Abstract
The efficacy of LaNaTaO(3) perovskites decoration RuO(2) at diverse contents for the photocatalytic H(2) generation has been explored in this study. The photocatalytic performance of RuO(2) co-catalyst onto mesoporous LaNaTaO(3) was evaluated for H(2) under UV illumination. 3%RuO(2)/LaNaTaO(3) perovskite photocatalyst revealed the highest photocatalytic H(2) generation performance, indicating that RuO(2) nanoparticles could promote the photocatalytic efficiency of LaNaTaO(3) perovskite significantly. The H(2) evolution rate of 3%RuO(2)/LaNaTaO(3) perovskite is 11.6 and 1.3 times greater than that of bare LaNaTaO(3) perovskite employing either 10% CH(3)OH or pure H(2)O, respectively. Interestingly, the photonic efficiency of 3%RuO(2)/LaNaTaO(3) perovskite was enhanced 10 times than LaNaTaO(3) perovskite in the presence of aqueous CH(3)OH solutions as a hole sacrificial agent. The high separation of charge carriers is interpreted by the efficient hole capture using CH(3)OH, hence leading to greater H(2) generation over RuO(2)/LaNaTaO(3) perovskites. This is attributed to an adjustment position between recombination electron-hole pairs and also the reduction of potential conduction alignment as a result of RuO(2) incorporation. The suggested mechanisms of RuO(2)/LaNaTaO(3) perovskites for H(2) generation employing either CH(3)OH or pure H(2)O were discussed. The photocatalytic performances of the perovskite photocatalyst were elucidated according to the PL intensity and the photocurrent response investigations.