1. School of Chemical Engineering and Light Industry Guangdong University of Technology Guangzhou 510006 P. R. China
2. College of Chemistry and Environmental Engineering Guangdong Engineering and Technology Research Center for Advanced Nanomaterials Dongguan University of Technology Dongguan 523808 P. R. China
3. Chemistry and Chemical Engineering of Guangdong Laboratory Shantou 515063 P. R. China