研究者詳細 - 中西　和樹

論文 - 中西　和樹

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Boehmite Nanofiber-Polymethylsilsesquioxane Core-Shell Porous Monoliths for a Thermal Insulator under Low Vacuum Conditions 査読有り

Hayase, G; Nonomura, K; Kanamori, K; Maeno, A; Kaji, H; Nakanishi, K

CHEMISTRY OF MATERIALS 28 巻 ( 10 ) 頁： 3237 - 3240 2016年5月

Metal zirconium phosphate macroporous monoliths: Versatile synthesis, thermal expansion and mechanical properties 査読有り

Zhu, Y; Kanamori, K; Moitra, N; Kadono, K; Ohi, S; Shimobayashi, N; Nakanishi, K

MICROPOROUS AND MESOPOROUS MATERIALS 225 巻頁： 122 - 127 2016年5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：Microporous and Mesoporous Materials

A versatile synthetic method has been developed for the fabrication of metal zirconium phosphate (MZP) macroporous monoliths via a sol-gel process accompanied by phase separation. More than 30 kinds of MZP monolithic polycrystalline monoliths with co-continuous macroporous structure have been synthesized by simply adding the target metal salt in the starting solution with optimized compositions. Glycerol, due to its high boiling point, plays the key role as the solvent to prevent metal salt from recrystallization, allowing a homogeneous distribution of metal salts over the polymerizing zirconium phosphate network. Hierarchically porous polycrystalline strontium zirconium phosphate (SrZrP) monolith has been obtained when the dried gel was calcined at 1000 °C. Very low thermal expansion (coefficient of thermal expansion (CTE) as 1.4 × 10-6 K-1) over a wide temperature range (38 °C-1000 °C) together with good mechanical properties (flexural modulus as 8.0 GPa from 3 point bending test and Young's modulus as 1.9 GPa from uniaxial compression test) has been demonstrated, while high porosity (43%) due to the presence of macropores reduces bulk density. As compared with dense ceramics of the same composition, the CTE value is lower and can be attributed to the presence of nanometer-sized small pores, which absorbs the anisotropic thermal expansion of each crystallite in the macropore skeletons at elevated temperatures.

DOI： 10.1016/j.micromeso.2015.12.002

Encapsulation of hydrophobic ingredients in hard resin capsules with ultrahigh efficiency using a superoleophobic material 査読有り

Takei, T; Terazono, K; Araki, K; Ozuno, Y; Hayase, G; Kanamori, K; Nakanishi, K; Yoshida, M

POLYMER BULLETIN 73 巻 ( 2 ) 頁： 409 - 417 2016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：Polymer Bulletin

Spherical capsules have been used in various fields because of their many advantages. In many industrial applications, hydrophobic hard resins (e.g., polyacrylate, epoxy and polystyrene) are used as a shell material for stable packaging of ingredients within capsules. However, it is difficult to encapsulate ingredients in such capsules without loss by conventional techniques. The purpose of this study was to encapsulate hydrophobic ingredients within polyacrylate resin capsules with ultrahigh efficiency. In our methodology, a small volume of resin monomer solution containing the ingredients was first placed on a superoleophobic material and the resulting spherical droplets were then solidified by polymerization of the monomer. Doxorubicin (an anticancer drug), α-tocopherol (an antioxidant) and tetradecane (a phase change material used for heat storage) could be encapsulated in spherical hard capsules with almost no loss by heat and photopolymerization. We showed that tetradecane in the capsules had almost identical thermal properties to pure tetradecane. These results demonstrate that our technique is promising for encapsulation of hydrophobic ingredients in hard resin capsules.

DOI： 10.1007/s00289-015-1497-y

The chromatographic performance of flow-through particles: A computational fluid dynamics study 査読有り

Smits, W; Nakanishi, K; Desmet, G

JOURNAL OF CHROMATOGRAPHY A 1429 巻頁： 166 - 174 2016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：Journal of Chromatography A

The performance of flow-through particles has been studied by computational fluid dynamics. Computational fluid dynamics simulations was used to calculate the flow behaviour around and inside the particles rather than estimate it. The obtained flow field has been used to accurately simulate plate heights generated by flow-through particles and compare them to standard fully porous particles. The effects of particle size, particle porosity and microparticle size on the intra-particle flow and plate heights is investigated. It is shown that the intra-particle flow generates mass transfer enhancement which lowers the total plate height. An empirical model is proposed for the mass transfer enhancement and it is compared to previously proposed models. Kinetic plots are constructed for the flow-through particles. Counter-intuitively, columns packed with flow-through particles have a higher flow resistance which counters the advantages of lower plate heights. Flow-through particles offer no significant gain in kinetic performance over fully porous particles.

