1. School of Materials and Chemical Engineering, Xi’an Technological University, Xi’an 710021, P. R. China
2. Gansu Provincial Research Center for Conservation of Dunhang Cultural Heritage, Dunhuang 736200, China
3. Department of Chemistry and Centre for Scientific Modeling and Computation, Chinese University of Hong Kong, Shatin, Hong Kong 999077, China
4. State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Lab of Graphene (NPU), Xi’an 710072, China
5. Shaanxi Provincial Institute of Archaeology, Xi’an 710054, China
6. Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518057, Guangdong, China