1. Department of Biomass and Chemical Engineering; Sichuan University; Chengdu 610065 PR China
2. National Engineering Laboratory for Clean Technology of Leather Manufacture; Sichuan University; Chengdu 610065 PR China
3. School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue 639798 Singapore
4. Institute of Solid State Physics; Chinese Academy of Sciences; 350 Shushanghu Road Hefei 230031 Anhui PR China
5. CREATE; #10-02 1 CREATE Tower 138602 Singapore
6. Department of Materials Science & Engineering; National University of Singapore; 7 Engineering Drive 1 117574 Singapore
7. Department of Mechanical Engineering & Materials Science; Rice University; Houston Texas 77005 USA
8. Energy Research Institute @ Nanyang Technological University; Nanyang Technological University; 50 Nanyang Avenue 639798 Singapore