Chemical reactivity, optical and electronic features of conventional photocatalysts can be improved by chemical modification and nanocomposites fabrication techniques. Herein, a double Z-scheme LaFeO3/B-g-C3N4/WO3 (LFO/B-CN/WO) heterostructure nanocomposite has been successfully fabricated via a hydrothermal approach. XRD, FT-IR, SEM/EDS, TEM, TGA/DSC, and UV–visible spectroscopy confirmed crystallographic planes, phase purity, and heterojunction between LFO, WO and B-CN. From UV visible absorption spectroscopy, it was confirmed that optical band gap energy of CN is remarkably reduced after boron doping. The LFO/B-CN/WO photocatalyst revealed 96 % degradation performance for Navy Blue (NB) dye after visible light irradiation for 130 min under neutral pH conditions. The data were analyzed using pseudo-first and pseudo-second order kinetics models to evaluate the dye degradation kinetics. Compared to the CN, B-CN, LFO-CN and WO-CN photocatalysts, the performance of LFO/B-CN/WO was much significant. Improved light absorption capability, effective spatial separation and prolonged charge-carrying capacity of the double Z-scheme system resulted in enhanced photocatalytic performance. This study offers new insights into the design and synthesis of highly efficient Z-scheme heterojunction photocatalysts for environmental decontamination and clean energy purposes.

中文翻译：

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在 LaFeO3/Bg-C3N4/WO3 双 z 型异质结构上实现高效的海军蓝色染料降解


传统光催化剂的化学反应性、光学和电子特性可以通过化学改性和纳米复合材料制造技术得到改善。在此，通过水热方法成功制备了双Z型LaFeO3/Bg-C3N4/WO3（LFO/B-CN/WO）异质结构纳米复合材料。 XRD、FT-IR、SEM/EDS、TEM、TGA/DSC 和紫外可见光谱证实了 LFO、WO 和 B-CN 之间的晶面、相纯度和异质结。紫外可见吸收光谱证实硼掺杂后CN的光学带隙能量显着降低。在中性 pH 条件下，可见光照射 130 分钟后，LFO/B-CN/WO 光催化剂对海军蓝 (NB) 染料显示出 96% 的降解性能。使用准一级和准二级动力学模型对数据进行分析，以评估染料降解动力学。与CN、B-CN、LFO-CN和WO-CN光催化剂相比，LFO/B-CN/WO的性能更加显着。双Z型体系改善的光吸收能力、有效的空间分离和延长的电荷承载能力导致光催化性能增强。这项研究为用于环境净化和清洁能源的高效 Z 型异质结光催化剂的设计和合成提供了新的见解。