コンノ　ヒロキ   Konno Hiroki   今野　大輝    所属   東邦大学  理学部 生命圏環境科学科    職種   准教授
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Surfactant-assisted synthesis of nanocrystalline zeolitic imidazolate framework 8 and 67 for adsorptive removal of perfluorooctane sulfonate from aqueous solution
掲載誌名	正式名：Catalysis Today
巻・号・頁	352,pp.220-226
著者・共著者	Hiroki Konno,Yuta Nakasaka,Kousuke Yasuda,Miho Omata,Takao Masuda
担当区分	筆頭著者,責任著者
発行年月	2020
概要	© 2020 Elsevier B.V. Nanocrystalline zeolitic imidazolate frameworks 8 and 67 (ZIF-8 and ZIF-67) were prepared via surfactant-assisted synthesis in aqueous solution at room temperature. The synthesis without surfactant yielded crystal sizes for ZIF-8 and ZIF-67 of 1.19 and 2.95 μm, respectively. However, their crystal sizes obtained via surfactant-assisted synthesis were 81 and 150 nm, respectively. The Brunauer–Emmett–Teller (BET) surface area and micropore volume remained almost constant regardless of the crystal size. TGA analysis confirmed that ZIF-8 and ZIF-67 have sufficient thermal resistance for water treatment. Highly crystalline ZIF-8 and ZIF-67 with different crystal sizes could be obtained, and these ZIF crystals were used as adsorbents for adsorptive removal of perfluorooctane sulfonate (PFOS) from aqueous solution. The amount of PFOS adsorbed by ZIF-67 (734.7 mg-PFOS/g-ZIF-67) was considerably higher than that absorbed by zeolite, activated carbon, and ZIF-8. Additionally, the crystal downsizing was effective in improving the adsorption rate, and adsorption equilibrium was reached faster by nanocrystalline ZIF-67 than by macrocrystalline ZIF-67. This feature makes nanocrystalline ZIF-67 one of the most effective and promising adsorbents for removing PFOS from aqueous solution.