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

Title
Enhanced visible-light photocatalytic properties of Fe3+-grafted N-doped TiO2 nanoporous spheres
Authors
이완인
Keywords
TiO2 Nitrogen-doped TiO2 Fe3+-grafted TiO2 sphere Photocatalyst Visible-light 2-Propanol Acetaldehyde SiO2 binder CO2 evolution
Issue Date
2013
Publisher
APPLIED CATALYSIS B-ENVIRONMENTAL
Series/Report no.
APPLIED CATALYSIS B-ENVIRONMENTAL ; Vol142-143 Startpage 458 Endpage 464
Abstract
Monodispersed 250 nm-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 visiblelight 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 ofthe Fe3+/NTiO2 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 20 wt% 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%.
URI
http://dx.doi.org/10.1016/j.apcatb.2013.05.067
http://dspace.inha.ac.kr/handle/10505/33152
ISSN
0926-3373
Appears in Collections:
College of Natural Science(자연과학대학) > Chemistry (화학) > Journal Papers, Reports(화학 논문, 보고서)
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