For the photocatalytic test, gold nanoparticles (AuNPs) were prepared using trisodium citrate dehydrate (TCD), following which they were combined on the surface of zinc oxide (ZnO) to prepare ZnO decorated with uniform AuNPs (ZnO/AuNP) photocatalysts. The photocatalytic performance with the ZnO/AuNP was estimated through the rhodamine B (RB) dye degradation under solar irradiation. ZnO/AuNP-30 showed the greatest photocatalytic performance, achieving dye degradation efficiency up to 78.65%. Photoelectrochemical (PEC) measurements were performed using the ZnO/AuNP photoanodes. With AuNP doping amounts of 10, 20, and 30 mL on the ZnO surface, photocurrent densities of 47.46, 63.74, and 68.64 mA cm⁻², respectively, were achieved at an applied voltage of 1.5 V. These values indicated that the doping of AuNPs on the ZnO surface is advantageous for enhancing its PEC water-splitting activity. The highest solar-to-hydrogen (STH) efficiency is 22% with the ZnO/AuNP-30 photoanode at an applied voltage of 0.88 V. The interfacial charge-transfer resistances at the interface were 40 and 2.2 kΩ cm² for the ZnO and ZnO/AuNP-30 photoanodes, respectively.

对于光催化测试，使用脱水柠檬酸三钠 (TCD) 制备金纳米粒子 (AuNPs)，然后将它们结合在氧化锌 (ZnO) 表面上以制备用均匀 AuNPs (ZnO/AuNP) 光催化剂装饰的 ZnO。ZnO/AuNP 的光催化性能是通过罗丹明 B (RB) 染料在太阳辐射下的降解来评估的。ZnO/AuNP-30 表现出最大的光催化性能，染料降解效率高达 78.65%。使用 ZnO/AuNP 光阳极进行光电化学 (PEC) 测量。在 ZnO 表面上的 AuNP 掺杂量为 10、20 和 30 mL，光电流密度为 47.46、63.74 和 68.64 mA cm ^-2分别在 1.5 V 的施加电压下实现。这些值表明在 ZnO 表面掺杂 AuNPs 有利于增强其 PEC 水分解活性。ZnO/AuNP-30 光阳极在 0.88 V 的施加电压下的最高太阳能到氢 (STH) 效率为 22%。界面处的界面电荷转移电阻为 40 和 2.2 kΩ cm ²对于 ZnO 和分别为 ZnO/AuNP-30 光阳极。