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氧化石墨烯/罗丹明6G改性滤纸的制备及性能
Preparation and Properties of Graphene Oxide/Rhodamine 6G Modified Filter Paper
收稿日期:2023-11-10  
DOI:10.11980/j.issn.0254-508X.2024.03.005
关键词:  滤纸  氧化石墨烯  罗丹明6G  铁离子  检测性能
Key Words:filter paper  graphene oxide  rhodamine 6G  iron ion  detection performances
基金项目:陕西工业职业技术学院自然科学类重点项目(2023YKZD-005);咸阳市重点研发计划项目(2021ZDYF-GY-0042);陕西省专家服务计划(2022WGZJ-11);生物质化学与材料国际联合研究中心(2018GHJD-19)。
作者单位邮编
范江 陕西工业职业技术学院陕西咸阳712000
陕西科技大学轻工科技与工程学院陕西西安710021 
710021
张素风* 陕西科技大学轻工科技与工程学院陕西西安710021 710021
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摘要:利用氧化石墨烯(GO)和罗丹明6G-聚乙烯亚胺(R6G-PEI)对滤纸(FP)进行物理改性,制备了纸基传感器FP/GO/R6G-PEI。利用扫描电子显微镜、X-射线衍射仪、伺服材料多功能高低温控制试验机、紫外光谱仪和荧光光谱仪等,对FP/GO/R6G-PEI的形貌、力学性能和传感性能进行表征。结果表明,与FP、FP/GO相比,FP/GO/R6G-PEI的表面平滑度提高,透气度降低,力学性能增大。将FP/GO/R6G-PEI浸泡于Fe3+溶液中时,观察到FP/GO/R6G-PEI变为淡粉红色,且荧光强度显著增强,可实现FP/GO/R6G-PEI对水中的Fe3+肉眼可见和荧光检测。理想识别单元Structure 3与Fe3+的能级差(0.53 eV)小于Structure 3的能极差(3.12 eV),说明Structure 3与Fe3+的螯合体系更稳定。
Abstract:The paper-based sensor FP/GO/R6G-PEI was prepared by physically modifying the filter paper (FP) with graphite oxide (GO) and rhodamine 6G-polyethyleneimine (R6G-PEI). The morphology, mechanical properties, and sensing performances of FP/GO/R6G-PEI were characterized by scanning electron microscope, X-ray diffraction,servo material multi-functional high and low temperature control testing machine, UV-vis spectrometer, and PL spectrometer. Compared with FP and FP/GO, the surface smoothness and mechanical property of FP/GO/R6G-PEI increased, while the air permeability decreased. When FP/GO/R6G-PEI was immersed in Fe3+ solution, it was observed that FP/GO/R6G-PEI turned pale pink, and the fluorescence intensity was significantly enhanced, which realized the visual detection and fluorescence detection of FP/GO/R6G-PEI to Fe3+ in water. The energy gap between Structure 3 and Fe3+ (0.53 eV) was obviously smaller than that of Structure 3 (3.12 eV), indicating that the chelating system was more stable after the interaction of structure 3 with Fe3+.
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