Enhanced visible-light photocatalytic properties of Fe3+-grafted N-doped TiO2 nanoporous spheres

Sher Bahadur Rawal; Hark Jin Kim; Wan In Lee

doi:10.1016/j.apcatb.2013.05.067

Enhanced visible-light photocatalytic properties of Fe³⁺-grafted N-doped TiO₂ nanoporous spheres

Sher Bahadur Rawal, Hark Jin Kim, Wan In Lee

Inha University

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

Monodispersed 250nm-sized TiO₂ sphere (TiO₂ SP) with large internal surface area was successfully employed in fabricating the Fe³⁺-grafted nitrogen-doped TiO₂ (Fe³⁺/N-TiO₂), exhibiting ultra-high visible-light photocatalytic efficiency. In evolving CO₂ from the gaseous 2-propanol (IP) and acetaldehyde, the prepared Fe³⁺/N-TiO₂ SP demonstrated twice of catalytic activity, comparing with the nanoparticle (NP)-based Fe³⁺/N-TiO₂. Consequently, the optimized Fe³⁺/N-TiO₂ SP exhibited 5.0-7.3 times higher efficiency than the bare N-TiO₂ NP. The instability of photocatalytic activity is a well-known drawback of the Fe³⁺/N-TiO₂ system, caused by the inherent weakness of Fe³⁺ ions from the chemical attacks. Herein, however, it was found that SP system with large internal surface is remarkably advantageous for protecting the grafted Fe³⁺ ions. With mixing of 20wt% silica binder, which is regarded to be a typical dosage for application, photocatalytic efficiency of the Fe³⁺/N-TiO₂ SP was decreased by only 21-25%, whereas that of the NP-based sample was reduced by 73-80%.

Original language	English
Pages (from-to)	458-464
Number of pages	7
Journal	Applied Catalysis B: Environmental
Volume	142-143
DOIs	https://doi.org/10.1016/j.apcatb.2013.05.067
State	Published - Oct 2013

Bibliographical note

Funding Information:
This work has been supported by the National Research Foundation of Korea (Project No. 2011-0028981 ), and Korea Center for Artificial Photosynthesis (KCAP) funded by the Ministry of Education, Science, and Technology ( NRF-2012M1A2A2671781 ).

Keywords

2-Propanol
Acetaldehyde
CO evolution
Fe-grafted
Nitrogen-doped TiO
Photocatalyst
SiO binder
TiO
TiO sphere
Visible-light

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10.1016/j.apcatb.2013.05.067

Cite this

@article{94462ca8f01e488389998e781bdc959e,

title = "Enhanced visible-light photocatalytic properties of Fe3+-grafted N-doped TiO2 nanoporous spheres",

abstract = "Monodispersed 250nm-sized TiO2 sphere (TiO2 SP) with large internal surface area was successfully employed in fabricating the Fe3+-grafted nitrogen-doped TiO2 (Fe3+/N-TiO2), exhibiting ultra-high visible-light photocatalytic efficiency. In evolving CO2 from the gaseous 2-propanol (IP) and acetaldehyde, the prepared Fe3+/N-TiO2 SP demonstrated twice of catalytic activity, comparing with the nanoparticle (NP)-based Fe3+/N-TiO2. Consequently, the optimized Fe3+/N-TiO2 SP exhibited 5.0-7.3 times higher efficiency than the bare N-TiO2 NP. The instability of photocatalytic activity is a well-known drawback of the Fe3+/N-TiO2 system, caused by the inherent weakness of Fe3+ ions from the chemical attacks. Herein, however, it was found that SP system with large internal surface is remarkably advantageous for protecting the grafted Fe3+ ions. With mixing of 20wt% silica binder, which is regarded to be a typical dosage for application, photocatalytic efficiency of the Fe3+/N-TiO2 SP was decreased by only 21-25%, whereas that of the NP-based sample was reduced by 73-80%.",

keywords = "2-Propanol, Acetaldehyde, CO evolution, Fe-grafted, Nitrogen-doped TiO, Photocatalyst, SiO binder, TiO, TiO sphere, Visible-light",

author = "Rawal, {Sher Bahadur} and Kim, {Hark Jin} and Lee, {Wan In}",

note = "Funding Information: This work has been supported by the National Research Foundation of Korea (Project No. 2011-0028981 ), and Korea Center for Artificial Photosynthesis (KCAP) funded by the Ministry of Education, Science, and Technology ( NRF-2012M1A2A2671781 ).",

year = "2013",

month = oct,

doi = "10.1016/j.apcatb.2013.05.067",

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journal = "Applied Catalysis B: Environmental",

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T1 - Enhanced visible-light photocatalytic properties of Fe3+-grafted N-doped TiO2 nanoporous spheres

AU - Rawal, Sher Bahadur

AU - Kim, Hark Jin

AU - Lee, Wan In

N1 - Funding Information: This work has been supported by the National Research Foundation of Korea (Project No. 2011-0028981 ), and Korea Center for Artificial Photosynthesis (KCAP) funded by the Ministry of Education, Science, and Technology ( NRF-2012M1A2A2671781 ).

PY - 2013/10

Y1 - 2013/10

N2 - Monodispersed 250nm-sized TiO2 sphere (TiO2 SP) with large internal surface area was successfully employed in fabricating the Fe3+-grafted nitrogen-doped TiO2 (Fe3+/N-TiO2), exhibiting ultra-high visible-light photocatalytic efficiency. In evolving CO2 from the gaseous 2-propanol (IP) and acetaldehyde, the prepared Fe3+/N-TiO2 SP demonstrated twice of catalytic activity, comparing with the nanoparticle (NP)-based Fe3+/N-TiO2. Consequently, the optimized Fe3+/N-TiO2 SP exhibited 5.0-7.3 times higher efficiency than the bare N-TiO2 NP. The instability of photocatalytic activity is a well-known drawback of the Fe3+/N-TiO2 system, caused by the inherent weakness of Fe3+ ions from the chemical attacks. Herein, however, it was found that SP system with large internal surface is remarkably advantageous for protecting the grafted Fe3+ ions. With mixing of 20wt% silica binder, which is regarded to be a typical dosage for application, photocatalytic efficiency of the Fe3+/N-TiO2 SP was decreased by only 21-25%, whereas that of the NP-based sample was reduced by 73-80%.

AB - Monodispersed 250nm-sized TiO2 sphere (TiO2 SP) with large internal surface area was successfully employed in fabricating the Fe3+-grafted nitrogen-doped TiO2 (Fe3+/N-TiO2), exhibiting ultra-high visible-light photocatalytic efficiency. In evolving CO2 from the gaseous 2-propanol (IP) and acetaldehyde, the prepared Fe3+/N-TiO2 SP demonstrated twice of catalytic activity, comparing with the nanoparticle (NP)-based Fe3+/N-TiO2. Consequently, the optimized Fe3+/N-TiO2 SP exhibited 5.0-7.3 times higher efficiency than the bare N-TiO2 NP. The instability of photocatalytic activity is a well-known drawback of the Fe3+/N-TiO2 system, caused by the inherent weakness of Fe3+ ions from the chemical attacks. Herein, however, it was found that SP system with large internal surface is remarkably advantageous for protecting the grafted Fe3+ ions. With mixing of 20wt% silica binder, which is regarded to be a typical dosage for application, photocatalytic efficiency of the Fe3+/N-TiO2 SP was decreased by only 21-25%, whereas that of the NP-based sample was reduced by 73-80%.

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