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RISS 인기검색어
- 검색키워드
- 저자 : BUI KHAC HOANG VU (검색결과 2 건)
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Preparation of aminoclay-polymer nanocomposite hydrogels
BUI KHAC HOANG VU Gachon University 2017 국내석사
Aminoclay has been revealed to have potential in many applications. In this research, we used freezing-thawing method for 3 consecutive cycles to prepare poly(vinyl alcohol) (PVA) hydrogels composite with magnesium organophyllosilicate (MgAC) and zinc organophyllosilicate (ZnAC-[Cl2]). These hydrogels were tested by gel fraction, swelling ratio and SEM observation. In general, the presence of aminoclay materials reduced the gel fraction but increased the swelling ratio and porous size of hydrogels. The radial diffusion method was applied for antimicrobial test. Staphylococcus aureus and Escherichia coli were chosen as harmful bacteria. The ZnAC-[Cl2]/PVA hydrogels have stronger antimicrobial activity compared to MgAC/PVA hydrogels. We also prepared MgAC/PVA hydrogels with silver nanowire (AgNW) at different concentration. From initial experiments, silver nanowire enhanced antimicrobial activity but did not affect gel fraction and swelling ratio ability
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Synthesis of aminoclay based nanocomposite materials for water/waste treatment
BUI KHAC HOANG VU Graduate School Gachon University 2020 국내박사
2-D nanomaterials were widely utilized to developed photocatalytic nanocomposite materials. In the previous study, magnesium aminoclay (MgAC), which was also one type of 2-D material, has been shown its potential for environmental treatment due to its high adsorption ability. In this thesis, we tried to develop nanocomposite/hybrid nanocomposites based on aminoclay including MgAC-TiO2, MgAC-Fe3O4, and MgAC-Fe3O4/TiO2. Different techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray fluorescence spectrometry (XRF), Brunauer-Emmett-Teller (BET), photoluminescence (PL), and UV photoelectron spectroscopy (UPS) were used to characterize the nanocomposites. All of the mentioned nanocomposites/hybrid nanocomposites have high photocatalytic/photo-Fenton abilities compared to commercial products. The high photocatalytic/photo-Fenton of these materials could be attributed to the synergistic effects gained from the high adsorption ability of MgAC and photocatalytic/photo-Fenton activity of Fe3O4/TiO2 nanomaterials. However, this study remained some limitations. The structure and photocatalytic/photo-Fenton mechanism of nanocomposites/hybrid nanocomposites are not clear enough and should be confirmed in the future. Due to their potentials, these materials could be extended to biological applications such as microalgae harvesting or sensor.
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