His current research focuses on rational designing and engineering of advanced membranes mainly derived from inorganic-polymer composite materials (e.g., MOFs-, zeolite- and silica- filled mixed matrix membranes), two-dimensional materials (e.g., graphene) and asymmetric hollow fibers, which are applied for energy and environment based on molecular separations including CO2 removal/capture, organic compounds recovery and purification, and membrane-intensified processes. Dr. Liu had more than 40 journal papers with over 1000 citations and H-index 18 (Google Scholar), and 10 presentations in international conferences and 8 granted patents.