1Chongqing Key Laboratory of Catalysis and Functional Organic Molecules, College of Environmental and Biological Engineering, Chongqing Technology and Business University, Chongqing 400067, China 2Department of Nanoengineering, University of California, San Diego (UCSD), La Jolla, CA 92093, USA 3Department of Materials Science and Engineering, Chongqing University, Chongqing 400044, China 4School of Materials Science and Engineering, State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China