A nanorod-like lanthanum
metal–organic
framework (LaMOF) was synthesized in aqueous solution by coordinating
La(III) to the ligand 1,3,5-benzenetricarboxylic acid. The fibrous
LaMOF was fabricated by splitting the nanorod-like LaMOF in a solution
of
d
-amino acid oxidase, and the enzyme was immobilized simultaneously.
Based on SEM and TEM images, STEM mapping, and spectra of XPS and
FTIR, the mechanism of formation of the fibrous LaMOF and the distinct
interfacial phenomena have been elucidated. The fabrication of the
fibrous LaMOF and simultaneous immobilization of the enzyme were carried
out in aqueous solutions at room temperature, without using any organic
solvent. It is a clean and time- and energy-effective process. This
work presents a distinct and clean methodology for the fabrication
of the fibrous MOF. Potentially, the environmentally benign methodology
can be extended to immobilize other enzymes.
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