The Sn-doped α-Fe₂O₃ nanorods were embedded with {0 0 1} facets exposed TiO₂ flakes by a facile hydrothermal synthesis and post-calcination treatment (denoted as E-Sn-Fe₂O₃/TiO₂). The {0 0 1} facets exposed TiO₂ flakes were derived from the delaminated Ti₃C₂T_X MXene (D-Ti₃C₂T_X) without adding extra HF or F ions during hydrothermal synthesis because the surface of D-Ti₃C₂T_X was natively terminated by –F functional groups. The Sn-doped hematite/surface-covered TiO₂ (denoted as S-Sn-Fe₂O₃/TiO₂) and Sn-doped hematite (denoted as Sn-Fe₂O₃) were also fabricated for comparison. Under simulated sunlight, the E-Sn-Fe₂O₃/TiO₂ yielded a photocurrent density of 0.85 mA cm⁻² at 1.23 V (vs. RHE) compared with 0.72 mA cm⁻² and 0.42 mA cm⁻² for S-Sn-Fe₂O₃/TiO₂ and Sn-Fe₂O₃, respectively. The E-Sn-Fe₂O₃/TiO₂ achieved an IPCE value of 18.6% at 380 nm (15.8% for S-Sn-Fe₂O₃/TiO₂ and 10.4% for Sn-Fe₂O₃) and exhibited enhanced IPCE values at all measured wavelengths compared with the other two photoanodes. The unique architecture of embedded TiO₂ can improve the interfacial contact between the α-Fe₂O₃ and TiO₂ as well as the light harvesting of the α-Fe₂O₃ compared with the surface-covered TiO₂, which contributes to the better charge-transport ability and enhanced PEC performance. The exposed {0 0 1} facets of TiO₂ in the E-Sn-Fe₂O₃/TiO₂ photoanode may also facilitate the charge transfer and improve the PEC performance.

上述Sn-掺杂的α-Fe _2个ö ₃纳米棒嵌入有{001}面露出的TiO _2个通过一个浅显的水热合成和后煅烧处理（表示为E-加Sn-Fe薄片₂ ö ₃ /二氧化钛₂）。{0 0 1}暴露的TiO ₂薄片来自分层的Ti ₃ C ₂ T _X MXene（D-Ti ₃ C ₂ T _X），而在水热合成过程中没有添加额外的HF或F离子，因为D-Ti的表面₃ C ₂ T _X被–F功能组本机终止。为了比较，还制造了Sn掺杂的赤铁矿/表面覆盖的TiO ₂（表示为S-Sn-Fe ₂ O ₃ / TiO ₂）和Sn掺杂的赤铁矿（表示为Sn-Fe ₂ O ₃）。在模拟阳光下，E-Sn-Fe ₂ O ₃ / TiO ₂在1.23 V（vs. RHE）下产生的光电流密度为0.85 mA cm ^-2，而S-Sn-Fe ₂ O ₃ / TiO ₂的光电流密度为0.72 mA cm ^-2和0.42 mA cm ^-2。 Sn-Fe ₂ O ₃ / TiO ₂和Sn-Fe ₂ O ₃， 分别。的E-加Sn-Fe ₂ ö ₃ /二氧化钛₂在380nm处达到18.6％的IPCE值（15.8％S-加Sn-Fe ₂ ö ₃ /二氧化钛₂和10.4％对加Sn-Fe ₂ ö ₃），并显示与其他两个光电阳极相比，在所有测得的波长处增强的IPCE值。的嵌入的TiO独特架构₂可以改善之间的界面接触的α-Fe ₂ ö ₃和TiO ₂以及所述的光捕获的α-Fe ₂ ö ₃与表面被覆的氧化钛相比，₂，这有助于更好的电荷传输能力和增强的PEC性能。E-Sn-Fe ₂ O ₃ / TiO _2光阳极中TiO ₂暴露的{0 0 1}面也可以促进电荷转移并改善PEC性能。