Faculty Profiles - ICHINO, Ryoichi

Papers - ICHINO, Ryoichi

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Room-Temperature Bulk Supramolecular Polymer Based on C<inf>3</inf>-Symmetrical Benzene-1,3,5-tricarboxamides Having Two-Armed Alkyl Groups as Side Chains Reviewed International journal

Ishigaki Y., Yamanaka M., Hagio T., Ichino R.

ChemistrySelect Vol. 8 ( 35 ) 2023.9

Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：ChemistrySelect

To develop a bulk supramolecular polymer based on 1,3,5-benzenetricarboxamide (BTA) without crystallinity at room temperature, C3-synmetrical BTA derivatives with two-armed alkyl groups were synthesized and characterized. IR and XRD measurements of the BTA derivatives suggested that the higher-order structure obtained using these materials was hexagonal columnar, owing to the characteristic three-fold hydrogen bonding. In DSC measurements, BTA having 10-nonadecyl groups (10NDBTA) showed only a single transition point at 233 °C and maintained its mesophase down to −50 °C, whereas the other BTA derivatives showed a transition peak in the range of 20 to 131 °C and another in the range of 204 to 239 °C, corresponding to alkyl melting and dissociation of the stacked BTA cores, respectively. 13C-SSNMR measurement of 10NDBTA indicated that not only the 10-nonadecyl groups of the side chains but also the BTA cores forming the main chain of the supramolecular polymer show a unique high mobility even at ambient temperature.

DOI： 10.1002/slct.202300805

Scopus

Utilization of agricultural waste to herbicide removal: Magnetic BEA zeolite adsorbents prepared by dry-gel conversion using rice husk ash–derived SiO<inf>2</inf> for paraquat removal Reviewed International coauthorship International journal

Phouthavong V., Hagio T., Park J.H., Nijpanich S., Srihirunthanon T., Chantanurak N., Duangkhai K., Rujiravanit R., Chounlamany V., Phomkeona K., Kong L., Li L., Ichino R.

Arabian Journal of Chemistry Vol. 16 ( 8 ) 2023.8

Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：Arabian Journal of Chemistry

This study presents a method that will allow for the sustainable utilization of rice husk ash-SiO2 (RHAS), an agricultural-waste–derived material, as a bulky solid SiO2 source in the zeolite beta (BEA)/Fe3O4 composite (magnetic RHAS-BEA) synthesis via a dry-gel conversion method for the removal of paraquat, a typical herbicide, from aqueous solutions. Ultrasonic waves were used to facilitate the formation of uniform Fe3O4-contained dry precursor gel before converting to the magnetic BEA zeolite composite for the first time. Magnetic RHAS-BEA was then characterized and compared with a non-magnetic sample (RHAS-BEA) using X-ray diffraction and field-emission scanning electron microscopy. In terms of adsorption, we found that paraquat had a high adsorption rate on the samples and conformed to a pseudo-second-order kinetic model. The adsorption behavior of paraquat on the synthesized RHAS-BEA and magnetic RHAS-BEA obeyed the Langmuir adsorption isotherm model. The synthesized adsorbents were reusable for at least four cycles, via thermal regeneration at 450 °C. The inclusion of Fe3O4 particles in magnetic RHAS-BEA disrupted neither the crystallization of the BEA zeolite nor the adsorption of paraquat and enabled easy collection via an external magnet.

DOI： 10.1016/j.arabjc.2023.104959

Scopus

An effective strategy for improving the performance of electrodeposited Fe-W alloy plating: Tailoring microstructure by graphene incorporation Reviewed International coauthorship International journal

Shinohara Y., Park J.H., Hagio T., Kim J.I., Lee W.Y., Umehara N., Ichino R.

Materials and Design Vol. 230 2023.6

Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：Materials and Design

Despite the excellent performance of hard Cr plating using hexavalent chromium (Cr6+), its use is being restricted owing to recent environmental regulations. Electrodeposited Fe-W alloy is considered a possible alternative, but its high coefficient of friction (COF), high wear rate owing to tribo-oxidation, and high corrosion rate hinder its practical application. In this study, we attempted to solve these problems by modifying the microstructure of Fe-W alloy by incorporating 2D-structured graphene. The effect of graphene incorporation on the structure of the Fe-W alloy and its properties, especially microhardness, wear, and corrosion resistance, were investigated. The results showed the graphene effectively modified the columnar structure of the Fe-W alloy by inhibiting the vertical growth of clusters during electrodeposition, leading to fragmentation of the vertical cluster boundaries. This improved the hardness by as much as 17 % up to 9.1 GPa, and the corrosion resistance by changing the corrosion mechanism from localized corrosion to uniform corrosion. In addition, the graphene reduced the COF and wear rate by reducing the Fe2O3 formed by tribo-oxidation to a lower oxidation state. The structural modification of the plating by graphene incorporation thus provides an effective solution to improving the performance of Fe-W alloys.

DOI： 10.1016/j.matdes.2023.111938

Scopus

Preliminary Study on Electrodeposition of Copper Platings and Codeposition of Carbon Nanotubes from Organic Solvent Reviewed International journal

Park J.H., Fujita Y., Hagio T., Phouthavong V., Kamimoto Y., Bessho T., Ichino R.

