研究者詳細 - 西本　俊介

論文 - 西本　俊介

分割表示 72 件中 41 - 60 件目／全件表示 >>

Difference in the catalytic activity of transition metals and their cations loaded in zeolite Y for ethanol steam reforming 査読

Hitoshi Inokawa, Shunsuke Nishimoto, Yoshikazu Kameshima, Michihiro Miyake

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 35 ( 21 ) 11719 - 11724 2010年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD

The catalytic activity for ethanol steam reforming of Na-Y zeolite supporting transition metals was compared with that of zeolite Y encapsulating transition metal cations. It was found that zeolite Y supporting Co or Ni, prepared by the incipient wetness impregnation process, produced mainly hydrogen at 300 degrees C. Acetaldehyde products indicated that hydrogen production was due to the dehydrogenation of ethanol molecules. On the other hand, for zeolite Y encapsulating cations such as Co(2+) or Ni(2+), prepared by an ion exchange process, the reforming reaction resulted in mainly ethylene production, which was considered to be due to the dehydration of ethanol molecules. The results indicate that the presence of cations in zeolite Y has a significant influence on the ethanol reforming reaction. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.ijhydene.2010.08.092

Characterization of Silicon Oxide Nanowires Prepared by Hydrothermal Treatment Using Slow Dissolution of Bulk Glass Source Materials 査読

Tomoyuki Kita, Shunsuke Nishimoto, Yoshikazu Kameshima, Michihiro Miyake

JOURNAL OF THE AMERICAN CERAMIC SOCIETY 93 ( 9 ) 2427 - 2429 2010年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：WILEY-BLACKWELL PUBLISHING, INC

Silicon oxide nanowires were successfully synthesized using a low-temperature hydrothermal treatment (200 degrees C) without the use of metallic catalysts. Scanning electron microscopy and transmission electron microscopy (TEM) revealed nanowires having uniform distribution and straight morphology with diameters ranging from 50 to 100 nm and lengths up to ca. 60 mu m. TEM results suggest that the nanowires consist of a crystalline core and an amorphous sheath. The nanowires were produced by hydrothermal treatment based on our original concept of slow structure formation by the dissolution of bulk glass source materials (borosilicate glasses), which can be used to supply a continuous source solution.

DOI： 10.1111/j.1551-2916.2010.03761.x

Electrode Properties of the Ruddlesden-Popper Series, Lan+1NinO3n+1 (n=1, 2, and 3), as Intermediate-Temperature Solid Oxide Fuel Cells 査読

Suguru Takahashi, Shunsuke Nishimoto, Motohide Matsuda, Michihiro Miyake

JOURNAL OF THE AMERICAN CERAMIC SOCIETY 93 ( 8 ) 2329 - 2333 2010年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：WILEY-BLACKWELL

The Ruddlesden-Popper phases, Lan+1NinO3n+1 (n=1, 2, and 3), were synthesized by a solid-state reaction for use as cathodes in an intermediate-temperature (500 degrees-700 degrees C) solid oxide fuel cell. The samples crystallized into an orthorhombic layered perovskite structure. The overall electrical conductivity increased with the increase of n in the intermediate temperature range. Single test-cells, which consisted of samarium-oxide-doped ceria (SDC; Sm0.2Ce0.8Ox) as an electrolyte, Ni-SDC cermet (Ni-SDC) as an anode, and Lan+1NinO3n+1 as a cathode, were fabricated for measurements of cell performance at 500 degrees-700 degrees C. Current interruption measurements revealed that both the ohmic and overpotential losses at 700 degrees C decreased with the increase of n. La4Ni3O10 was found to exhibit the best cathode characteristics in the Lan+1NinO3n+1 series. Maximum test-cell power densities with La4Ni3O10 (n=3) were 10.2, 36.5, and 88.2 mW/cm2 at 500 degrees, 600 degrees, and 700 degrees C, respectively.

