In this study, ZnO/g-C3N4/V2O5 (ZGV) nanocomposite were constructed via facile wet impregnation method. The prepared samples were comprehensively studied by XRD, FT-IR, BET, Raman, SEM, XPS, UV–vis. absorption, PL spectroscopic and DLS analysis. From various obtained results it is confirmed that the ZnO and V2O5 nanoparticles were well dispersed on the surface of g-C3N4 nanosheets. The energy bandgap of ZGV nanocomposite was tuned from 3.18 eV to 2.06 eV, provides an improved visible light absorption ability and exhibited with immense cutdown on the photogenerated charge carrier’s recombination rate. So that the ZGV photocatalyst showed remarkable degradation performance against mixed dye with 4.3 (Rh B) and 5.6 (MB) folds and tetracycline (4.8) times higher than pure and binary nanocomposite samples under visible light irradiation. The enhanced photocatalytic performance pertained by the nanocomposite was owed to the synergetic effect of heterostructure formation with efficacy charge separation along with dual Z-scheme charge transfer mechanism. Furthermore, the radicals responsive for photocatalytic activity are elucidated by free radical trapping experiment. Eventually, the prominent stability and recyclability of ZGV photocatalyst was confirmed by 5 consecutive recycle runs. The antibacterial test against Streptococcus pneumoniae, Pseudomonas aeruginosa, Escherichia coli, and Bacillus cereus were investigated. The toxicity measurement by using treated water for plant growth also revealed. Based on the results, this work suggests that the rational design and construction of heterostructure nanocomposite possess significant potential on highly efficient and reusable visible light photocatalysts for the purification of environment and energy conversion process.

中文翻译：

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双Z-Scheme ZnO/g-C3N4/V2O5非均相纳米复合材料在可见光照射下对混合染料和药物进行光催化净化的协同效应


在本研究中，通过简单的湿浸渍法构建了 ZnO/g-C ₃ N ₄ /V ₂ O ₅ （ZGV） 纳米复合材料。通过 XRD、FT-IR、BET、Raman、SEM、XPS、UV-vis. 吸收、PL 光谱和 DLS 分析对制备的样品进行了综合研究。从获得的各种结果证实，ZnO 和 V ₂ O ₅ 纳米颗粒很好地分散在 g-C ₃ N ₄ 纳米片的表面。ZGV 纳米复合材料的能带隙从 3.18eV 调整到 2.06eV，提供了改进的可见光吸收能力，并表现出对光生电荷载流子复合速率的巨大降低。因此，在可见光照射下，ZGV 光催化剂对 4.3 （Rh B） 和 5.6 （MB） 折叠的混合染料和四环素 （4.8） 表现出显著的降解性能，比纯和二元纳米复合样品高。纳米复合材料增强的光催化性能归因于异质结构形成与功效电荷分离以及双 Z 型电荷转移机制的协同效应。此外，通过自由基捕获实验阐明了对光催化活性有反应的自由基。最终，ZGV 光催化剂的突出稳定性和可回收性被连续 5 次回收运行证实。研究了针对肺炎链球菌、铜绿假单胞菌、大肠杆菌和蜡样芽孢杆菌的抗菌试验。使用处理过的水进行植物生长的毒性测量也揭示了。 基于这些结果，本工作表明，异质结构纳米复合材料的合理设计和构建在高效和可重复使用的可见光光催化剂净化环境和能量转换过程中具有重要潜力。