1. Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, P. R. China
2. College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
3. College of Advanced Interdisciplinary Studies & Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices, National University of Defense Technology, Changsha 410073, P. R. China
4. School of Pharmaceutical Sciences, Universiti Sains Malaysia, Penang 11800, Malaysia