CrTiO₂ nanotube, tungsten-modified CrTiO₂, iron-modified CrTiO₂ and tungsten–iron-modified CrTiO₂ have been prepared by facile one-step anodization coupled with chemical bath deposition method. XRD, FE-SEM, EDX mapping and UV–Vis spectroscopy were used to characterize the synthetic samples. The impacts of these compounds on the photoelectrochemical activities of modified CrTiO₂ photoelectrodes have been studied. Photoelectrochemical (PEC) water splitting performance of bare CrTiO₂ nanotube photoelectrodes has remarkably been increased by hybrid tungsten–iron–CrTiO₂ nanotube composite photoelectrodes. Good photoelectrocatalytic and stable photoelectrochemical performance have been shown by tungsten–iron–CrTiO₂ (denoted as S6). The synergistic effect of WO₃, Fe₂O₃ and CrTiO₂ can be accounted for the considerable increase in the performance of tungsten–iron-modified CrTiO₂, enhancement of optical absorption in the visible region and the suitable band positions of these composites. Ultimately, the recyclability of the synthetic tungsten–iron-modified CrTiO₂ photocatalysts showed the good stability of their photocatalytic activity.

中文翻译：

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用于水分解的WO 3 –Fe 2 O 3 / CrTiO 2薄膜光阳极的形貌，结构，光学和光电化学性质的研究

CrTiO ₂纳米管，钨改性的CrTiO ₂，铁改性的CrTiO ₂和钨铁改性的CrTiO ₂，是通过简便的一步阳极氧化和化学浴沉积法制备的。XRD，FE-SEM，EDX作图和UV-Vis光谱用于表征合成样品。研究了这些化合物对改性CrTiO ₂光电极的光电化学活性的影响。钨-铁-CrTiO ₂杂化显着提高了裸露的CrTiO ₂纳米管光电极的光化学（PEC）水分解性能纳米管复合光电极。钨-铁-CrTiO ₂（表示为S6）已显示出良好的光电催化性能和稳定的光电化学性能。WO ₃，Fe ₂ O ₃和CrTiO ₂的协同作用可以解释为钨铁改性的CrTiO ₂性能的显着提高，可见光区域光吸收的增强以及这些复合材料的合适能带位置。最终，合成钨铁改性的CrTiO ₂光催化剂的可回收性显示出其光催化活性的良好稳定性。