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Langmuir

Title:		Fabrication of Photocatalytic Paper Using TiO(2) Nanoparticles Confined in Hollow Silica Capsules
Author(s):		Fujiwara K; Kuwahara Y; Sumida Y; Yamashita H;
Address:		"Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University , 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan. Paper Technology Center, Ehime Institute of Industrial Technology , 127 Mendori-cho, Shikokuchuo, Ehime 799-0113, Japan. Unit of Elements Strategy Initiative for Catalysts & Batteries (ESICB), Kyoto University , Katsura, Kyoto 615-8520, Japan"
Journal Title:		Langmuir
Year:		2017
Volume:		20161230
Issue:		1
Page Number:		288 - 295
DOI:		10.1021/acs.langmuir.6b04003
ISSN/ISBN:		1520-5827 (Electronic) 0743-7463 (Linking)
Abstract:		"TiO(2) nanoparticles (NPs) encapsulated in hollow silica spheres (TiO(2)@HSSs) show a shielding-effect that can insulate photocatalytically active TiO(2) NPs from the surrounding environment and thus prohibit the self-degradation of organic support materials under ultraviolet (UV)-light irradiation. In this study, photocatalytically active papers were fabricated by combining TiO(2)@HSS and cellulose fibers, and their photocatalytic activities and durability under UV-light irradiation were examined. The yolk-shell nanostructured TiO(2)@HSS, which has an ample void space between inner TiO(2) NPs and an outer silica shell, was synthesized using a facile single-step method utilizing an oil-in-water microemulsion as an organic template. The thus-prepared TiO(2)@HSS particles were deposited onto a cellulose paper either by the chemical adhesion process via ionic bonding or by the physical adhesion process using a dual polymer system. The obtained paper containing TiO(2)@HSS particles with high air permeability exhibited a higher photocatalytic activity in the photocatalytic decomposition of volatile organic compounds than unsupported powdery TiO(2)@HSS particles because of the uniform dispersion on the paper with a reticular fiber network. In addition, the paper was hardly damaged under UV-light irradiation, whereas the paper containing naked TiO(2) NPs showed a marked deterioration with a considerably decreased strength, owing to the ability of the silica shell to prevent direct contact between TiO(2) and organic fibers. This study can offer a promising method to fabricate photocatalytically active papers with a photoresistance property available for real air cleaning"
Keywords:
Notes:		"PubMed-not-MEDLINEFujiwara, Kensei Kuwahara, Yasutaka Sumida, Yuki Yamashita, Hiromi eng Research Support, Non-U.S. Gov't 2016/12/23 Langmuir. 2017 Jan 10; 33(1):288-295. doi: 10.1021/acs.langmuir.6b04003. Epub 2016 Dec 30"