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Title: Microwave assisted one-pot synthesis of core-shell gold nanoparticles for catalytic and building applications
Keywords: Building
Project and Facilities Management
Shah Kwok Wei
2020/2021 PFM
Gold Nanoparticles
Degree of B.Sc. (Project and Facilities Management)
Issue Date: 4-Jan-2021
Citation: TAN KAI JIE DANNY (2021-01-04). Microwave assisted one-pot synthesis of core-shell gold nanoparticles for catalytic and building applications. ScholarBank@NUS Repository.
Abstract: Gold nanoparticles (Au NPs) possess superior electric, catalytic, optical, physical, and chemical properties that attracted its use in a wide variety of applications. In particular, the building industry which uses Au NPs in air filter as catalyst for air purification, glass coatings to reduce infrared transmissions, and photovoltaic cells to enhance surface plasmon light scattering effect. Silica (SiO2) shell is a favourable coating for Au NPs as it is non-toxic, chemically inert in a diverse range of solvent ensuring good protection for the NPs and allows functionalisation with various chemical groups for different applications. The current synthesis method of silica coated gold (Au@SiO2) NPs is time consuming, tedious, hazardous, expensive, and of multi-pot synthesis. With the demands for Au@SiO2, it is necessary to create a synthesis method that is one-pot, rapid, facile, economical, and environmentally friendly. This paper presents an improved one-pot microwave (MW) irradiation method for synthesizing Au@SiO2 NPs using hydrolysed (3-Mercaptopropyl) Trimethoxysilane (MPTMS). From the initial experiments and literature reviews, the hydrolysed MPTMS possess the reducing and encapsulating capability in aqueous media without producing hazardous by-product. The synthesis is simple, without the need for pre-coating or use of any additional chemical to link the silica to the Au NPs surface. However, further research will need to be carried out to establish the actual feasibility of the proposed method. This environmentally friendly and rapid one-pot MW synthesis method has the potential to fabricate silica-coated metallic NPs in bulk that can be functionalised for various uses.
Appears in Collections:Bachelor's Theses

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