Autosorb iq gas sorption instrument

The evaluation of the textural properties of the crushed coal waste and the produced composites was based on Brunauer–Emmett–Teller (BET) nitrogen adsorption analyses of the degassed samples done at 77 Kelvin. An Autosorb iQ gas sorption instrument (Quantachrome Instruments, USA) with Quantachrome® ASiQwinTM software interfaces the Autosorb iQ to a computer to enable data acquisition and reduction. The pore size distribution was calculated from the nitrogen adsorption data based on the non-local density functional theory calculation model.

The ligand 1,4-di(1H-imidazol-4-yl)benzene (L) was prepared as previously described [33 (link)]. Other chemical reagents and solvents were purchased commercially and were used as received without further purification. Elemental analyses were performed using a Perkin-Elmer 2400 elemental analyzer (Perkin-Elmer, Inc., Billerica, MA, USA). The infrared spectrum was recorded on a Nicolet Fourier Transform IR (Nicolet Instrument Inc., Madison, WI, USA), and a Nicolet MAGNA-IR 500 spectrometer (Nicolet Instrument Inc., Madison, WI, USA) in the range of 500–4000 cm⁻¹ using the KBr disc technique. Thermogravimetric analyses (TGA) were performed on a computer-controlled Perkin-Elmer 7 Series/UNIX TGA7 analyzer (Perkin-Elmer, Inc., Billerica, MA, USA). Gas adsorption experiments were carried out on an Autosorb-iQ gas sorption instrument in Quantachrome Instruments U.S (Quantachrome, Delray Beach, FL, USA). The sample was activated by using the “outgas” function of the surface area analyzer (Quantachrome, Delray Beach, FL, USA) for 24 h at 160 °C. Photoluminescence spectra for the solid samples were recorded with a HORIBA FluoroMax-4 fluorescence spectrophotometer at room temperature. The decay lifetimes were measured with an FLS920P fluorescence spectrometer (Edinburgh Instruments, Edinburgh, UK) in the solid state at room temperature.