RPG Student List

 

Shaqi GE

Doctor Candidate in Chemical and Biomolecular Engineering (Energy Technology Concentration)

Supervisor: Prof. Ka Ming NG

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Research Topic

Synthesis, characterization and functionalization of various copper chalcogenide nanoparticles for the application of solar control glazing

Abstract

Solar irradiation is divided into mainly three parts based on the wavelength. The visible light (380 – 780 nm) provides natural lighting to the buildings and vehicles interior. The ultra violet (UV) light (100 – 380 nm) damages the furniture and the skin, and the near-infrared (NIR) light (780 – 2500 nm) brings heat to the interior which increases the air-conditioning demand in the hot weather. A window that can regulate the solar irradiation is essential to energy saving while maintaining human comfort.
In this thesis, the structure of nanoparticles (NPs) integrated polyvinyl butyral (PVB) composite film is studied, with main focus on the nanoparticles.
In Chapter 2, various traditional and novel materials are investigated based on designed criteria for the application of solar control film. Their sizes and the ability to disperse in solvents are considered. Single and multiple nanoparticles are integrated into PVB matrix and the optical performance are studied, among which copper chalcogenide nanoparticles are used in this application for the first time. In the following chapters, selected novel materials and studied for this particular application.
In chapter 3, copper sulfide nanoparticles are synthesized via a modified one-pot wet chemistry method. The effects of the synthesizing temperature on the crystal structures and metal doping on the localized surface plasmon resonance (LSPR) maximum are studied. In chapter 4, copper selenide and copper telluride nanoparticles are synthesized and also doped with metals. The synthesizing method is modified from the one for copper sulfide since the different chemical properties of selenium and tellurium from those of sulfur. The shifts of LSPR maximum due to different crystal structures, particle shaper, and metal doping are also examined. In chapter 5, tungsten oxide nanoparticles is synthesized via a similar method with different solvents and reactants. Dopants such as cerium and indium are studied in terms of the effect on the crystal structure, the particle size, and the location of the LSPR maximum.

Journal Publication


Ge, Shaqi; Wong, Ka Wai; Ng, Ka Ming, "Revitalizing Digenite Cu1.8S Nanoparticles with the Localized Surface Plasmon Resonance (LSPR) Effect by Manganese Incorporation", (2017)