1. Department of Chemistry and Biochemistry, The University of Texas at El Paso, El Paso, Texas, USA;
2. Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment, The University of Texas at El Paso, El Paso, Texas, USA;
3. Environmental Sciences and Engineering Ph.D. Program, The University of Texas at El Paso, El Paso, Texas, USA;
4. Department of Chemistry, The University of Texas Rio Grande Valley, Brownsville, Texas, USA