DOI： 10.1111/j.1551-2916.2010.03743.x

Rewritable Superhydrophilic-Superhydrophobic Patterns on a Sintered Titanium Dioxide Substrate 査読

Kazuya Nakata, Shunsuke Nishimoto, Yumi Yuda, Tsuyoshi Ochiai, Taketoshi Murakami, Akira Fujishirna

LANGMUIR 26 ( 14 ) 11628 - 11630 2010年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：AMER CHEMICAL SOC

This Letter describes a new fabrication process for superhydrophilic-superhydrophobic patterns on a TiO(2) surface using a combination of an inkjet technique and the site-selective decomposition of a self-assembled monolayer (SAM) by a photocatalytic reaction under UV irradiation. To induce high surface wettability, we carried out simple calcination of a Ti substrate. The substrate was thus oxidized to titanium oxide and had a vortex-like rough morphology, which was suitable for the formation of wettability patterns. Furthermore, the substrate can be regenerated after elimination of the superhydrophilic-superhydrophobic patterns by the photocatalytic decomposition of TiO(2) using UV irradiation, and the patterns are deposited again. The renewed surface that we created had a wettability pattern that was different from the preceding pattern. This process is based on a TiO(2) surface and should offer a renewable, resource-saving, and environmentally friendly methodology for the formation of wettability patterns

DOI： 10.1021/la101947y

A novel nanocomposite material prepared by intercalating photoresponsive dendrimers into a layered double hydroxide 査読

Toshiyuki Tanaka, Shunsuke Nishimoto, Yoshikazu Kameshima, Junpei Matsukawa, Yasuhiko Fujita, Yutaka Takaguchi, Motohide Matsuda, Michihiro Miyake

JOURNAL OF SOLID STATE CHEMISTRY 183 ( 2 ) 479 - 484 2010年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ACADEMIC PRESS INC ELSEVIER SCIENCE

A novel combination for an inorganic-organic nanocomposite material was demonstrated. Anthryl dendron, i.e., poly(amidoamine) dendron with an anthracene chromophore group at the focal point, was incorporated in the interlayer space of ZnAl-NO(3) type layered double hydroxide (LDH) through an anion-exchange reaction. The photoabsorption and fluorescence properties of the resulting material were different from those of the bare anthryl dendron molecule. It was suggested that the change in photochemical properties was due to the organization and pi-pi interaction of anthracene chromophores within the interlayer of the LDH. (C) 2010 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.jssc.2009.12.016

Multichannel TiO2 hollow fibers with enhanced photocatalytic activity 査読

Tianyi Zhao, Zhaoyue Liu, Kazuya Nakata, Shunsuke Nishimoto, Taketoshi Murakami, Yong Zhao, Lei Jiang, Akira Fujishima

JOURNAL OF MATERIALS CHEMISTRY 20 ( 24 ) 5095 - 5099 2010年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ROYAL SOC CHEMISTRY

This work describes that the photocatalytic activity of microsized TiO2 fibers for degrading gaseous acetaldehyde can be systematically enhanced by introducing nanostructured interior hollow channels, which is achieved by a facile multifluidic electrospinning method. The increased channel number augments the BET surface area of TiO2 fibers intuitively. A quite interesting phenomenon is that the percentage increase for photocatalytic activity is higher than that for surface area. It is thus proposed that the multichannel hollow structures induce not only an inner trap effect on gaseous molecules, but also a multiple-reflection effect on incident light, which further improves the photocatalytic activity of TiO2 hollow fibers.

DOI： 10.1039/c0jm00484g

Fabrication of Oriented ZSM-5 Thin Films on Porous Substrates Using Slow Dissolution of Solid Source Materials 査読

Tomoyuki Kita, Shunsuke Nishimoto, Motohide Matsuda, Michihiro Miyake

JOURNAL OF THE AMERICAN CERAMIC SOCIETY 92 ( 12 ) 3074 - 3076 2009年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：WILEY-BLACKWELL PUBLISHING, INC

Dense b-axis-oriented ZSM-5 zeolite films with a thickness of approximately 300 nm were successfully synthesized on porous Y(2)O(3)-stabilized ZrO(2) supports. The films were produced via an in situ crystallization method based on a slow dissolution of solid source materials, which continuously supplies a superficial layer for the film growth.

