Assoc. Prof. Ts. Ir. Dr. Pung Swee Yong
Associate Professor
School of Materials and Mineral Resources Engineering,
Engineering Campus, Universiti Sains Malaysia
Penang, Malaysia
Keynote Session 4: Immobilization of Zinc Oxide-based Nanomaterials on Supporting Substrates for Photocatalyst Applications
Dr. Pung Swee Yong received his B. Eng in Materials Engineering (first class honor) from Universiti Sains Malaysia in 1998. He joined S.E.H. (M) Sdn. Bhd., a world class silicon wafer manufacturer; as R&D/Materials Characterization engineer. As a part time master degree student, he completed M.Tech (Materials Science) from University of Malaya in 2002. To remain in R&D, he worked for InventQjaya (M) Sdn. Bhd. as the technical head for the development of smart (switchable) windows using polymer-stabilized cholesteric textures technique. In 2006, he received a scholarship from USM under Academic Staff Training Scheme (ASTS) to pursue his PhD study in University of Nottingham, United Kingdom. In 2010 he was awarded with a doctorate degree based on his work on synthesis and characterization of ZnO nanowires. He is currently an academic staff of School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia.
Dr Pung provides testing and consultancy services. In fact, he involved in setting up the Materials Testing Laboratory (MTL) (ISO 17025 accredited laboratory) of School of Materials and Mineral Resources Engineering, Universiti Sains Malaysia. He is head of MTL since 2018. He also actives in R&D activities. His technical relevance, innovation and significance of this research is recognized by the scientific communities. This is reflected by receiving research funding, both international and local; over 80 publications in indexed journals; numerous invitations to international conferences and symposiums; and 4 national innovation awards. He is also one of the editors of Malaysian Journal of Microscopy (2021/2022).
Keynote Speech Abstract
ZnO-based nanomaterials have been demonstrated its potential for photocatalyst applications such as degradation of organic pollutants, removal of heavy metal ions, inactivation of bacterial and fungal, and generation of hydrogen via water splitting. Nevertheless, the use of ZnO based nanomaterials in particle form is not encouraging in industry application. The ZnO particles tend to wash away by wastewater, causing deterioration of photocatalytic performance over time. In addition, extra steps are needed to recover these ZnO particles from the treated water, incurring extra time and operational cost. Many attempts have been done by researchers to address this issue. These includes synthesizing magnetized ZnO particles and immobilization of ZnO particles on supporting substrates. In this talk, a review will be given on the immobilization of ZnO-based nanomaterials on various supporting substrates. In general, the supporting substrates could be categorized as (i) rigid substrates such as glass, silicon and stainless steel, and (ii) polymeric substrates such as polyurethane, polyethylene terephthalate and polyethylene. The selection of supporting substrates is crucial as it will constrain the use of synthesis technique for the growth of ZnO-based nanomaterials, and the handling of these photocatalysts in the later stage. The strengths and weaknesses of using rigid substrates versus polymeric substrates will be discussed. Lastly, the future development of the immobilized ZnO-based photocatalysts will be presented.
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