【Peer-reviewed Papers】

     TitleAuthorsJournalPages
Single-Step Recovery of Divalent Mn Component from LiMn2O4 Cathode Material at Hydrothermal Conditions as an Mn–Citrate ComplexQingxin Zheng, Kensuke Shibazaki, Tetsufumi Ogawa, and Masaru WatanabeACS Sustainable Chem. Eng. 202110970–1097
Application of hydrothermal leaching technology to spent LIB cathode materials with citric acid using batch-type device and flow systemQingxin Zheng, Kensuke Shibazaki, Tetsufumi Ogawa, Atsushi Kishita, Yuya Hiraga, Masaru WatanabeJournal of Chemical Engineering of Japan 54 (2021)1-7
Sulfonated carbon-catalyzed deamination of alanine under hydrothermal conditionsQingxin Zheng, Takuma Kato, Yuko Ito, Masayoshi Wagatsuma, Yuya Hiraga, Masaru WatanabeThe Journal of Supercritical Fluids 175 (2021)105275
Glycine-assisted hydrothermal leaching of LiCoO2/LiNiO2 cathode materials with high efficiency and negligible acid corrosion employing batch and continuous flow systemQingxin Zheng, Kensuke Shibazaki, Seiya Hirama, Yuta Iwatate, Atsushi Kishita, Yuya Hiraga, Yuta Nakayasu,  Masaru WatanabeACS Sustainable Chemistry & Engineering 9 (2021)3246-3257
Behavior and kinetics of drying, pyrolysis, gasification, and combustion tested by a microfluidized bed reaction analyzer for the staged-gasification processXi Zeng, Jianling Zhang, Mohammed Haruna Adamu, Fang Wang, Zhennan Han, Qingxin Zheng, Lijuan Zhang, and Guangwen XuEnergy & Fuels 34 (2020)2553-2565
Mechanism study on green high-efficiency hydrothermal activation of fly ash and its application prospectLingjun Ma, Yu Feng, Man Zhang, Qingxin Zheng, Bing Wang, Lina Han, Yuping Li, Liping Chang, Weiren Bao, Jiancheng WangJournal of Cleaner Production 275 (2020)122977
Synthesis of unused-wood-derived C-Fe-N catalysts for oxygen reduction reaction by heteroatom doping during hydrothermal carbonisation and subsequent carbonisation in nitrogen atmosphereYasuto GotoYuta Nakayasu, Hiroya Abe, Yuto Katsuyama, Takashi Ito, Masaru WatanabePhilosophical Transactions of the Royal Society A379
Rational route for increasing capacity of hard carbons as sodium-ion battery anodesYuto KatsuyamaYuta Nakayasu, Hiroaki Kobayashi, Yasuto Goto, Itaru Honma, Masaru WatanabeChemSusChem 13 (2020)5762-5768
Supercritical hydrothermal synthesis of MoS2 nanoshets with controllable layer number and phase structureYuki Takahashi, Yuta Nakayasu, Kazuyuki Iwase, Hiroaki Kobayashi, Itaru HonmaDalton Transactions 49 (2020)9377-9384
Hydrothermal leaching of ternary and binary lithium-ion battery cathode materials with citric acid and the kinetic studyQingxin ZhengMasaru Watanabe, Yuta Iwatate, Daiki Azuma. Kensuke Shibazaki, Yuya Hiraga, Atsushi Kishita, Yuta NakayasuThe Journal of Supercritical Fluids 165 (2020)104990
Continuous hydrothermal leaching of LiCoO2 cathode materials by using citric acidQingxin Zheng, Kensuke Shibazaki, Tetsufumi Ogawa, Atsushi Kishita, Yuya Hiraga, Yuta Nakayasu,  Masaru WatanabeReaction Chemistry & Engineering 5 (2020)2148-2154
実リチウムイオン電池廃棄物に対する水熱法を用いた構成金属の有機酸浸出柴﨑 絢祐, 東 大輝, 渡邉 賢, 木下 睦, 平賀 佑也, 宮崎 秀喜化学工学論文集 46(5) (2020)104990
Applied Surface ScienceDefect-Rich Exfoliated MoSe2 Nanosheets by Supercritical Fluid Process as an Attractive Catalyst for Hydrogen Evolution in Water
Quang Duc Truong, Yuta Nakayasu, Quyen T. Nguyen, Duc N. Nguyen, Chuc T. Nguyen, Murukanahally, Kempaiah Devaraju, Dinesh Rangappa, Keiichiro Nayuki, Yoshikazu Sasaki, Phong D. Tra, Takaaki Tomai, Itaru Honma
Applied Surface Science (Accepted) (2020)
CarbonBottom-up synthesis of graphene via hydrothermal cathodic reduction
Takaaki Tomai, Yuta Nakayasu, Yusuke Okamura, Shunichi Ishiguro, Naoki Tamura, Shusuke Katahira, Itaru Honma
Carbon 158 (2020)131 – 136

