Gasochromic effect in colloidal nanoparticles of tungsten oxide dihydrate synthesized via a simple anodizing method

2015 ◽  
Vol 132 ◽  
pp. 329-336 ◽  
Author(s):  
M. Ranjbar ◽  
A. Heidari Fini ◽  
H. Kalhori ◽  
P. Kameli ◽  
H. Salamati
Keyword(s):  
Tungsten Oxide ◽  
Colloidal Nanoparticles

Physical-mechanical characteristics of composite based on polyimide matrix filled with tungsten oxide

2019 ◽  
pp. 15-25
Author(s):  
V. I. Pavlenko ◽  
◽  
G. G. Bondarenko ◽  
N. I. Cherkashina ◽  
◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Mechanical Characteristics ◽  
Polyimide Matrix

PERFORMANCE OF TUNGSTEN OXIDE DOPED TITANIA via SOL-GEL PROCESS FOR PHOTO-DEGRADATION OF TRANS-CINNAMIC ACID

2016 ◽  
Vol 24 (1) ◽  
pp. 75-86
Author(s):  
Y.N. Tan ◽  
◽  
A.H.A. Malek ◽  
M.Z.A. Malek ◽  
M.T. Zainuddin ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Cinnamic Acid ◽  
Sol Gel ◽  
Photo Degradation ◽  
Sol Gel Process ◽  
Doped Titania

scholarly journals Tungsten Oxide Based Sensor for Oxygen Detection

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 952 ◽  
Author(s):  
Wangi Sari ◽  
Simon Leigh ◽  
James Covington
Keyword(s):  
Metal Oxide ◽  
Linear Relationship ◽  
Tungsten Oxide ◽  
Spin Coating ◽  
Low Temperatures ◽  
Oxygen Sensor ◽  
High Response ◽  
Humid Air ◽  
Dry Air ◽  
Oxygen Detection

In this paper we report on the development tungsten oxide based chemiresistive sensors for the monitoring of oxygen at low temperatures (T ≤ 400 °C) in dry and humid air. The sensors were deposited onto alumina substrate by a combination of spin coating and a photolithographic process to define the sensing area. Our results show that the sensors comply with a linear relationship over a 0 to 20% concentration range, with a high response towards oxygen. The highest response was observed at 350 °C (ΔR/Ra = 7.8) in humid and in dry air (ΔR/Ra = 18). This result is a significant improvement over our previous experiments and we believe to take the concept of a metal-oxide based oxygen sensor a step closer.

SERS study of the adsorption of 2-mercaptobenzoxazole on gold colloidal nanoparticles

2009 ◽  
Vol 924-926 ◽  
pp. 559-561 ◽  
Author(s):  
Barbara Pergolese ◽  
Maurizio Muniz-Miranda ◽  
Adriano Bigotto
Keyword(s):  
Colloidal Nanoparticles

scholarly journals Evolution of reduction process from tungsten oxide to ultrafine tungsten powder via hydrogen

2021 ◽  
Vol 40 (1) ◽  
pp. 171-177
Author(s):  
Yue Wang ◽  
Ben Fu Long ◽  
Chun Yu Liu ◽  
Gao An Lin
Keyword(s):  
Surface Morphology ◽  
Tungsten Oxide ◽  
Tungsten Powder ◽  
Reduction Process ◽  
Chemical Vapor ◽  
Transition Process ◽  
Vapor Transport ◽  
Fibrous Structure ◽  
Chemical Vapor Transport ◽  
Oxide Particles

Abstract Herein, the evolution of reduction process of ultrafine tungsten powder in industrial conditions was investigated. The transition process of morphology and composition was examined via SEM, XRD, and calcination experiments. The results show that the reduction sequence of WO2.9 was WO2.9 → WO2.72 → WO2 → W on the surface, but WO2.9 → WO2 → W inside the oxide particles. With the aid of chemical vapor transport of WO x (OH) y , surface morphology transformed into rod-like, star-shaped cracking, floret, irregularly fibrous structure, and finally, spherical tungsten particles.

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