1. School of Chemical Engineering Northwest University Shaanxi Xi'an 710069 China
2. Department of Chemistry and Centre for Plastic Electronics Imperial College London Exhibition Road London SW7 2AZ UK
3. Chemical Engineering Research Center of the Ministry of Education for Advanced Use Technology of Shanbei Energy Shaanxi Research Center of Engineering Technology for Clean Coal Conversion Northwest University Xi'an 710069 China
4. College of food science and technology Northwest University Shaanxi Xi'an 710069 China
5. School of Materials Science and Engineering Shaanxi University of Science and Technology Xi'an 710021 China