In the recent issue of ACS Sustainable Chemistry & Engineering published in July 1, 2013, a research article written by Professor Chongzheng Na and two postdoctoral fellows, Drs. Haitao Wang and Zhuxin Dong, is featured in the cover (cover image; upper right, created by Xia Zhao). This article, entitled “Hierarchical Carbon Nanotube Membrane-Supported Gold Nanoparticles for Rapid Catalytic Reduction of p-Nitrophenol”, describes a new design of nano catalyst that can promote mixing with contaminated water while minimizing pressure loss in flow-through reactors (article pdf). This work was supported by Notre Dame Sustainable Energy Initiative, DOE Office of Energy’s Nuclear Energy University Program, NSF’s Environmental Engineering Program, and American Chemical Society Petroleum Research Fund.