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<p>Antimony sulphohalides possess a unique combination of semiconducting, ferroelectric, piezoelectric, and photocatalytic properties. A comparative analysis of these characteristics, particularly for the related compounds SbSI and SbSBr, holds significant interest from both fundamental and applied standpoints. This study presents a solution-phase synthesis method for producing antimony sulphoiodide and sulphobromide. The synthesis proceeds via a two-stage process involving an intermediate antimony sulphide phase. For SbSBr, the presence of an excess of bromide ions in the reaction medium is required. The synthesized materials were characterized using X-ray diffraction (XRD), X-ray fluorescence (XRF), and microstructural analysis, and their catalytic performance was thoroughly evaluated. Photocatalytic activity was assessed by photocolorimetric monitoring of the Rhodamine B (RhB) degradation in the presence of SbSI and SbSBr as photocatalysts. Both materials demonstrated high adsorption affinity for this dye. The high degree of surface coverage by adsorbed dye molecules initially poses challenges for photoexcitation of the catalyst and for maintaining a constant equilibrium surface concentration of the oxidant. As a result, the degradation mechanism, predominantly driven by singlet oxygen and superoxide anions, exhibited biphasic kinetics. An initial slow stage corresponds to the gradual decrease in the concentration of adsorbed dye. Subsequently, as the surface coverage diminishes, the kinetics of RhB photodegradation begin to follow first-order kinetics.</p>

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Synthesis in the water solution, semiconductor, and photocatalytic properties of ferroelectrics SbSI and SbSBr: comparative analysis

  • 期刊论文

  • 发表日期：

    2026年2月16日

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  • Diana Vladimirovna Chirkova,
  • Envyar Aleksandrovich Bikyashev,
  • Inna Victorovna Lisnevskaya

摘要

Antimony sulphohalides possess a unique combination of semiconducting, ferroelectric, piezoelectric, and photocatalytic properties. A comparative analysis of these characteristics, particularly for the related compounds SbSI and SbSBr, holds significant interest from both fundamental and applied standpoints. This study presents a solution-phase synthesis method for producing antimony sulphoiodide and sulphobromide. The synthesis proceeds via a two-stage process involving an intermediate antimony sulphide phase. For SbSBr, the presence of an excess of bromide ions in the reaction medium is required. The synthesized materials were characterized using X-ray diffraction (XRD), X-ray fluorescence (XRF), and microstructural analysis, and their catalytic performance was thoroughly evaluated. Photocatalytic activity was assessed by photocolorimetric monitoring of the Rhodamine B (RhB) degradation in the presence of SbSI and SbSBr as photocatalysts. Both materials demonstrated high adsorption affinity for this dye. The high degree of surface coverage by adsorbed dye molecules initially poses challenges for photoexcitation of the catalyst and for maintaining a constant equilibrium surface concentration of the oxidant. As a result, the degradation mechanism, predominantly driven by singlet oxygen and superoxide anions, exhibited biphasic kinetics. An initial slow stage corresponds to the gradual decrease in the concentration of adsorbed dye. Subsequently, as the surface coverage diminishes, the kinetics of RhB photodegradation begin to follow first-order kinetics.