title: Amino acid assisted templating synthesis of hierarchical zeolitic imidazolate framework-8 for efficient arsenate removal.
abstract: We report the strategy of using the cationic surfactant cetyltrimethylammonium bromide (CTAB) and amino acid L-histidine (His) as co-templates to produce hierarchical ZIF-8 in an aqueous system at room temperature. The hierarchical ZIF-8 had both meso- and microporous structure, resulting in a high mesopore volume as well as specific surface area which can be controlled by the synthesis conditions. We put forward the hypothesis for the formation of a mesoporous structure and the enhancement of the porosity of ZIF-8 that the histidine plays a key role on the stabilization of CTAB micelles and avoiding the production of unexpected by-products therefore promotes the fabrication of pure phase ZIF-8 containing the mesopores interconnected with micropores. The prepared hierarchical ZIF-8 exhibited an excellent performance as a new kind of porous absorbent for efficient removal of the toxic arsenate.
authors.affiliation: College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Siping Rd 1239, 200092 Shanghai, China. fengting@tongji.edu.cn.
authors.forename: Yi-nan
authors.initials: YN
authors.lastname: Wu
authors.forename: Meimei
authors.initials: M
authors.lastname: Zhou
authors.forename: Bingru
authors.initials: B
authors.lastname: Zhang
authors.forename: Baozhen
authors.initials: B
authors.lastname: Wu
authors.forename: Jie
authors.initials: J
authors.lastname: Li
authors.forename: Junlian
authors.initials: J
authors.lastname: Qiao
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Guan
authors.forename: Fengting
authors.initials: F
authors.lastname: Li
mesh_terms: D001149:Arsenates / Q000737:chemistry* / Q000302:isolation & purification; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D006639:Histidine / Q000737:chemistry*; D007093:Imidazoles / Q000737:chemistry*; D016062:Porosity; D013501:Surface-Active Agents / Q000737:chemistry; D013696:Temperature; D014867:Water / Q000737:chemistry; D018508:Water Purification / Q000295:instrumentation*; D017641:Zeolites / Q000737:chemistry*
chemical_list: D001149:Arsenates; D002593:Cetrimonium Compounds; D007093:Imidazoles; D013501:Surface-Active Agents; D014867:Water; D017641:Zeolites; D006639:Histidine; C025657:arsenic acid; D000077286:Cetrimonium