A novel method was developed for the preparation of porous hematite (α-Fe₂O₃) thin films. First, a solution containing iron precursor was spin-coated on fluorine-doped tin oxide substrate and later short heat-treated at 750º C. The prepared α-Fe₂O₃ thin films were applied as dual-function catalyst in photoelectrochemical (PEC) water oxidation and textile dye degradation studies. For the first time, α-Fe₂O₃ thin films were used in efficient PEC degradation of a textile dye (Basic Blue 41 – B41) using in-situ generated reactive chlorine species. In comparison with photocatalytic and electrocatalytic approaches, the PEC technique allows faster degradation of B41 dye at an applied bias potential of 1.5 V versus reversible hydrogen electrode and under visible light illumination. In the presence of Cl⁻ using the PEC approach the degradation of B41 reaches 99.8%. High-performance liquid chromatography coupled with UV-VIS system confirmed the degradation of B41 dye using PEC. Gas-chromatography coupled to mass spectrometry was used to study the by-products obtained during PEC degradation. Chemical oxygen demand analyses confirmed that the mineralization level of B41 is in the order of 68%. The α-Fe₂O₃ films developed in this study give a higher level of PEC degradation efficiency compared to other iron oxide-based systems.

一种新颖的方法是为多孔赤铁矿（α-Fe的制备开发的₂ ö ₃）薄膜。首先，将含有铁前体的溶液旋涂在氟掺杂的氧化锡基板和后短热处理在750º℃。制备的α-Fe _2层ö ₃薄膜，施加如在光电化学双功能催化剂（PEC）水氧化和纺织品染料降解研究。首次，的α-Fe ₂ ö ₃薄膜用于原位生成的反应性氯，从而有效地对纺织品染料（基本蓝41 – B41）进行PEC降解。与光催化和电催化方法相比，PEC技术可以在 可逆氢电极和可见光照射下，在施加的1.5 V偏置电势下，更快地降解B41染料。在氯的存在下^-使用PEC接近B41的降解达到99.8％。高效液相色谱结合UV-VIS系统证实了PEC对B41染料的降解。气相色谱与质谱联用用于研究PEC降解过程中获得的副产物。化学需氧量分析证实，B41的矿化水平约为68％。α-铁与其他基于氧化铁的系统相比，本研究开发的₂ O ₃膜具有更高的PEC降解效率。