研究者詳細 - 市野　良一

論文 - 市野　良一

分割表示 192 件中 41 - 60 件目／全件表示 >>

Aluminum Electrodeposition on the Surface of Boron Carbide Ceramics by Use EMIC–AlCl<inf>3</inf> Ions Liquid 査読有り

Gou R., Park J.H., Yamashita S., Hagio T., Ichino R., Kita H.

Coatings 12 巻 ( 10 ) 2022年10月

記述言語：英語出版者・発行元：Coatings

Coating technology is decisively important for metallization of ceramic materials and ceramic metal sealing technology. Previous studies have shown that the network-like structure after penetration of molten aluminum can significantly improve the strength of joint components. However, the direct aluminum coating method is limited by the shape of the substrate. To obtain a dense aluminum film on the surface of B4C, in this study, aluminum was deposited by pulse electroplating in EMIC–AlCl3 ionic liquid. The deposited metals were observed and analyzed by SEM–EDS and XRD. A Vickers hardness tester was adopted as an auxiliary equipment to clarify the film quality. The results show that frequency and duty cycle have significant effects on crystal orientation. The content of oxides in the contact gap reduces the bonding strength of the deposited metal, which provides experimental basis for metal electrodeposition on B4C.

DOI： 10.3390/coatings12101535

Scopus

Facile synthesis of amine-functionalized three-dimensional graphene composites for CO2 capture 査読有り国際共著

Sun Hefei, Zhang Qinggang, Hagio Takeshi, Ryoichi Ichino, Kong Long, Li Liang

SURFACES AND INTERFACES 33 巻 2022年10月

Amine-Modified Small Pore Mesoporous Silica as Potential Adsorbent for Zn Removal from Plating Wastewater 査読有り

Phouthavong V., Park J.H., Nishihama T., Yoshida S., Hagio T., Kamimoto Y., Ichino R.

Coatings 12 巻 ( 9 ) 2022年9月

担当区分：最終著者記述言語：英語出版者・発行元：Coatings

The removal of Zn from wastewater generated from the Zn-based electroplating manufacturing process is essential because the regulation limit of Zn concentration in wastewater is becoming stricter in Japan. However, achieving this through conventional methods is difficult, especially for small and medium enterprises in the plating industry. Therefore, a suitable Zn-removal method with a low cost but high performance and Zn selectivity is required. The application of adsorbents is one possible solution. Mesoporous silica (MS) is a well-known adsorbent with controllable pore size, high specific surface area (SSA), high acid resistance, and ease of surface modification. In this study, we modified the surfaces of MSs with different initial pore sizes by amino groups and investigated their Zn removal performances. The effect of pore size on amine modification using (3-aminopropyl)triethoxysilane and on adsorption performance in a single system was investigated along with Zn adsorption selectivity in the Zn–Ni binary system. Amine-modified MS prepared from MS with an initial pore size of 1.9 nm showed drastically lower performance compared to those prepared from MS with an initial pore size larger than 2.8 nm. Zn-selectivity in the Zn–Ni binary system, containing equal amounts of Zn and Ni, was found to reach a maximum of 21.6 when modifying MS with an initial pore size of 2.8 nm.

DOI： 10.3390/coatings12091258

Scopus

Effect of Zn-Mg interlayer on the corrosion resistance of multilayer Zn-based coating fabricated by physical vapor deposition process 査読有り国際共著

Park J.H., Ko K.P., Hagio T., Ichino R., Lee M.H.

Corrosion Science 202 巻 2022年7月

記述言語：英語出版者・発行元：Corrosion Science

A novel Zn/Zn-Mg/Zn multilayer coating is prepared on steel plate by PVD. The effect of the multilayer structure comprising Zn-Mg interlayer on the corrosion resistance is discussed. The corrosion resistance is evaluated by the salt spray test, and the corrosion progression is analyzed by electrochemical impedance spectroscopy and corrosion products observation. Eluted Mg ions from the Zn-Mg interlayer form a porous Mg corrosion product layer that permeates chlorine ions, assists the coating transform to Zn5(OH)8Cl2·H2O phase. Improved corrosion resistance of the coating can be explained by the rapid increasement of the impedance by the formation of the protective Zn5(OH)8Cl2·H2O phase.

DOI： 10.1016/j.corsci.2022.110330

Scopus

Electrodeposition of Amorphous Molybdenum Oxide on Iron-Group Element Based Plating and its Novel Application as a Corrosion Protective Coating 査読有り国際共著

Park J.H., Hagio T., Nijpanich S., Chanlek N., Chaiprapa J., Songsiriritthigul C., Songsiriritthigul P., Ichino R.

