期刊
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
卷 147, 期 14, 页码 7675-7682出版社
SPRINGER
DOI: 10.1007/s10973-021-11090-w
关键词
Nanocomposite; Polymeric carbon nitride; Thermal decomposition; Gases analysis; DSC-TG-QMS-FTIR; Evolved gas analysis
资金
- Polish National Science Centre [UMO-2013/11/D/ST8/03429]
- European Regional Development Fund [POIG.02.02.00-14-024/08]
By utilizing microwave hydrothermal synthesis and gas analysis, this study demonstrates that the PCN-Al2O3-ZrO2 nanocomposite prepared at 400 degrees Celsius exhibits good thermal stability, releasing mainly ammonia, cyanic acid, water, and carbon dioxide during thermal decomposition.
Polymeric carbon nitride (PCN) was recently found to have extensive applications in the field of photocatalysis. Knowledge about thermal stability of PCN nanocomposites is crucial for this application and designing the final product. In this work, the thermal stability of PCN-Al2O3-ZrO2 nanocomposites was investigated. PCN nanocomposites were obtained in two steps: (1) microwave hydrothermal synthesis of co-precipitated AlOOH and ZrO2 precursors, followed by drying; (2) mixing the nanopowders with melamine powder and annealing in air in a tube furnace at 400, and 450 degrees C. The PCN nanocomposites were examined by attenuated total reflection technique of Fourier transformed infrared spectroscopy. Also, the evolved gas analysis was performed combining differential scanning calorimetry and thermogravimetry coupled with mass spectroscopy and FTIR. The results show that only PCN-Al2O3-ZrO2 nanocomposite obtained at 400 degrees C is stable from room temperature up to 490 degrees C and during thermal decomposition, in one step releases ammonia (NH3), cyanic acid (HNCO), water (H2O), and carbon dioxide (CO2). The limitation of the PCN-Al2O3-ZrO2 thermal stability and performance is AlOOH-ZrO2 used as a nanocomposite component.
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