document.write( "<CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=5 CELLSPACING=0 BORDERCOLOR=#663333><TR BGCOLOR=#663333><TD HEIGHT=30 ALIGN=right><FONT COLOR=white SIZE=+1>Today's Paper</FONT>　<FONT COLOR=lightgrey> published (online)/received/accepted/etc on April 30 （7 publications）《WoS citation》<INPUT TYPE=button VALUE='Publication Page' ONCLICK=location.href='/cgi-bin/publication/db_publication_e.cgi?check_05=CHECKED&order=descent&showCitation=CHECKED'></FONT></TD></TR></TABLE></CENTER><CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=3 CELLSPACING=0 BORDERCOLOR=#663333 TITLE='A new heterogeneous catalytic system, phase-boundary catalysis, for epoxidation of alkene with aqueous H2O2 is proposed. Amphiphilic titanium-loaded zeolite particles, a part of the external surface of which was covered with hydrophobic alkyl groups and the rest being left hydrophilic, were prepared by deposition of titanium species from titanium(IV) tetra-2-propoxide and attachment of octadecylsilyl groups from n-octadecyltrichlorosilane (ODS) onto an NaY zeolite powder. Due to their amphiphilicity, the catalyst particles lay at the liquid-liquid phase boundary between upper alkene and lower aqueous phases, and they showed catalytic activity for epoxidation of 1-alkenes (e.g., 1-octene) with aqueous hydrogen peroxide. The phase-boundary catalytic system required neither stirring to make an emulsion nor addition of a cosolvent to make a homogeneous solution to drive the epoxidation. The yield of 1,2-epoxyoctane, a sole oxidation product from 1-octene, strongly depended on the apparent interphase area of the aqueous-organic phase boundary. The amphiphilic catalyst exhibited much higher catalytic activity than that of hydrophilic titanium-loaded NaY, without modification by ODS, or of a hydrophobic catalyst with almost full coverage by the alkyl groups. A similar trend in the activities of these catalysts was also observed when the reaction was carried out with vigorous stirring, in the presence of a cosolvent, or in a water-carbontetrachloride (CCl4) mixture, where the aqueous hydrogen peroxide phase lies above the CCl4 phase. The phase-boundary catalytic system could also be applied to epoxidation of other normal alkenes. Compared with nonporous silica particles, the use of microporous NaY with a relatively large surface area had a beneficial effect, probably due to an increase both in the surface contact between the aqueous and organic layer and in the number of effective active sites of titanium species on its external surface. On the basis of these experimental results, a reaction model is proposed.'><TR BGCOLOR=#663333><TD COLSPAN= VALIGN=middle popup_e> <SPAN CLASS=large><FONT COLOR=white><A NAME=''></A>■ AMP・2001 (full paper)　《85》 ANISOT_B［received 2001/04/30］</FONT> <IMG SRC='/image/misc/huscap.png' HEIGHT=15 VARIGN=bottom></SPAN></TD></TR><TR><TD VALIGN=middle BGCOLOR=#FFFFDD><B>Nur, H.</B>; <B>Ikeda, S.</B>; <B>Ohtani, B.</B>, Phase-Boundary Catalysis of Alkene Epoxidation with Aqueous Hydrogen Peroxide Using Amphiphilic Zeolite Particles Loaded with Titanium Oxide, <I>J. Catal.</I>, <B>204</B>, 402-408 (2001).* [<A HREF='http://dx.doi.org/10.1006/jcat.2001.3386'>DOI</A>] [<A HREF='http://hdl.handle.net/2115/14650'>HUSCAP</A>]</TD></TR></TABLE></CENTER><CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=3 CELLSPACING=0 BORDERCOLOR=#663333 TITLE='Size-selective photoetching was applied to silica-coated cadmium selenide (SiO2/CdSe) nanoparticles to precisely control their photoluminescence properties. The absorption spectra of CdSe was blue-shifted by irradiation of monochromatic light, and finally, the absorption onset agreed with the wavelength of irradiation light, indicating that CdSe particles were photoetched to smaller ones until the irradiated photons were not absorbed by the photoetched particles and that the SiO2 shell layer surrounding the CdSe core prevented coalescence between the photoetched particles. Although as-prepared SiO2/CdSe did not exhibit photoluminescence, the application of size-selective photoetching to SiO2/CdSe resulted in the development of the band gap emission, with the degree being enhanced with progress of the photoetching. The peak wavelength of photoluminescence decreased with a decrease in the wavelength used for the photoetching, so that the luminescence color could be tuned between red and blue. Partial photoetching of SiO2/CdSe nanoparticle films produced intense band gap emission of CdSe at the photoetched area, while the remainder of the SiO2/CdSe films did not exhibit detectable photoluminescence, resulting in the formation of a clear photoluminescence image under UV irradiation. This technique makes it possible to produce a multicolored photoluminescence image by irradiation with monochromatic lights having various wavelengths using a single source material.'