DOI： 10.1016/j.chroma.2015.12.019

Hierarchically porous titanium phosphate monoliths and their crystallization behavior in ethylene glycol 査読有り

Zhu, Y; Yoneda, K; Kanamori, K; Takeda, K; Kiyomura, T; Kurata, H; Nakanishi, K

NEW JOURNAL OF CHEMISTRY 40 巻 ( 5 ) 頁： 4153 - 4159 2016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：New Journal of Chemistry

Hierarchically porous titanium phosphate monoliths combining well-defined co-continuous macropores and accessible large mesopores have been synthesized for the first time via a sol-gel process accompanied by phase separation using titanium oxysulfate and phosphoric acid as precursors. The macropore size was tunable over a broad range from 0.6 μm to 10 μm by changing the starting composition, while the mesopore size and the specific surface area of the as-synthesized amorphous monoliths are 21 nm and 320 m2 g-1, respectively. Crystallization of the gel network can be induced in two different ways. Calcination at elevated temperature (800 °C) leads to the formation of TiP2O7 and the collapse of both the macro- and meso-structures, while the solvothermal treatment of the as-synthesized gel in ethylene glycol leads to the formation of platy crystals of titanium phosphate with a layered structure at relatively low temperature. The titanium phosphate monoliths with a hierarchically porous structure are expected to be useful in various applications such as continuous-flow catalysis, water remediation and ion batteries.

DOI： 10.1039/c5nj02820e

Hard Carbon Anodes for Na-Ion Batteries: Toward a Practical Use 査読有り

Hasegawa, G; Kanamori, K; Kannari, N; Ozaki, J; Nakanishi, K; Abe, T

CHEMELECTROCHEM 2 巻 ( 12 ) 頁： 1917 - 1920 2015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：ChemElectroChem

Hard carbons have immense potential as anode materials for Na-ion batteries, because the expanded graphene interlayers and nanovoids between randomly stacked aromatic fragments can accommodate a substantial amount of sodium. However, the large irreversible capacity in the first cycle still remains as a significant issue in terms of a practicable battery technology. Here, we show that hard carbon electrodes derived from a common phenol resin deliver a high reversible capacity within the narrow potential range of 0.1-0.005V (vs. Na+/Na) and an excellent initial coulombic efficiency up to 95%. The former allows the sustainable high voltage, whereas the latter minimizes the amount of unavailable Na+ in a closed cell. The findings in this work put forward a guideline for manufacturing hard carbon electrodes, which goes against the current trend of nanostructuring and downsizing. It's got potential: Carbon electrodes derived from a phenol resin for Na-ion batteries show potential profiles just like those of Li-ion intercalation/extraction into/from graphite. The high reversible capacity and the excellent initial coulombic efficiency well above 90% have great potential for a practical use.

DOI： 10.1002/celc.201500412

Synthesis of hierarchically porous polymethylsilsesquioxane monoliths with controlled mesopores for HPLC separation 査読有り

Zhu, Y; Morimoto, Y; Shimizu, T; Morisato, K; Takeda, K; Kanamori, K; Nakanishi, K

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN 123 巻 ( 1441 ) 頁： 770 - 778 2015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：Journal of the Ceramic Society of Japan

Solgel synthesis of macroporous polymethylsilsesquioxane (PMSQ) monoliths has been successful over the past decade, and applications to separation media have been investigated. However, the control of mesopores to tailor hierarchical porosity, which is promising for improvement of the separation efficiency, remains challenging. In particular, an independent control of mesoand macropores has not been achieved in PMSQ. Herein we present a method to synthesize PMSQ monoliths with well-defined macropores and controlled mesostructure (pore size ranging from 10 to 60 nm, total pore volume from 0.2 to 0.6 cm3 g-1) via solgel accompanied by phase separation. Different Pluronic-type nonionic surfactants were used to control phase separation of the hydrophobic PMSQ network in aqueous media. Due to different packing density of the colloidal PMSQ constituents in the continuous skeletons in the micrometer-scale (termed as macropore skeletons) and their rearrangements through the hydrothermal post-treatment under basic conditions, mesopore characteristics have been successfully controlled independently of the preformed macropore structure. Separation columns for high-performance liquid chromatography (HPLC) have been fabricated using the PMSQ monoliths, and acceptable separation performances in both the reversed-phase and normal-phase modes have been demonstrated due to the presence of both hydrophilic silanol groups and hydrophobic methyl groups.

