Induction by Visible Light of Photocatalytic Water Decontamination by Use of Powders of Nonlinear Optic Material and Visible-Light Phosphor to Generate Dispersed Ultraviolet Light

Deguchi, Seiichi; Katsuki, Ryota; Sugiura, Y.; Takeichi, Toshinori; Shibata, Naoki; Isu, Norifumi

doi:10.1252/kakoronbunshu.37.38

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…Therefore, any further experimentation will utilize P90 (or any TiO 2 powder subsequently deemed superior) as the TiO 2 starting material. "ST" series as ST-01 utilized in this study Beta plus for both water splitting [5] and purification [19] Nippon Aerosil Co., Ltd.…”

Section: Future Strategies For Enhancing Photocatalytic Water Splittimentioning

confidence: 99%

Effect of TiO2 Crystallite Diameter on Photocatalytic Water Splitting Rate

Banno¹,

Kariya²,

Isu³

et al. 2014

GSC

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The effect of (Pt-loaded)TiO2 crystallite diameter (i.e. Scherrer size) on the photocatalytic water splitting rate was investigated. (Pt-loaded)TiO2 powders with a wide range of crystallite diameters from about 16 to 45 nm with a blank region between about 23 and 41 nm were prepared by various annealing processes from an identical TiO2 powder. Water splitting experiments with these powders were carried out with methanol as an oxidizing sacrificial agent. It was found that the photocatalytic water splitting rate was sensitively affected by the crystallite diameter of the (Pt-loaded)TiO2 powder. More concretely, similar steep improvements of photocatalytic water splitting rates from around 15 and a little over 2 to about 30 μmol•m −2 •hr −1 were obtained in the two (Pt-loaded)TiO2 crystallite diameters ranging from 16 to 23 and from 41 to 45 nm, respectively.

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Section: Future Strategies For Enhancing Photocatalytic Water Splittimentioning

confidence: 99%

Effect of TiO2 Crystallite Diameter on Photocatalytic Water Splitting Rate

Banno¹,

Kariya²,

Isu³

et al. 2014

GSC

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“…Photocatalysts play important roles in a variety of applications, namely in water decontaminations, air pollutants degradations and water splitting [1]- [9]. Concerning photocatalytic water splitting, Pt/TiO 2 powder is the most promising photocatalyst, as the band structures of TiO 2 are particularly well suited for water splitting and Pt loaded induces the Schottky effect.…”

Section: Introductionmentioning

confidence: 99%

“…In the former works, the efficient OSA of castor oil with an undesirable characteristic of water-insoluble and absorption/reflection of ultraviolet rays due to the solution before reaching the precipitated Pt/TiO 2 powder had been found [1] [2] [7] [9]. In order to overcome these obstructive matters described-above, agitation of the mixture of Pt/TiO 2 powder and OSA solution must be a great help to disperse Pt/TiO 2 powder through the whole solution, resulting to volumetric reactions and then higher H 2 producing rates expected.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Photocatalytic Water Splitting Rate via Rayleigh Convection

Deguchi¹,

Kariya²,

Isu³

et al. 2014

GSC

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In order to enhance photocatalytic water splitting rates with Pt/TiO2 powder, sufficient agitation of the biphasic medium is required to switch surficial reactions to volumetric reactions. Additionally, agitation is conducive to higher diffusion rates of the generated hydrogen and co-produced oxygen, hindering their ability to re-couple to water on Pt loaded to TiO2 powder. In order to create agitation without consuming any electricity, a novel technique utilizing Rayleigh convection was applied, and its ability to enhance photocatalytic water splitting rates was evaluated. Higher Rayleigh convective flow rates resulted in higher photocatalytic water splitting rates. Utilization of Rayleigh convection approximately doubled the photocatalytic water splitting rates, despite relatively low convective flow velocities (obtained through simple thermo-hydrodynamic simulations). The rate enhancement achieved through Rayleigh convection is a result of its ability to disperse the ultrafine Pt/TiO2 particles throughout the whole medium, leading to volumetric reactions.

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Induction by Visible Light of Photocatalytic Water Decontamination by Use of Powders of Nonlinear Optic Material and Visible-Light Phosphor to Generate Dispersed Ultraviolet Light

Cited by 2 publications

References 4 publications

Effect of TiO2 Crystallite Diameter on Photocatalytic Water Splitting Rate

Effect of TiO2 Crystallite Diameter on Photocatalytic Water Splitting Rate

Enhancement of Photocatalytic Water Splitting Rate via Rayleigh Convection

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