title: Size- and morphology-controlled NH2-MIL-53(Al) prepared in DMF-water mixed solvents.
abstract: We present here a simple solvothermal method to fabricate metal-organic framework NH2-MIL-53(Al) crystals with controllable size and morphology just by altering the ratio of water in the DMF-water mixed solvent system without the addition of any surfactants or capping agents. With increasing the volume ratio of water in the mixed solvents, a series of NH2-MIL-53(Al) crystals with different sizes and morphologies were synthesized. The average size of the smallest crystal is 76 ± 20 nm, which provides us a simple and environmentally friendly way to prepare nanoscale MOFs. The largest BET surface area of these samples is 1882 m(2) g(-1) that is mainly contributed by its micropore surface area, and its corresponding micropore volume is 0.83 cm(3) g(-1), which have greatly extended its application in the fields of gas adsorption and postsynthetic modification. All these samples were characterized by SEM, XRD, N2 adsorption/desorption, TGA and FT-IR. Then a mechanism for the impact of the water ratio on the crystal size and morphology is presented and discussed.
authors.affiliation: State Key Laboratory of Fine Chemicals, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, PR China.
authors.forename: Xinquan
authors.initials: X
authors.lastname: Cheng
authors.forename: Anfeng
authors.initials: A
authors.lastname: Zhang
authors.forename: Keke
authors.initials: K
authors.lastname: Hou
authors.forename: Min
authors.initials: M
authors.lastname: Liu
authors.forename: Yingxia
authors.initials: Y
authors.lastname: Wang
authors.forename: Chunshan
authors.initials: C
authors.lastname: Song
authors.forename: Guoliang
authors.initials: G
authors.lastname: Zhang
authors.forename: Xinwen
authors.initials: X
authors.lastname: Guo
mesh_terms: D004126:Dimethylformamide / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010316:Particle Size; D012997:Solvents / Q000737:chemistry; D013499:Surface Properties; D014867:Water / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D012997:Solvents; D014867:Water; D004126:Dimethylformamide