1. International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Shaanxi 710049 China
2. Chemical Engineering and Technology School of Water and Environment Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region Ministry of Education Chang'an University Xi'an 710064 China
3. Department of Physics Tamkang University New Taipei City 25137 Taiwan
4. National Synchrotron Radiation Research Center Hsinchu 30076 Taiwan
5. Department of Chemistry Case Western Reserve University Cleveland OH 44106 USA