1. School of Chemistry and Chemical Engineering, State Key Lab of Pulp and Paper Engineering, South China University of Technology, No. 381 Wushan Road, Guangzhou 510640, P. R. China
2. Department of Chemical Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 47L, Canada
3. School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, P. R. China