Controllable Synthesis of Monodisperse Metal Oxide Nanostructures via a Solvothermal Route and Their Catalytic Properties

2014 ◽  
Vol 576 ◽  
pp. 21-25
Author(s):  
Ling Liu ◽  
Xiao Jun Zhang ◽  
Jian Zhou Liu ◽  
Rui Yu Wang
Keyword(s):  
Metal Oxide ◽  
Catalytic Properties ◽  
Vinyl Pyrrolidone ◽  
Controllable Synthesis ◽  
X Ray ◽  
Oxide Nanostructures ◽  
Metal Oxide Nanostructures ◽  
Electron Microscopes ◽  
Poly Vinyl Pyrrolidone ◽  
Scanning Electron Microscopes

The monodisperse Mn2O3 nanooctahedron, Mn3O4 nanorices, NiO nanoflowers and Cu2O nanoroses have been synthesized via a facile solvothermal approach in the presence of poly (vinyl-pyrrolidone)/stearic acid (PVP/SA) as capping agent. Field-emission scanning electron microscopes (FESEM) and X-ray powder diffraction (XRD) were employed to detect the prepared products. Furthermore, the synthetic method appears to be a general approach and other metal oxide materials with various well-defined nano/microstructures can be fabricated by the similar method. The as-obtained metal oxides nanostructures were used as catalyst in CO oxidation, and the octahedral Mn2O3 nanoparticles exhibited relatively high activity. Complete conversion CO to CO2 can be achieved at a temperature as low as 240 °C over Mn2O3 catalyst, which was about 70 and 100 °C lower than that of Mn3O4 and NiO, respectively.

Facile Synthesis of NiO Nanoflowers and their Application in Water Treatment

2014 ◽  
Vol 955-959 ◽  
pp. 30-33
Author(s):  
Ling Liu ◽  
Xiao Jun Zhang ◽  
Jian Zhou Liu
Keyword(s):  
Congo Red ◽  
Vinyl Pyrrolidone ◽  
Infrared Spectrometry ◽  
Facile Synthesis ◽  
X Ray ◽  
One Step ◽  
Ft Ir ◽  
Electron Microscopes ◽  
Poly Vinyl Pyrrolidone ◽  
Scanning Electron Microscopes

A facile one-step solvothermal route was developed to synthesize NiO nanoflowers (200-300 nm in diameter) with the introduction of poly(vinyl-pyrrolidone)/stearic acid (PVP/SA) mixture. The product was characterized by X-ray powder diffraction (XRD), field-emission scanning electron microscopes (FESEM), Fourier transform infrared spectrometry (FT-IR), Thermal gravimetric analyze (TGA), and Brunauer-Emmett-Teller (BET). The mesoporous NiO nanoflowers showed an excellent adsorption capacity for organic pollutants (Congo red) from waste water (about 56 mg Congo red per g NiO).

scholarly journals Synthesis of hydroxylated group IV metal oxides inside hollow graphitised carbon nanofibers: nano-sponges and nanoreactors for enhanced decontamination of organophosphates

2018 ◽  
Vol 6 (41) ◽  
pp. 20444-20453 ◽  
Author(s):  
Maxwell A. Astle ◽  
Graham A. Rance ◽  
Michael W. Fay ◽  
Stuart Notman ◽  
Mark R. Sambrook ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Carbon Nanofibers ◽  
Catalytic Properties ◽  
Group Iv ◽  
Oxide Nanostructures ◽  
Metal Oxide Nanostructures

The enhanced catalytic properties of hydroxylated group IV metal oxide nanostructures confined within hollow graphitised carbon nanofibers has been demonstrated.

Formation of Protein−Metal Oxide Nanostructures by the Sonochemical Method:  Observation of Nanofibers and Nanoneedles

Langmuir ◽  
2007 ◽  
Vol 23 (20) ◽  
pp. 10342-10347 ◽  
Author(s):  
Christopher E. Bunker ◽  
Kyle C. Novak ◽  
Elena A. Guliants ◽  
Barbara A. Harruff ◽  
M. Jaouad Meziani ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Sonochemical Method ◽  
Oxide Nanostructures ◽  
Metal Oxide Nanostructures

Analysis on Microstructure of Laser Brazing Diamond Grits with a Ni-Based Filler Alloy

2010 ◽  
Vol 97-101 ◽  
pp. 3879-3883 ◽  
Author(s):  
Zhi Bo Yang ◽  
Jiu Hua Xu ◽  
Ai Ju Liu
Keyword(s):  
Active Element ◽  
Steel Substrate ◽  
Parameters Optimization ◽  
Interfacial Region ◽  
Filler Alloy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cross Diffusion ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes

Brazing diamond grits onto steel substrate using a Ni-based filler alloy was carried out via laser beam in an argon atmosphere. The microstructure of the interfacial region among the Diamond grits and the filler layer were investigated by means of scanning electron microscopes (SEM), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS). Meanwhile, the formation mechanism of carbide layers was discussed. All the results indicated that the active element chromium in the Ni-based alloy concentrated preferentially to the surface of the grits to form a chromium-rich layer, and the hard joint between the alloy and the steel substrate is established through a cross-diffusion of iron and Ni-based alloy through parameters optimization.

Pulsed laser deposition of metal oxide nanostructures for highly sensitive gas sensor applications

2016 ◽  
Vol 236 ◽  
pp. 978-987 ◽  
Author(s):  
Joni Huotari ◽  
Ville Kekkonen ◽  
Tomi Haapalainen ◽  
Martin Leidinger ◽  
Tilman Sauerwald ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Pulsed Laser Deposition ◽  
Gas Sensor ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Sensor Applications ◽  
Oxide Nanostructures ◽  
Highly Sensitive ◽  
Metal Oxide Nanostructures
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