1. Shaanxi Provincial Key Laboratory of Papermaking Technology and Specialty Paper Development, College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science and Technology, Xi’an 710021, Shaanxi, P. R. China
2. Department of Chemistry, Hong Kong Baptist University, Waterloo Road, Kowloon Tong, Hong Kong, P. R. China
3. Chemical and Paper Engineering, Western Michigan University, Kalamazoo, Michigan 49008-5200, United States
4. Northwest University, Xi’an 710069, Shaanxi, P. R. China