Tianjin University of Technology - Center for Electron Microscopy, Tianjin University of Technology - Center for Electron Microscopy, University of Science and Technology Beijing - Department of Environmental Enginnering, Tianjin University of Technology - Center for Electron Microscopy, Tianjin University of Technology - Center for Electron Microscopy, Chinese Academy of Sciences (CAS) - State Key Laboratory of Coal Conversion, Shenzhen University - College of Physics and Optoelectronic Engineering, Tianjin University of Technology - Center for Electron Microscopy, Tsinghua University - Innovation Center of Advanced Optoelectronic Chip, Xi'an University of Technology - School of Materials Science and Engineering, Lanzhou University of Technology - State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Tianjin University of Technology - Center for Electron Microscopy and Beijing University of Chemical Technology - State Key Laboratory of Chemical Resource Engineering