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Modification of halloysite nanotubes for enhancement of gas adsorption capacity

Title
Modification of halloysite nanotubes for enhancement of gas adsorption capacity
Other Titles
기체 흡착 능력 향상을 위한 할로이사이트 나노튜브의 변형
Author
Sungho Lim
Alternative Author(s)
임성호
Advisor(s)
손대원
Issue Date
2019-02
Publisher
한양대학교
Degree
Master
Abstract
Gas adsorption capacity of surface modified halloysite nanotubes were measured. Natural halloysite nanotubes were modified by sulfuric acid in different concentration to selectively remove alumina composition of the tubes. X-ray diffraction and energy dispersive X-ray spectroscopy were used for verifying the compositional change of the inorganic tubes. The surface modification increased inner space volume of the tubes and decreased the mass of nanotubes because of alumina elimination. Transmission electron microscopy shows the internal structure and morphology of natural halloysites and modified halloysites. The transformations of the structure caused by sulfuric acid increase specific surface area, pore volumes, and gas adsorption capacity of reacted halloysite nanotubes. The gas adsorption capacity of natural halloysite nanotubes and modified ones was quantitatively analyzed by BET measurement. BJH plot and thickness plot were utilized for comparing the porosities after dealumination. The numerical data of gas adsorption shows the modification of halloysite nanotubes is immensely effective to increase gas adsorption efficiency of the materials. Halloysite nanotubes were separated by centrifugation to study property differences between each group in further research. The morphology and porosity characteristics were analyzed by BET measurement and TEM images.
URI
https://repository.hanyang.ac.kr/handle/20.500.11754/99861http://hanyang.dcollection.net/common/orgView/200000434621
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > THEATER & FILM(연극영화학과) > Theses (Master)
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