Preparation and Properties of Graphene Oxide/Rhodamine 6G Modified Filter Paper
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 test-ing 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+.