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정소은,( Tran Minh Ngoc ),유효종 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Morphologically unique silica nanoparticles can be used as effective templates to prepare hybrid materials, which are highly applicable in a variety of areas. Herein, dendritic fibrous nanosilica (DFNS) with low density, high stability and permanent porosity is successfully employed as a template to grow gold nanoparticles and/or zinc-based coordination polymer particles to fabricate DFNS-based hybrid nanomaterials. Au nanodots are initially anchored on the surface of the DFNS through the selective reduction of Au ions to form DFNS/Au dots. The DFNS is subsequently employed as an efficient template to grow Zn-CPPs via solvothermal process, and this leads to the formation of DFNS@Zn-CPPs core-shell nanohybrids. For next step, the DFNSbased derived materials, i.e., DFNS@ZnO and DFNS/Au dots@TiO<sub>2</sub> are also fabricated. The obtained hybrid nanomaterials exhibit an enhancement of catalytic acyivity.
정소은,( Maiduyhien ),유효종 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Multicompositional nanomaterials possessing unique morphologies and multiple functions can be prepared by the rational integration of two or more well-designed components. Herein, gold multipod nanoparticle core- cobalt-based zeolitic imidazolate framework shell (GMN @ZIF-67) nanohybrids are successfully synthesized in an effective and controllable manner. The size and shape of the GMN@ZIF-67 nanohybrids can be controlled by either varying the molar ratio of ZIF-67 precursors or the quantity of GMNs used.
Facile Synthesis and Catalytic Activity of Dendritic Fibrous Nanosilica (DFNS)/Gold (Au) Nanohybrids
정소은,( Tranminhngoc ),유효종 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Dendritic fibrous nanosilica (DFNS) with a high surface area, stability, and ease of surface modification is successfully employed as a template to fabricate DFNS/Au nanohybrids. Au nanodots are initially synthesized by the selective reduction of Au ion by NaBH<sub>4</sub> on the surface of the DFNS after surface modification to form DFNS/Au dots. A seed-mediated growth method is used to controllably grow Au nanoparticles on the DFNS/Au dots to generateDFNS core-Au NPs shell nanoparticles (DFNS/Au NPs) and DFNS core-Au layer shell nanoparticles (DFNS/Au layers). The catalytic activities of DFNS/Au NPs and DFNS/Au layers in the 4-nitrophenol reduction reaction are compared.
정소은,유효종 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
The assembly of nanoparticle within hollow nanoshells provides access into advanced nanohybrids with unique and colligative properties. In this work, an effective solution-based synthetic approach for peapod-shaped Au nanoparticle assembly encapsulated within hollow silica nanotubes (pp multi Au@SiO<sub>2</sub> NTs) is reported. Firstly, onedimensional [multiple Au nanodot] core-[silica] shell nanowires (multi-Au@SiO<sub>2</sub> NWs) are synthesized using reverse microemulsion techniques. A subsequent thermal treatment of multi-Au@SiO<sub>2</sub> NWs in aqueous polyvinylpyrrolidone (PVP) solution results in the formation of pp multi-Au@SiO<sub>2</sub> NTs. Further overgrowth of secondary materials (i.e., Pt) on the Au nanoparticles in pp multi-Au@SiO<sub>2</sub> NTs results in the generation of [Au] core-[Pt] shell (Au/Pt) nanoparticle assemblies surrounded by silica nanotubes (pp multi-Au/Pt@SiO<sub><sub>2</sub></sub> NTs). The resulted nanoparticles can be efficient and selective nanoreactors for targeted applications.
정소은,( Tranminhngoc ),유효종 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Dendritic fibrous nanosilica (DFNS) with a high degree of porosity, stability, and ease of surface modification is successfully employed as an efficient template to fabricate DFNS/Au hybrid nanomaterials. Au nanodots are initially synthesized by the selective reduction of Au ion by NaBH4 on the surface of the DFNS after surface modification to form DFNS/Au dots. A seed-mediated growth method is used to controllably grow Au nanoparticles on the DFNS/Au dots to generate DFNS core-Au NPs shell nanoparticles (DFNS/Au NPs) and DFNS core-Au layer shell nanoparticles (DFNS/Au layers). The catalytic activities of DFNS/Au NPs and DFNS/Au layers in the 4-nitrophenol reduction reaction are also compared.
정소은,( Tran Minh Ngoc ),유효종 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1
The establishment of versatile and efficient strategies for the preparation of multicomponent nanohybrids with distinct funtions are at the forefront of nano-engineering. Herein, silica multi-branched nanoparticles (SMNs) with excellent hydrothermal and mechanical stabilities and a high degree of porosity are prepared. For the controllable growth of secondary materials, the introduction of functional amino groups (-NH<sub>2</sub>) on the as-prepared SMNs using APTES is important. The NH<sub>2</sub>-functionalized SMNs are subsequently employed as seeds to grow [N3]Zn-CPPs via solvothermal process, and this leads to the formation of SMN@[N3]Zn-CPPs core-shell nanohybrids. The monodisperse SMN@[N3]Zn-CPPs are characterized using SEM, TEM, EDX, FTIR, powder XRD, and nitrogen sorption measurement at 77 K. In addition, the as-synthesized SMN@[N3]Zn-CPPs can act as sacrificial templates for the preparation of different inorganic hybrid nanomaterials via thermally-induced approaches.