DOI： 10.1111/j.1551-2916.2009.03290.x

Photocatalytic H-2 evolution by layered perovskite Ca3Ti2O7 codoped with Rh and Ln (Ln = La, Pr, Nd, Eu, Gd, Yb, and Y) under visible light irradiation 査読

Shunsuke Nishimoto, Yoshihiro Okazaki, Motohide Matsuda, Michihiro Miyake

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN 117 ( 1371 ) 1175 - 1179 2009年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：CERAMIC SOC JAPAN-NIPPON SERAMIKKUSU KYOKAI

Layered perovskite Ca3Ti2O7 codoped with Rh and Ln (Ca(3-x)Ln(x)Ti(1.9)Rh(0.1)O(7); Ln = La, Pr, Nd, Eu, Gd, Yb, and Y; 0 <= x <= 0.15) was synthesized by a conventional solid-state reaction to investigate the effects of Rh and Lit codoping on the photocatalytic activity. Rh and Ln-codoped Ca3Ti2O7 exhibited a higher photocatalytic activity than Rh-doped Ca3Ti2O7 for H-2 production from an aqueous methanol solution under visible light irradiation (lambda > 420 nm). In addition, the induction period for H-2 production was shortened by codoping with Rh and Ln. The codoped elements helped control the oxidation state of Rh ions and suppressed the formation of oxygen defects, improving the activity of the Rh-doped Ca3Ti2O7 photocatalyst. (C) 2009 The Ceramic Society of Japan. All rights reserved.

DOI： 10.2109/jcersj2.117.1175

Assembly of Self-Assembled Monolayer-Coated Al2O3 on TiO2 Thin Films for the Fabrication of Renewable Superhydrophobic-Superhydrophilic Structures 査読

Shunsuke Nishimoto, Hitomi Sekine, Xintong Zhang, Zhaoyue Liu, Kazuya Nakata, Taketoshi Murakami, Yoshihiro Koide, Akira Fujishima

LANGMUIR 25 ( 13 ) 7226 - 7228 2009年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：AMER CHEMICAL SOC

A renewable superhydrophobic-superhydrophilic pattern with a minimum dimension of 50 mu m is prepared from octadecyltrimethoxysilane self-assembled monolayer-covered superhydrophobic Al2O3 overlayers on a superhydrophilic TiO2 surface via self-assembly and calcination of boehmite (AlOOH center dot nH(2)O) particles. The resulting Al2O3 layer plays dual roles as a superhydrophobic layer and as a UV-blocking layer for the underlying TiO2.

DOI： 10.1021/la9011372

Fabrication of micro-patterned TiO2 thin films incorporating Ag nanoparticles 査読

Kazuya Nakata, Keizo Udagawa, Donald A. Tryk, Tsuyoshi Ochiai, Shunsuke Nishimoto, Hideki Sakai, Taketoshi Murakami, Masahiko Abe, Akira Fujishima

MATERIALS LETTERS 63 ( 18-19 ) 1628 - 1630 2009年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

A photosensitive TiO2 thin film embedded with Ag nanoparticles has been prepared from a Ti(OBu)(4)-acetylacetone solution, containing dispersed Ag nanoparticles, by the sol-gel method. UV-visible absorption spectra showed that the thin film obtained has two absorption bands, characteristic of the acetylacetone chelate rings and plasmon resonance from Ag nanoparticles. After the irradiation of UV light, the absorption band from the chelate rings almost disappeared. ascribed to structural changes associated with dissociation of the chelate rings. The thin film after the UV irradiation exhibited a broad absorption band in the IR spectrum, indicating that a Ti-O-Ti network was formed in the thin film. HRTEM and EDX spectra revealed that Ag nanoparticles were present and dispersed in the TiO2 thin film. Micro-patterns of 50 mu m dots have been fabricated by UV irradiation through a corresponding photomask, followed by leaching. (C) 2009 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.matlet.2009.04.035

TiO2-based superhydrophobic-superhydrophilic patterns: Fabrication via an ink-jet technique and application in offset printing 査読

Shunsuke Nishimoto, Atsushi Kubo, Kenji Nohara, Xintong Zhang, Noriaki Taneichi, Toshiki Okui, Zhaoyue Liu, Kazuya Nakata, Hideki Sakai, Taketoshi Murakami, Masahiko Abe, Takashi Komine, Akira Fujishima