DOI： 10.2109/jcersj2.123.770

Novel soft touch silicone beads from methyltrimethoxysilane and dimethyldimethoxysilane using easy aqueous solution reaction 査読有り

Tsuchiya, R; Tanaka, T; Hayase, G; Kanamori, K; Nakanishi, K

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN 123 巻 ( 1441 ) 頁： 714 - 718 2015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：Journal of the Ceramic Society of Japan

Conventionally, commercialized spherical silicone powders, such as silicone resin powder [INCI: POLYMETHYLSILSESQUIOXANE (PMSQ beads)]1) and silicone rubber powder [INCI: DIMETHICONE/VINYL DIMETHICONE CROSSPOLYMER (DVDC beads)],2) have been formulated into cosmetics for soft and smooth feeling. Due to the low crosslink density, silicone rubber powder shows soft touch and high oil absorption. However, it is too agglomerative to be formulated into powder foundation. In this work, we have developed the novel soft touch spherical silicone beads made from methyltrimethoxysilane (MTMS) and dimethyldimethoxysilane (DMDMS), using a surfactant, cetyltrimethylammonium chloride (CTAC). The preparation procedure of the novel silicone beads requires only homogeneous mixing and includes no other complicated operations. The 29Si NMR and TG measurements indicate that DMDMS is randomly incorporated into the methylsiloxane network. The particle size of the beads can be controlled by the concentration of urea as well as by the stirring speed in the solgel reaction. By carefully adjusting these parameters, the size of the beads has been optimized for the use in make-up cosmetics. It was revealed by various evaluation measurements that the novel silicone beads exhibit unique characteristics, such as softness, low oil absorption, high transparency and light diffusion effects.

DOI： 10.2109/jcersj2.123.714

High-performance liquid chromatography separation of unsaturated organic compounds by a monolithic silica column embedded with silver nanoparticles 査読有り

Zhu, Y; Morisato, K; Hasegawa, G; Moitra, N; Kiyomura, T; Kurata, H; Kanamori, K; Nakanishi, K

JOURNAL OF SEPARATION SCIENCE 38 巻 ( 16 ) 頁： 2841 - 2847 2015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：Journal of Separation Science

The optimization of a porous structure to ensure good separation performances is always a significant issue in high-performance liquid chromatography column design. Recently we reported the homogeneous embedment of Ag nanoparticles in periodic mesoporous silica monolith and the application of such Ag nanoparticles embedded silica monolith for the high-performance liquid chromatography separation of polyaromatic hydrocarbons. However, the separation performance remains to be improved and the retention mechanism as compared with the Ag ion high-performance liquid chromatography technique still needs to be clarified. In this research, Ag nanoparticles were introduced into a macro/mesoporous silica monolith with optimized pore parameters for high-performance liquid chromatography separations. Baseline separation of benzene, naphthalene, anthracene, and pyrene was achieved with the theoretical plate number for analyte naphthalene as 36 000 m-1. Its separation function was further extended to cis/trans isomers of aromatic compounds where cis/trans stilbenes were chosen as a benchmark. Good separation of cis/trans-stilbene with separation factor as 7 and theoretical plate number as 76 000 m-1 for cis-stilbene was obtained. The trans isomer, however, is retained more strongly, which contradicts the long- established retention rule of Ag ion chromatography. Such behavior of Ag nanoparticles embedded in a silica column can be attributed to the differences in the molecular geometric configuration of cis/trans stilbenes.

