Garg Seema, Yadav Mohit, Chandra Amrish, Sapra Sameer, Gahlawat Soniya, Ingole Pravin P, Pap Zsolt, Hernadi Klara
Department of Chemistry, Amity Institute of Applied Sciences, Amity University Sector-125 Noida 201313 Uttar Pradesh India
Amity Institute of Nanotechnology, Amity University Sector-125 Noida 201313 Uttar Pradesh India.
RSC Adv. 2018 Aug 14;8(51):29022-29030. doi: 10.1039/c8ra05661g.
In the recent past, there has been a large-scale utilization of plant extracts for the synthesis of various photocatalysts. The biofabrication technology eliminates the usage of harmful chemicals and serves as an eco-friendly approach for environmental remediation. Herein, a comparative analysis between bismuth oxyiodide synthesized (neem) leaf extract (BiOI-G) and without leaf extract (BiOI-C) has been envisaged. The BiOI-G and BiOI-C samples were characterized by spectral and microscopic techniques, which revealed that the assisted BiOI-G attained enhanced features over BiOI-C such as narrower band gap, large surface area, porosity, increased absorption range of visible light and effectual splitting of the photogenerated e-h pairs. Benefiting from these enhanced features, BiOI-G degraded methyl orange (MO), rhodamine B (RhB), and benzotriazole (BT) at a significantly higher rate in comparison to BiOI-C. The degradation rate of MO, RhB and BT by BiOI-G was observed to be 1.3, 1.25 and 1.29 times higher in comparison to BiOI-C. Moreover, BiOI-G displayed high stability upto five cycles of the photocatalytic activity, which endow its effectiveness as a highly-efficient green photocatalyst.
近年来，植物提取物被大规模用于合成各种光催化剂。生物制造技术消除了有害化学物质的使用，是一种环境修复的环保方法。在此，设想了对用（印楝）叶提取物合成的碘氧化铋（BiOI-G）和不用叶提取物合成的碘氧化铋（BiOI-C）进行比较分析。通过光谱和显微镜技术对BiOI-G和BiOI-C样品进行了表征，结果表明，叶提取物辅助合成的BiOI-G比BiOI-C具有更优异的特性，如带隙更窄、表面积更大、孔隙率更高、可见光吸收范围增加以及光生电子-空穴对的有效分离。受益于这些增强的特性，与BiOI-C相比，BiOI-G对甲基橙（MO）、罗丹明B（RhB）和苯并三唑（BT）的降解速率显著更高。观察到BiOI-G对MO、RhB和BT的降解速率分别比BiOI-C高1.3倍、1.25倍和1.29倍。此外，BiOI-G在光催化活性的五个循环中均表现出高稳定性，这赋予了其作为高效绿色光催化剂的有效性。