Resource upgrading in advanced supercritical fluid (supercritical fluid with catalyst and co-solvent): Liquid fuels from biomass in sub and supercritical water & Carbohydrate up-conversion in ionic liquid and supercritical fluids mixtures
Masaru Watanabe, Masayoshi Wagatsuma, Keisuke Suzuki, Takuma Kato, Yasuto Goto, Yukihiro Kanaguri, Yuya HiragaIntech Open
Chemical Engineering Science
A precise deconvolution method to derive methane hydrate cage occupancy ratios using Raman spectroscopy
Yuya Hiraga, Takuya Sasagawa, Shinichiro Yamamoto, Hiroyuki Komatsu, Masaki Ota, Takao Tsukada, Richard L. Smith, Jr.Chemical Engineering Science 214 (2020)115361
クエン酸を用いたコバルト酸リチウムの水熱酸浸出における速度論解析 (2019年度 化学工学会 優秀論文賞)東大輝, 相川達也, 平賀佑也, 渡邉賢.化学工学論文集.  45(4) (2019)147-157
Go to journal home page - The Journal of Supercritical Fluids
Hydrogen gas-free processes for single-step preparation of transition-metal bifunctional catalysts and one-pot γ-valerolactone synthesis in supercritical CO2-ionic liquid systems
Haixin Guo, Yuya Hiraga, Xinhua Qi, Richard L. Smith, Jr.The Journal of Supercritical Fluids, vol. 147 (2019)263-27  
View Articles published in Fluid Phase Equilibria
Methane clathrate hydrate dissociation analyzed with Raman spectroscopy and a thermodynamic mass transfer model considering cage occupancy
Hiroyuki Komatsu, Takuya Sasagawa, Shinichiro Yamamoto, Yuya Hiraga, Masaki Ota, Takao Tsukada, Richard L. Smith, Jr.Fluid Phase Equilibria, 489 (2019)41-47
Go to journal home page - Fluid Phase Equilibria
Measurement and modeling of infinite dilution activity coefficients of organic compounds in an equimolar ionic liquid mixture of [Bmim]Cl and [Bmim][Tf2N]
Shida Tomoka, Hiraga Yuya, Sugiyama Takuya, Sato Yoshiyuki, Watanabe Masaru, Smith Richard L. JrFLUID PHASE EQUILIBRIA 488 (2019)72 – 78

イオン液体[Bmim]Cl中でのキチンモノマーN-アセチルグルコサミン(GlcNAc)のフラン化合物への転換反応に与えるLewis酸およびBrønsted酸の影響
東 大輝, 吉井 孝彰, 渡邉 賢, 平賀 佑也, Smith Jr. Richard L., 尾形 慎, 長田 光正化学工学論文集 45(4) (2019)147-157
Nature Communications
N-formyl-stabilizing quasi-catalytic species afford rapid and selective solvent-free amination of biomass-derived feedstocks
Li Hu, Guo Haixin, Su Yaqiong, Hiraga Yuya, Fang Zhen, Hensen Emiel J. M, Watanabe Masaru, Smith Richard Lee JNATURE COMMUNICATIONS 10(1) (2019)1-13
水熱とイオン液体を軸とした高圧流体による資源変換に関する基礎的検討平賀 佑也, 渡邉 賢高圧力の科学と技術, 29(3), 206-216 (2019)206-216

Rapid synthesis of defective and composition-controlled metal chalcogenide nanosheets by supercritical hydrothermal processing
Yuta Nakayasu, Siobhan Bradley, Hiroaki Kobayashi, Keiichiro Nayuki, Yoshikazu Sasaki, Takaaki Tomai, Thomas Nann, Itaru HonmaNanoscale Advances 1(9) (2019)3383 – 3387

Quinone-based Redox Supercapacitor Using Highly Conductive Hard Carbon Derived from Oak Wood (Front Cover)
Yuto Katsuyama, Yuta Nakayasu, Kotaro Oizumi, Yui Fujihara, Hiroaki Kobayashi, Itaru HonmaAdvanced Sustainable Systems 3 (2019)1900083

【International Conferences】

     TitleAuthorsConferencePlace

Hydrothermal leaching of commercial and spent lithium-ion battery cathode materials with citric acid employing batch and continuous flow system
Qingxin Zheng, Kensuke Shibazaki, Seiya Hirama, Tetsufumi Ogawa, Akitoshi Nakajima, Yuya Hiraga, Atsushi Kishita, Masaru Watanabe (invited lecture)18th European Meeting on Supercritical fluids (2021)Bordeaux, France

5-Hydroxymethylfurfural production and extraction by solid acid-catalyzed fructose dehydration in supercritical CO2−water two-phase system
Kosuke Ebina, Yuya Hiraga, Hélène Labauze, Séverine Camy, Jean-Stéphane Condoret, Masaru Watanabe18th European Meeting on Supercritical fluids (2021)Bordeaux, France

