In this work, a facile polyvinylpyrrolidone (PVP) assisted solvothermal route using mixed solvents was reported to synthesize uniform quaternary chalcogenide Cu₂FeSnS₄ (CFTS) particles. PVP played a crucial role in tuning the shape and size of the resulted CFTS particles. Without PVP irregular shaped CFTS particles were obtained, however, quasi-spherical CFTS particles were produced by addition of PVP. The average particle sizes of particles were in the range of ~ 360 to ~ 230 nm. Moreover, the photodegradation of Rhodamine-B (RhB) with CFTS particles under visible light was investigated and optimized in terms of PVP concentration, catalyst dosage, dye concentration and pH of the solution. The quenching experiments for reactive species indicates that both hydroxyl and superoxide radicals play roles in the photodegradation. The stability of the as-prepared CFTS particles was demonstrated by reusing it in five consecutive degradation cycles.

在这项工作中，据报道，使用混合溶剂的简便的聚乙烯吡咯烷酮（PVP）辅助溶剂热途径可合成均匀的季硫属元素化物Cu ₂ FeSnS ₄（CFTS）粒子。PVP在调整所得CFTS颗粒的形状和尺寸方面起着至关重要的作用。在没有PVP的情况下，获得了不规则形状的CFTS颗粒，但是，通过添加PVP产生了准球形的CFTS颗粒。颗粒的平均粒径在〜360至〜230nm的范围内。此外，研究了CFTS颗粒在可见光下对罗丹明B（RhB）的光降解，并根据溶液中PVP浓度，催化剂用量，染料浓度和pH值进行了优化。活性物种的猝灭实验表明，羟基和超氧化物自由基均在光降解中起作用。通过在五个连续的降解循环中重复使用，证明了所制备CFTS颗粒的稳定性。