Bismuth-based Sillen-Aurivillius compounds are being explored as efficient photocatalyst materials for the degradation of organic pollutants due to their unique layered structure that favours effective separation of electron-hole pairs. In this work, we synthesized Sillen-Aurivillius-related Bi₂YO₄Cl with the bandgap of 2.5 eV by a simple solid-state reaction and sensitized with rhodium nickel (RhNi) nanoparticles (NPs) to form the RhNi/Bi₂YO₄Cl heterostructure. Photocatalytic activities of BiOCl, Bi₂YO₄Cl and the RhNi/Bi₂YO₄Cl heterostructure were examined for the degradation of rhodamine- 6G under visible-light illumination. Results demonstrated that the photocatalytic dye degradation efficiency of RhNi/Bi₂YO₄Cl heterostructures is higher than those of BiOCl and Bi₂YO₄Cl, attributed to the synergistic molecular-scale alloying effect of bimetallic RhNi NPs. The plausible mechanism for the degradation of rhodamine-6G and the effective electron-hole pair utilization mechanism were discussed.

铋基Sillen-Aurivillius化合物因其独特的层状结构（有利于有效分离电子-空穴对）而被研究为降解有机污染物的有效光催化剂材料。在这项工作中，我们通过简单的固态反应合成了带隙为2.5 eV的Sillen-Aurivillius相关的Bi ₂ YO ₄ Cl，并用铑镍（RhNi）纳米粒子（NPs）敏化以形成RhNi / Bi ₂ YO ₄ Cl异质结构。BiOCl，Bi ₂ YO ₄ Cl和RhNi / Bi ₂ YO _4的光催化活性在可见光下检查Cl异质结构对若丹明-6G的降解。结果表明，RhNi / Bi ₂ YO ₄ Cl异质结构的光催化染料降解效率高于BiOCl和Bi ₂ YO ₄ Cl，这归因于双金属RhNi NPs的协同分子尺度合金化作用。讨论了若丹明-6G降解的合理机理和有效的电子-空穴对利用机理。