Lambda 750s uv vis nir spectrometer

The solubility of CBZ, NIC, and SAC in all solvents used in this study (water, ethanol, and ethanol-water mixture with and without PVP) was tested at room temperature, respectively. Excess amount of solid samples were added into 10 mL solvent and vortexes for 20 s. The suspension was placed in horizontal air-shaking bath at 100 rpm for 24 h. Aliquots were filtered and diluted properly for determination of the concentrations of tested samples by Lambda 750S UV/Vis/NIR Spectrometer (PerkinElmer, Waltham, MA, USA). Concentration of CBZ, NIC, and SAC has been measured under the wavelength of 285, 260, and 276 nm respectively. The experiments were carried out in triplicate.

FT-IR spectra of the nanohybrids and the pristine compounds were taken on FT-IR spectrophotometer model Shimadzu IR Affinity-1 in the form of KBr pellets. UV-visible spectra were recorded on Lambda 750 S UV/VIS/NIR Spectrometer (Perkin Elmer, USA) using 2-propanol as solvent. X-Ray diffraction patterns were recorded on Philips PW 3710 powder diffractometer (Ni filtered Cu-Kα radiations). Peak parameters were analyzed using Origin 8.1 software. The d spacing was calculated using Bragg's equation. Transmission electron micrographs (TEM) were taken on Morgagni 268-D TEM, FEI, USA. The thermal stability of AgFeO₂, Ppy and Ppy/AgFeO₂ nanohybrid was investigated using thermal analyzer STA 6000, Perkin Elmer. The samples were heated from 30–800 °C at the rate of 10°C min⁻¹ in N₂ atmosphere at flow rate of 20 ml min⁻¹. For the detection and identification of degradation products, liquid chromatography-mass spectroscopy (LC-MS) was conducted using a Waters XEVO G2-S TOF, USA mass spectrometer equipped with an electrospray ionization interface (ESI) source and operated in negative polarity mode fitted with BEH C18 (1.7 × 50 mm) containing 2.1 packed particles. ACN and mild Q waters containing 0.1% formic acid, pH 2.7, were used as eluents. The experiments were carried out in triplicate for evaluating the effect of nanohybrid catalyst dosage in the degradation of 2,4,6 trichlorophenol.