeyong Lee ◽  
...  
Keyword(s):  
Energy Storage ◽  
Metal Oxides ◽  
Self Assembly ◽  
High Current Density ◽  
High Surface ◽  
Sol Gel ◽  
Energy Storage Devices ◽  
Mesoporous Metal Oxides ◽  
Evaporation Induced Self Assembly ◽  
Mesoporous Metal

AbstractMesoporous metal oxides consisting of fully interconnected network structures with small pores (20–50 nm) have high surface areas and decreased ion intercalation distances, making them ideal for use in high-performance electrochromic supercapacitors (ECSs). Evaporation-induced self-assembly (EISA), which combines sol–gel chemistry and molecular self-assembly, is a powerful method for the fabrication of mesoporous metal oxides through a solution phase synthesis. Herein, we introduce ultrafast sub-1 s ECSs based on an amorphous mesoporous tungsten trioxide (WO3) that is prepared by EISA. Compared to that of a compact-WO3 film-based device, the performances of an ECS with mesoporous WO3 exhibits a large optical modulation (76% at 700 nm), ultrafast switching speeds (0.8 s for coloration and 0.4 s for bleaching), and a high areal capacitance (2.57 mF/cm2), even at a high current density (1.0 mA/cm2). In addition, the excellent device stability during the coloration/bleaching and charging/discharging cycles is observed under fast response conditions. Moreover, we fabricated a patterned mesoporous WO3 for ECS displays (ECSDs) via printing-assisted EISA (PEISA). The resulting ECSDs can be used as portable energy-storage devices, and their electrochromic reflective displays change color according to their stored energy level. The ECSDs in this work have enormous potential for use in next-generation smart windows for buildings and as portable energy storage displays.

Sol–gel synthesis of 2-dimensional TiO2: self-assembly of Ti–oxoalkoxy–acetate complexes by carboxylate ligand directed condensation

2021 ◽  
Author(s):  
Ruohong Sui ◽  
Connor E. Deering ◽  
Rohen Prinsloo ◽  
Christopher B. Lavery ◽  
Nancy Chou ◽  
...  
Keyword(s):  
Self Assembly ◽  
Sol Gel ◽  
Carboxylate Ligand ◽  
Sol Gel Synthesis ◽  
First Time

2-Dimensional TiO2 is synthesized for the first time by a sol–gel self-assembly of Ti–oxoalkoxy–acetate complexes.

scholarly journals Self-assembly of iron oxide precursor micelles driven by magnetic stirring time in sol–gel coatings

RSC Advances ◽  
2019 ◽  
Vol 9 (31) ◽  
pp. 17571-17580 ◽  
Author(s):  
J. López-Sánchez ◽  
A. Serrano ◽  
A. del Campo ◽  
M. Abuín ◽  
E. Salas-Colera ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Self Assembly ◽  
Sol Gel ◽  
Oxide Precursor ◽  
Magnetic Stirring ◽  
Stirring Time ◽  
Self Assembled ◽  
Sol Gel Synthesis

Sol–gel synthesis of self-assembled iron oxide precursor micelles.

Modification of Solvolytic Sol-Gel Synthesis for Low Temperature TiO2 DSSC Photoelectrode

2014 ◽  
Vol 979 ◽  
pp. 39-42
Author(s):  
Saran Kalasina ◽  
Taweechai Amornsakchai ◽  
Udom Asawapirom
Keyword(s):  
Low Temperature ◽  
Tin Oxide ◽  
Hydrofluoric Acid ◽  
Sol Gel ◽  
Cell Efficiency ◽  
Dye Sensitized ◽  
Degussa P25 ◽  
Main Component ◽  
Sol Gel Synthesis ◽  
Dry Film

Solvolytic sol-gel synthesis was applied for the low temperature production of photoelectrode for dye-sensitized solar cell (DSSC). In this study, commercial TiO2 standard (Degussa P25) was used as the main component in the preparation of photoelectrode film. Addition of TiO2 gel prepared from a solvolytic sol-gel method reduced cracking in the dry film while still maintains porosity. Further modification by simply adding hydrofluoric acid (HF) and ammonia (NH3) increase porosity and improve interconnection between fluorine doped tin oxide (FTO) layer on the substrate and the coated TiO2 layer even under low temperature baking condition (<150°C). The modified TiO2 electrode showed significantly better electrical and electrochemical properties. Furthermore, the DSSC cell with modified TiO2 film also showed higher cell efficiency when compared with the controlled cell that used only Degussa P25.

Comparison of Several CU(I) and CU(II) Precursors for the Sol-Gel Preparation of High TC Superconducting Metal Oxides

1988 ◽  
Vol 121 ◽  
Author(s):  
Mariquita A. Accibal ◽  
Jonathan W. Draxton ◽  
Allen H. Gabor ◽  
Wayne L. Gladfelter ◽  
Beth Anne Hassler ◽  
...  
Keyword(s):  
Thin Films ◽  
Metal Oxides ◽  
Coordination Compounds ◽  
Sol Gel ◽  
High Tc ◽  
Superconducting Metal ◽  
Zero Resistance ◽  
Gel Preparation ◽  
Sol Gel Synthesis

ABSTRACTA comparison of the use of three different coordination compounds of copper as precursors for the sol-gel synthesis of YBa2Cu3O7-δ has been made. For yttrium, the tris(isopropoxide) was used exclusively, while the use of both Ba(O-i-Pr)2 and Ba(OCH2CH2OEt)2 (prepared in situ from Ba metal) as sources for Ba were studied. After dissolving Y(O-i-pr)3, a Ba source, and the copper(I) alkoxide, [Cu(O-i-Bu)]4, hydrolysis led immediately to an orange gelatinous solid which yielded YBa2Cu3O7-δ upon firing in oxygen. Copper(II) acetate was found to give heterogeneous mixtures under our conditions and was not further studied. Copper(II) acac (acac = acetylacetonate) yielded the best results. Partially hydrolyzed solutions of Cu(acac)2, Ba(OCH2CH2OEt)2, and Y(O-i-pr)3 were spin coated on SrTi03 (100) and fired under oxygen to give oriented (b axis normal to the surface) thin films of YBa2Cu3O7-δ. The onset of superconductivity for the films was 92 K, but they did not reach zero resistance until much lower temperatures.

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