Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Screening tests for the evaluation of nanoparticle titania photocatalysts
AU - Thompson, K.
AU - Goodall, J.
AU - Kellici, S.
AU - Mattinson, J.A.
AU - Egerton, T.A.
AU - Rehman, I.
AU - Darr, J.A.
PY - 2009
Y1 - 2009
N2 - BACKGROUND: Nano-sized titanium dioxide has potential as a photocatalyst, and doped variants may have different photocatalytic properties. Nano-titanias with a wide range of dopants and compositions can be prepared using continuous hydrothermal flow synthesis (CHFS), but when many samples are made, a large-scale screening test is required to investigate their properties. A range of doped nano-titanias were prepared using a CHFS route, and investigated as powders using a range of photocatalytic test methods. These tests included decolourization of methylene blue (in the presence of oxygen), partial oxidation of a simple alcohol (propan-2-ol) and the degradation of aqueous solutions of dichloroacetic acid. The practicality of the tests for large-scale screening was considered, and the test results were cross-correlated to see if any of them gave similar ranking for activity of the photocatalysts. RESULTS: Two of the tests, namely DCA degradation and propan-2-ol, gave similar rank ordering for the nanopowders, while the MB decolourization results did not suggest a strong correlation with any other test. The addition of metal dopants was observed to produce varying results between different dopants and tests. CONCLUSIONS: Two of the tests, DCA degradation and MB decolourization in visible light, were recommended for further use as screening tests. © 2009 Society of Chemical Industry.
AB - BACKGROUND: Nano-sized titanium dioxide has potential as a photocatalyst, and doped variants may have different photocatalytic properties. Nano-titanias with a wide range of dopants and compositions can be prepared using continuous hydrothermal flow synthesis (CHFS), but when many samples are made, a large-scale screening test is required to investigate their properties. A range of doped nano-titanias were prepared using a CHFS route, and investigated as powders using a range of photocatalytic test methods. These tests included decolourization of methylene blue (in the presence of oxygen), partial oxidation of a simple alcohol (propan-2-ol) and the degradation of aqueous solutions of dichloroacetic acid. The practicality of the tests for large-scale screening was considered, and the test results were cross-correlated to see if any of them gave similar ranking for activity of the photocatalysts. RESULTS: Two of the tests, namely DCA degradation and propan-2-ol, gave similar rank ordering for the nanopowders, while the MB decolourization results did not suggest a strong correlation with any other test. The addition of metal dopants was observed to produce varying results between different dopants and tests. CONCLUSIONS: Two of the tests, DCA degradation and MB decolourization in visible light, were recommended for further use as screening tests. © 2009 Society of Chemical Industry.
KW - Methylene blue
KW - Photocatalysis
KW - Screening
KW - Titania
KW - Visible light
KW - Aqueous solutions
KW - Decolourization
KW - Dichloroacetic acid
KW - Flow synthesis
KW - Nano powders
KW - Nano-sized titanium dioxide
KW - Partial oxidations
KW - Photo-catalytic
KW - Photocatalytic property
KW - Rank ordering
KW - Screening tests
KW - Simple alcohols
KW - Strong correlation
KW - Test method
KW - Test results
KW - Titania photocatalyst
KW - Degradation
KW - Doping (additives)
KW - Hydrothermal synthesis
KW - Organic polymers
KW - Oxygen
KW - Photocatalysts
KW - Tantalum compounds
KW - Titanium
KW - Titanium dioxide
KW - Titanium oxides
KW - Testing
KW - 2 propanol
KW - dichloroacetic acid
KW - metal nanoparticle
KW - methylene blue
KW - titanium dioxide
KW - article
KW - continuous hydrothermal flow synthesis
KW - controlled study
KW - decolorization
KW - fluorescent lighting
KW - high throughput screening
KW - illumination
KW - intermethod comparison
KW - light
KW - nanobiotechnology
KW - photocatalysis
KW - photodegradation
KW - photooxidation
KW - process development
KW - screening test
KW - ultraviolet radiation
U2 - 10.1002/jctb.2237
DO - 10.1002/jctb.2237
M3 - Journal article
VL - 84
SP - 1717
EP - 1725
JO - Journal of Chemical Technology and Biotechnology
JF - Journal of Chemical Technology and Biotechnology
SN - 0268-2575
IS - 11
ER -