“…In the subsequent sections, we will highlight the main strategies for preparing these nanomaterials. These include chemical and thermal reduction, [76][77][78] sputtering, [79] ion-exchange, [80] deposition-precipitation (DP), [81] and photodeposition. [82] These strategies have been employed to generated TiO 2 NPs decorated with Au, [83][84][85][86] Ag, [87][88][89] Pd, [90,91] Ni, [92] Cu, [93][94][95] Ru, [96] and Al [97,98] NPs, for example.…”