scholarly journals Synthesis of nano-sized tungsten oxide particles encapsulated in a hollow silica sphere and their photocatalytic properties for decomposition of acetic acid using Pt as a co-catalyst

RSC Advances ◽  
2020 ◽  
Vol 10 (26) ◽  
pp. 15360-15365
Author(s):  
Takashi Harada ◽  
En Yagi ◽  
Shigeru Ikeda
Keyword(s):  
Acetic Acid ◽  
Tungsten Oxide ◽  
Silica Sphere ◽  
Photocatalytic Properties ◽  
Hollow Silica ◽  
Co Catalyst ◽  
Oxide Particles

We present a procedure for the synthesis of WO3 nanoparticles encapsulated in a hollow silica sphere, and their unique photocatalytic properties.

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.

Physical and Biophysical Characteristics of Nanoscale Tungsten Oxide Particles and Their Interaction with Human Genomic DNA

2011 ◽  
Vol 11 (6) ◽  
pp. 4659-4666 ◽  
Author(s):  
Vijay Bhooshan Kumar ◽  
Clara Ermine Sawian ◽  
Dambarudhar Mohanta ◽  
Shashi Baruah ◽  
NashreenS. Islam
Keyword(s):  
Tungsten Oxide ◽  
Genomic Dna ◽  
Oxide Particles ◽  
Human Genomic ◽  
Human Genomic Dna

scholarly journals Small Nanosized Oxygen-Deficient Tungsten Oxide Particles: Mechanistic Investigation with Controlled Plasma Generation in Water for Their Preparation

ACS Omega ◽  
2017 ◽  
Vol 2 (8) ◽  
pp. 5104-5110 ◽  
Author(s):  
Yohei Ishida ◽  
Shingo Motono ◽  
Wataru Doshin ◽  
Tomoharu Tokunaga ◽  
Hiroki Tsukamoto ◽  
...  
Keyword(s):  
Tungsten Oxide ◽  
Plasma Generation ◽  
Mechanistic Investigation ◽  
Oxide Particles

Aqueous phase conversion of CO2 into acetic acid over thermally transformed MIL-88B

2021 ◽  
Author(s):  
Waqar Ahmad ◽  
Paramita Koley ◽  
Swarit Dwivedi ◽  
Abhijit Shrotri ◽  
Akshat Tanksale
Keyword(s):  
Acetic Acid ◽  
Aqueous Phase ◽  
Carbon Emissions ◽  
Active Sites ◽  
Catalyst Recycling ◽  
Efficient Catalyst ◽  
Co Catalyst ◽  
Net Zero ◽  
Significant Difference ◽  
Zero Carbon

Abstract Sustainable production of acetic acid (AA) is a high priority due to its high global manufacturing capacity and numerous applications. Currently it is predominantly synthesized via carbonylation of methanol, in which both the reactants are fossil-derived. CO2 transformation into AA is highly desirable to achieve net zero carbon emissions, but significant challenges remain to achieve this efficiently. Herein, we report a heterogeneous catalyst, thermally transformed MIL-88B with Fe0 and Fe3O4 dual active sites, for highly selective AA formation via methanol hydrocarboxylation. This efficient catalyst showed high AA yield (590.1 mmol/gcat.L) with 81.7% selectivity at 150°C in aqueous phase using LiI as a co-catalyst. The reaction is believed to proceed via formic acid intermediate. No significant difference in AA yield and selectivity was noticed during catalyst recycling study up to five cycles. This work scalable and industrially relevant for CO2 utilisation to reduce carbon emissions, especially if green methanol and green hydrogen are used.

Cylindrical stacks and flower-like tungsten oxide microstructures: Controllable synthesis and photocatalytic properties

2014 ◽  
Vol 40 (3) ◽  
pp. 4969-4973 ◽  
Author(s):  
Qiu-Hong Li ◽  
Li-Min Wang ◽  
De-Qing Chu ◽  
Xiao-Zhong Yang ◽  
Zhi-Yu Zhang
Keyword(s):  
Tungsten Oxide ◽  
Photocatalytic Properties ◽  
Controllable Synthesis
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