Visible light-sensitive yellow TiO{sub 2-} {sub x} N {sub x} and Fe-N co-doped Ti{sub 1-} {sub y} Fe {sub y} O{sub 2-} {sub x} N {sub x} anatase photocatalysts

Journal Article · Sun Oct 15 04:00:00 EDT 2006 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2006.05.033· OSTI ID:20902465

Rane, K S ^[1]; Mhalsiker, R ^[1]; Yin, S ^[2]; Sato, T ^[2]; Cho, Kuk ^[3]; Dunbar, E ^[3]; Biswas, Pratim ^[3]

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1. Department of Chemistry, Goa University, Panaji City, Goa 403206 (India)
2. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katachira, Aoba-ku, Sendai, Miyagi 980-8577 (Japan)
3. Environmental Engineering Science, School of Engineering and Applied Sciences, Washington University in St. Louis, One Brooking Drive, Campus Box 1180, St. Louis, MO 63130-4899 (United States)

Nitrogen substituted yellow colored anatase TiO{sub 2-} {sub x} N {sub x} and Fe-N co-doped Ti{sub 1-} {sub y} Fe {sub y} O{sub 2-} {sub x} N {sub x} have been easily synthesized by novel hydrazine method. White anatase TiO{sub 2-} {sub {delta}} and N/Fe-N-doped samples are semiconducting and the presence of ESR signals at g {approx}1.994-2.0025 supports the oxygen vacancy and g{approx}4.3 indicates Fe{sup 3+} in the lattice. TiO{sub 2-} {sub x} N {sub x} has higher conductivity than TiO{sub 2-} {sub x} and Fe/Fe-N-doped anatase and the UV absorption edge of white TiO{sub 2-} {sub x} extends in the visible region in N, Fe and Fe-N co-doped TiO{sub 2}, which show, respectively, two band gaps at {approx}3.25/2.63, {approx}3.31/2.44 and 2.8/2.44 eV. An activation energy of {approx}1.8 eV is observed in Arrhenius log resistivity vs. 1/T plots for all samples. All TiO{sub 2} and Fe-doped TiO{sub 2} show low 2-propanol photodegradation activity but have significant NO photodestruction capability, both in UV and visible regions, while standard Degussa P-25 is incapable in destroying NO in the visible region The mid-gap levels that these N and Fe-N-doped TiO{sub 2} consist may cause this discrepancy in their photocatalytic activities. - Graphical abstract: DRS of TiO{sub 2}, N/Fe-N doped TiO{sub 2}.

• OSTI ID: 20902465
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 10 Vol. 179; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
ACTIVATION ENERGY
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRON SPIN RESONANCE
EV RANGE
HYDRAZINE
IRON IONS
IRON OXIDES
NITRIDES
OXALATES
PHOTOCATALYSIS
TITANIUM OXIDES
VACANCIES
X-RAY PHOTOELECTRON SPECTROSCOPY