A novel class of photocatalytic coating capable of degrading bacterial and chemical contaminants in the presence of visible sunlight wavelengths was produced by depositing a stable photocatalytic TiO2 film on the internal lumen of glass... more
A novel class of photocatalytic coating capable of degrading bacterial and chemical contaminants in the
presence of visible sunlight wavelengths was produced by depositing a stable photocatalytic TiO2 film on
the internal lumen of glass bottles via a sol–gel method. This coating was prepared in either undoped form
or doped with nitrogen and/or copper to produce visible light-active TiO2 films which were annealed at
600 ◦C and were characterized by Raman and X-ray photoelectron spectroscopy. The presence of doped
and undoped TiO2 films was found to accelerate the degradation of methylene blue in the presence
of natural sunlight, while copper-doped TiO2 films were found to accelerate bacterial inactivation (of
Escherichia coli and Enterococcus faecalis) in the presence of natural sunlight.
presence of visible sunlight wavelengths was produced by depositing a stable photocatalytic TiO2 film on
the internal lumen of glass bottles via a sol–gel method. This coating was prepared in either undoped form
or doped with nitrogen and/or copper to produce visible light-active TiO2 films which were annealed at
600 ◦C and were characterized by Raman and X-ray photoelectron spectroscopy. The presence of doped
and undoped TiO2 films was found to accelerate the degradation of methylene blue in the presence
of natural sunlight, while copper-doped TiO2 films were found to accelerate bacterial inactivation (of
Escherichia coli and Enterococcus faecalis) in the presence of natural sunlight.
Research Interests: Materials Engineering, Materials Science, Materials Chemistry, Synthesis of nanoparticles, Colloids and Surfaces, and 13 morePhotocatalysts, Water Treatment, Nanomaterials, Nanoparticles, Nanotechnology, Water Pollution, Materials Science and Engineering, Photocatalysis, Surface Coatings, Waste water treatment, Titanium dioxide, Nanomaterial and photocatalysis, and TiO2 nanoparticles for water treatment
A combination of solar disinfection and photocatalysis technology offers real possibilities for removing lethal pathogenic microorganisms from drinking water. The time taken for the conventional SODIS process can be greatly reduced by... more
A
combination of solar disinfection and photocatalysis technology offers real possibilities for removing
lethal pathogenic microorganisms from drinking water. The time taken for the conventional SODIS
process can be greatly reduced by semiconductor (e.g. TiO2, ZnO, nano-heterojunctions) based
photocatalysis. This review addresses the fundamental reaction mechanism, advances in materials
synthesis and selection and recent developments in the reactor design for solar energy driven photocatalysis
using titanium dioxide. The major advantage of using photo-reactors is that they enhance disinfection by
increasing photon flux into the photocatalyst. Other major factors affecting such efficiency of solarbased
photocatalysis such as the illuminated volume/total volume ratio, catalyst load and flow rate, are
discussed in detail. The significance of using immobilised catalysts over the catalyst powder in slurries is
also highlighted. It is noted that, despite encouraging early field studies, the commercialisation and
mass production of solar photocatalysis systems remains highly challenging. Recommendations for
future directions for addressing issues such as mass transfer, requirement of a standard test method,
photo-reactors design and visible light absorption by TiO2 coatings are also discussed
combination of solar disinfection and photocatalysis technology offers real possibilities for removing
lethal pathogenic microorganisms from drinking water. The time taken for the conventional SODIS
process can be greatly reduced by semiconductor (e.g. TiO2, ZnO, nano-heterojunctions) based
photocatalysis. This review addresses the fundamental reaction mechanism, advances in materials
synthesis and selection and recent developments in the reactor design for solar energy driven photocatalysis
using titanium dioxide. The major advantage of using photo-reactors is that they enhance disinfection by
increasing photon flux into the photocatalyst. Other major factors affecting such efficiency of solarbased
photocatalysis such as the illuminated volume/total volume ratio, catalyst load and flow rate, are
discussed in detail. The significance of using immobilised catalysts over the catalyst powder in slurries is
also highlighted. It is noted that, despite encouraging early field studies, the commercialisation and
mass production of solar photocatalysis systems remains highly challenging. Recommendations for
future directions for addressing issues such as mass transfer, requirement of a standard test method,
photo-reactors design and visible light absorption by TiO2 coatings are also discussed