AMORNSAKCHAI, Taweechai, Department of Chemistry, Faculty of Science, Mahidol University, Phutthamonthon sai 4, Salaya, Nakhon Pathom 73170, Thailand; Center of Sustainable Energy and Green Materials, Faculty of Science, Mahidol University, Phutthamonthon sai 4, Salaya, Nakhon Pathom 73170, Thailand, Thailand