This study explores the synthesis and application of Ni-based photocatalysts supported on MCM-41 and Al-MCM-41 for phenol degradation. Three preparation methods were evaluated and compared: Chemical Vapor Deposition (CVD), Incipient Wet Impregnation (IWI), and Template Ion Exchange (TIE). The influence of the Si/Al ratio of 5 and 60 on phenol photodegradation was also examined. The results showed that the Ni/MCM-41 photocatalyst prepared by CVD achieved the highest degradation efficiency (97.28%), while the TIE method proved to be the most versatile overall. Notably, the TIE method was the only synthesis method capable of exhibiting photocatalytic activity in phenol degradation on all suppor... More >