1. Department of Environmental Engineering and Science, Feng Chia University, Taichung 407, Taiwan
2. Nanomaterials & Solar Energy Conversion Lab, Department of Chemistry, National Institute of Technology, Trichy 620015, India
3. Institute for Polymer, Composites and Biomaterials (IPCB), Italian National Research Council (CNR), P.le Enrico Fermi 1, Portici, 80055 Naples, Italy