DOI： 10.1002/jssc.201500444

High-Level Doping of Nitrogen, Phosphorus, and Sulfur into Activated Carbon Monoliths and Their Electrochemical Capacitances 査読有り

Hasegawa, G; Deguchi, T; Kanamori, K; Kobayashi, Y; Kageyama, H; Abe, T; Nakanishi, K

CHEMISTRY OF MATERIALS 27 巻 ( 13 ) 頁： 4703 - 4712 2015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：Chemistry of Materials

The present report demonstrates a new technique for doping heteroatoms (nitrogen, phosphorus, and sulfur) into carbon materials via a versatile post-treatment. The heat-treatment of carbon materials with a reagent, which is stable at ambient temperatures and evolves reactive gases on heating, in a vacuum-closed tube allows the introduction of various heteroatom-containing functional groups into a carbon matrix. In addition, the sequential doping reactions give rise to dual- and triple-heteroatom-doped carbons. The pore properties of the precursor carbon materials are preserved through each heteroatom doping process, which indicates that independent tuning of heteroatom doping and nanostructural morphology can be achieved in various carbon materials. The electrochemical investigation on the undoped and doped carbon monolithic electrodes applied to supercapacitors provides insights into the effects of heteroatom doping on electrochemical capacitance. (Figure Presented).

DOI： 10.1021/acs.chemmater.5b01349

Effect of Calcination Conditions on Porous Reduced Titanium Oxides and Oxynitrides via a Preceramic Polymer Route (vol 54, pg 2802, 2015) 査読有り

Hasegawa, G; Sato, T; Kanamori, K; Sun, CJ; Ren, Y; Kobayashi, Y; Kageyama, H; Abe, T; Nakanishi, K

INORGANIC CHEMISTRY 54 巻 ( 11 ) 頁： 5614 - 5614 2015年6月

Preparation of macroporous zirconia monoliths from ionic precursors via an epoxide-mediated sol-gel process accompanied by phase separation 査読有り

Guo, XZ; Song, J; Lvlin, YX; Nakanishi, K; Kanamori, K; Yang, H

SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 16 巻 ( 2 ) 頁： 025003 2015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：Science and Technology of Advanced Materials

Monolithic macroporous zirconia (ZrO<inf>2</inf>) derived from ionic precursors has been successfully fabricated via the epoxide-mediated sol-gel route accompanied by phase separation in the presence of propylene oxide (PO) and poly(ethylene oxide) (PEO). The addition of PO used as an acid scavenger mediates the gelation, whereas PEO enhances the polymerization-induced phase separation. The appropriate choice of the starting compositions allows the production of a macroporous zirconia monolith with a porosity of 52.9% and a Brunauer-Emmett-Teller (BET) surface area of 171.9 m<sup>2</sup> · g<sup>-1</sup>. The resultant dried gel is amorphous, whereas tetragonal ZrO<inf>2</inf> and monoclinic ZrO<inf>2</inf> are precipitated at 400 and 600 °C, respectively, without spoiling the macroporous morphology. After solvothermal treatment with an ethanol solution of ammonia, tetragonal ZrO<inf>2</inf> monoliths with smooth skeletons and well-defined mesopores can be obtained, and the BET surface area is enhanced to 583.8 m<sup>2</sup> · g<sup>-1</sup>.

DOI： 10.1088/1468-6996/16/2/025003

Effect of Calcination Conditions on Porous Reduced Titanium Oxides and Oxynitrides via a Preceramic Polymer Route 査読有り

Hasegawa, G; Sato, T; Kanamori, K; Sun, CJ; Ren, Y; Kobayashi, Y; Kageyama, H; Abe, T; Nakanishi, K

INORGANIC CHEMISTRY 54 巻 ( 6 ) 頁： 2802 - 2808 2015年3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：Inorganic Chemistry

A preceramic polymer route from Ti-based inorganic-organic hybrid networks provides electroconductive N-doped reduced titanium oxides (Ti n O 2n-1 ) and titanium oxynitrides (TiO x N y ) with a monolithic shape as well as well-defined porous structures. This methodology demonstrates an advantageously lower temperature of the crystal phase transition compared to the reduction of TiO 2 by carbon or hydrogen. In this study, the effect of calcination conditions on various features of the products has been explored by adopting three different atmospheric conditions and varying the calcination temperature. The detailed crystallographic and elemental analyses disclose the distinguished difference in the phase transition behavior with respect to the calcination atmosphere. The correlation between the crystallization and nitridation behaviors, porous properties, and electric conductivities in the final products is discussed.

