1. College of Materials Science and Engineering Guilin University of Technology 541004 Guilin P. R. China
2. Key Laboratory of New Technology for Processing Nonferrous Metals and Materials,Ministry of Education Guilin University of Technology 541004 Guilin P. R. China
3. Guangxi Beibu Gulf Engineering Research Center for Green Marine Materials 541004 Guilin P. R. China
4. College of Chemistry and Bioengineering Guilin University of Technology 541004 Guilin P. R. China