Figure 5
From: Photo-reduced Cu/CuO nanoclusters on TiO2 nanotube arrays as highly efficient and reusable catalyst
Time-dependent UV-vis absorption spectra for the reduction of 4-NP with (a) C-0.02; (b) C-0.1; (c) C-0.5; and (d) the corresponding plots of ln (Ct/C0) versus reaction time.
