Journal
ENZYME AND MICROBIAL TECHNOLOGY
Volume 103, Issue -, Pages 42-52Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.enzmictec.2017.04.008
Keywords
Fibrous/nonfibrous; Mesoporous; Yolk Shell; Fe3O4; Immobilized lipase
Categories
Funding
- State Key Program of National Natural Science of China [51433008]
- Natural Science Foundation of Shaanxi Province [2015JQ2055]
- Basic Research Fund of Northwestern Polytechnical University [3102014JCQ01094, 3102014ZD]
Ask authors/readers for more resources
The mesoporous yolk-shell nanoparticles (MYSNs), with a movable Fe3O4 core inside the hollow capsules, with two different morphologies (1) Fe3O4@SiO2@hollow@fibrous SiO2 (Yolk Shell-1) (2) Fe3O4@SiO2@hollow@ mesoporousSiO(2) (Yolk Shell-2) were fabricated as carriers for Candida rugosa lipase (CRL) immobilization, through a template-assistant selectively etching method. Firstly the hydrophilic Fe3O4 nanoparticles were synthesized according to the solvothermal method. Then, SiO2 shell was coated on the Fe3O4 nanoparticle surface by a sol-gel reaction. Subsequently, the resorcinol farmaldehyde (RF) shell was covered on the surface of as-prepared Fe3O4@SiO2 composites and sandwiched Fe3O4@SiO2@@RF composites were formed, which were finally provided with mesoporous fibrous (KCC) in the Yolk Shell-1 and mesoporouS Silica in the Yolk Shell2(Non fibrous). After selectively etching CTAB and the middle RF layer, the two kinds of yolk/shells composites were obtained. By utilization of their large and open mesopores (20-50 nm) with good surface area (457.78-625.54 m(2)/g,) CRL was immobilized after amino functionalization using glutaraldehyde as a linker. The ICRL on Y.S-1, Y.S-2 showed good loading (797-501 mg/g) and enzyme activity of (1503-837 U/g) respectively. Thermal stability, resistance to pH, recycling and storage capacity were improved as compare to free lipase.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available