News tagged with photocatalyst
Photocatalysis
In chemistry, photocatalysis is the acceleration of a photoreaction in the presence of a catalyst. In catalysed photolysis, light is absorbed by an adsorbed substrate. In photogenerated catalysis, the photocatalytic activity (PCA) depends on the ability of the catalyst to create electron–hole pairs, which generate free radicals (hydroxyl radicals: ·OH) able to undergo secondary reactions. Its comprehension has been made possible ever since the discovery of water electrolysis by means of the titanium dioxide. Commercial application of the process is called advanced oxidation process (AOP). There are several methods of achieving AOP's, that can but do not necessarily involve TiO2 or even the use of UV light. Generally the defining factor is the production and use of the hydroxyl radical.
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Discovery of an Unexpected Boost for Solar Water-Splitting Cells
(PhysOrg.com) -- A research team from Northeastern University and the National Institute of Standards and Technology has discovered, serendipitously, that a residue of a process used to build arrays of titania ...
Nanotechnology / Nanomaterials
Apr 22, 2009 |
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Water-splitting Photocatalyst Brought to Light
(PhysOrg.com) -- To produce "green" fuels, some scientists are looking for a little help from above. Sunlight is the key ingredient in photocatalytic water splitting, a process that breaks down water into ...
Jun 16, 2010 |
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High-purity hydrogen generated from a single device
(PhysOrg.com) -- There are many ways to generate hydrogen, such as water electrolysis and steam reforming of gas, but the hydrogen produced by these methods tends to be combined with other byproduct and residual ...
Oct 07, 2011 |
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A dash of disorder yields a very efficient photocatalyst
(PhysOrg.com) -- A little disorder goes a long way, especially when it comes to harnessing the sun’s energy. Scientists from the U.S. Department of Energy’s Lawrence Berkeley National Laboratory ...
Nanotechnology / Nanomaterials
Jan 28, 2011 |
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Solar rays could replace petroleum fuels, research shows
(PhysOrg.com) -- Alternative fuel sources for cars may have a glowing future as a Kansas State University graduate student is working to replace petroleum fuels with ones made from sunlight.
Sep 13, 2011 |
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New method to clean and treat polluted water for extraction of chemicals
Scientists in Poland have discovered that it is easy to clean and treat polluted water for extraction of valuable chemicals, such as those used in the production of drugs. The upshot of this is that the use ...
Feb 24, 2012 |
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Accolade for solar-hydrogen project
A research project that aims to produce hydrogen on an environmentally friendly and cost-effective basis by using energy from the sun has won a prestigious E.ON research award.
Technology / Energy & Green Tech
May 18, 2009 |
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Titanium dioxide film enhances the sun's natural disinfection power
The world population is estimated to be seven billion and all these mouths need feeding. With fears about overfishing and the sustainability of fish stocks in our seas fish farming is becoming big business. As with all farming ...
Jan 12, 2012 |
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NJIT professor develops biologically-inspired catalysis active, yet inert materials
NJIT Associate Professor Sergiu M. Gorun is leading a research team to develop biologically-inspired catalysis active, yet inert, materials. The work is based on organic catalytic framework made sturdy by the replacement ...
Apr 19, 2011 |
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