DOI： 10.1021/ic502972v

Efficiency of short, small-diameter columns for reversed-phase liquid chromatography under practical operating conditions 査読有り

Ma, Y; Chassy, AW; Miyazaki, S; Motokawa, M; Morisato, K; Uzu, H; Ohira, M; Furuno, M; Nakanishi, K; Minakuchi, H; Mriziq, K; Farkas, T; Fiehn, O; Tanaka, N

JOURNAL OF CHROMATOGRAPHY A 1383 巻頁： 47 - 57 2015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：Journal of Chromatography A

Prototype small-size (1.0mm I.D., 5cm long) columns for reversed-phase HPLC were evaluated in relation to instrument requirements. The performance of three types of columns, monolithic silica and particulate silica (2μm, totally porous and 2.6μm, core-shell particles) was studied in the presence of considerable or minimal extra-column effects, while the detector contribution to band broadening was minimized by employing a small size UV-detector cell (6- or 90nL). A micro-LC instrument having small system volume (<1μL) provided extra-column band variance of only 0.01-0.02μL2. The three columns generated about 8500 theoretical plates for solutes with retention factor, k>1-3 (depending on the column), in acetonitrile/water mobile phase (65/35=vol/vol) at 0.05mL/min, with the instrument specified above. The column efficiency was lower by up to 30% than that observed with a 2.1mm I.D. commercial column. The small-size columns also provided 8000-8500 theoretical plates for well retained solutes with a commercial ultrahigh-pressure liquid chromatography (UHPLC) instrument when extra-column contributions were minimized. While a significant extra-column effect was observed for early eluting solutes (k<2-4, depending on column) with methanol/water (20/80=vol/vol) as weak-wash solvent, the use of methanol/water=50/50 as wash solvent affected the column efficiency for most analytes. The results suggest that the band compression effect by the weak-wash solvent associated with partial-loop injection may provide a practical means to reducing the extra-column effect for small-size columns, while the use of an instrument with minimum extra-column effect is highly desirable.

DOI： 10.1016/j.chroma.2015.01.014

その他リンク： http://orcid.org/0000-0002-8069-4780

Ultralow-Density, Transparent, Superamphiphobic Boehmite Nanofiber Aerogels and Their Alumina Derivatives 査読有り

Hayase, G; Nonomura, K; Hasegawa, G; Kanamori, K; Nakanishi, K

CHEMISTRY OF MATERIALS 27 巻 ( 1 ) 頁： 3 - 5 2015年1月

Hierarchically Porous Li<sub>4</sub>Ti<sub>5</sub>O<sub>12</sub> Anode Materials for Li- and Na-Ion Batteries: Effects of Nanoarchitectural Design and Temperature Dependence of the Rate Capability 査読有り

Hasegawa, G; Kanamori, K; Kiyomura, T; Kurata, H; Nakanishi, K; Abe, T

ADVANCED ENERGY MATERIALS 5 巻 ( 1 ) 2015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：Advanced Energy Materials

Integrated design of both porous structure and crystalline morphology is expected to open up the way to a new class of materials. This report demonstrates new nanostructured Li4Ti5O12 materials with hierarchically porous structures and flower-like morphologies. Electrochemical studies of the electrodes of Li-ion and Na-ion batteries clearly reveal the advantage of nanoarchitectural design of active materials. In addition, the temperature dependence of Na+-insertion/extraction capacity in relation to Li4Ti5O12 electrodes is for the first time evaluated and it is found that elevation of the cell operating temperature effectively improves the rate capability of the Na-ion batteries. Based on the new findings, it is suggested that specially designed Li4Ti5O12 materials allow for high-performance Na-ion batteries that are available as large-scale storage devices for applications such as automotive and stationary energy storage.

DOI： 10.1002/aenm.201400730

Direct preparation and conversion of copper hydroxide-based monolithic xerogels with hierarchical pores 査読有り

Fukumoto, S; Nakanishi, K; Kanamori, K

NEW JOURNAL OF CHEMISTRY 39 巻 ( 9 ) 頁： 6771 - 6777 2015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：New Journal of Chemistry

Copper hydroxide-based monolithic xerogels with controlled hierarchical pores have been prepared directly by a sol-gel process from an ionic precursor, CuCl2·2H2O. Propylene oxide acts as a gelation inducer by increasing pH homogeneously in a reaction solution. Poly(acrylamide) is utilized not only to control macroscopic phase separation but also to support the network physically. Glycerol contributes to the formation of monolithic gels by suppressing the growth of copper hydroxide crystals. An appropriate starting composition leads to co-continuous gel skeletons and macropores. Although the as-dried gels were amorphous, post-treatments (calcination and solvothermal treatment) formed metallic copper and copper oxides (CuO and Cu2O) without the collapse of the monolithic form and macrostructure.

