Uv 2700 uv visible spectrophotometer

The fluorescence spectra were recorded on a Hitachi FL-4600 spectrophotometer (Japan). The UV-vis spectra in the 200–600 nm⁻¹ region were recorded on a Shimadzu UV-2700 UV-visible spectrophotometer (Japan). The microstructures were analyzed on a JEM-2100 F high-resolution transmission electron microscope (Japan). Fourier transform infrared spectra in the 4000–500 cm⁻¹ region were recorded on a spectrum two Fourier transform infrared spectrometer (Germany) using KBr as the white background. Elemental analysis was performed using X-ray photoelectron spectroscopy (Japan). The fluorescence lifetime was measured on an FLS-920 transient/steady-state fluorescence spectrometer from Edinburgh Instruments (UK). Electrochemical tests were performed using a CHI-660D system (China).

The UV spectra were recorded on a UV-2700 UV-visible spectrophotometer (Shimadzu Instrument Inc., Japan). The crystal phase of the nanoparticles was identified by scanning electron microscopy (Bruker, Germany). The Fourier transform infrared (FTIR) spectra were recorded with a spectrometer. The crystal phase of the nanoparticles was determined using a D8-Advance X-ray diffractometer (Bruker, Germany). A TG 209 F1 Libra thermogravimetric analyzer (Netzsch, Germany) was used for thermogravimetric analysis (TGA). The fluorescence spectra were recorded using a FluoroMax-4 spectrofluorometer (HORIBA Jobin Yvon, Inc., NJ).