Abstract A new anode consisting of BaHPO4/SrHPO4 (SrP/BaP) micro-structured materials has been fabricated through two-step electrodeposition technique. Structural, vibrational, morphological, and optical properties of the anode films were investigated employing X-ray diffraction, Raman spectroscopy, scanning electron microscopy (SEM) and UV–Vis absorption spectroscopy, respectively. Photoluminescence (PL), and photo-electrocatalytic (PEC) activities of the samples were investigated and compared with those of the pure BaHPO4 (BaP) and SrHPO4 (SrP) samples. The PEC performance was of the order of 71% within 25 min, which was less than both BaP (99%) and SrP (92%) in the same experimental conditions. These results reveal that BaP thin films combined with SrP microstructures remarkably changed the PL signals, and in turn significantly enhanced the PL activities, while the PEC has been lowered down. This was attributed to the photo-induced electron–hole pairs recombination as electrochemical impedance spectrum and photo-current response have shown. Based on these results, it is believed that the SrP/BaP film behaves as a sensitizer in the system and not as a photo-electrocatalyst.

中文翻译：

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SrHPO4/BaHPO4/FTO负极材料光致发光与光电化学性能的相关性

摘要 通过两步电沉积技术制备了一种由 BaHPO4/SrHPO4 (SrP/BaP) 微结构材料组成的新型阳极。分别采用 X 射线衍射、拉曼光谱、扫描电子显微镜 (SEM) 和紫外-可见吸收光谱研究了阳极薄膜的结构、振动、形态和光学特性。研究了样品的光致发光 (PL) 和光电催化 (PEC) 活性，并与纯 BaHPO4 (BaP) 和 SrHPO4 (SrP) 样品进行了比较。PEC 性能在 25 分钟内达到 71%，低于相同实验条件下的 BaP (99%) 和 SrP (92%)。这些结果表明 BaP 薄膜与 SrP 微结构相结合显着改变了 PL 信号，进而显着增强了 PL 活动，而 PEC 已降低。这归因于光致电子-空穴对复合，如电化学阻抗谱和光电流响应所示。基于这些结果，据信 SrP/BaP 膜在系统中充当敏化剂，而不是光电催化剂。