Membrane adsorber withhierarchically porous
HKUST-1 immobilized in membrane pores by flowing synthesis
Ke Bai, Senqing
Fan*,
Yu Chen, Yilin Wang, Jiaojiao Chen, Zenghui Mai, Jingyun Liu, Lei Deng,
Zeyi Xiao
School of Chemical Engineering,
Sichuan University, 610065, Chengdu, China
*Email: fansenqing86@scu.edu.cn, Tel/Fax number: 86-028-85405220
Abstract: A membrane adsorber with hierarchically porous
HKUST-1 (HP-HKUST-1) immobilized in membrane pores has been fabricated
by flowing synthesis. The XRD characteristics indicated that the
structure integrity of the HP-HKUST-1 immobilized in the membrane pores
can be kept after template agent removed. Other characteristics
presented by XPS, FTIR, SEM, TEM and BET proved the effective
immobilization of HP-HKUST-1 in membrane pores. Compared with
hydrothermal HKUST-1 powder, the adsorption capacity for Congo red and
Methylene blue adsorption can be increased several times by hydrothermal
HP-HKUST-1 powder, owing to the mesopores with rich active sites for
adsorption. When the solution was flowed through the membrane adsorber,
the adsorption rate for these adsorbates increased significantly, owing
to the enhanced mass transfer in the confined space of the membrane
pores with micro or nano scale. After going through seven
adsorption-desorption experiments, the membrane adsorber with HP-HKUST-1
immobilized in membrane pores shows a remarkable repeatability.
Key words: metal-organic frameworks; membrane adsorber; flowing
synthesis; hierarchically porous structure