Rapid fabrication of metallic MoS2 thin film by hydrothermal electrodeposition for electrocatalytic hydrogen evolution reaction
Y. Nakayasu, S. Katahira, H. Kobayashi, I. Honma18th Asian Pacific Confederation of Chemical Engineering CongressSapporo Japan 

High utilization of Anthraquinone as anode active material of organic redox supercapacitor using wood-derived hard carbon. (Best Oral Presentation Award)
Yuto Katsuyama, Yuta Nakayasu, Kotaro Oizumi, Yui Fujihara, Hiroaki Kobayashi, Itaru HonmaThe 3rd ECS Yamagata University Student Chapter SymposiumYamagata, Japan
Titelbild des Flyers
Supercapacitors employing oak-wood-derived porous carbons impregnated with quinones
Yuto Katsuyama, Yuta Nakayasu, Kotaro Oizumi, Yui Fujihara, Hiroaki Kobayashi, Itaru HonmaOrganic Battery Days 2019Jena, Germany

【Domestic Conferences】

     TitleAuthorsConferencePlace

Glycine-assisted hydrothermal leaching of LiCoO2 cathode materials with a continuous flow system (Poster in English)
Seiya HiramaQingxin Zheng, Atsushi Kishita, Yuya Hiraga, Yuta Nakayasu, Masaru WatanabeSCEJ 86th Annual Meeting (2021)Online

水熱炭化・ヘテロ原子ドープ法を用いた木質由来電極材料の開発
後藤泰斗中安祐太, 阿部博弥, 勝山湧斗, 伊藤隆, 渡邉賢化学工学会第86回年会Online

木質バイオマス由来炭素材料の電池電極への応用
中安祐太 (招待)第10回フラーレン・ナノチューブ・グラフェン若手研究会Online

Naイオン電池負極脱挿入容量とハードカーボン層間総面積の高相関性
勝山湧斗中安祐太, 小林弘明, 後藤泰斗, 本間格, 渡邉賢第47回炭素材料学会年会Online

水熱炭化法を用いた木質由来炭化物の酸素還元合成プロセス
後藤泰斗中安祐太, 阿部博弥, 勝山湧斗, 伊藤隆, 渡邉賢第18回木質炭化学会研究発表会Online

白炭のNaイオン二次電池負極特性
勝山湧斗中安祐太, 小林弘明, 後藤泰斗, 本間格, 渡邉賢第18回木質炭化学会研究発表会Online

里山発のグリーンデバイス
中安祐太 (招待)第22回先端研究発表会Miyagi, Japan

超臨界二酸化炭素-水二相系における5-ヒドロキシメチルフルフラール合成・抽出プロセスに関する基礎的研究
蝦名宏祐, 平間聖也, 平賀佑也, 渡邉賢第 22 回先端研究発表会Miyagi, Japan

Phase behavior of ionic liquid with biomass-based molecules and hydrogen in the presence of supercritical CO2 for green biomass refinery
Yuya Hiraga化学系学協会東北大会Yamagata, Japan




超臨界CO2を用いた使用済み活性炭の再生における活性炭加熱操作の影響後藤 泰斗, 佐藤 義之, 猪股 宏第8回 JACI/GSCシンポジウム2019Tokyo, Japan




流通式装置を用いた超臨界二酸化炭素-水間における5-HMFの分配係数測定平間聖也,平賀佑也,渡邉賢第 21 回先端研究発表会Miyagi, Japan




ナラ白炭を担持材として用いた有機キノンレドックスキャパシタ勝山湧斗, 中安祐太, 藤原優衣, 本間格第17回木質炭化学会Tokyo, Japan




固体触媒を用いたイオン液体中でのキチンの加水分解小林拓矢, 吉井孝彰, 平賀佑也, 渡邉賢第 21 回先端研究発表会Miyagi, Japan

【Awards】

特許/特開TitleAuthorsConferencePlace

水熱炭化法を用いた木質由来炭化物の酸素還元合成プロセス
後藤泰斗中安祐太, 阿部博弥, 勝山湧斗, 伊藤隆, 渡邉賢第18回木質炭化学会研究発表会Online, Japan

【Patent】

特許TitleAuthorsNumber
特願2020-103916
多孔質体、多孔質体の製造方法、電極材料および蓄電装置
中安祐太, 本間格, 勝山湧斗
特願2021-024718
高結晶性炭素の製造方法、その前駆体の製造方法、および前駆体
中安祐太, 後藤泰斗, 渡邉賢, 伊藤隆

【Other Activities】

TitleLinkPlace
2019/8/30
東北大学サイエンスカフェにて講演 第167回「超臨界で天然物がお宝に?~新しい食品加工と廃棄物処理技術~」
クリックYamagata, Japan
2019/2/17
子供化学実験教室 in 川崎町
Tokyo, Japan