Assoc. Prof. Pan Hui
Department of Physics and Chemistry, Faculty of Science and Technology, University of Macau, China
Dr. Hui Pan is an associate professor in the Institute of Applied Physics and Materials Engineering, and the founding head of Department of Physics and Chemistry in the Faculty of Science and Technology at the University of Macau. He got his PhD degree in Physics from the National University of Singapore in 2006. From 2006 to 2013, he worked at National University of Singapore as a Research Fellow, Oak Ridge National Laboratory (USA) as a Postdoctoral Fellow, and Institute of High Performance Computing (Singapore) as a Senior Scientist, respectively. He joined the University of Macau as an assistant professor in 2013. In his research, a combined computational and experimental method is used to design and fabricate novel nanomaterials for applications in energy conversion and storage (such as electrocatalysis, photocatalysis, supercapacitors, hydrogen storage, and fuel cells), electronic devices, spintronics, and quantum devices. He has published more than 150 papers in international peer-reviewed journals, such as Phys. Rev. Lett., Phys. Rev. B, and Chem. Mater. The total citation is more than 7300 (google scholar). Additionally, he is the author of 5 book chapters and the inventor of 4 USA and 4 China patents. His present h-index is 42 (google scholar).
Title: Design and Fabrication of Nanomaterials for Energy Harvesting
Abstarct: Hydrogen (abundant, clean and renewable) has been considered as one of the most important green energy sources to cater the increasing demand for energy in the future due to the limited supply of the old forms of depletable energy (coal, oil, nuclear) and their detrimental effects on the global climate. Water splitting has attracted increasing attention due to the versatile applications of hydrogen and oxygen gases. Generally, there are two ways for the water splitting, including solar-driven hydrogen production and electrical-driven electrolysis of water. In this talk, I will present our recent work on the hydrogen production using the two methods based on materials’ design and experiment fabrication, including including: (1) Design of electrocatalysts for electrical-driven hydrogen production. (2) Fabrication of nanomaterials for eletrocatalysis based on our design. (3) Design of photocatalysts for solar-driven production, where we used our designed electrocatalyts as co-catalysts in the photocatalysis. The approach enables the enhanced carrier mobility and electron-hole separation, and improved photocatalytic activity in the visible light region and thus offers immense potential for application in solar energy conversion, water splitting, and a variety of solar-assisted photocatalysis.
Assoc. Prof. Hazem Samih mohamed
School of Civil Engineering and Geomatics, Southwest Petroleum University, China
Hazem Samih Mohamed, Male, Born in 1987, Egyptian, Associate Professor. Obtained my Bachelor’s Degree in 2009 from Benha University, Cairo, Egypt. And obtained my master’s degree and Ph.D. degree in Structural Engineering from Huazhong University of Science and Technology, Wuhan, China in 2013,2017 respectively. Since 2017.11, I've been an Associate Professor in the School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu, China. I've Published over 10 technical papers including 5 in a peer-reviewed high-quality international SCI indexed international journal such as Journal of Construction Steel Research (JCSR), KSCE journal of civil engineering (KSCE), International Journal of steel structure (SSIJ). Part C: Journal of Mechanical Engineering Science. As well as supervised 4 Master’s students. My research interest in Steel structures, Fatigue assessment, Tubular joints, CFRB and Pre-stressing of steel beams. My recent research work focuses on the fatigue assessment of steel Circular Hollow Sections (CHS) tubular joints, which used extensively in offshore structures due to their excellent structural and mechanical properties such as high strength versus weight ratio, high buoyancy, low drag coefficient and small corrosion surface area. I pursued specialized doctoral studies on the Fatigue performance of heat-treated tubular joints. And I’ve also developed a flexible and robotic FEM mesh generator which is suitable for generating good quality mesh, using MATLAB programming language and ABAQUS software, of tubular joints with inclined surface cracks at any arbitrary locations along the weld toe.
Title: Fatigue Performance of Hollow Tubular Space-Structures after Heat Treatment
Abstarct: A considerable number of tubular structures were built around the world in the last century such as exhibition halls, bridges, stadiums, industrial plants, railway stations and airports. The safety of these structures is mainly threatened by the risk of fatigue damage, which is one of the most common reasons for the loss of structural integrity, about 25% of all repair works, as revealed by the Health and Safety Executive Annual Statistics for North Sea steel structures. Statistically, in welded tubular structures a certain number of weld defects causes stress concentrations along the weld toe in addition to the welding procedure introduces residual stresses into the weld and surrounding structure leads to reduce its service life. Therefore, one of the significant challenges confronting the researchers is extending and enhancing the service life of those structures. AWS (2010) proposed some methods which could be used to prolong the fatigue life of tubular structures by using the fatigue life enhancement techniques, such as as-weld profile improvement and weld toe grinding as well as heat treatment of the weld vicinity. Thus, the focus in this presentation on the heat treatment of the joint weld vicinity as a fatigue enhancement technique and presenting an experimental investigation. An experimental study on the fatigue performance of heat-treated Circular Hollow Section (CHS) T-joints subjected to constant amplitude cyclic actions were conducted. The stress distribution measurement along the weld toe of was first collected under static load within the elastic range. Then the tested specimens were exposed to fatigue cyclic loading until forming a through thickness crack. The crack initiation and propagation of the specimens were observed. The fatigue life results obtained from the experiment were compared with those from CIDECT and API guidelines. The result showed that the using of heat treatment as enhancement technique could prolong the fatigue life tubular T-joint by 300%.