DOI： 10.1039/c5nj00479a

Mechanically stable, hierarchically porous Cu<sub>3</sub>(btc)<sub>2</sub> (HKUST-1) monoliths <i>via</i> direct conversion of copper(II) hydroxide-based monoliths 査読有り

Moitra, N; Fukumoto, S; Reboul, J; Sumida, K; Zhu, Y; Nakanishi, K; Furukawa, S; Kitagawa, S; Kanamori, K

CHEMICAL COMMUNICATIONS 51 巻 ( 17 ) 頁： 3511 - 3514 2015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：Chemical Communications

The synthesis of highly crystalline macro-meso-microporous monolithic Cu3(btc)2 (HKUST-1; btc3- = benzene-1,3,5-tricarboxylate) is demonstrated by direct conversion of Cu(OH)2-based monoliths while preserving the characteristic macroporous structure. The high mechanical strength of the monoliths is promising for possible applications to continuous flow reactors. This journal is

DOI： 10.1039/c4cc09694k

Mesoscopic superstructures of flexible porous coordination polymers synthesized <i>via</i> coordination replication 査読有り

Sumida, K; Moitra, N; Reboul, J; Fukumoto, S; Nakanishi, K; Kanamori, K; Furukawa, S; Kitagawa, S

CHEMICAL SCIENCE 6 巻 ( 10 ) 頁： 5938 - 5946 2015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：Chemical Science

The coordination replication technique is employed for the direct conversion of a macro- and mesoporous Cu(OH)<inf>2</inf>-polyacrylamide composite to three-dimensional superstructures consisting of the flexible porous coordination polymers, Cu<inf>2</inf>(bdc)<inf>2</inf>(MeOH)<inf>2</inf> and Cu<inf>2</inf>(bdc)<inf>2</inf>(bpy) (bdc<sup>2-</sup> = 1,4-benzenedicarboxylate, bpy = 4,4′-bipyridine). Detailed characterization of the replicated systems reveals that the structuralization plays an important role in determining the adsorptive properties of the replicated systems, and that the immobilization of the crystals within a higher-order architecture also affects its structural and dynamic properties. The polyacrylamide polymer is also found to be crucial for maintaining the structuralization of the monolithic systems, and in providing the mechanical robustness required for manual handling. In all, the results discussed here demonstrate a significant expansion in the scope of the coordination replication strategy, and further confirms its utility as a highly versatile platform for the preparation of functional three-dimensional superstructures of porous coordination polymers.

DOI： 10.1039/c5sc02034d

Preparation of silver nanoparticles embedded hierarchically porous AlPO<sub>4</sub> monoliths 査読有り

Cai, XB; Zhu, WJ; Yang, H; Xu, CY; Nakanishi, K; Kanamori, K; Guo, XZ

NEW JOURNAL OF CHEMISTRY 39 巻 ( 8 ) 頁： 6238 - 6243 2015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：New Journal of Chemistry

Hierarchically porous AlPO4 monoliths with well-defined macropores are prepared via a sol-gel process accompanied by phase separation. Appropriate amounts of the precursors, poly(ethylene oxide) and propylene oxide, allow the formation of a mesoporous structure with uniform macropore size distribution in the gel. A crystalline phase of tridymite forms after heat-treatment at 1000 °C in air, while the meso- and macro-porous structure is preserved, maintaining a BET surface area of 120.8 m2 g-1. The resultant crystalline AlPO4 monolith is used as the host to immobilize silver nanoparticles (Ag NPs) by immersing it in silver colloid under an ambient condition. The result shows that Ag NPs were homogeneously embedded on the surface of skeletons without spoiling the appearance and macroporous structure of the initial AlPO4 monolith. Ag NPs embedded in monolithic AlPO4 show promise in a wide range of applications, including catalysis and separation.

DOI： 10.1039/c5nj00490j

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