APPLIED SURFACE SCIENCE 255 ( 12 ) 6221 - 6225 2009年4月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

A superhydrophobic-superhydrophilic pattern was prepared on an anodized Al plate by a new fabrication process. The process consists of five key steps: (1) TiO2 coating of the plate, (2) surface modi. cation with self-assembled monolayers (SAMs), (3) formation of aqueous UV light-resistant ink patterns by an ink-jet technique, (4) photocatalytic decomposition of SAMs and surface conversion to the superhydrophilic state and (5) removal of the aqueous ink patterns by water washing. It is particularly noteworthy that the wettability pattern can be quickly formed on the plate, without the use of a photomask. The fabricated superhydrophobic-superhydrophilic pattern is shown to be applicable to offset printing. (C) 2009 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.apsusc.2009.01.084

Photocatalytic and photoelectrochemical studies on N-doped TiO2 photocatalyst 査読

Xintong Zhang, Keizo Udagawa, Zhaoyue Liu, Shunsuke Nishimoto, Changshan Xu, Yichun Liu, Hideki Sakai, Masahiko Abe, Taketoshi Murakami, Akira Fujishma

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY 202 ( 1 ) 39 - 47 2009年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE SA

One of the commercial N-doped TiO2 powders (Sumitomo Chemicals, TPS 201) was studied as a model material by photocatalytic and photoelectrochemical methods in order to evaluate the photoactivity of N-doped TiO2 materials and the possibility of their applications in solar photocatalysis. The N-doped TiO2. powder (TPS) was able to degrade and mineralize phenol under solar or visible light (VL) irradiation, and the degradation rate was strongly dependent on the suspension concentration. Photoelectrochemical studies showed that the VL-irradiated TPS electrode was able to oxidize water, phenol, as well as maleic acid, an open-ring oxidized product of phenol, consistent with the results of photocatalytic studies. Calcining the TPS powder at/over 773 K was found to lower the absorption in the VL region and the photocatalytic activity under VL irradiation, but improve the photocatalytic activity under solar irradiation, suggesting that the mid-gap states introduced by nitrogen doping also worked as recombination centers. Deposition of Pt (0.2 wt%) on the TPS photocatalyst thus greatly increased the degradation rate of phenol under either solar or VL irradiation due to the suppression of charge recombination, and the degradation rate was found to be higher than a pristine TiO2 photocatalyst (ST-01, anatase) either with or Without loading of Pt. The potential application of the N-doped TiO2 in solar photocatalysis was discussed on the basis of above-mentioned studies. (c) 2008 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jphotochem.2008.11.007

Fabrication and Application of TiO2-Based Superhydrophilic-Superhydrophobic Patterns on Titanium Substrates for Offset Printing 査読

Kazuya Nakata, Shunsuke Nishimoto, Atsushi Kubo, Donald Tryk, Tsuyoshi Ochiai, Taketoshi Murakami, Akira Fujishima

CHEMISTRY-AN ASIAN JOURNAL 4 ( 6 ) 984 - 988 2009年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：WILEY-BLACKWELL

A fabrication process for superhydrophilic-superhydrophilic patterns on titanium substrates prepared through a combination of an ink-jet technique and site-selective decomposition of a self-assembled monolayer (SAM) by a TiO2 photocatalyst under UV irradiation is described. We demonstrate that the prepared titanium substrate is applicable as an offset printing plate with high resolution (133 and 150 lines per inch). Furthermore, the superhydrophilic-superhydrophobic patterns on the substrate can be deposited repeatedly after elimination of the patterns by photocatalytic decomposition of TiO2 under UV irradiation. A second printed image with the renewed substrate showed no significant difference in image quality compared with the initial image.

