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Talk: Development of "green" particulate systems for bio- and environmental applications

Speaker: Hsin-Yun Hsu, National Chiao Tung University, Taiwan (Host: Tobias Weidner)

2019.09.04 | Marianne Sommer

Date Thu 05 Sep
Time 10:15 11:00
Location Room 1510-410, Department of Chemistry, Langelandsgade 140, 8000 Aarhus C

Abstract:

Development of “green” particulate systems for bio- and environmental applications

Hsin-Yun Hsu

Department of Applied Chemistry and Institute of Molecular Science,
National Chiao-Tung University, No.1001, University Rd., Hsinchu, Taiwan

Center for Emergent Functional Matter Science,
National Chiao Tung University, No.1001, University Rd., Hsinchu, Taiwan

Email: hyhsu99@nctu.edu.tw

The rapid development in micro/nanomaterials has brought great opportunities to versatile applications.

A controlled texture or the chemical functionalization is usually coupled with adaptive properties, such as pH-, redox-, light-, and magnetic field triggered responses. However, most synthetic processes required organic solvents and toxic chemical reagents in harsh conditions. Additionally, few studies aimed to work on the controllable degradability of the materials. In the past few years, we have developed several silica and carbon-based platforms to modify their intrinsic physical/chemical properties for diverse purposes.

The synthesis of biodegradable silica nanomaterials has been one of important research focuses. In  conventional sol-gel approach, the use of acidic or basic catalyst was always necessary. Solvent, heating and templates were often applied. Besides, multi-step synthetic procedures were also frequently required to obtain desired silane for multiple functionalities. To overcome these abovementioned bottlenecks, we have employed the photochemical reactions to fabricate redox-responsive silica nanocarriers. The disulfide bond in the silica nanoparticles eventually also can be cleaved by reducing reagents, facilitating the self-disassembly for rapid removal. In respect of investigations in covalent organic polymer, we have fabricated polyphenol-derived, polymeric microsphere-based adsorbent to enable the facile adsorption and the concurrent in situ SERS detection of the water pollutants, facilitating the contaminant removal and multiple analytes identification.

The polyphenols is available from natural tea leaves, with the advantages of nature source and low toxicity.

Current success exhibited the potential and new direction to future “green” material developments.

Department of Chemistry, Public / media, Staff