1. Institute for Ecological Research and Pollution Control of Plateau LakesSchool of Ecology and Environmental ScienceSchool of Chemical Science and TechnologyYunnan University Kunming 650504 China
2. Key Laboratory of Chemistry of Plant Resources in Arid RegionsState Key Laboratory Basis of Xinjiang Indigenous Medicinal Plants Resource UtilizationXinjiang Technical Institute of Physics and ChemistryChinese Academy of Science Urumqi 830011 China
3. College of Chemistry and Molecular EngineeringZhengzhou University Zhengzhou 450000 China
4. State Key Laboratory of Chem/Bio-Sensing and Chemometrics,Provincial Hunan Key Laboratory for Graphene Materials and DevicesCollege of Chemistry and Chemical EngineeringHunan University Changsha 410082 China