Designing advanced structures for heterojunction photocatalysts is an effective approach to enhance their performance toward solar‐energy conversion. Herein we develop a facile synthetic strategy for the fabrication of Fe₂O₃‐TiO₂ microdumbbells. With the assistance of preferentially adsorbed hexadecylamine molecules, amorphous TiO₂ nanospheres with tunable size are grown at the two ends of Fe‐based metal–organic compound microrods. Subsequent annealing of the hybrid obtained leads to the formation of a novel heterostructured Fe₂O₃‐TiO₂ microdumbbell photocatalyst. Owing to the heterojunction formed and the unique structure, Fe₂O₃‐TiO₂ microdumbbells with optimized composition and morphology show enhanced performance for photoelectrochemical water oxidation, compared to monophasic Fe₂O₃ and TiO₂ materials as well as physical mixtures thereof.

中文翻译：

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用于光电化学水氧化的异结构Fe2O3-TiO2微哑铃的构建

设计异质结光催化剂的先进结构是一种有效的方法，可提高其在太阳能转换方面的性能。本文中，我们为制造Fe ₂ O ₃ -TiO ₂微哑铃开发了一种简便的合成策略。借助优先吸附的十六烷基胺分子，在铁基金属有机化合物微棒的两端生长了尺寸可调的无定形TiO ₂纳米球。随后获得的杂化体的退火导致形成新型的异结构Fe ₂ O ₃ -TiO ₂微哑铃光催化剂。由于形成了异质结和独特的结构，Fe ₂ O与单相Fe ₂ O ₃和TiO ₂材料及其物理混合物相比，具有优化的成分和形态的₃ -TiO ₂微哑铃具有增强的光电化学水氧化性能。