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RISS 인기검색어
- 검색키워드
- 저자 : Sidek Haslinda Binti Mohd (검색결과 3 건)
- 무료
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Mohd Sidek, Haslinda Binti,Jo, Yun Kyung,Kim, Tae Woo,Hwang, Young Kyu,Chang, Jong-San,Hwang, Seong-Ju American Chemical Society 2017 The Journal of Physical Chemistry Part C Vol.121 No.28
<P>Efficient water adsorbents with improved hydrostability can be synthesized by the hybridization of metal-organic framework (MOF) compounds with exfoliated layered double hydroxide (LDH) 2D nanosheets. The self-assembly between copper benzene tricarboxylate (Cu-BTC) MOF nanocrystals and exfoliated Mg-Al-LDH nanosheets leads to the nanoscale mixing of the MOF and LDH components, as well as to the prevention of the formation of aggregated secondary MOF particles. In the resulting nanohybrids, spherical Cu-BTC nanocrystals with small particle sizes of similar to 5-10 nm are uniformly anchored on the surface of Mg-Al-LDH 2D nanosheets with the dimensions of several hundred nanometers. At the optimal composition, the surface area of the resulting nanohybrid becomes greater than that of pristine Cu-BTC, which is attributable to the suppression of the self-aggregation of MOF nanocrystals and to the formation of the mesoporous stacking structure of the LDH nanosheets. Of prime importance is that both the water adsorption ability and the hydrostability of Cu-BTC become notably improved upon hybridization with LDH nanosheets. The present study clearly demonstrates that exfoliated LDH nanosheets can be used as an effective hybridization matrix for exploring novel efficient MOF-based hybrid water adsorbents.</P>
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Mohd Sidek, Haslinda Binti,Jo, Yun Kyung,Kim, In Young,Hwang, Seong-Ju American Chemical Society 2016 JOURNAL OF PHYSICAL CHEMISTRY C - Vol.120 No.41
<P>A novel methodology to explore efficient CO2 adsorbent is developed by the stabilization of layered double oxide (LDO) in the hybrid matrix of reduced graphene oxide (rG-O) and layered titanate nanosheets. The electrostatically derived self-assembly between cationic Mg-Al-layered double hydroxide (LDH) nanosheet and anionic graphene oxide (G-O)/layered titanate nanosheets followed by heat treatment at high temperature leads to the cohybridization of LDO (MgO/MgAl2O4) nanocrystals with exfoliated rG-O and layered titanate nanosheets. The incorporation of LDO into the hybrid matrix of rG-O and layered titanate nanosheets is highly effective in increasing its surface area through the formation of mesoporous stacking structure. Of prime importance is that even at very low concentration of titanate (0.3 wt %), an addition of layered titanate nanosheet induces a remarkable surface area expansion of LDO-rG-O nanocomposite from 178 to 330 m(2) g(-1). This result is attributable to the depression of the self-aggregation of rG-O nanosheets due to the incorporation of layered titanate nanosheet. The resulting LDO-rG-O-layered titanate nanocomposite shows promising CO2 adsorption capability of 1.71 mmol g(-1) at 273 K, which is much greater than those of LDO (0.79 mmol g(-1)) and LDO-rG-O nanocomposites (1.19 mmol g(-1)), highlighting the remarkable advantage of titanate addition to improve the CO2 adsorptivity of LDO. The present study clearly proves that the restacked assembly of rG-O nanosheet and layered metal oxide one has potential applications as an efficient hybrid matrix for exploring high performance gas adsorbent.</P>
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Sidek Haslinda Binti Mohd,이지형,Jin Xiaoyan,황성주 대한화학회 2023 Bulletin of the Korean Chemical Society Vol.44 No.12
A surface modification route to high-performance oxygen evolution electrocatalysts was developed by immobilization of highly-oxidized SeO42− species on the surface of exfoliated MnO2 nanosheets. The enhanced stability of tetragonally-distorted MnO6 octahedron could be achieved by the weakening of axial Mn–O bond due to competition with highly covalent Se6+–O bonds. The selenate anchoring was found to be quite effective in improving the electrocatalyst functionality of MnO2 nanosheets for oxygen evolution reaction, which could be ascribed to the improvement of charge transfer kinetics and the enhancement of Mn3+ stability. This study emphasized that the fine-control of bonding nature via surface modification with selenate anchoring can offer useful means to explore efficient electrocatalysts.
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