DOI： 10.1002/asia.200900005

Ultrastable TiO(2) foams derived macro-/meso-porous material and its photocatalytic activity 査読

Yong Zhao, Xintong Zhang, Jin Zhai, Lei Jiang, Zhaoyue Liuy, Shunsuke Nishimoto, Taketoshi Murakami, Akira Fujishima, Daoben Zhu

MICROPOROUS AND MESOPOROUS MATERIALS 116 ( 1-3 ) 710 - 714 2008年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

Particles-stabilized TiO(2) icecream-like foam was prepared by a versatile mechanical stirring method. It showed ultrastable state in air for several days. After calcining the wet foam, an open honeycomb-like structure with macro-/meso-porosity was formed. The photocatalytic characters of as-prepared macro-/meso-porous materials were detected, and the results indicated that the catalytic activity is increased about 120% compared to that of nanoparticles with acetaldehyde as a probe. Composite porous structure provided open pathways for high accessibility of molecular transport, increased surface area for more active center, and enhanced light-collection efficiency due to the inner light scattering effect, resulting in better photocatalytic activity. (C) 2008 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.micromeso.2008.05.024

Efficient Photocatalytic Degradation of Gaseous Acetaldehyde by Highly Ordered TiO2 Nanotube Arrays 査読

Zhaoyue Liu, Xintong Zhang, Shunsuke Nishimoto, Taketoshi Murakami, Akira Fujishima

ENVIRONMENTAL SCIENCE & TECHNOLOGY 42 ( 22 ) 8547 - 8551 2008年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：AMER CHEMICAL SOC

Highly ordered TiO2 nanotube array prepared by electrochemical anodization generates considerable interest as a practical air purifier, since a nanotube array can form a TiO2 film with a porous surface and straight gas diffusion channel, simultaneously reserving enough geometric thickness. Here, we reported on the application of highly ordered TiO2 nanotube arrays with different lengths for degradation of gaseous acetaldehyde pollutants in air. The results showed that increasing the lengths of nanotube arrays within a certain range could significantly improve the degradation rate of acetaldehyde molecules, The main product of acetaldehyde degradation was detected to be CO2, which indicated that the mineralization of acetaldehyde molecules was the major process in this photocatalytic reaction. When compared with a P25 TiO2 nanoparticulate film with similar thickness and geometric area, in the initial degradation of acetaldehyde, the nanotube array did not show obvious superiority. However, in the subsequent degradation, the nanotube array demonstrated an enhanced photocatalytic activity. It was suggested that this enhancement resulted from the special infrastructure of the nanotube array, which was favorable for the diffusion of intermediates and the reduced deactivation of photocatalyst in the photocatalytic reaction.

DOI： 10.1021/es8016842

Enhanced photocatalytic activity of hierarchically micro-/nano-porous TiO2 films 査読

Yong Zhao, Xintong Zhang, Jin Zhai, Jinling He, Lei Jiang, Zhaoyue Liu, Shunsuke Nishimoto, Taketoshi Murakami, Akira Fujishima, Daoben Zhu

APPLIED CATALYSIS B-ENVIRONMENTAL 83 ( 1-2 ) 24 - 29 2008年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

Photocatalytic activity of hierarchically micro-/nano-porous film is studied for the first time. The results show its catalytic activity was increased ca. 30-40% and ca. 60-70% for mineralizing gaseous acetaldehyde and liquid-phase phenol, respectively. comparing to that of nanostructured film. Hierarchical TiO2 porous film produces continuously composite pore channels. providing the fast trans-port pathway for reactants. products and 0, moving into and Out of the catalytic framework. Additionally, due to extended optical path length from light scattering effect in composite film, the light-absorption efficiency is enhanced distinctly in the range of 380-410 nm, which is close to P25 TiO2 band-gap edge. The presented investigation indicates that the pores structure plays important roles in the photocatalytic characters of films photocatalyst. More important, the as-prepared film catalyst gives a promising future for its actual application. (C) 2008 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.apcatb.2008.01.035

Photocatalytic activity of Ca(3)Ti(2)O(7) layered-perovskite doped with Rh under visible light irradiation 査読

Yoshihiro Okazaki, Takahiro Mishima, Shunsuke Nishimoto, Motohide Matsuda, Michihiro Miyake

MATERIALS LETTERS 62 ( 19 ) 3337 - 3340 2008年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

