1. Department of Environmental Engineering, National Cheng Kung University, Tainan City 701, Taiwan, Sustainable Environment Research Center, National Cheng Kung University, Tainan City 701, Taiwan, Department of Chemistry and Biochemistry, National Chung Cheng University, Ming-Hsiung, Chia-Yi, 621, Taiwan, Department of Chemistry, National Cheng Kung University, Tainan City 701, Taiwan, and National Synchrotron Radiation Research Center, Hsinchu, Taiwan