Because of unrestricted disposal, the concentration of reactive dyes in wastewater is gradually increasing. Owing to their eco-toxicity their removal becomes so crucial. In this regard, Bi(0)-doped g-CN/BiWO (g-CN/Bi@BiWO) nanocomposites were prepared by wet impregnation followed by calcination. Remarkably, the Bi(0) doping occurs concertedly during the preparation of BiWO without the addition of any extra reducing agent. The efficacy of the photocatalyst for eliminating reactive orange 16 was evaluated under visible light irradiation. XRD, FESEM, HRTEM, DRS, XPS, BET, etc., were employed to characterize these hybrids. The presence of Bi(0) was confirmed by HRTEM and XPS. Increasing the g-CN content enhances the specific surface and reduces the charge transfer resistance. Among the various photocatalysts, the 20 wt% g-CN/Bi@BiWO hybrid owned the highest degradation efficiency of 89 % after 300 min of reaction time. The controlled experiments confirm the participation of holes and superoxide anions during the reactions. The various reaction intermediates were detected by HRMS providing the necessary evidence about the mechanism. The heterostructure possesses excellent reusability and stability. Due to enhanced catalytic activity, high stability, and ease of synthesis, the reported composite can be considered as a promising catalyst for the degradation of pollutants.

中文翻译：

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双掺杂g-C3N4/Bi2WO6三元复合材料在可见光照射下对活性橙16具有优异的光催化降解作用


由于处置不加限制，废水中活性染料的浓度逐渐升高。由于它们的生态毒性，去除它们变得至关重要。为此，通过湿法浸渍和煅烧制备了 Bi(0) 掺杂的 g-CN/BiWO (g-CN/Bi@BiWO) 纳米复合材料。值得注意的是，Bi(0) 掺杂在 BiWO 的制备过程中协同发生，无需添加任何额外的还原剂。在可见光照射下评价光催化剂消除活性橙16的功效。采用 XRD、FESEM、HRTEM、DRS、XPS、BET 等对这些杂化物进行表征。通过 HRTEM 和 XPS 证实了 Bi(0) 的存在。增加g-CN含量可增强比表面并降低电荷转移电阻。在各种光催化剂中，20 wt% g-CN/Bi@BiWO 杂化物在 300 分钟的反应时间后具有最高的降解效率，达到 89%。对照实验证实了反应过程中空穴和超氧阴离子的参与。 HRMS 检测到各种反应中间体，提供了有关该机制的必要证据。该异质结构具有良好的可重用性和稳定性。由于催化活性增强、稳定性高且易于合成，所报道的复合材料可被认为是一种有前景的污染物降解催化剂。