1. Department of Environmental Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, P. R. China
2. School of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, P. R. China
3. Department of Chemistry, College of Science, Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia
4. National Engineering Laboratory for VOCs Pollution Control Material & Technology, University of Chinese Academy of Sciences, Beijing 101408, P. R. China