Journal of the Electrochemical Society 169 巻 ( 7 ) 2022年7月

記述言語：英語出版者・発行元：Journal of the Electrochemical Society

The corrosion resistance of materials composed of metal is an essential property for preventing material deterioration caused by corrosion. In this study, we demonstrate that corrosion resistance can be significantly improved through the electrodeposition of molybdenum oxide onto a metal plating containing iron-group elements. Mo oxide can be electrodeposited using a simple plating bath, low current density, and short deposition time, exhibiting a fascinating metallic gloss appearance. GI-XRD and XPS analyses revealed that amorphous Mo oxide adhered to the substrate by a seed layer partially reduced to metallic Mo by the iron-group element in the substrate, based on the principle of "induced co-deposition."A Mo oxide coating with a thickness of approximately 100 nm decreases the corrosion current density of Ni-W plating by approximately 5 times and the passivation current density by approximately 10 times in a 3 mass% NaCl solution. Mo oxide coatings represent an attractive strategy for improving the corrosion resistance of various metal materials containing iron-group elements.

DOI： 10.1149/1945-7111/ac7e78

Scopus

Simultaneous reduction and sequestration of hexavalent chromium by magnetic β-Cyclodextrin stabilized Fe<inf>3</inf>S<inf>4</inf> 査読有り国際共著国際誌

Kong L., Yan R., Liu M., Xu J., Hagio T., Ichino R., Li L., Cao X.

Journal of Hazardous Materials 431 巻頁： 128592 2022年6月

A tri-layer floating photocatalyst/adsorbent for the removal of organic compounds from wastewater: Layer-by-layer deposition of silicalite-1 and titania on hollow glass microspheres 査読有り国際共著国際誌

Nijpanich S., Hagio T., Murase K., Park J.H., Kamimoto Y., Sakdapipanich J., Terashima C., Chanlek N., Ichino R.

Environmental Technology and Innovation 26 巻 2022年5月

Impedance Characteristics of Monolayer and Bilayer Graphene Films with Biofilm Formation and Growth 査読有り国際共著

Nakagawa R., Saito K., Kanematsu H., Miura H., Ishihara M., Barry D.M., Kogo T., Ogawa A., Hirai N., Hagio T., Ichino R., Ban M., Yoshitake M., Zimmermann S.

Sensors 22 巻 ( 9 ) 2022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：Sensors

Biofilms are the result of bacterial activity. When the number of bacteria (attached to materials’ surfaces) reaches a certain threshold value, then the bacteria simultaneously excrete organic polymers (EPS: extracellular polymeric substances). These sticky polymers encase and protect the bacteria. They are called biofilms and contain about 80% water. Other components of biofilm include polymeric carbon compounds such as polysaccharides and bacteria. It is well-known that biofilms cause various medical and hygiene problems. Therefore, it is important to have a sensor that can detect biofilms to solve such problems. Graphene is a single-atom-thick sheet in which carbon atoms are connected in a hexagonal shape like a honeycomb. Carbon compounds generally bond easily to graphene. Therefore, it is highly possible that graphene could serve as a sensor to monitor biofilm formation and growth. In our previous study, monolayer graphene was prepared on a glass substrate by the chemical vapor deposition (CVD) method. Its biofilm forming ability was compared with that of graphite. As a result, the CVD graphene film had the higher sensitivity for biofilm formation. However, the monolayer graphene has a mechanical disadvantage when used as a biofilm sensor. Therefore, for this new research project, we prepared bilayer graphene with high mechanical strength by using the CVD process on copper substrates. For these specimens, we measured the capacitance component of the specimens’ impedance. In addition, we have included a discussion about the possibility of applying them as future sensors for monitoring biofilm formation and growth.

DOI： 10.3390/s22093548

Scopus

PubMed

光触媒を用いたダイヤモンドのアミノ基修飾と銅基質に対する高分散複合化技術査読有り

加藤華月, 石田直哉, 鈴木孝宗, 藤本憲次郎, 萩尾健史, 市野良一, 近藤剛史, 湯浅真, 上塚洋, 藤嶋昭, 寺島千晶

表面技術 72 巻 ( 12 ) 頁： 701 - 703 2021年12月

Preparation of amino group functionalized diamond using photocatalyst and thermal conductivity of diamond/copper composite by electroplating 査読有り国際誌

Diamond and Related Materials 118 巻 2021年10月

Evenly distribution of amorphous iron sulfides on reconstructed Mg-Al hydrotalcites for improving Cr(VI) removal efficiency 査読有り国際共著国際誌

Yan R., Feng X., Kong L., Wan Q., Zheng W., Hagio T., Ichino R., Cao X., Li L.

