[Li, Jie; Liu, Qiong; Liu, Yang; Li, Wenzhang; Liu, Wenhua; He, Haizhou] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China.
[Yang, Yahui] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
[Meng, Dedong] Jilin Univ, Coll Chem, Changchun 130012, Jilin, Peoples R China.
[Li, Yaomin] UCL, Dept Chem, London WC1H 0AJ, England.