The photocatalytic activities of layered-perovskite Ca(3)Ti(2)O(7) doped with Rh were investigated with visible light irradiation. Although the Rh-doped Ca(3)Ti(2)O(7) as prepared showed low activity after an induction period, the photocatalytic activity was highly enhanced by treating the samples in reducing atmosphere without the need for an induction period. The rate of H(2) evolution from an aqueous methanol solution by 3 mol% Rh-doped Ca(3)Ti(2)O(7) after the reduction treatment was about 5 times higher than that before the reduction. The layered photocatalytic compounds, Ca(3)Ti(2-x)Rh(x)O(7), showed higher stability in air than CaTi(1-x)Rh(x)O(3), which consists of a simple perovskite structure. (C) 2008 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.matlet.2008.02.052

Novel hydrophobic/hydrophilic patterning process by photocatalytic Ag nucleation on TiO2 thin film and electroless Cu deposition 査読

Shunsuke Nishimoto, Atsushi Kubo, Xintong Zhang, Zhaoyue Liu, Noriaki Taneichi, Toshiki Okui, Taketoshi Murakami, Takashi Komine, Akira Fujishima

APPLIED SURFACE SCIENCE 254 ( 18 ) 5891 - 5894 2008年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

A hydrophobic/super-hydrophilic pattern was prepared on a TiO2 thin film by a new fabrication process. The process consists of five key steps: (1) photocatalytic reduction of Ag+ to Ag (nucleation), (2) electroless Cu deposition, (3) oxidation of Cu to CuO, (4) deposition of a self-assembled monolayer (SAM), and (5) photocatalytic decomposition of selected areas of the SAM. A hydrophobic/super-hydrophilic pattern with 500-mu m(2) hydrophilic areas was obtained in this process. It is particularly noteworthy that a UV irradiation time of only 1 s was sufficient for the nucleation step in the patterning process. (C) 2008 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.apsusc.2008.03.153

Highly ordered TiO2 nanotube arrays with controllable length for photoelectrocatalytic degradation of phenol 査読

Zhaoyue Liu, Xintong Zhang, Shunsuke Nishimoto, Ming Jin, Donald A. Tryk, Taketoshi Murakami, Akira Fujishima

JOURNAL OF PHYSICAL CHEMISTRY C 112 ( 1 ) 253 - 259 2008年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：AMER CHEMICAL SOC

Highly ordered TiO2 nanotube array prepared by a potentiostatic anodization shows a considerable potential for improving the transport of the photogenerated electrons in the TiO2 film, since the ordered architecture can provide a unidirectional electric channel and reduce the grain boundaries. Here, we report on the application of highly ordered TiO2 nanotube arrays with different lengths for the photoelectrocatalytic degradation of phenol. The lengths of the nanotube arrays can be controlled by the electrolyte media, anodization time, or both. The photoelectrocatalytic activity shows a dependence on the length of the nanotube arrays. Under 3.1 mW/cm(2) irradiance of ultraviolet light, a short nanotube array shows better photoelectrocatalytic activity than a long nanotube array, which can be explained by the reduced recombination effects. When compared with a P25 TiO2 particulate film with similar thickness and geometric area, the nanotube array shows a stronger attachment to the parent titanium substrate and a better photoelectrocatalytic activity for phenol degradation owing to the improved electron transport and reduced charge recombination. This superior electron transport is further supported by the remarkably enhanced anodic photocurrent response in the degradation of phenol.

DOI： 10.1021/jp0772732

A transparent and photo-patternable superhydrophobic film 査読

Xintong Zhang, Hiroki Kono, Zhaoyue Liu, Shunsuke Nishimoto, Donald A. Tryk, Taketoshi Murakami, Hideki Sakai, Masahiko Abe, Akira Fujishima

CHEMICAL COMMUNICATIONS ( 46 ) 4949 - 4951 2007年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ROYAL SOC CHEMISTRY

A transparent superhydrophobic TiO2 film, prepared by spincoating a TiO2 slurry on a glass substrate and modifying the resultant TiO2 film with fluoroalkylsilane molecules, was patterned by illumination with ultraviolet light through a photomask, producing a superhydrophobic/superhydrophilic surface micropattern with very small superhydrophilic areas, which we were able to selectively fill with alginate hydrogel.

DOI： 10.1039/b713432k

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