1. College of Materials and Chemical Engineering, Engineering Research Center of Eco-Environment in Three Gorges Reservoir Region, Ministry of Education, Material Analysis and Testing Center, China Three Gorges University, No.8 Daxue Road, Yichang, Hubei 443002, China
2. SM, UMR CNRS 5255, Université de Bordeaux, 351 Cours de la Libération, Talence Cedex 33405, France