Synthesis of CoFe2O4 nanowire arrays by sol–gel template method

2003 ◽  
Vol 379 (5-6) ◽  
pp. 484-489 ◽  
Author(s):  
Guangbin Ji ◽  
Shaolong Tang ◽  
Baolong Xu ◽  
Benxi Gu ◽  
Youwei Du
Keyword(s):  
Sol Gel ◽  
Nanowire Arrays ◽  
Template Method

Sol-gel Template Synthesis and Liquid CO2 Developed TiO2/CdS Composite Nanowire Arrays

2002 ◽  
Vol 737 ◽  
Author(s):  
Bin Cheng ◽  
Clarence W. Murray ◽  
Edward T. Samulski
Keyword(s):  
Template Synthesis ◽  
Sol Gel ◽  
Nanowire Arrays ◽  
Template Method ◽  
Purification Process ◽  
Liquid Co2

ABSTRACTTiO2/CdS composite nanowire (∼ 200 nm diameter and ∼ 50 μm length) arrays were successfully prepared by the sol-gel template method. An anticipated good nanowire arrays was obtained by using liquid or supercritical CO2 to develop the target materials in purification process. The morphology, crystallinity, and composition of the product was characterized by SEM, XRD, and EDX.

scholarly journals Fabrication of Superconducting Nanowires Using the Template Method

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1970
Author(s):  
Michael Rudolf Koblischka ◽  
Anjela Koblischka-Veneva
Keyword(s):  
High Temperature ◽  
High Temperature Superconductors ◽  
Sol Gel ◽  
Template Method ◽  
Aao Template ◽  
Superconducting Nanowires ◽  
Research Directions ◽  
Templating Method ◽  
Fabrication And Characterization

The fabrication and characterization of superconducting nanowires fabricated by the anodic aluminium oxide (AAO) template technique has been reviewed. This templating method was applied to conventional metallic superconductors, as well as to several high-temperature superconductors (HTSc). For filling the templates with superconducting material, several different techniques have been applied in the literature, including electrodeposition, sol-gel techniques, sputtering, and melting. Here, we discuss the various superconducting materials employed and the results obtained. The arising problems in the fabrication process and the difficulties concerning the separation of the nanowires from the templates are pointed out in detail. Furthermore, we compare HTSc nanowires prepared by AAO templating and electrospinning with each other, and give an outlook to further research directions.

Preparation of Bi0.85Nd0.15FeO3 Nanotube Arrays by a Sol–Gel Template Method

2011 ◽  
Vol 40 (3) ◽  
pp. 340-343 ◽  
Author(s):  
Dongyun Guo ◽  
Yiping Gong ◽  
Changyong Liu ◽  
Chuanbin Wang ◽  
Qiang Shen ◽  
...  
Keyword(s):  
Sol Gel ◽  
Template Method ◽  
Nanotube Arrays

Silicon dioxide nanotubes prepared by anodic alumina as templates

2000 ◽  
Vol 15 (2) ◽  
pp. 387-392 ◽  
Author(s):  
Ming Zhang ◽  
Y. Bando ◽  
K. Wada
Keyword(s):  
Silicon Dioxide ◽  
Aging Time ◽  
Room Temperature ◽  
Sol Gel ◽  
Silica Sol ◽  
Anodic Alumina ◽  
Template Method ◽  
Nanochannel Array ◽  
Inside Wall ◽  
Dipping Time

Aligned slicon dioxide nanotubes with diameters of 30–40 nm synthesized by the sol-gel template method are presented. This process involves the growth of nanotubes from ordered nanochannel-array pores in anodic alumina. For a silica sol aged at room temperature and dipped for 1 min, nanowires were formed in a shorter period of aging time (2 days); nanotubes connecting with solid nanofibers were obtained in a longer aging time (30 days). The formation of nanotubes depends strongly on the temperature of the sol. For a short dipping time (<1 min), bamboolike nanofibers were prepared when the sol was at high temperature (50 °C); however, perfect nanotubes with the sharp wall were synthetized for the lower sol temperature (5 °C). The lower sol temperature is, the smoother the inside wall of nanotubes is. It is proved that viscosity plays an important role on the morphology of nanotubes.

scholarly journals Sol-Gel Template Synthesis and Characterization of Lu2O3:Eu3+ Nanowire Arrays

Micromachines ◽  
2018 ◽  
Vol 9 (11) ◽  
pp. 601
Author(s):  
Yahua Hu ◽  
Mu Gu ◽  
Xiaolin Liu ◽  
Juannan Zhang ◽  
Shiming Huang ◽  
...  
Keyword(s):  
Sol Gel ◽  
Nanowire Arrays ◽  
X Ray Diffraction ◽  
Aao Template ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Sol Gel Process ◽  
Optical Luminescence ◽  
Uniform Diameter

Uniform Lu2O3:Eu3+ nanowire arrays were successfully prepared by the sol-gel process using anodic aluminum oxide (AAO) templates. The as-synthesized nanowires are homogeneous, highly ordered, and dense and have a uniform diameter of ~300 nm defined by the AAO templates. The X-ray diffraction and selected area electron diffraction results show that the Lu2O3:Eu3+ nanowires have a polycrystalline cubic structure, and the crystallite size of the Lu2O3:Eu3+ nanowires is confined by the AAO template. The nanowires within the AAO template showed good photoluminescence and X-ray-excited optical luminescence performances for Lu2O3:Eu3+. The emission peaks were attributed to the 5D0 → 7FJ transitions of Eu3+ (J = 0, 1, 2, 3).

scholarly journals The Photocatalytic Reduction of Hexavalent Chromium by Controllable Mesoporous Anatase TiO2Nanoparticles

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Vorrada Loryuenyong ◽  
Natnapin Jarunsak ◽  
Thirawich Chuangchai ◽  
Achanai Buasri
Keyword(s):  
Particle Size ◽  
Activated Carbon ◽  
Hexavalent Chromium ◽  
Sol Gel ◽  
Blue Shift ◽  
Titania Nanoparticles ◽  
Template Method ◽  
Ultraviolet Illumination ◽  
Porous Titania ◽  
Reduction Efficiency

Titania (TiO2) nanoparticles with periodical mesopore size (up to 150 Å) have successfully been synthesized by sol-gel template method, using titanium(IV) tetraisopropoxide as a starting precursor and isopropanol as a solvent. Different quantities of activated carbon (0%, 5%, and 10% by weight) were used as templates to control the porosity and particle size of titania nanoparticles. The templates were completely removed during the calcination in air at 500°C for 3 hr. The results showed that the specific surface area of titania is increased with increasing activated carbon content. The optical bandgap of synthesized titania exhibits a blue shift by 0.3–0.6 eV when compared to the reported value for the bulk anatase and rutile phases. The photocatalytic activity of porous titania is determined with its reduction efficiency of hexavalent chromium (Cr6+). The reduction efficiency is optimized under ultraviolet illumination.

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