1. Vanadium and Titanium Resource Comprehensive Utilization Key Laboratory of Sichuan Province, Panzhihua, Sichuan 617000, P. R. China
2. College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, Zigong, Sichuan 643000, P. R. China
3. School of Chemistry, Monash University, Clayton, VIC 3800, Australia