49 Result(s)
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Article
Polypyrimidine/SWCNTS composite comprising Pt nanoparticles: Possible electrocatalyst for fuel cell
The poly(9,9-dioctyl fluorine-alt-2-amino-4,6-pyrimidine) (oligomer) is used as an effective dispersant for single walled carbon nanotubes (SWCNTs) and generates stable SWCNTs hybrid after elimination of the e...
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Article
Highly efficient visible light mediated azo dye degradation through barium titanate decorated reduced graphene oxide sheets
This study investigates BaTiO3 decorated reduced graphene oxide sheets as a potential visible light active catalyst for dye degradation (Rhodamine B). The composites were prepared through conventional hydrotherma...
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Article
Catalytic activities of platinum nanotubes: a density functional study
In this work we investigate the catalytic properties of platinum nanotubes using density functional theory based calculations. In particular, we study the dissociation of hydrogen and oxygen molecules as well ...
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Article
Preparation of NiO nanoparticles from Ni(OH)2·NiCO3·4H2O precursor by mechanical activation
A mechanical activation process was introduced as a facile method for producing nickel oxide nanopowders. The precursor compound Ni(OH)2·NiCO3·4H2O was synthesized by chemical precipitation. The precursor was mil...
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Article
Carbon nanotube/poly(vinyl alcohol) fibers with a sheath-core structure prepared by wet spinning
A method for manufacturing sheath-core structured fibers was developed using wet spinning techniques. The core portion of a fiber was prepared using a carbon nanotube (CNT) solution while the sheath used a fib...
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Article
Sensitized photocatalytic oxidation of chrome brown on TiO2
Sensitized photocatalytic oxidation of chrome brown azodye on TiO2under the effect of natural light at elevated oxygen pressures is investigated. It is shown that in the presence of dissolved oxygen, the reaction...
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Chapter
5 Structure and Reactivity of Transition Metal Chalcogenides toward the Molecular Oxygen Reduction Reaction
Research in low temperature fuel cell reactions has mainly focused on the study of platinum, and/or platinum based materials.1-23 These studies have also been aimed at understanding the fundamentals of the ele...
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Article
Study of photochemical and sonochemical processes efficiency for degradation of dyes in aqueous solution
The degradation of two commercially available dyestuffs (C.I. Reactive Black 5 and C.I. Disperse Orange 25) by ultraviolet radiation (UV), ultrasonic irradiation (US), UV/H2O2 and US/H2O2 processes was investigat...
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Article
Synthesis of TiO2 nano powder by the sol-gel method and its use as a photocatalyst
In this work the titanium dioxide powder was prepared by the optimized and simple Sol-Gel method and then characterized. The gelling pH was set to values of 3 (TiO2-A), 7 (TiO2-N) and 9 (TiO2-B) to observe the ef...
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Article
Preparation of platinum-doped hollow spheres and their electrocatalytic activity in water electrolysis
Pure TiO2 hollow spheres were prepared by using poly(styrene-methacrylic acid) latex particles as template; thereafter, titania hollow spheres were coated by platinum with an appropriate amount of choloroplatinic...
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Article
Optical characterization of sol gel TiO2 monoliths doped with Brilliant Green
Amorphous titanium dioxide monoliths doped with brilliant green (BG) were synthesized by the sol-gel process. The optical properties of the monoliths were characterized by Photoacoustic Spectroscopy and Photol...
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Chapter
Nanotubes, Nanofibers and Nanowires as Supports for Catalysts
The use of nanotechnology towards improving clean energy solutions is very important. There is a growing awareness that nanotechnology will have a profound impact on energy generation, storage, and utilization...
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Article
The effect of nanosized titania-silica film composition on the photostability of adsorbed methylene blue dye
The effect of nanosized porous films (average density 10 g/m2) of TiO2. TiO2/SiO2, and SiO2 on the photostability of adsorbed methylene blue (MB) dye during UV irradiation in air was investigated by optical spect...
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Article
Influence of Zn(II) adsorption on the photocatalytic activity and the production of H2O2 over irradiated TiO2
The photocatalytic activity of semiconductor oxides, in particular TiO2 powders or colloids, is a complex function of bulk (light absorption and scattering, charge carrier mobility and recombination rate) and sur...
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Article
Foreword
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Article
Photoelectrochemical characterisation of thermal and particulate titanium dioxide electrodes
The photoelectrocatalytic performance of thermal and particulate TiO2 films on Ti electrode substrates has been studied by photovoltammetry and bulk photoelectrolysis. The thermal TiO2 film electrodes were prepar...
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Article
Radiolysis of azo dyes in aqueous solution: Apollofix Red
The UV-Vis absorption spectra of azo dyes in aqueous solutions strongly overlap with the spectra of intermediates produced in the reaction of these dyes with the intermediates of water radiolysis. This overlap...
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Article
Photocatalytic Degradation of Organic Pollutants Under Visible Light Irradiation
Several TiO2-based photocatalytic systems that have considerable visible light response have been developed, such as the photodegradation of organic pollutants on sensitized TiO2 by visible light, construction of...
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Article
Photocatalytic and electrochemically assisted photocatalytic oxidation of formic acid on TiO2 films under UVA and UVB irradiation
Titanium dioxide (TiO2) photocatalysis is a possible alternative/complementary technology for water purification. Attempts to increase the overall efficiency of the process include using higher energy UV to gain ...
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Article
Mass transfer and photocatalytic degradation of leather dye using TiO2/UV
The global process of heterogeneous photocatalytic oxidation can be described in consecutive steps of mass transfer, adsorption, reaction and desorption. Although such a deseription normally only considers the...