><TR BGCOLOR=#663333><TD COLSPAN= VALIGN=middle popup_e> <SPAN CLASS=large><FONT COLOR=white><A NAME=''></A>■ SEL・2006 (full paper)　《45》 ANISOT_A［received 2006/04/30］</FONT> <IMG SRC='/image/misc/huscap.png' HEIGHT=15 VARIGN=bottom></SPAN></TD></TR><TR><TD VALIGN=middle BGCOLOR=#FFFFDD><B>Torimoto, T.</B>*; <B>Murakami, S.-y.</B>; <B>Sakuraoka, M.</B>; <B>Iwasaki, K.</B>; Okazaki, K.-i.; Shibayama, T.; <B>Ohtani, B.</B>, Photochemical Fine-Tuning of Luminescent Color of Cadmium Selenide Nanoparticles: Fabricating a Single-Source Multicolor Luminophore, <I>J. Phys. Chem. B</I>, <B>110</B>, 13314-13318 (2006).* [<A HREF='http://dx.doi.org/10.1021/jp062645c'>DOI</A>] [<A HREF='http://hdl.handle.net/2115/52785'>HUSCAP</A>]</TD></TR></TABLE></CENTER><CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=3 CELLSPACING=0 BORDERCOLOR=#663333 TITLE='Anatase titania (TiO2) particles were synthesized from titanium(IV) chloride (TiCl4) and oxygen (O2) through an improved gas-phase reaction process under rapid heating and rapid quenching conditions. The obtained particles were decahedral-shaped highly crystalline particles with specific surface area of 5―40 m2 g-1. These particles exhibited a level of photocatalytic activity higher than the representative commercial TiO2 photocatalysts for oxidative decomposition of acetic acid in an aqueous solution and acetaldehyde in air. Their higher level of activity is considered to be due to a combination of their moderate specific surface area and high crystallinity.'><TR BGCOLOR=#663333><TD COLSPAN= VALIGN=middle popup_e> <SPAN CLASS=large><FONT COLOR=white><A NAME=''></A>■ SGS・2011 (Full Paper)　《15》 ACTIVE［published 2011/04/30］</FONT> <IMG SRC='/image/misc/huscap.png' HEIGHT=15 VARIGN=bottom></SPAN></TD></TR><TR><TD VALIGN=middle BGCOLOR=#FFFFDD>Sugishita, N.; Kuroda, Y.; <B>Ohtani, B.</B>, Preparation of Decahedral Anatase Titania Particles with High-Level Photocatalytic Activity, <I>Catal. Today</I>, <B>164</B>, 391-394 (2011).* [<A HREF='http://dx.doi.org/10.1016/j.cattod.2010.11.003'>DOI</A>] [<A HREF='http://hdl.handle.net/2115/47048'>HUSCAP</A>] ●十面体形状アナタース酸化チタンのベンチスケール装置での合成と構造特性および光触媒活性の評価を行い，市販高活性酸化チタンの活性を大きく上回る活性をしめした．</TD></TR></TABLE></CENTER><CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=3 CELLSPACING=0 BORDERCOLOR=#663333 TITLE='Particles of tungsten oxide loaded with nanoparticulate platinum (Pt/WO3) photocatalytically produced phenol from benzene with high selectivity (e.g., 74% at 69% of benzene conversion) in water containing molecular O2; the selectivity for phenol was much higher than that on conventional titanium oxide (TiO2) photocatalysts (both the unmodified and Pt-loaded) that generated CO2 as a main product. Results confirmed that photoexcited electrons on the Pt/WO3 photocatalysts mainly generated H2O2 from molecular O2 through a two-electron reduction; the H2O2 generated did not significantly contribute to the undesirable peroxidation of the phenol produced. In contrast, the oxygen radical species, such as ・O2− or ・HO2, generated on TiO2 photocatalysts partially contributed to the successive oxidation of phenol and other intermediates to reduce the selectivity for phenol. More importantly, the reactions using 18O-labeled O2 and H2O clearly revealed that the holes generated on Pt/WO3 react primarily with H2O molecules, even in the presence of benzene in aqueous solution, selectively generating ・OH radicals that subsequently react with benzene to produce phenol. In contrast, a portion of the holes generated on TiO2 photocatalysts reacts directly with benzene molecules, which are adsorbed on the surface of TiO2 by strong interaction with surface hydroxyl groups. This direct oxidation of substances by holes undoubtedly enhanced non-selective oxidation, consequently lowering the selectivity for phenol by TiO2. The two unique features of Pt/WO3, the absence of reactive oxygen radical species from O2 and the ability to selectively oxidize water to form ・OH, are the most likely reasons for the highly selective phenol production.'