Lab ram hr evolution instrument

Nuclear magnetic resonance spectroscopy (NMR) analysis was conducted to verify the successful synthesis of 25DTF. NMR images of 25DTF were recorded by using a JNM-ECS 400 M (JEOL, Japan), 25DTF (50 mg) was dissolved of in 0.5 mL of DMSO-d₆. (¹H RF frequency: 399.782MHZ; ¹³C RF frequency: 100.525MHZ. Contact time: 2.0 ms, Number of scans: 1024, Delay time: 5 s, Sampling time: 34.5 ms)).
Fourier-transform infrared (FT-IR) spectra were conducted to confirm the successful preparation of 25DTF using a Nicolet NEXUS 670 infrared spectrophotometer (Nicolet, NEXUS 670, USA). 1 mg of 25DTF was weighed and then mixed with 100 mg of dry KBr, and subsequently compacted into a 10 mm transparent sheet using a tablet press. FT-IR spectra were obtained from the sheet in the range of 400 to 4000 cm⁻¹ with a data acquisition rate of 4 cm⁻¹ per point and Automatic smoothing.
Raman spectrometer was employed to assess the successful preparation of 25DTF. Specifically, 20 mg of 25DTF was directly compressed into a tablet from the powder sample, and then placed on a slide for analysis using the Lab RAM HR Evolution instrument (HORIBA FRANCE SAS, France) to characterize the 25DTF.

The microstructure and surface topography of all the sensing films were analyzed using field emission SEM (SU-8010, Hitachi, Ltd., Japan). The changes in the colloidal chemical structure before and after the addition of carbon nanotubes were measured using Raman spectroscopy. Specifically, a LabRAM HR evolution instrument from Horiba Scientific, Japan, was employed for this analysis. Furthermore, the changes in the contact area in the sensing were observed using an inverted metallographic microscope (model IE500M) from Sunny Optical Technology (Group) Co., Ltd., China.

The Zeiss Merlin scanning electron microscopy (SEM, Zeiss, Jena, Germany) was used for characterizing the surface morphologies of samples. N₂ adsorption/desorption isotherms were measured at liquid nitrogen temperature using a Quantachrome Autosorb-iQ gas sorption analyzer (Quantachrome, Boynton Beach, FL, USA). Before the measurements, the porous carbon sample with a mass of approximately 100 mg was pretreated at 150 °C for 4 h under vacuum condition. A Nicolet iS5 FT-IR spectrophotometer (Thermo Fisher Scientific, Waltham, MA, USA) was used for recording the IR spectra. An Axis Ultra DLD spectrometer (Kratos Analytical, Manchester, UK) was applied for performing the XPS measurements. A LabRAM HR Evolution instrument (Horiba, Longjumeau, France) was applied for measuring the Raman spectra. The optical adsorptions of RhB and CAP solutions were measured on an Agilent Cary60 UV-Vis spectrophotometer (Agilent Technologies, Santa Clara, CA, USA). Element analysis of C, H, N, S, and O was performed on a vario EL Cube elemental analyzer (Elementar Analysensysteme GmbH, Langenselbold, Germany).