Chemical Engineering Journal 417 巻 2021年8月

Electroplating of copper/microdiamond composites and the effect of diamond surface functionalization 査読有り国際誌

Functional Materials Letters 14 巻 ( 5 ) 2021年7月

Effect of SiC formation temperature on improvement in thermal conductivity of electrodeposited SiC-coated diamond/Cu composite plating 査読有り国際誌

Naruse Yuto, Park Jae-Hyeok, Hagio Takeshi, Kamimoto Yuki, Bessho Takeshi, Ryoichi Ichino

COMPOSITE INTERFACES 29 巻 ( 3 ) 2021年6月

The effect of bath pH on electrodeposition and corrosion properties of ternary Fe-W-Zn alloy platings 査読有り国際誌

Journal of Solid State Electrochemistry 25 巻 ( 6 ) 頁： 1901 - 1913 2021年6月

Band Gap Engineering toward Wavelength Tunable CsPbBr<inf>3</inf>Nanocrystals for Achieving Rec. 2020 Displays 査読有り国際共著国際誌

Chemistry of Materials 33 巻 ( 10 ) 頁： 3575 - 3584 2021年5月

Electrodeposition of ni-w/cnt composite plating and its potential as coating for pemfc bipolar plate

Park J.H., Wada T., Naruse Y., Hagio T., Kamimoto Y., Ryoichi I.

Coatings 10 巻 ( 11 ) 頁： 1 - 14 2020年11月

記述言語：日本語出版者・発行元：Coatings

In this study, Ni-W/carbon nanotube (CNT) composite platings are electrodeposited onto steel plate as a possible coating material for the polymer electrolyte membrane fuel cell (PEMFC) bipolar plate, which requires high corrosion resistance under acidic environment and low contact resistance. The dispersibility of CNT in the plating bath is improved by surface modification of CNT through hydrothermal treatment in mixed acid solution. The change in electrodeposition behavior of Ni-W plating by CNT addition is investigated by cathodic polarization measurement. The corrosion resistance under acidic environment is evaluated using 0.5M H2 SO4 solution and contact resistance of the composite platings is measured and compared with Ni and Ni-W plating. The surface modification of CNT through hydrothermal treatment is found to increase the CNT content in the Ni-W/CNT composite plating up to 0.33 mass.% and sufficient incorporation of hydrothermally treated CNT in Ni-W plating results in low contact resistance and enhanced corrosion resistance than pristine Ni-W plating.

DOI： 10.3390/coatings10111095

Scopus

Floating Adsorbent for Organic Removal Fabricated Through Crystallization of Silicalite-1 on Hollow Glass Microspheres 査読有り国際誌

Nijpanich Supinya, Hagio Takeshi, Kamimoto Yuki, Ichino Ryoichi

SCIENCE OF ADVANCED MATERIALS 12 巻 ( 2 ) 頁： 173 - 179 2020年2月

Investigation on Strontium Adsorption Selectivity of Hydrothermally Synthesized Layered Sodium Titanates 査読有り国際誌

Kunishi Hiroto, Hagio Takeshi, Kamimoto Yuki, Ichino Ryoichi

SCIENCE OF ADVANCED MATERIALS 12 巻 ( 2 ) 頁： 186 - 190 2020年2月

Evaluation of the Interactions Between Palladium(Ⅱ) and N,N'-Dimethyl-N,N'-di-n-hexyl-thiodiglycolamide in the Presence of Surfactants Using Capillary Electrophoresis 査読有り国際誌

Tanaka Nana, Kitagawa Shinya, Ohtani Hajime, Iwama Yuki, Kondo Koichiro, Ishigaki Yuzo, Shibata Nobuyuki, Kinoshita Takehiko, Kamimoto Yuki, Ichino Ryoichi

CHROMATOGRAPHY 40 巻 ( 2 ) 頁： 59 - 63 2019年6月

Preparation of a floating photocatalyst via electroless Ni-P-TiO2 composite plating on polypropylene balls for wastewater treatment 査読有り国際共著国際誌

Nijpanich S., Kamimoto Y., Hagio T., Ichino R.

Journal of Water and Environment Technology 17 巻 ( 3 ) 頁： 131 - 140 2019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：公益社団法人日本水環境学会

Application of photocatalysts is among the most promising methods to eliminate organic pollutants in wastewater. A photocatalytic reaction, which involves the generation of reactive radicals from the reaction on the photocatalyst's surface and their interaction with organic molecules, can degrade organic pollutants. Titanium dioxide (TiO2) is a well-known photocatalyst because it has low toxicity and cost including high chemical stability. However, it cannot be efficiently activated in water because of the difficulty in adsorbing ultraviolet light. In this work, a floating photocatalyst was prepared by combining TiO2, Ni-P plating, and a polypropylene (PP) hollow ball substrate. An Ni-P coating was electrolessly deposited on the PP hollow ball in the presence of TiO2. The prepared photocatalyst was characterized using X-ray diffraction and scanning electron microscopy-energy-dispersive X-ray spectroscopy. The PP hollow ball substrate was sufficiently covered with the Ni-P coating and Ti was confirmed to be contained in the Ni-P coating. The obtained specimen floated when placed in aqueous solutions and its photocatalytic activity was confirmed through degradation of methylene blue. In addition, the Ni-P plating was found to protect PP from degrading by photocatalytic activity of the TiO2.

DOI： 10.2965/jwet.18-039

Scopus

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