><TR BGCOLOR=#663333><TD COLSPAN= VALIGN=middle popup_e> <SPAN CLASS=large><FONT COLOR=white><A NAME=''></A>■ FTOMI・2014 (full paper)　《81》 REDOXC［accepted 2014/04/30］</FONT> </SPAN></TD></TR><TR><TD VALIGN=middle BGCOLOR=#FFFFDD><B>Tomita, O.</B>; <B>Ohtani, B.</B>; <B>Abe, R.</B>, Highly selective phenol production from benzene on a platinum-loaded tungsten oxide photocatalyst with water and molecular oxygen: selective oxidation of water by holes for generating hydroxyl radical as the predominant source of the hydroxyl group, <I>Catal. Sci. Tech.</I>, <B>4</B>, 3850-3860 (2014).* [<A HREF='http://dx.doi.org/10.1039/c4cy00445k'>DOI</A>]</TD></TR></TABLE></CENTER><CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=3 CELLSPACING=0 BORDERCOLOR=#663333 TITLE='We recently reported the synthesis of a solid-state heterojunction photocatalyst consisting of zinc rhodium oxide (ZnRh2O4) and bismuth vanadium oxide (Bi4V2O11), which functioned as hydrogen (H2) and oxygen (O2) evolution photocatalysts, respectively, connected with silver (Ag). Polycrystalline Bi4V2O11 (p-Bi4V2O11) powders were utilized to form ZnRh2O4/Ag/p-Bi4V2O11, which was able to photocatalyze overall pure-water splitting under red-light irradiation with a wavelength of 700 nm (R. Kobayashi et al., J. Mater. Chem. A, 2016, 4, 3061). In the present study, we replaced p-Bi4V2O11 with a powder obtained by pulverizing single crystals of Bi4V2O11 (s-Bi4V2O11) to form ZnRh2O4/Ag/s-Bi4V2O11, and demonstrated that this heterojunction photocatalyst had enhanced water-splitting activity. In addition, ZnRh2O4/Ag/s-Bi4V2O11 was able to utilize nearly the entire range of visible light up to a wavelength of 740 nm. These properties were attributable to the higher O2 evolution activity of s-Bi4V2O11.'><TR BGCOLOR=#663333><TD COLSPAN= VALIGN=middle popup_e> <SPAN CLASS=large><FONT COLOR=white><A NAME=''></A>■ RYOTA・2016 (full paper)　《46》 NEWSYS［received 2016/04/30］</FONT><IMG SRC='/image/misc/oaLogo.png' HEIGHT=15 VARIGN=bottom> <IMG SRC='/image/misc/huscap.png' HEIGHT=15 VARIGN=bottom></SPAN></TD></TR><TR><TD VALIGN=middle BGCOLOR=#FFFFDD>Kobayashi, R.; Takashima, T.; Tanigawa, S.; <B>Takeuchi, S.</B>; <B>Ohtani, B.</B>; Irie, H., A Heterojunction Photocatalyst Composed of Zinc Rhodium Oxide, Single Crystal-Derived Bismuth Vanadium Oxide, and Silver for Overall Pure-Water Splitting under Visible Light up to 740 nm, <I>Phys. Chem. Chem. Phys.</I>, <B>18</B>, 27754 -27760 (2016).* [<A HREF='http://dx.doi.org/10.1039/c6cp02903e'>DOI</A>] [<A HREF='http://hdl.handle.net/2115/63434'>HUSCAP</A>]</TD></TR></TABLE></CENTER><CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=3 CELLSPACING=0 BORDERCOLOR=#663333><TR BGCOLOR=#663333><TD COLSPAN= VALIGN=middle popup_e> <SPAN CLASS=large><FONT COLOR=white><A NAME=''></A>■ SNGCR・2021 (Full paper)　《38》 ETRAPD［published 2021/04/30］</FONT> </SPAN></TD></TR><TR><TD VALIGN=middle BGCOLOR=#FFFFDD>Chuaicham, C.*; Xiong, Y.; Sekar, K.; Chen, W.; Zhang, L.; <B>Ohtani, B.</B>; Dabo, I.; Sasaki, K.*, A promising Zn-Ti layered double hydroxide/Fe-bearing montmorillonite composite as an efficient Z-scheme photocatalyst for Cr(VI) reduction: Insight into the role of Fe impurity in montmorillonite, <I>Appl. Surf. Sci.</I>, <B>546</B>, 148835 (2021).* [<A HREF='http://dx.doi.org/10.1016/j.apsusc.2020.148835'>DOI</A>]</TD></TR></TABLE></CENTER><CENTER><TABLE WIDTH=100% BORDER=1 CELLPADDING=3 CELLSPACING=0 BORDERCOLOR=#663333><TR BGCOLOR=#663333><TD COLSPAN= VALIGN=middle popup_e> <SPAN CLASS=large><FONT COLOR=white><A NAME=''></A>■ LIBOR・2024 (Paper)　《4》 ETRAPD［received 2024/04/30］</FONT> </SPAN></TD></TR><TR><TD VALIGN=middle BGCOLOR=#FFFFDD>Kajabova, M.; Strysovsky, T.; Bikbashev, A.; Kovarova, Z.; Simkovicova, K.; Prucek, R.; Panacek, A.; Novak, P.; Kopp, J.; Kaslik, J.; Malara, A.; Frontera, P.; Vajda, S.; <B>Ohtani, B.</B>; <B>Takashima, M.</B>; Kvitek, L., Electron traps as a valuable criterium of iron oxide catalysts' performance in CO<SUB>2</SUB> hydrogenation, <I>J. CO2 Utilization</I>, <B>85</B>, 102863 (2024).* [<A HREF='http://dx.doi.org/10.1016/j.jcou.2024.102863'>DOI</A>]</TD></TR></TABLE></CENTER>" )