“…3 , the four diffraction peaks at 38.0°, 44.3°, 64.2°, and 77.2° are indexed to metallic Ag, corresponding to the (111), (200), (220), and (311) crystal plane reflections, respectively. 20 This result demonstrates that Ag + was reduced to well-crystallized metal Ag. In addition, the sharp diffraction peaks at 25.3°, 38.0°, 48.1°, 53.8°, 54.8°, and 62.8° are indexed to anatase TiO 2 , corresponding to the (101), (004), (200), (105), (211), and (213) crystal plane reflections, respectively.…”