Abstract The present study reveals a simple and efficient method for the green reduction of graphene oxide (GO) employing Emblica officinalis fruit extract as a reducing agent. Here, a green sol–gel method has been reported for the preparation of ZnFe 2 O 4 and ZnFe 2 O 4 -reduced graphene oxide (RGO) nanocomposite (NCO) using Aloe Vera extract as a capping agent. PXRD, FT-IR, SEM, TEM and HRTEM confirmed the analytical aspects of synthesized samples. The band gaps of prepared samples were estimated by UV–Vis analysis. PL quenching appears due to the interaction between the surface of the ZnFe 2 O 4 and RGO sheets. The photoluminescence analysis indicates that the present NCO is an effective white component in display applications. The NCO was found to be an alternate to traditional luminescent powder for a safe detection and qualitative improvement of latent fingerprints deposited onto different surfaces. Further, excellent photocatalytic properties of NCO when compared to that of the commercial P25 for various other dye degradation under Sunlight can be attributed to its specific electrical properties and well connected arrangement derived from the structural support of ZnFe 2 O 4 and RGO. This results in significant electron-acceptor/transport of RGO material that are able to decrease the photo-generated electron–hole recombination thus enhancing the photocatalytic performance.

中文翻译：

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绿色介导的 ZnFe 2 O 4 –RGO 纳米复合材料增强了阳光驱动的光催化性能和潜在指纹的可视化

摘要 本研究揭示了一种以余甘子果实提取物为还原剂绿色还原氧化石墨烯 (GO) 的简单有效方法。在这里，已经报道了使用芦荟提取物作为封端剂制备 ZnFe 2 O 4 和 ZnFe 2 O 4 还原氧化石墨烯 (RGO) 纳米复合材料 (NCO) 的绿色溶胶-凝胶法。PXRD、FT-IR、SEM、TEM 和 HRTEM 证实了合成样品的分析方面。通过UV-Vis分析估计制备样品的带隙。由于 ZnFe 2 O 4 和 RGO 片材表面之间的相互作用，出现 PL 淬火。光致发光分析表明，本发明的 NCO 是显示应用中的有效白色成分。NCO 被发现是传统发光粉末的替代品，用于安全检测和定性改进沉积在不同表面上的潜在指纹。此外，与商用 P25 在阳光下降解各种其他染料时相比，NCO 优异的光催化性能可归因于其特定的电性能和源自 ZnFe 2 O 4 和 RGO 结构支撑的良好连接排列。这导致 RGO 材料的显着电子受体/传输能够减少光生电子 - 空穴复合，从而提高光催化性能。与商用 P25 在阳光下降解各种其他染料时相比，NCO 优异的光催化性能可归因于其特定的电性能和源自 ZnFe 2 O 4 和 RGO 结构支撑的良好连接排列。这导致 RGO 材料的显着电子受体/传输能够减少光生电子 - 空穴复合，从而提高光催化性能。与商用 P25 在阳光下降解各种其他染料时相比，NCO 优异的光催化性能可归因于其特定的电性能和源自 ZnFe 2 O 4 和 RGO 结构支撑的良好连接排列。这导致 RGO 材料的显着电子受体/传输能够减少光生电子 - 空穴复合，从而提高光催化性能。