Photocatalytic Activity of Titanium Oxide Nano-Networks Fabricated through Organogel Route Using L-Isoleucine-Based Gelator

Suzuki, Masahiro; Kikuchi, Masahiro; Hanabusa, Kenji

doi:10.2115/fiber.70.213

Cited by 1 publication

(3 citation statements)

References 32 publications

(42 reference statements)

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“…The sol-gel polymerization in 1,4-dioxane gel gave a TiO 2 nanowire (not nanotube). We have reported that the TiO 2 nanowires were fabricated by using L-isoleucine gelator [39]. Although the l -isoleucine gelator formed the self-assembled nanofibers with a diameter of several tens of nanometers in the dioxane gel, the inner diameter of the TiO 2 nanotubes obtained was 1–10 nanometers before calcination.…”

Section: Resultsmentioning

confidence: 99%

“…It is well-known that a TiO 2 changes its crystalline structure in calcination temperatures [29,39]. The change in the crystalline structure of the TiO 2 nanotubes during calcination was evaluated by X-ray diffraction (XRD) analysis.…”

Section: Resultsmentioning

confidence: 99%

“…Shinkai and co-workers are a pioneer in the template-synthesis of metal oxides using low-molecular-weight gelators [30,31]. The nanotubes and nanofibers of SiO 2 , TiO 2 , ZrO 2 , Ta 2 O 5 , Nb 2 O 5 , and vanadium oxide have been successfully fabricated using gelators [11,32,33,34,35,36,37,38,39,40].…”

Section: Introductionmentioning

confidence: 99%

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Metal Oxide/TiO2 Hybrid Nanotubes Fabricated through the Organogel Route

Suzuki

Tanaka

Kato

et al. 2017

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Titanium dioxide (TiO2) nanotube and its hybrid nanotubes (with various metal oxides such as Ta2O5, Nb2O5, ZrO2, and SiO2) were fabricated by the sol-gel polymerization in the ethanol gels formed by simple l-lysine-based organogelator. The self-assembled nanofibers (gel fibers) formed by the gelator functioned as a template. The different calcination temperatures gave TiO2 nanotubes with various crystalline structures; e.g., anatase TiO2 nanotube was obtained by calcination at 600 °C, and rutile TiO2 nanotube was fabricated at a calcination temperature of 750 °C. In the metal oxide/TiO2 hybrid nanotubes, the metal oxide species were uniformly dispersed in the TiO2 nanotube, and the percent content of metal oxide species was found to correspond closely to the feed ratio of the raw materials. This result indicated that the composition ratio of hybrid nanotubes was controllable by the feed ratio of the raw materials. It was found that the metal oxide species inhibited the crystalline phase transition of TiO2 from anatase to rutile. Furthermore, the success of the hybridization of other metal oxides (except for TiO2) indicated the usefulness of the organogel route as one of the fabrication methods of metal oxide nanotubes.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%