Coatings Vol. 13 ( 4 ) 2023.4

Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：Coatings

Metal/carbon composite plating is an effective strategy for improving and adding properties to metal plating by incorporating carbon materials into the metal matrices. Copper (Cu) is widely applied, particularly in the areas of heat management and electronic packaging owing to its high thermal and electrical conductivities, which can be further improved together with improvements in mechanical properties by compositing it with carbon nanotubes (CNTs). However, because hydrophobic CNTs are hardly dispersible in aqueous solutions, additional intense acid treatment or the addition of dispersants is required for their dispersion. Moreover, previous studies have reported that these methods suffer from deterioration of composite material performance through the destruction of the CNT surface or the inclusion of dispersants into the plating. Therefore, in this study, the electrodeposition of a Cu/CNT composite in a non-aqueous solvent that can disperse CNTs without any additional treatment is investigated. The experimental results show that it is possible to deposit Cu from a N-methyl-2-pyrrolidone containing copper iodide and potassium iodide. Furthermore, Cu/CNT composite platings containing CNTs up to 0.12 mass% were prepared by constant current electrolysis, and applying pulse electrolysis can increase the CNTs content up to 0.22 mass%.

DOI： 10.3390/coatings13040802

Scopus

Magnetic Adsorbents for Wastewater Treatment: Advancements in Their Synthesis Methods Reviewed International coauthorship International journal

Phouthavong V., Yan R., Nijpanich S., Hagio T., Ichino R., Kong L., Li L.

Materials Vol. 15 ( 3 ) 2022.2

Nano ferric oxide adsorbents with self-acidification effect for efficient adsorption of Sb(V) Reviewed International coauthorship International journal

Chemosphere Vol. 272 page： 129933 2021.6

Facile Hydrothermal Synthesis of EAB-Type Zeolite under Static Synthesis Conditions Reviewed International coauthorship International journal

Hagio Takeshi, Park Jae-Hyeok, Lin Yan, Tian Yanqin, Hu Yun Hang, Li Xinling, Kamimoto Yuki, Ichino Ryoichi

CRYSTAL RESEARCH AND TECHNOLOGY Vol. 56 ( 4 ) 2021.4

Development of novel nanoporous hexagonal tungsten oxide membrane for separation of water/acetic acid mixtures via pervaporation Reviewed International journal

Kunishi Hiroto, Hagio Takeshi, Wada Shintaro, Kamimoto Yuki, Ichino Ryoichi

JOURNAL OF MEMBRANE SCIENCE Vol. 620 2021.2

Synthesis of C-Plane Oriented Hexagonal Tungsten Oxide Membranes on Tubular Substrates and Their Acetic Acid/Water Separation Performances Reviewed International coauthorship International journal

Kunishi Hiroto, Wada Shintaro, Kamimoto Yuki, Ichino Ryoichi, Lin Yan, Kong Long, Li Liang, Hagio Takeshi

MEMBRANES Vol. 11 ( 1 ) page： 1 - 17 2021.1

Electrodeposition of nano-diamond/copper composite platings: Improved interfacial adhesion between diamond and copper via formation of silicon carbide on diamond surface Reviewed International journal

SURFACE & COATINGS TECHNOLOGY Vol. 403 2020.12

Electrodeposition of a Novel Ternary Fe-W-Zn Alloy: Tuning Corrosion Properties of Fe-W Based Alloys by Zn Addition Reviewed International journal

JOURNAL OF THE ELECTROCHEMICAL SOCIETY Vol. 167 ( 13 ) 2020.10

Rapid determination of iron concentration in wastewater using color band formation Reviewed International journal

SN APPLIED SCIENCES Vol. 2 ( 9 ) 2020.9

Improvement in corrosion resistance of ternary Zn-Fe-Mo plating by additional Mo-oxide coating Reviewed International coauthorship International journal

SURFACE & COATINGS TECHNOLOGY Vol. 389 2020.5

Selective recovery of indium via continuous counter-current foam separation from sulfuric acid solutions II - Optimization of operational parameters on separation performance Reviewed International journal

SEPARATION AND PURIFICATION TECHNOLOGY Vol. 238 2020.5

Development of Synthetic Magnetic Zeolite Adsorbents and Application to Ammonium Ion Removal Reviewed International coauthorship International journal

KSCE JOURNAL OF CIVIL ENGINEERING Vol. 24 ( 5 ) page： 1395 - 1399 2020.5

Enhancement of corrosion resistance by lamination of Mg film on Zn-55Al-1.6Si-coated steel by physical vapor deposition Reviewed International coauthorship International journal

SURFACE & COATINGS TECHNOLOGY Vol. 387 2020.4

Magnetic BEA-type zeolites: preparation by dry-gel conversion method and assessment of dye removal performance Reviewed International coauthorship International journal

JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT Vol. 22 ( 2 ) page： 375 - 382 2020.3

Electrochemical behavior of tungsten carbide-cobalt alloy using molten hydroxide as electrolyte under low temperature Reviewed International coauthorship International journal

JOURNAL OF MATERIAL CYCLES AND WASTE MANAGEMENT Vol. 22 ( 2 ) page： 348 - 353 2020.3

Nickel-carbon composite plating using a Watts nickel electroplating bath Reviewed International coauthorship International journal

SN APPLIED SCIENCES Vol. 2 ( 2 ) 2020.2

Development of magnesium-iron layered double hydroxide and application to nitrate removal Reviewed International coauthorship International journal

Kamimoto Yuki, Okamoto Naoki, Hagio Takeshi, Yong-Jun Jung, Deevanhxay Phengxay, Ichino Ryoichi

SN APPLIED SCIENCES Vol. 1 ( 11 ) 2019.11

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Papers - ICHINO, Ryoichi